AndroidRemoteController/python/py/Lib/site-packages/sympy/printing/pretty/tests/test_pretty.py

# -*- coding: utf-8 -*-
from sympy.concrete.products import Product
from sympy.concrete.summations import Sum
from sympy.core.add import Add
from sympy.core.basic import Basic
from sympy.core.containers import (Dict, Tuple)
from sympy.core.function import (Derivative, Function, Lambda, Subs)
from sympy.core.mul import Mul
from sympy.core import (EulerGamma, GoldenRatio, Catalan)
from sympy.core.numbers import (I, Rational, oo, pi)
from sympy.core.power import Pow
from sympy.core.relational import (Eq, Ge, Gt, Le, Lt, Ne)
from sympy.core.singleton import S
from sympy.core.symbol import (Symbol, symbols)
from sympy.functions.elementary.complexes import conjugate
from sympy.functions.elementary.exponential import LambertW
from sympy.functions.special.bessel import (airyai, airyaiprime, airybi, airybiprime)
from sympy.functions.special.delta_functions import Heaviside
from sympy.functions.special.error_functions import (fresnelc, fresnels)
from sympy.functions.special.singularity_functions import SingularityFunction
from sympy.functions.special.zeta_functions import dirichlet_eta
from sympy.geometry.line import (Ray, Segment)
from sympy.integrals.integrals import Integral
from sympy.logic.boolalg import (And, Equivalent, ITE, Implies, Nand, Nor, Not, Or, Xor)
from sympy.matrices.dense import (Matrix, diag)
from sympy.matrices.expressions.slice import MatrixSlice
from sympy.matrices.expressions.trace import Trace
from sympy.polys.domains.finitefield import FF
from sympy.polys.domains.integerring import ZZ
from sympy.polys.domains.rationalfield import QQ
from sympy.polys.domains.realfield import RR
from sympy.polys.orderings import (grlex, ilex)
from sympy.polys.polytools import groebner
from sympy.polys.rootoftools import (RootSum, rootof)
from sympy.series.formal import fps
from sympy.series.fourier import fourier_series
from sympy.series.limits import Limit
from sympy.series.order import O
from sympy.series.sequences import (SeqAdd, SeqFormula, SeqMul, SeqPer)
from sympy.sets.contains import Contains
from sympy.sets.fancysets import Range
from sympy.sets.sets import (Complement, FiniteSet, Intersection, Interval, Union)
from sympy.codegen.ast import (Assignment, AddAugmentedAssignment,
    SubAugmentedAssignment, MulAugmentedAssignment, DivAugmentedAssignment, ModAugmentedAssignment)
from sympy.core.expr import UnevaluatedExpr
from sympy.physics.quantum.trace import Tr

from sympy.functions import (Abs, Chi, Ci, Ei, KroneckerDelta,
    Piecewise, Shi, Si, atan2, beta, binomial, catalan, ceiling, cos,
    euler, exp, expint, factorial, factorial2, floor, gamma, hyper, log,
    meijerg, sin, sqrt, subfactorial, tan, uppergamma, lerchphi, polylog,
    elliptic_k, elliptic_f, elliptic_e, elliptic_pi, DiracDelta, bell,
    bernoulli, fibonacci, tribonacci, lucas, stieltjes, mathieuc, mathieus,
    mathieusprime, mathieucprime)

from sympy.matrices import (Adjoint, Inverse, MatrixSymbol, Transpose,
                            KroneckerProduct, BlockMatrix, OneMatrix, ZeroMatrix)
from sympy.matrices.expressions import hadamard_power

from sympy.physics import mechanics
from sympy.physics.control.lti import (TransferFunction, Feedback, TransferFunctionMatrix,
    Series, Parallel, MIMOSeries, MIMOParallel, MIMOFeedback, StateSpace)
from sympy.physics.units import joule, degree
from sympy.printing.pretty import pprint, pretty as xpretty
from sympy.printing.pretty.pretty_symbology import center_accent, is_combining, center
from sympy.sets.conditionset import ConditionSet

from sympy.sets import ImageSet, ProductSet
from sympy.sets.setexpr import SetExpr
from sympy.stats.crv_types import Normal
from sympy.stats.symbolic_probability import (Covariance, Expectation,
                                              Probability, Variance)
from sympy.tensor.array import (ImmutableDenseNDimArray, ImmutableSparseNDimArray,
                                MutableDenseNDimArray, MutableSparseNDimArray, tensorproduct)
from sympy.tensor.functions import TensorProduct
from sympy.tensor.tensor import (TensorIndexType, tensor_indices, TensorHead,
                                 TensorElement, tensor_heads)

from sympy.testing.pytest import raises, _both_exp_pow, warns_deprecated_sympy

from sympy.vector import CoordSys3D, Gradient, Curl, Divergence, Dot, Cross, Laplacian



import sympy as sym
class lowergamma(sym.lowergamma):
    pass   # testing notation inheritance by a subclass with same name

a, b, c, d, x, y, z, k, n, s, p = symbols('a,b,c,d,x,y,z,k,n,s,p')
f = Function("f")
th = Symbol('theta')
ph = Symbol('phi')

"""
Expressions whose pretty-printing is tested here:
(A '#' to the right of an expression indicates that its various acceptable
orderings are accounted for by the tests.)


BASIC EXPRESSIONS:

oo
(x**2)
1/x
y*x**-2
x**Rational(-5,2)
(-2)**x
Pow(3, 1, evaluate=False)
(x**2 + x + 1)  #
1-x  #
1-2*x  #
x/y
-x/y
(x+2)/y  #
(1+x)*y  #3
-5*x/(x+10)  # correct placement of negative sign
1 - Rational(3,2)*(x+1)
-(-x + 5)*(-x - 2*sqrt(2) + 5) - (-y + 5)*(-y + 5) # issue 5524


ORDERING:

x**2 + x + 1
1 - x
1 - 2*x
2*x**4 + y**2 - x**2 + y**3


RELATIONAL:

Eq(x, y)
Lt(x, y)
Gt(x, y)
Le(x, y)
Ge(x, y)
Ne(x/(y+1), y**2)  #


RATIONAL NUMBERS:

y*x**-2
y**Rational(3,2) * x**Rational(-5,2)
sin(x)**3/tan(x)**2


FUNCTIONS (ABS, CONJ, EXP, FUNCTION BRACES, FACTORIAL, FLOOR, CEILING):

(2*x + exp(x))  #
Abs(x)
Abs(x/(x**2+1)) #
Abs(1 / (y - Abs(x)))
factorial(n)
factorial(2*n)
subfactorial(n)
subfactorial(2*n)
factorial(factorial(factorial(n)))
factorial(n+1) #
conjugate(x)
conjugate(f(x+1)) #
f(x)
f(x, y)
f(x/(y+1), y) #
f(x**x**x**x**x**x)
sin(x)**2
conjugate(a+b*I)
conjugate(exp(a+b*I))
conjugate( f(1 + conjugate(f(x))) ) #
f(x/(y+1), y)  # denom of first arg
floor(1 / (y - floor(x)))
ceiling(1 / (y - ceiling(x)))


SQRT:

sqrt(2)
2**Rational(1,3)
2**Rational(1,1000)
sqrt(x**2 + 1)
(1 + sqrt(5))**Rational(1,3)
2**(1/x)
sqrt(2+pi)
(2+(1+x**2)/(2+x))**Rational(1,4)+(1+x**Rational(1,1000))/sqrt(3+x**2)


DERIVATIVES:

Derivative(log(x), x, evaluate=False)
Derivative(log(x), x, evaluate=False) + x  #
Derivative(log(x) + x**2, x, y, evaluate=False)
Derivative(2*x*y, y, x, evaluate=False) + x**2  #
beta(alpha).diff(alpha)


INTEGRALS:

Integral(log(x), x)
Integral(x**2, x)
Integral((sin(x))**2 / (tan(x))**2)
Integral(x**(2**x), x)
Integral(x**2, (x,1,2))
Integral(x**2, (x,Rational(1,2),10))
Integral(x**2*y**2, x,y)
Integral(x**2, (x, None, 1))
Integral(x**2, (x, 1, None))
Integral(sin(th)/cos(ph), (th,0,pi), (ph, 0, 2*pi))


MATRICES:

Matrix([[x**2+1, 1], [y, x+y]])  #
Matrix([[x/y, y, th], [0, exp(I*k*ph), 1]])


PIECEWISE:

Piecewise((x,x<1),(x**2,True))

ITE:

ITE(x, y, z)

SEQUENCES (TUPLES, LISTS, DICTIONARIES):

()
[]
{}
(1/x,)
[x**2, 1/x, x, y, sin(th)**2/cos(ph)**2]
(x**2, 1/x, x, y, sin(th)**2/cos(ph)**2)
{x: sin(x)}
{1/x: 1/y, x: sin(x)**2}  #
[x**2]
(x**2,)
{x**2: 1}


LIMITS:

Limit(x, x, oo)
Limit(x**2, x, 0)
Limit(1/x, x, 0)
Limit(sin(x)/x, x, 0)


UNITS:

joule => kg*m**2/s


SUBS:

Subs(f(x), x, ph**2)
Subs(f(x).diff(x), x, 0)
Subs(f(x).diff(x)/y, (x, y), (0, Rational(1, 2)))


ORDER:

O(1)
O(1/x)
O(x**2 + y**2)

"""


def pretty(expr, order=None):
    """ASCII pretty-printing"""
    return xpretty(expr, order=order, use_unicode=False, wrap_line=False)


def upretty(expr, order=None):
    """Unicode pretty-printing"""
    return xpretty(expr, order=order, use_unicode=True, wrap_line=False)


def test_pretty_ascii_str():
    assert pretty( 'xxx' ) == 'xxx'
    assert pretty( "xxx" ) == 'xxx'
    assert pretty( 'xxx\'xxx' ) == 'xxx\'xxx'
    assert pretty( 'xxx"xxx' ) == 'xxx\"xxx'
    assert pretty( 'xxx\"xxx' ) == 'xxx\"xxx'
    assert pretty( "xxx'xxx" ) == 'xxx\'xxx'
    assert pretty( "xxx\'xxx" ) == 'xxx\'xxx'
    assert pretty( "xxx\"xxx" ) == 'xxx\"xxx'
    assert pretty( "xxx\"xxx\'xxx" ) == 'xxx"xxx\'xxx'
    assert pretty( "xxx\nxxx" ) == 'xxx\nxxx'


def test_pretty_unicode_str():
    assert pretty( 'xxx' ) == 'xxx'
    assert pretty( 'xxx' ) == 'xxx'
    assert pretty( 'xxx\'xxx' ) == 'xxx\'xxx'
    assert pretty( 'xxx"xxx' ) == 'xxx\"xxx'
    assert pretty( 'xxx\"xxx' ) == 'xxx\"xxx'
    assert pretty( "xxx'xxx" ) == 'xxx\'xxx'
    assert pretty( "xxx\'xxx" ) == 'xxx\'xxx'
    assert pretty( "xxx\"xxx" ) == 'xxx\"xxx'
    assert pretty( "xxx\"xxx\'xxx" ) == 'xxx"xxx\'xxx'
    assert pretty( "xxx\nxxx" ) == 'xxx\nxxx'


def test_upretty_greek():
    assert upretty( oo ) == '∞'
    assert upretty( Symbol('alpha^+_1') ) == 'α⁺₁'
    assert upretty( Symbol('beta') ) == 'β'
    assert upretty(Symbol('lambda')) == 'λ'


def test_upretty_multiindex():
    assert upretty( Symbol('beta12') ) == 'β₁₂'
    assert upretty( Symbol('Y00') ) == 'Y₀₀'
    assert upretty( Symbol('Y_00') ) == 'Y₀₀'
    assert upretty( Symbol('F^+-') ) == 'F⁺⁻'


def test_upretty_sub_super():
    assert upretty( Symbol('beta_1_2') ) == 'β₁ ₂'
    assert upretty( Symbol('beta^1^2') ) == 'β¹ ²'
    assert upretty( Symbol('beta_1^2') ) == 'β²₁'
    assert upretty( Symbol('beta_10_20') ) == 'β₁₀ ₂₀'
    assert upretty( Symbol('beta_ax_gamma^i') ) == 'βⁱₐₓ ᵧ'
    assert upretty( Symbol("F^1^2_3_4") ) == 'F¹ ²₃ ₄'
    assert upretty( Symbol("F_1_2^3^4") ) == 'F³ ⁴₁ ₂'
    assert upretty( Symbol("F_1_2_3_4") ) == 'F₁ ₂ ₃ ₄'
    assert upretty( Symbol("F^1^2^3^4") ) == 'F¹ ² ³ ⁴'


def test_upretty_subs_missing_in_24():
    assert upretty( Symbol('F_beta') ) == 'Fᵦ'
    assert upretty( Symbol('F_gamma') ) == 'Fᵧ'
    assert upretty( Symbol('F_rho') ) == 'Fᵨ'
    assert upretty( Symbol('F_phi') ) == 'Fᵩ'
    assert upretty( Symbol('F_chi') ) == 'Fᵪ'

    assert upretty( Symbol('F_a') ) == 'Fₐ'
    assert upretty( Symbol('F_e') ) == 'Fₑ'
    assert upretty( Symbol('F_i') ) == 'Fᵢ'
    assert upretty( Symbol('F_o') ) == 'Fₒ'
    assert upretty( Symbol('F_u') ) == 'Fᵤ'
    assert upretty( Symbol('F_r') ) == 'Fᵣ'
    assert upretty( Symbol('F_v') ) == 'Fᵥ'
    assert upretty( Symbol('F_x') ) == 'Fₓ'


def test_missing_in_2X_issue_9047():
    assert upretty( Symbol('F_h') ) == 'Fₕ'
    assert upretty( Symbol('F_k') ) == 'Fₖ'
    assert upretty( Symbol('F_l') ) == 'Fₗ'
    assert upretty( Symbol('F_m') ) == 'Fₘ'
    assert upretty( Symbol('F_n') ) == 'Fₙ'
    assert upretty( Symbol('F_p') ) == 'Fₚ'
    assert upretty( Symbol('F_s') ) == 'Fₛ'
    assert upretty( Symbol('F_t') ) == 'Fₜ'


def test_upretty_modifiers():
    # Accents
    assert upretty( Symbol('Fmathring') ) == 'F̊'
    assert upretty( Symbol('Fddddot') ) == 'F⃜'
    assert upretty( Symbol('Fdddot') ) == 'F⃛'
    assert upretty( Symbol('Fddot') ) == 'F̈'
    assert upretty( Symbol('Fdot') ) == 'Ḟ'
    assert upretty( Symbol('Fcheck') ) == 'F̌'
    assert upretty( Symbol('Fbreve') ) == 'F̆'
    assert upretty( Symbol('Facute') ) == 'F́'
    assert upretty( Symbol('Fgrave') ) == 'F̀'
    assert upretty( Symbol('Ftilde') ) == 'F̃'
    assert upretty( Symbol('Fhat') ) == 'F̂'
    assert upretty( Symbol('Fbar') ) == 'F̅'
    assert upretty( Symbol('Fvec') ) == 'F⃗'
    assert upretty( Symbol('Fprime') ) == 'F′'
    assert upretty( Symbol('Fprm') ) == 'F′'
    # No faces are actually implemented, but test to make sure the modifiers are stripped
    assert upretty( Symbol('Fbold') ) == 'Fbold'
    assert upretty( Symbol('Fbm') ) == 'Fbm'
    assert upretty( Symbol('Fcal') ) == 'Fcal'
    assert upretty( Symbol('Fscr') ) == 'Fscr'
    assert upretty( Symbol('Ffrak') ) == 'Ffrak'
    # Brackets
    assert upretty( Symbol('Fnorm') ) == '‖F‖'
    assert upretty( Symbol('Favg') ) == '⟨F⟩'
    assert upretty( Symbol('Fabs') ) == '|F|'
    assert upretty( Symbol('Fmag') ) == '|F|'
    # Combinations
    assert upretty( Symbol('xvecdot') ) == 'x⃗̇'
    assert upretty( Symbol('xDotVec') ) == 'ẋ⃗'
    assert upretty( Symbol('xHATNorm') ) == '‖x̂‖'
    assert upretty( Symbol('xMathring_yCheckPRM__zbreveAbs') ) == 'x̊_y̌′__|z̆|'
    assert upretty( Symbol('alphadothat_nVECDOT__tTildePrime') ) == 'α̇̂_n⃗̇__t̃′'
    assert upretty( Symbol('x_dot') ) == 'x_dot'
    assert upretty( Symbol('x__dot') ) == 'x__dot'


def test_pretty_Cycle():
    from sympy.combinatorics.permutations import Cycle
    assert pretty(Cycle(1, 2)) == '(1 2)'
    assert pretty(Cycle(2)) == '(2)'
    assert pretty(Cycle(1, 3)(4, 5)) == '(1 3)(4 5)'
    assert pretty(Cycle()) == '()'


def test_pretty_Permutation():
    from sympy.combinatorics.permutations import Permutation
    p1 = Permutation(1, 2)(3, 4)
    assert xpretty(p1, perm_cyclic=True, use_unicode=True) == "(1 2)(3 4)"
    assert xpretty(p1, perm_cyclic=True, use_unicode=False) == "(1 2)(3 4)"
    assert xpretty(p1, perm_cyclic=False, use_unicode=True) == \
    '⎛0 1 2 3 4⎞\n'\
    '⎝0 2 1 4 3⎠'
    assert xpretty(p1, perm_cyclic=False, use_unicode=False) == \
    "/0 1 2 3 4\\\n"\
    "\\0 2 1 4 3/"

    with warns_deprecated_sympy():
        old_print_cyclic = Permutation.print_cyclic
        Permutation.print_cyclic = False
        assert xpretty(p1, use_unicode=True) == \
        '⎛0 1 2 3 4⎞\n'\
        '⎝0 2 1 4 3⎠'
        assert xpretty(p1, use_unicode=False) == \
        "/0 1 2 3 4\\\n"\
        "\\0 2 1 4 3/"
        Permutation.print_cyclic = old_print_cyclic


def test_pretty_basic():
    assert pretty( -Rational(1)/2 ) == '-1/2'
    assert pretty( -Rational(13)/22 ) == \
"""\
-13 \n\
----\n\
 22 \
"""
    expr = oo
    ascii_str = \
"""\
oo\
"""
    ucode_str = \
"""\
∞\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (x**2)
    ascii_str = \
"""\
 2\n\
x \
"""
    ucode_str = \
"""\
 2\n\
x \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = 1/x
    ascii_str = \
"""\
1\n\
-\n\
x\
"""
    ucode_str = \
"""\
1\n\
─\n\
x\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    # not the same as 1/x
    expr = x**-1.0
    ascii_str = \
"""\
 -1.0\n\
x    \
"""
    ucode_str = \
"""\
 -1.0\n\
x    \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    # see issue #2860
    expr = Pow(S(2), -1.0, evaluate=False)
    ascii_str = \
"""\
 -1.0\n\
2    \
"""
    ucode_str = \
"""\
 -1.0\n\
2    \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = y*x**-2
    ascii_str = \
"""\
y \n\
--\n\
 2\n\
x \
"""
    ucode_str = \
"""\
y \n\
──\n\
 2\n\
x \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    #see issue #14033
    expr = x**Rational(1, 3)
    ascii_str = \
"""\
 1/3\n\
x   \
"""
    ucode_str = \
"""\
 1/3\n\
x   \
"""
    assert xpretty(expr, use_unicode=False, wrap_line=False,\
    root_notation = False) == ascii_str
    assert xpretty(expr, use_unicode=True, wrap_line=False,\
    root_notation = False) == ucode_str

    expr = x**Rational(-5, 2)
    ascii_str = \
"""\
 1  \n\
----\n\
 5/2\n\
x   \
"""
    ucode_str = \
"""\
 1  \n\
────\n\
 5/2\n\
x   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (-2)**x
    ascii_str = \
"""\
    x\n\
(-2) \
"""
    ucode_str = \
"""\
    x\n\
(-2) \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    # See issue 4923
    expr = Pow(3, 1, evaluate=False)
    ascii_str = \
"""\
 1\n\
3 \
"""
    ucode_str = \
"""\
 1\n\
3 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (x**2 + x + 1)
    ascii_str_1 = \
"""\
         2\n\
1 + x + x \
"""
    ascii_str_2 = \
"""\
 2        \n\
x  + x + 1\
"""
    ascii_str_3 = \
"""\
 2        \n\
x  + 1 + x\
"""
    ucode_str_1 = \
"""\
         2\n\
1 + x + x \
"""
    ucode_str_2 = \
"""\
 2        \n\
x  + x + 1\
"""
    ucode_str_3 = \
"""\
 2        \n\
x  + 1 + x\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2, ascii_str_3]
    assert upretty(expr) in [ucode_str_1, ucode_str_2, ucode_str_3]

    expr = 1 - x
    ascii_str_1 = \
"""\
1 - x\
"""
    ascii_str_2 = \
"""\
-x + 1\
"""
    ucode_str_1 = \
"""\
1 - x\
"""
    ucode_str_2 = \
"""\
-x + 1\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = 1 - 2*x
    ascii_str_1 = \
"""\
1 - 2*x\
"""
    ascii_str_2 = \
"""\
-2*x + 1\
"""
    ucode_str_1 = \
"""\
1 - 2⋅x\
"""
    ucode_str_2 = \
"""\
-2⋅x + 1\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = x/y
    ascii_str = \
"""\
x\n\
-\n\
y\
"""
    ucode_str = \
"""\
x\n\
─\n\
y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = -x/y
    ascii_str = \
"""\
-x \n\
---\n\
 y \
"""
    ucode_str = \
"""\
-x \n\
───\n\
 y \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (x + 2)/y
    ascii_str_1 = \
"""\
2 + x\n\
-----\n\
  y  \
"""
    ascii_str_2 = \
"""\
x + 2\n\
-----\n\
  y  \
"""
    ucode_str_1 = \
"""\
2 + x\n\
─────\n\
  y  \
"""
    ucode_str_2 = \
"""\
x + 2\n\
─────\n\
  y  \
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = (1 + x)*y
    ascii_str_1 = \
"""\
y*(1 + x)\
"""
    ascii_str_2 = \
"""\
(1 + x)*y\
"""
    ascii_str_3 = \
"""\
y*(x + 1)\
"""
    ucode_str_1 = \
"""\
y⋅(1 + x)\
"""
    ucode_str_2 = \
"""\
(1 + x)⋅y\
"""
    ucode_str_3 = \
"""\
y⋅(x + 1)\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2, ascii_str_3]
    assert upretty(expr) in [ucode_str_1, ucode_str_2, ucode_str_3]

    # Test for correct placement of the negative sign
    expr = -5*x/(x + 10)
    ascii_str_1 = \
"""\
-5*x  \n\
------\n\
10 + x\
"""
    ascii_str_2 = \
"""\
-5*x  \n\
------\n\
x + 10\
"""
    ucode_str_1 = \
"""\
-5⋅x  \n\
──────\n\
10 + x\
"""
    ucode_str_2 = \
"""\
-5⋅x  \n\
──────\n\
x + 10\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = -S.Half - 3*x
    ascii_str = \
"""\
-3*x - 1/2\
"""
    ucode_str = \
"""\
-3⋅x - 1/2\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = S.Half - 3*x
    ascii_str = \
"""\
1/2 - 3*x\
"""
    ucode_str = \
"""\
1/2 - 3⋅x\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = -S.Half - 3*x/2
    ascii_str = \
"""\
  3*x   1\n\
- --- - -\n\
   2    2\
"""
    ucode_str = \
"""\
  3⋅x   1\n\
- ─── - ─\n\
   2    2\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = S.Half - 3*x/2
    ascii_str = \
"""\
1   3*x\n\
- - ---\n\
2    2 \
"""
    ucode_str = \
"""\
1   3⋅x\n\
─ - ───\n\
2    2 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_negative_fractions():
    expr = -x/y
    ascii_str =\
"""\
-x \n\
---\n\
 y \
"""
    ucode_str =\
"""\
-x \n\
───\n\
 y \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = -x*z/y
    ascii_str =\
"""\
-x*z \n\
-----\n\
  y  \
"""
    ucode_str =\
"""\
-x⋅z \n\
─────\n\
  y  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = x**2/y
    ascii_str =\
"""\
 2\n\
x \n\
--\n\
y \
"""
    ucode_str =\
"""\
 2\n\
x \n\
──\n\
y \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = -x**2/y
    ascii_str =\
"""\
  2 \n\
-x  \n\
----\n\
 y  \
"""
    ucode_str =\
"""\
  2 \n\
-x  \n\
────\n\
 y  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = -x/(y*z)
    ascii_str =\
"""\
-x \n\
---\n\
y*z\
"""
    ucode_str =\
"""\
-x \n\
───\n\
y⋅z\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = -a/y**2
    ascii_str =\
"""\
-a \n\
---\n\
 2 \n\
y  \
"""
    ucode_str =\
"""\
-a \n\
───\n\
 2 \n\
y  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = y**(-a/b)
    ascii_str =\
"""\
 -a \n\
 ---\n\
  b \n\
y   \
"""
    ucode_str =\
"""\
 -a \n\
 ───\n\
  b \n\
y   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = -1/y**2
    ascii_str =\
"""\
-1 \n\
---\n\
 2 \n\
y  \
"""
    ucode_str =\
"""\
-1 \n\
───\n\
 2 \n\
y  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = -10/b**2
    ascii_str =\
"""\
-10 \n\
----\n\
  2 \n\
 b  \
"""
    ucode_str =\
"""\
-10 \n\
────\n\
  2 \n\
 b  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str
    expr = Rational(-200, 37)
    ascii_str =\
"""\
-200 \n\
-----\n\
 37  \
"""
    ucode_str =\
"""\
-200 \n\
─────\n\
 37  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_Mul():
    expr = Mul(0, 1, evaluate=False)
    assert pretty(expr) == "0*1"
    assert upretty(expr) == "0⋅1"
    expr = Mul(1, 0, evaluate=False)
    assert pretty(expr) == "1*0"
    assert upretty(expr) == "1⋅0"
    expr = Mul(1, 1, evaluate=False)
    assert pretty(expr) == "1*1"
    assert upretty(expr) == "1⋅1"
    expr = Mul(1, 1, 1, evaluate=False)
    assert pretty(expr) == "1*1*1"
    assert upretty(expr) == "1⋅1⋅1"
    expr = Mul(1, 2, evaluate=False)
    assert pretty(expr) == "1*2"
    assert upretty(expr) == "1⋅2"
    expr = Add(0, 1, evaluate=False)
    assert pretty(expr) == "0 + 1"
    assert upretty(expr) == "0 + 1"
    expr = Mul(1, 1, 2, evaluate=False)
    assert pretty(expr) == "1*1*2"
    assert upretty(expr) == "1⋅1⋅2"
    expr = Add(0, 0, 1, evaluate=False)
    assert pretty(expr) == "0 + 0 + 1"
    assert upretty(expr) == "0 + 0 + 1"
    expr = Mul(1, -1, evaluate=False)
    assert pretty(expr) == "1*-1"
    assert upretty(expr) == "1⋅-1"
    expr = Mul(1.0, x, evaluate=False)
    assert pretty(expr) == "1.0*x"
    assert upretty(expr) == "1.0⋅x"
    expr = Mul(1, 1, 2, 3, x, evaluate=False)
    assert pretty(expr) == "1*1*2*3*x"
    assert upretty(expr) == "1⋅1⋅2⋅3⋅x"
    expr = Mul(-1, 1, evaluate=False)
    assert pretty(expr) == "-1*1"
    assert upretty(expr) == "-1⋅1"
    expr = Mul(4, 3, 2, 1, 0, y, x, evaluate=False)
    assert pretty(expr) == "4*3*2*1*0*y*x"
    assert upretty(expr) == "4⋅3⋅2⋅1⋅0⋅y⋅x"
    expr = Mul(4, 3, 2, 1+z, 0, y, x, evaluate=False)
    assert pretty(expr) == "4*3*2*(z + 1)*0*y*x"
    assert upretty(expr) == "4⋅3⋅2⋅(z + 1)⋅0⋅y⋅x"
    expr = Mul(Rational(2, 3), Rational(5, 7), evaluate=False)
    assert pretty(expr) == "2/3*5/7"
    assert upretty(expr) == "2/3⋅5/7"
    expr = Mul(x + y, Rational(1, 2), evaluate=False)
    assert pretty(expr) == "(x + y)*1/2"
    assert upretty(expr) == "(x + y)⋅1/2"
    expr = Mul(Rational(1, 2), x + y, evaluate=False)
    assert pretty(expr) == "x + y\n-----\n  2  "
    assert upretty(expr) == "x + y\n─────\n  2  "
    expr = Mul(S.One, x + y, evaluate=False)
    assert pretty(expr) == "1*(x + y)"
    assert upretty(expr) == "1⋅(x + y)"
    expr = Mul(x - y, S.One, evaluate=False)
    assert pretty(expr) == "(x - y)*1"
    assert upretty(expr) == "(x - y)⋅1"
    expr = Mul(Rational(1, 2), x - y, S.One, x + y, evaluate=False)
    assert pretty(expr) == "1/2*(x - y)*1*(x + y)"
    assert upretty(expr) == "1/2⋅(x - y)⋅1⋅(x + y)"
    expr = Mul(x + y, Rational(3, 4), S.One, y - z, evaluate=False)
    assert pretty(expr) == "(x + y)*3/4*1*(y - z)"
    assert upretty(expr) == "(x + y)⋅3/4⋅1⋅(y - z)"
    expr = Mul(x + y, Rational(1, 1), Rational(3, 4), Rational(5, 6),evaluate=False)
    assert pretty(expr) == "(x + y)*1*3/4*5/6"
    assert upretty(expr) == "(x + y)⋅1⋅3/4⋅5/6"
    expr = Mul(Rational(3, 4), x + y, S.One, y - z, evaluate=False)
    assert pretty(expr) == "3/4*(x + y)*1*(y - z)"
    assert upretty(expr) == "3/4⋅(x + y)⋅1⋅(y - z)"


def test_issue_5524():
    assert pretty(-(-x + 5)*(-x - 2*sqrt(2) + 5) - (-y + 5)*(-y + 5)) == \
"""\
         2           /         ___    \\\n\
- (5 - y)  + (x - 5)*\\-x - 2*\\/ 2  + 5/\
"""

    assert upretty(-(-x + 5)*(-x - 2*sqrt(2) + 5) - (-y + 5)*(-y + 5)) == \
"""\
         2                          \n\
- (5 - y)  + (x - 5)⋅(-x - 2⋅√2 + 5)\
"""


def test_pretty_ordering():
    assert pretty(x**2 + x + 1, order='lex') == \
"""\
 2        \n\
x  + x + 1\
"""
    assert pretty(x**2 + x + 1, order='rev-lex') == \
"""\
         2\n\
1 + x + x \
"""
    assert pretty(1 - x, order='lex') == '-x + 1'
    assert pretty(1 - x, order='rev-lex') == '1 - x'

    assert pretty(1 - 2*x, order='lex') == '-2*x + 1'
    assert pretty(1 - 2*x, order='rev-lex') == '1 - 2*x'

    f = 2*x**4 + y**2 - x**2 + y**3
    assert pretty(f, order=None) == \
"""\
   4    2    3    2\n\
2*x  - x  + y  + y \
"""
    assert pretty(f, order='lex') == \
"""\
   4    2    3    2\n\
2*x  - x  + y  + y \
"""
    assert pretty(f, order='rev-lex') == \
"""\
 2    3    2      4\n\
y  + y  - x  + 2*x \
"""

    expr = x - x**3/6 + x**5/120 + O(x**6)
    ascii_str = \
"""\
     3    5         \n\
    x    x      / 6\\\n\
x - -- + --- + O\\x /\n\
    6    120        \
"""
    ucode_str = \
"""\
     3    5         \n\
    x    x      ⎛ 6⎞\n\
x - ── + ─── + O⎝x ⎠\n\
    6    120        \
"""
    assert pretty(expr, order=None) == ascii_str
    assert upretty(expr, order=None) == ucode_str

    assert pretty(expr, order='lex') == ascii_str
    assert upretty(expr, order='lex') == ucode_str

    assert pretty(expr, order='rev-lex') == ascii_str
    assert upretty(expr, order='rev-lex') == ucode_str


def test_EulerGamma():
    assert pretty(EulerGamma) == str(EulerGamma) == "EulerGamma"
    assert upretty(EulerGamma) == "γ"


def test_GoldenRatio():
    assert pretty(GoldenRatio) == str(GoldenRatio) == "GoldenRatio"
    assert upretty(GoldenRatio) == "φ"


def test_Catalan():
    assert pretty(Catalan) == upretty(Catalan) == "G"


def test_pretty_relational():
    expr = Eq(x, y)
    ascii_str = \
"""\
x = y\
"""
    ucode_str = \
"""\
x = y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Lt(x, y)
    ascii_str = \
"""\
x < y\
"""
    ucode_str = \
"""\
x < y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Gt(x, y)
    ascii_str = \
"""\
x > y\
"""
    ucode_str = \
"""\
x > y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Le(x, y)
    ascii_str = \
"""\
x <= y\
"""
    ucode_str = \
"""\
x ≤ y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Ge(x, y)
    ascii_str = \
"""\
x >= y\
"""
    ucode_str = \
"""\
x ≥ y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Ne(x/(y + 1), y**2)
    ascii_str_1 = \
"""\
  x       2\n\
----- != y \n\
1 + y      \
"""
    ascii_str_2 = \
"""\
  x       2\n\
----- != y \n\
y + 1      \
"""
    ucode_str_1 = \
"""\
  x      2\n\
───── ≠ y \n\
1 + y     \
"""
    ucode_str_2 = \
"""\
  x      2\n\
───── ≠ y \n\
y + 1     \
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]


def test_Assignment():
    expr = Assignment(x, y)
    ascii_str = \
"""\
x := y\
"""
    ucode_str = \
"""\
x := y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_AugmentedAssignment():
    expr = AddAugmentedAssignment(x, y)
    ascii_str = \
"""\
x += y\
"""
    ucode_str = \
"""\
x += y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = SubAugmentedAssignment(x, y)
    ascii_str = \
"""\
x -= y\
"""
    ucode_str = \
"""\
x -= y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = MulAugmentedAssignment(x, y)
    ascii_str = \
"""\
x *= y\
"""
    ucode_str = \
"""\
x *= y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = DivAugmentedAssignment(x, y)
    ascii_str = \
"""\
x /= y\
"""
    ucode_str = \
"""\
x /= y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = ModAugmentedAssignment(x, y)
    ascii_str = \
"""\
x %= y\
"""
    ucode_str = \
"""\
x %= y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_rational():
    expr = y*x**-2
    ascii_str = \
"""\
y \n\
--\n\
 2\n\
x \
"""
    ucode_str = \
"""\
y \n\
──\n\
 2\n\
x \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = y**Rational(3, 2) * x**Rational(-5, 2)
    ascii_str = \
"""\
 3/2\n\
y   \n\
----\n\
 5/2\n\
x   \
"""
    ucode_str = \
"""\
 3/2\n\
y   \n\
────\n\
 5/2\n\
x   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = sin(x)**3/tan(x)**2
    ascii_str = \
"""\
   3   \n\
sin (x)\n\
-------\n\
   2   \n\
tan (x)\
"""
    ucode_str = \
"""\
   3   \n\
sin (x)\n\
───────\n\
   2   \n\
tan (x)\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


@_both_exp_pow
def test_pretty_functions():
    """Tests for Abs, conjugate, exp, function braces, and factorial."""
    expr = (2*x + exp(x))
    ascii_str_1 = \
"""\
       x\n\
2*x + e \
"""
    ascii_str_2 = \
"""\
 x      \n\
e  + 2*x\
"""
    ucode_str_1 = \
"""\
       x\n\
2⋅x + ℯ \
"""
    ucode_str_2 = \
"""\
 x     \n\
ℯ + 2⋅x\
"""
    ucode_str_3 = \
"""\
 x      \n\
ℯ  + 2⋅x\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2, ucode_str_3]

    expr = Abs(x)
    ascii_str = \
"""\
|x|\
"""
    ucode_str = \
"""\
│x│\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Abs(x/(x**2 + 1))
    ascii_str_1 = \
"""\
|  x   |\n\
|------|\n\
|     2|\n\
|1 + x |\
"""
    ascii_str_2 = \
"""\
|  x   |\n\
|------|\n\
| 2    |\n\
|x  + 1|\
"""
    ucode_str_1 = \
"""\
│  x   │\n\
│──────│\n\
│     2│\n\
│1 + x │\
"""
    ucode_str_2 = \
"""\
│  x   │\n\
│──────│\n\
│ 2    │\n\
│x  + 1│\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = Abs(1 / (y - Abs(x)))
    ascii_str = \
"""\
    1    \n\
---------\n\
|y - |x||\
"""
    ucode_str = \
"""\
    1    \n\
─────────\n\
│y - │x││\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    n = Symbol('n', integer=True)
    expr = factorial(n)
    ascii_str = \
"""\
n!\
"""
    ucode_str = \
"""\
n!\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = factorial(2*n)
    ascii_str = \
"""\
(2*n)!\
"""
    ucode_str = \
"""\
(2⋅n)!\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = factorial(factorial(factorial(n)))
    ascii_str = \
"""\
((n!)!)!\
"""
    ucode_str = \
"""\
((n!)!)!\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = factorial(n + 1)
    ascii_str_1 = \
"""\
(1 + n)!\
"""
    ascii_str_2 = \
"""\
(n + 1)!\
"""
    ucode_str_1 = \
"""\
(1 + n)!\
"""
    ucode_str_2 = \
"""\
(n + 1)!\
"""

    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = subfactorial(n)
    ascii_str = \
"""\
!n\
"""
    ucode_str = \
"""\
!n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = subfactorial(2*n)
    ascii_str = \
"""\
!(2*n)\
"""
    ucode_str = \
"""\
!(2⋅n)\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    n = Symbol('n', integer=True)
    expr = factorial2(n)
    ascii_str = \
"""\
n!!\
"""
    ucode_str = \
"""\
n!!\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = factorial2(2*n)
    ascii_str = \
"""\
(2*n)!!\
"""
    ucode_str = \
"""\
(2⋅n)!!\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = factorial2(factorial2(factorial2(n)))
    ascii_str = \
"""\
((n!!)!!)!!\
"""
    ucode_str = \
"""\
((n!!)!!)!!\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = factorial2(n + 1)
    ascii_str_1 = \
"""\
(1 + n)!!\
"""
    ascii_str_2 = \
"""\
(n + 1)!!\
"""
    ucode_str_1 = \
"""\
(1 + n)!!\
"""
    ucode_str_2 = \
"""\
(n + 1)!!\
"""

    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = 2*binomial(n, k)
    ascii_str = \
"""\
  /n\\\n\
2*| |\n\
  \\k/\
"""
    ucode_str = \
"""\
  ⎛n⎞\n\
2⋅⎜ ⎟\n\
  ⎝k⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = 2*binomial(2*n, k)
    ascii_str = \
"""\
  /2*n\\\n\
2*|   |\n\
  \\ k /\
"""
    ucode_str = \
"""\
  ⎛2⋅n⎞\n\
2⋅⎜   ⎟\n\
  ⎝ k ⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = 2*binomial(n**2, k)
    ascii_str = \
"""\
  / 2\\\n\
  |n |\n\
2*|  |\n\
  \\k /\
"""
    ucode_str = \
"""\
  ⎛ 2⎞\n\
  ⎜n ⎟\n\
2⋅⎜  ⎟\n\
  ⎝k ⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = catalan(n)
    ascii_str = \
"""\
C \n\
 n\
"""
    ucode_str = \
"""\
C \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = catalan(n)
    ascii_str = \
"""\
C \n\
 n\
"""
    ucode_str = \
"""\
C \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = bell(n)
    ascii_str = \
"""\
B \n\
 n\
"""
    ucode_str = \
"""\
B \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = bernoulli(n)
    ascii_str = \
"""\
B \n\
 n\
"""
    ucode_str = \
"""\
B \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = bernoulli(n, x)
    ascii_str = \
"""\
B (x)\n\
 n   \
"""
    ucode_str = \
"""\
B (x)\n\
 n   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = fibonacci(n)
    ascii_str = \
"""\
F \n\
 n\
"""
    ucode_str = \
"""\
F \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = lucas(n)
    ascii_str = \
"""\
L \n\
 n\
"""
    ucode_str = \
"""\
L \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = tribonacci(n)
    ascii_str = \
"""\
T \n\
 n\
"""
    ucode_str = \
"""\
T \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = stieltjes(n)
    ascii_str = \
"""\
stieltjes \n\
         n\
"""
    ucode_str = \
"""\
γ \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = stieltjes(n, x)
    ascii_str = \
"""\
stieltjes (x)\n\
         n   \
"""
    ucode_str = \
"""\
γ (x)\n\
 n   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = mathieuc(x, y, z)
    ascii_str = 'C(x, y, z)'
    ucode_str = 'C(x, y, z)'
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = mathieus(x, y, z)
    ascii_str = 'S(x, y, z)'
    ucode_str = 'S(x, y, z)'
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = mathieucprime(x, y, z)
    ascii_str = "C'(x, y, z)"
    ucode_str = "C'(x, y, z)"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = mathieusprime(x, y, z)
    ascii_str = "S'(x, y, z)"
    ucode_str = "S'(x, y, z)"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = conjugate(x)
    ascii_str = \
"""\
_\n\
x\
"""
    ucode_str = \
"""\
_\n\
x\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    f = Function('f')
    expr = conjugate(f(x + 1))
    ascii_str_1 = \
"""\
________\n\
f(1 + x)\
"""
    ascii_str_2 = \
"""\
________\n\
f(x + 1)\
"""
    ucode_str_1 = \
"""\
________\n\
f(1 + x)\
"""
    ucode_str_2 = \
"""\
________\n\
f(x + 1)\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = f(x)
    ascii_str = \
"""\
f(x)\
"""
    ucode_str = \
"""\
f(x)\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = f(x, y)
    ascii_str = \
"""\
f(x, y)\
"""
    ucode_str = \
"""\
f(x, y)\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = f(x/(y + 1), y)
    ascii_str_1 = \
"""\
 /  x     \\\n\
f|-----, y|\n\
 \\1 + y   /\
"""
    ascii_str_2 = \
"""\
 /  x     \\\n\
f|-----, y|\n\
 \\y + 1   /\
"""
    ucode_str_1 = \
"""\
 ⎛  x     ⎞\n\
f⎜─────, y⎟\n\
 ⎝1 + y   ⎠\
"""
    ucode_str_2 = \
"""\
 ⎛  x     ⎞\n\
f⎜─────, y⎟\n\
 ⎝y + 1   ⎠\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = f(x**x**x**x**x**x)
    ascii_str = \
"""\
 / / / / / x\\\\\\\\\\
 | | | | \\x /||||
 | | | \\x    /|||
 | | \\x       /||
 | \\x          /|
f\\x             /\
"""
    ucode_str = \
"""\
 ⎛ ⎛ ⎛ ⎛ ⎛ x⎞⎞⎞⎞⎞
 ⎜ ⎜ ⎜ ⎜ ⎝x ⎠⎟⎟⎟⎟
 ⎜ ⎜ ⎜ ⎝x    ⎠⎟⎟⎟
 ⎜ ⎜ ⎝x       ⎠⎟⎟
 ⎜ ⎝x          ⎠⎟
f⎝x             ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = sin(x)**2
    ascii_str = \
"""\
   2   \n\
sin (x)\
"""
    ucode_str = \
"""\
   2   \n\
sin (x)\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = conjugate(a + b*I)
    ascii_str = \
"""\
_     _\n\
a - I*b\
"""
    ucode_str = \
"""\
_     _\n\
a - ⅈ⋅b\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = conjugate(exp(a + b*I))
    ascii_str = \
"""\
 _     _\n\
 a - I*b\n\
e       \
"""
    ucode_str = \
"""\
 _     _\n\
 a - ⅈ⋅b\n\
ℯ       \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = conjugate( f(1 + conjugate(f(x))) )
    ascii_str_1 = \
"""\
___________\n\
 /    ____\\\n\
f\\1 + f(x)/\
"""
    ascii_str_2 = \
"""\
___________\n\
 /____    \\\n\
f\\f(x) + 1/\
"""
    ucode_str_1 = \
"""\
___________\n\
 ⎛    ____⎞\n\
f⎝1 + f(x)⎠\
"""
    ucode_str_2 = \
"""\
___________\n\
 ⎛____    ⎞\n\
f⎝f(x) + 1⎠\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = f(x/(y + 1), y)
    ascii_str_1 = \
"""\
 /  x     \\\n\
f|-----, y|\n\
 \\1 + y   /\
"""
    ascii_str_2 = \
"""\
 /  x     \\\n\
f|-----, y|\n\
 \\y + 1   /\
"""
    ucode_str_1 = \
"""\
 ⎛  x     ⎞\n\
f⎜─────, y⎟\n\
 ⎝1 + y   ⎠\
"""
    ucode_str_2 = \
"""\
 ⎛  x     ⎞\n\
f⎜─────, y⎟\n\
 ⎝y + 1   ⎠\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = floor(1 / (y - floor(x)))
    ascii_str = \
"""\
     /     1      \\\n\
floor|------------|\n\
     \\y - floor(x)/\
"""
    ucode_str = \
"""\
⎢   1   ⎥\n\
⎢───────⎥\n\
⎣y - ⌊x⌋⎦\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = ceiling(1 / (y - ceiling(x)))
    ascii_str = \
"""\
       /      1       \\\n\
ceiling|--------------|\n\
       \\y - ceiling(x)/\
"""
    ucode_str = \
"""\
⎡   1   ⎤\n\
⎢───────⎥\n\
⎢y - ⌈x⌉⎥\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = euler(n)
    ascii_str = \
"""\
E \n\
 n\
"""
    ucode_str = \
"""\
E \n\
 n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = euler(1/(1 + 1/(1 + 1/n)))
    ascii_str = \
"""\
E         \n\
     1    \n\
 ---------\n\
       1  \n\
 1 + -----\n\
         1\n\
     1 + -\n\
         n\
"""

    ucode_str = \
"""\
E         \n\
     1    \n\
 ─────────\n\
       1  \n\
 1 + ─────\n\
         1\n\
     1 + ─\n\
         n\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = euler(n, x)
    ascii_str = \
"""\
E (x)\n\
 n   \
"""
    ucode_str = \
"""\
E (x)\n\
 n   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = euler(n, x/2)
    ascii_str = \
"""\
  /x\\\n\
E |-|\n\
 n\\2/\
"""
    ucode_str = \
"""\
  ⎛x⎞\n\
E ⎜─⎟\n\
 n⎝2⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_sqrt():
    expr = sqrt(2)
    ascii_str = \
"""\
  ___\n\
\\/ 2 \
"""
    ucode_str = \
"√2"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = 2**Rational(1, 3)
    ascii_str = \
"""\
3 ___\n\
\\/ 2 \
"""
    ucode_str = \
"""\
3 ___\n\
╲╱ 2 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = 2**Rational(1, 1000)
    ascii_str = \
"""\
1000___\n\
  \\/ 2 \
"""
    ucode_str = \
"""\
1000___\n\
  ╲╱ 2 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = sqrt(x**2 + 1)
    ascii_str = \
"""\
   ________\n\
  /  2     \n\
\\/  x  + 1 \
"""
    ucode_str = \
"""\
   ________\n\
  ╱  2     \n\
╲╱  x  + 1 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (1 + sqrt(5))**Rational(1, 3)
    ascii_str = \
"""\
   ___________\n\
3 /       ___ \n\
\\/  1 + \\/ 5  \
"""
    ucode_str = \
"""\
3 ________\n\
╲╱ 1 + √5 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = 2**(1/x)
    ascii_str = \
"""\
x ___\n\
\\/ 2 \
"""
    ucode_str = \
"""\
x ___\n\
╲╱ 2 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = sqrt(2 + pi)
    ascii_str = \
"""\
  ________\n\
\\/ 2 + pi \
"""
    ucode_str = \
"""\
  _______\n\
╲╱ 2 + π \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (2 + (
        1 + x**2)/(2 + x))**Rational(1, 4) + (1 + x**Rational(1, 1000))/sqrt(3 + x**2)
    ascii_str = \
"""\
     ____________              \n\
    /      2        1000___    \n\
   /      x  + 1      \\/ x  + 1\n\
4 /   2 + ------  + -----------\n\
\\/        x + 2        ________\n\
                      /  2     \n\
                    \\/  x  + 3 \
"""
    ucode_str = \
"""\
     ____________              \n\
    ╱      2        1000___    \n\
   ╱      x  + 1      ╲╱ x  + 1\n\
4 ╱   2 + ──────  + ───────────\n\
╲╱        x + 2        ________\n\
                      ╱  2     \n\
                    ╲╱  x  + 3 \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_sqrt_char_knob():
    # See PR #9234.
    expr = sqrt(2)
    ucode_str1 = \
"""\
  ___\n\
╲╱ 2 \
"""
    ucode_str2 = \
"√2"
    assert xpretty(expr, use_unicode=True,
                   use_unicode_sqrt_char=False) == ucode_str1
    assert xpretty(expr, use_unicode=True,
                   use_unicode_sqrt_char=True) == ucode_str2


def test_pretty_sqrt_longsymbol_no_sqrt_char():
    # Do not use unicode sqrt char for long symbols (see PR #9234).
    expr = sqrt(Symbol('C1'))
    ucode_str = \
"""\
  ____\n\
╲╱ C₁ \
"""
    assert upretty(expr) == ucode_str


def test_pretty_KroneckerDelta():
    x, y = symbols("x, y")
    expr = KroneckerDelta(x, y)
    ascii_str = \
"""\
d   \n\
 x,y\
"""
    ucode_str = \
"""\
δ   \n\
 x,y\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_product():
    n, m, k, l = symbols('n m k l')
    f = symbols('f', cls=Function)
    expr = Product(f((n/3)**2), (n, k**2, l))

    unicode_str = \
"""\
    l           \n\
─┬──────┬─      \n\
 │      │   ⎛ 2⎞\n\
 │      │   ⎜n ⎟\n\
 │      │  f⎜──⎟\n\
 │      │   ⎝9 ⎠\n\
 │      │       \n\
       2        \n\
  n = k         """
    ascii_str = \
"""\
    l           \n\
__________      \n\
 |      |   / 2\\\n\
 |      |   |n |\n\
 |      |  f|--|\n\
 |      |   \\9 /\n\
 |      |       \n\
       2        \n\
  n = k         """

    expr = Product(f((n/3)**2), (n, k**2, l), (l, 1, m))

    unicode_str = \
"""\
    m          l           \n\
─┬──────┬─ ─┬──────┬─      \n\
 │      │   │      │   ⎛ 2⎞\n\
 │      │   │      │   ⎜n ⎟\n\
 │      │   │      │  f⎜──⎟\n\
 │      │   │      │   ⎝9 ⎠\n\
 │      │   │      │       \n\
  l = 1           2        \n\
             n = k         """
    ascii_str = \
"""\
    m          l           \n\
__________ __________      \n\
 |      |   |      |   / 2\\\n\
 |      |   |      |   |n |\n\
 |      |   |      |  f|--|\n\
 |      |   |      |   \\9 /\n\
 |      |   |      |       \n\
  l = 1           2        \n\
             n = k         """

    assert pretty(expr) == ascii_str
    assert upretty(expr) == unicode_str


def test_pretty_Lambda():
    # S.IdentityFunction is a special case
    expr = Lambda(y, y)
    assert pretty(expr) == "x -> x"
    assert upretty(expr) == "x ↦ x"

    expr = Lambda(x, x+1)
    assert pretty(expr) == "x -> x + 1"
    assert upretty(expr) == "x ↦ x + 1"

    expr = Lambda(x, x**2)
    ascii_str = \
"""\
      2\n\
x -> x \
"""
    ucode_str = \
"""\
     2\n\
x ↦ x \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Lambda(x, x**2)**2
    ascii_str = \
"""\
         2
/      2\\ \n\
\\x -> x / \
"""
    ucode_str = \
"""\
        2
⎛     2⎞ \n\
⎝x ↦ x ⎠ \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Lambda((x, y), x)
    ascii_str = "(x, y) -> x"
    ucode_str = "(x, y) ↦ x"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Lambda((x, y), x**2)
    ascii_str = \
"""\
           2\n\
(x, y) -> x \
"""
    ucode_str = \
"""\
          2\n\
(x, y) ↦ x \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Lambda(((x, y),), x**2)
    ascii_str = \
"""\
              2\n\
((x, y),) -> x \
"""
    ucode_str = \
"""\
             2\n\
((x, y),) ↦ x \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_TransferFunction():
    tf1 = TransferFunction(s - 1, s + 1, s)
    assert upretty(tf1) == "s - 1\n─────\ns + 1"
    tf2 = TransferFunction(2*s + 1, 3 - p, s)
    assert upretty(tf2) == "2⋅s + 1\n───────\n 3 - p "
    tf3 = TransferFunction(p, p + 1, p)
    assert upretty(tf3) == "  p  \n─────\np + 1"


def test_pretty_Series():
    tf1 = TransferFunction(x + y, x - 2*y, y)
    tf2 = TransferFunction(x - y, x + y, y)
    tf3 = TransferFunction(x**2 + y, y - x, y)
    tf4 = TransferFunction(2, 3, y)

    tfm1 = TransferFunctionMatrix([[tf1, tf2], [tf3, tf4]])
    tfm2 = TransferFunctionMatrix([[tf3], [-tf4]])
    tfm3 = TransferFunctionMatrix([[tf1, -tf2, -tf3], [tf3, -tf4, tf2]])
    tfm4 = TransferFunctionMatrix([[tf1, tf2], [tf3, -tf4], [-tf2, -tf1]])
    tfm5 = TransferFunctionMatrix([[-tf2, -tf1], [tf4, -tf3], [tf1, tf2]])

    expected1 = \
"""\
          ⎛ 2    ⎞\n\
⎛ x + y ⎞ ⎜x  + y⎟\n\
⎜───────⎟⋅⎜──────⎟\n\
⎝x - 2⋅y⎠ ⎝-x + y⎠\
"""
    expected2 = \
"""\
⎛-x + y⎞ ⎛-x - y ⎞\n\
⎜──────⎟⋅⎜───────⎟\n\
⎝x + y ⎠ ⎝x - 2⋅y⎠\
"""
    expected3 = \
"""\
⎛ 2    ⎞                            \n\
⎜x  + y⎟ ⎛ x + y ⎞ ⎛-x - y    x - y⎞\n\
⎜──────⎟⋅⎜───────⎟⋅⎜─────── + ─────⎟\n\
⎝-x + y⎠ ⎝x - 2⋅y⎠ ⎝x - 2⋅y   x + y⎠\
"""
    expected4 = \
"""\
                  ⎛         2    ⎞\n\
⎛ x + y    x - y⎞ ⎜x - y   x  + y⎟\n\
⎜─────── + ─────⎟⋅⎜───── + ──────⎟\n\
⎝x - 2⋅y   x + y⎠ ⎝x + y   -x + y⎠\
"""
    expected5 = \
"""\
⎡ x + y   x - y⎤  ⎡ 2    ⎤ \n\
⎢───────  ─────⎥  ⎢x  + y⎥ \n\
⎢x - 2⋅y  x + y⎥  ⎢──────⎥ \n\
⎢              ⎥  ⎢-x + y⎥ \n\
⎢ 2            ⎥ ⋅⎢      ⎥ \n\
⎢x  + y     2  ⎥  ⎢ -2   ⎥ \n\
⎢──────     ─  ⎥  ⎢ ───  ⎥ \n\
⎣-x + y     3  ⎦τ ⎣  3   ⎦τ\
"""
    expected6 = \
"""\
                                               ⎛⎡ x + y    x - y ⎤    ⎡ x - y    x + y ⎤ ⎞\n\
                                               ⎜⎢───────   ───── ⎥    ⎢ ─────   ───────⎥ ⎟\n\
⎡ x + y   x - y⎤  ⎡                    2    ⎤  ⎜⎢x - 2⋅y   x + y ⎥    ⎢ x + y   x - 2⋅y⎥ ⎟\n\
⎢───────  ─────⎥  ⎢ x + y   -x + y  - x  - y⎥  ⎜⎢                ⎥    ⎢                ⎥ ⎟\n\
⎢x - 2⋅y  x + y⎥  ⎢───────  ──────  ────────⎥  ⎜⎢ 2              ⎥    ⎢          2     ⎥ ⎟\n\
⎢              ⎥  ⎢x - 2⋅y  x + y    -x + y ⎥  ⎜⎢x  + y     -2   ⎥    ⎢  -2     x  + y ⎥ ⎟\n\
⎢ 2            ⎥ ⋅⎢                         ⎥ ⋅⎜⎢──────     ───  ⎥  + ⎢  ───    ────── ⎥ ⎟\n\
⎢x  + y     2  ⎥  ⎢ 2                       ⎥  ⎜⎢-x + y      3   ⎥    ⎢   3     -x + y ⎥ ⎟\n\
⎢──────     ─  ⎥  ⎢x  + y    -2      x - y  ⎥  ⎜⎢                ⎥    ⎢                ⎥ ⎟\n\
⎣-x + y     3  ⎦τ ⎢──────    ───     ─────  ⎥  ⎜⎢-x + y   -x - y ⎥    ⎢-x - y   -x + y ⎥ ⎟\n\
                  ⎣-x + y     3      x + y  ⎦τ ⎜⎢──────   ───────⎥    ⎢───────  ────── ⎥ ⎟\n\
                                               ⎝⎣x + y    x - 2⋅y⎦τ   ⎣x - 2⋅y  x + y  ⎦τ⎠\
"""

    assert upretty(Series(tf1, tf3)) == expected1
    assert upretty(Series(-tf2, -tf1)) == expected2
    assert upretty(Series(tf3, tf1, Parallel(-tf1, tf2))) == expected3
    assert upretty(Series(Parallel(tf1, tf2), Parallel(tf2, tf3))) == expected4
    assert upretty(MIMOSeries(tfm2, tfm1)) == expected5
    assert upretty(MIMOSeries(MIMOParallel(tfm4, -tfm5), tfm3, tfm1)) == expected6


def test_pretty_Parallel():
    tf1 = TransferFunction(x + y, x - 2*y, y)
    tf2 = TransferFunction(x - y, x + y, y)
    tf3 = TransferFunction(x**2 + y, y - x, y)
    tf4 = TransferFunction(y**2 - x, x**3 + x, y)

    tfm1 = TransferFunctionMatrix([[tf1, tf2], [tf3, -tf4], [-tf2, -tf1]])
    tfm2 = TransferFunctionMatrix([[-tf2, -tf1], [tf4, -tf3], [tf1, tf2]])
    tfm3 = TransferFunctionMatrix([[-tf1, tf2], [-tf3, tf4], [tf2, tf1]])
    tfm4 = TransferFunctionMatrix([[-tf1, -tf2], [-tf3, -tf4]])

    expected1 = \
"""\
 x + y    x - y\n\
─────── + ─────\n\
x - 2⋅y   x + y\
"""
    expected2 = \
"""\
-x + y   -x - y \n\
────── + ───────
x + y    x - 2⋅y\
"""
    expected3 = \
"""\
 2                                  \n\
x  + y    x + y    ⎛-x - y ⎞ ⎛x - y⎞
────── + ─────── + ⎜───────⎟⋅⎜─────⎟
-x + y   x - 2⋅y   ⎝x - 2⋅y⎠ ⎝x + y⎠\
"""

    expected4 = \
"""\
                            ⎛ 2    ⎞\n\
⎛ x + y ⎞ ⎛x - y⎞   ⎛x - y⎞ ⎜x  + y⎟\n\
⎜───────⎟⋅⎜─────⎟ + ⎜─────⎟⋅⎜──────⎟\n\
⎝x - 2⋅y⎠ ⎝x + y⎠   ⎝x + y⎠ ⎝-x + y⎠\
"""
    expected5 = \
"""\
⎡ x + y   -x + y ⎤    ⎡ x - y    x + y ⎤    ⎡ x + y    x - y ⎤ \n\
⎢───────  ────── ⎥    ⎢ ─────   ───────⎥    ⎢───────   ───── ⎥ \n\
⎢x - 2⋅y  x + y  ⎥    ⎢ x + y   x - 2⋅y⎥    ⎢x - 2⋅y   x + y ⎥ \n\
⎢                ⎥    ⎢                ⎥    ⎢                ⎥ \n\
⎢ 2            2 ⎥    ⎢     2    2     ⎥    ⎢ 2            2 ⎥ \n\
⎢x  + y   x - y  ⎥    ⎢x - y    x  + y ⎥    ⎢x  + y   x - y  ⎥ \n\
⎢──────   ────── ⎥  + ⎢──────   ────── ⎥  + ⎢──────   ────── ⎥ \n\
⎢-x + y    3     ⎥    ⎢ 3       -x + y ⎥    ⎢-x + y    3     ⎥ \n\
⎢         x  + x ⎥    ⎢x  + x          ⎥    ⎢         x  + x ⎥ \n\
⎢                ⎥    ⎢                ⎥    ⎢                ⎥ \n\
⎢-x + y   -x - y ⎥    ⎢-x - y   -x + y ⎥    ⎢-x + y   -x - y ⎥ \n\
⎢──────   ───────⎥    ⎢───────  ────── ⎥    ⎢──────   ───────⎥ \n\
⎣x + y    x - 2⋅y⎦τ   ⎣x - 2⋅y  x + y  ⎦τ   ⎣x + y    x - 2⋅y⎦τ\
"""
    expected6 = \
"""\
⎡ x - y    x + y ⎤                        ⎡-x + y   -x - y  ⎤ \n\
⎢ ─────   ───────⎥                        ⎢──────   ─────── ⎥ \n\
⎢ x + y   x - 2⋅y⎥  ⎡-x - y    -x + y⎤    ⎢x + y    x - 2⋅y ⎥ \n\
⎢                ⎥  ⎢───────   ──────⎥    ⎢                 ⎥ \n\
⎢     2    2     ⎥  ⎢x - 2⋅y   x + y ⎥    ⎢      2     2    ⎥ \n\
⎢x - y    x  + y ⎥  ⎢                ⎥    ⎢-x + y   - x  - y⎥ \n\
⎢──────   ────── ⎥ ⋅⎢   2           2⎥  + ⎢───────  ────────⎥ \n\
⎢ 3       -x + y ⎥  ⎢- x  - y  x - y ⎥    ⎢ 3        -x + y ⎥ \n\
⎢x  + x          ⎥  ⎢────────  ──────⎥    ⎢x  + x           ⎥ \n\
⎢                ⎥  ⎢ -x + y    3    ⎥    ⎢                 ⎥ \n\
⎢-x - y   -x + y ⎥  ⎣          x  + x⎦τ   ⎢ x + y    x - y  ⎥ \n\
⎢───────  ────── ⎥                        ⎢───────   ─────  ⎥ \n\
⎣x - 2⋅y  x + y  ⎦τ                       ⎣x - 2⋅y   x + y  ⎦τ\
"""
    assert upretty(Parallel(tf1, tf2)) == expected1
    assert upretty(Parallel(-tf2, -tf1)) == expected2
    assert upretty(Parallel(tf3, tf1, Series(-tf1, tf2))) == expected3
    assert upretty(Parallel(Series(tf1, tf2), Series(tf2, tf3))) == expected4
    assert upretty(MIMOParallel(-tfm3, -tfm2, tfm1)) == expected5
    assert upretty(MIMOParallel(MIMOSeries(tfm4, -tfm2), tfm2)) == expected6


def test_pretty_Feedback():
    tf = TransferFunction(1, 1, y)
    tf1 = TransferFunction(x + y, x - 2*y, y)
    tf2 = TransferFunction(x - y, x + y, y)
    tf3 = TransferFunction(y**2 - 2*y + 1, y + 5, y)
    tf4 = TransferFunction(x - 2*y**3, x + y, x)
    tf5 = TransferFunction(1 - x, x - y, y)
    tf6 = TransferFunction(2, 2, x)
    expected1 = \
"""\
     ⎛1⎞     \n\
     ⎜─⎟     \n\
     ⎝1⎠     \n\
─────────────\n\
1   ⎛ x + y ⎞\n\
─ + ⎜───────⎟\n\
1   ⎝x - 2⋅y⎠\
"""
    expected2 = \
"""\
                ⎛1⎞                 \n\
                ⎜─⎟                 \n\
                ⎝1⎠                 \n\
────────────────────────────────────\n\
                      ⎛ 2          ⎞\n\
1   ⎛x - y⎞ ⎛ x + y ⎞ ⎜y  - 2⋅y + 1⎟\n\
─ + ⎜─────⎟⋅⎜───────⎟⋅⎜────────────⎟\n\
1   ⎝x + y⎠ ⎝x - 2⋅y⎠ ⎝   y + 5    ⎠\
"""
    expected3 = \
"""\
                 ⎛ x + y ⎞                  \n\
                 ⎜───────⎟                  \n\
                 ⎝x - 2⋅y⎠                  \n\
────────────────────────────────────────────\n\
                      ⎛ 2          ⎞        \n\
1   ⎛ x + y ⎞ ⎛x - y⎞ ⎜y  - 2⋅y + 1⎟ ⎛1 - x⎞\n\
─ + ⎜───────⎟⋅⎜─────⎟⋅⎜────────────⎟⋅⎜─────⎟\n\
1   ⎝x - 2⋅y⎠ ⎝x + y⎠ ⎝   y + 5    ⎠ ⎝x - y⎠\
"""
    expected4 = \
"""\
  ⎛ x + y ⎞ ⎛x - y⎞  \n\
  ⎜───────⎟⋅⎜─────⎟  \n\
  ⎝x - 2⋅y⎠ ⎝x + y⎠  \n\
─────────────────────\n\
1   ⎛ x + y ⎞ ⎛x - y⎞\n\
─ + ⎜───────⎟⋅⎜─────⎟\n\
1   ⎝x - 2⋅y⎠ ⎝x + y⎠\
"""
    expected5 = \
"""\
      ⎛ x + y ⎞ ⎛x - y⎞      \n\
      ⎜───────⎟⋅⎜─────⎟      \n\
      ⎝x - 2⋅y⎠ ⎝x + y⎠      \n\
─────────────────────────────\n\
1   ⎛ x + y ⎞ ⎛x - y⎞ ⎛1 - x⎞\n\
─ + ⎜───────⎟⋅⎜─────⎟⋅⎜─────⎟\n\
1   ⎝x - 2⋅y⎠ ⎝x + y⎠ ⎝x - y⎠\
"""
    expected6 = \
"""\
           ⎛ 2          ⎞                   \n\
           ⎜y  - 2⋅y + 1⎟ ⎛1 - x⎞           \n\
           ⎜────────────⎟⋅⎜─────⎟           \n\
           ⎝   y + 5    ⎠ ⎝x - y⎠           \n\
────────────────────────────────────────────\n\
    ⎛ 2          ⎞                          \n\
1   ⎜y  - 2⋅y + 1⎟ ⎛1 - x⎞ ⎛x - y⎞ ⎛ x + y ⎞\n\
─ + ⎜────────────⎟⋅⎜─────⎟⋅⎜─────⎟⋅⎜───────⎟\n\
1   ⎝   y + 5    ⎠ ⎝x - y⎠ ⎝x + y⎠ ⎝x - 2⋅y⎠\
"""
    expected7 = \
"""\
    ⎛       3⎞    \n\
    ⎜x - 2⋅y ⎟    \n\
    ⎜────────⎟    \n\
    ⎝ x + y  ⎠    \n\
──────────────────\n\
    ⎛       3⎞    \n\
1   ⎜x - 2⋅y ⎟ ⎛2⎞\n\
─ + ⎜────────⎟⋅⎜─⎟\n\
1   ⎝ x + y  ⎠ ⎝2⎠\
"""
    expected8 = \
"""\
  ⎛1 - x⎞  \n\
  ⎜─────⎟  \n\
  ⎝x - y⎠  \n\
───────────\n\
1   ⎛1 - x⎞\n\
─ + ⎜─────⎟\n\
1   ⎝x - y⎠\
"""
    expected9 = \
"""\
      ⎛ x + y ⎞ ⎛x - y⎞      \n\
      ⎜───────⎟⋅⎜─────⎟      \n\
      ⎝x - 2⋅y⎠ ⎝x + y⎠      \n\
─────────────────────────────\n\
1   ⎛ x + y ⎞ ⎛x - y⎞ ⎛1 - x⎞\n\
─ - ⎜───────⎟⋅⎜─────⎟⋅⎜─────⎟\n\
1   ⎝x - 2⋅y⎠ ⎝x + y⎠ ⎝x - y⎠\
"""
    expected10 = \
"""\
  ⎛1 - x⎞  \n\
  ⎜─────⎟  \n\
  ⎝x - y⎠  \n\
───────────\n\
1   ⎛1 - x⎞\n\
─ - ⎜─────⎟\n\
1   ⎝x - y⎠\
"""
    assert upretty(Feedback(tf, tf1)) == expected1
    assert upretty(Feedback(tf, tf2*tf1*tf3)) == expected2
    assert upretty(Feedback(tf1, tf2*tf3*tf5)) == expected3
    assert upretty(Feedback(tf1*tf2, tf)) == expected4
    assert upretty(Feedback(tf1*tf2, tf5)) == expected5
    assert upretty(Feedback(tf3*tf5, tf2*tf1)) == expected6
    assert upretty(Feedback(tf4, tf6)) == expected7
    assert upretty(Feedback(tf5, tf)) == expected8

    assert upretty(Feedback(tf1*tf2, tf5, 1)) == expected9
    assert upretty(Feedback(tf5, tf, 1)) == expected10


def test_pretty_MIMOFeedback():
    tf1 = TransferFunction(x + y, x - 2*y, y)
    tf2 = TransferFunction(x - y, x + y, y)
    tfm_1 = TransferFunctionMatrix([[tf1, tf2], [tf2, tf1]])
    tfm_2 = TransferFunctionMatrix([[tf2, tf1], [tf1, tf2]])
    tfm_3 = TransferFunctionMatrix([[tf1, tf1], [tf2, tf2]])

    expected1 = \
"""\
⎛    ⎡ x + y    x - y ⎤  ⎡ x - y    x + y ⎤ ⎞-1   ⎡ x + y    x - y ⎤ \n\
⎜    ⎢───────   ───── ⎥  ⎢ ─────   ───────⎥ ⎟     ⎢───────   ───── ⎥ \n\
⎜    ⎢x - 2⋅y   x + y ⎥  ⎢ x + y   x - 2⋅y⎥ ⎟     ⎢x - 2⋅y   x + y ⎥ \n\
⎜I - ⎢                ⎥ ⋅⎢                ⎥ ⎟   ⋅ ⎢                ⎥ \n\
⎜    ⎢ x - y    x + y ⎥  ⎢ x + y    x - y ⎥ ⎟     ⎢ x - y    x + y ⎥ \n\
⎜    ⎢ ─────   ───────⎥  ⎢───────   ───── ⎥ ⎟     ⎢ ─────   ───────⎥ \n\
⎝    ⎣ x + y   x - 2⋅y⎦τ ⎣x - 2⋅y   x + y ⎦τ⎠     ⎣ x + y   x - 2⋅y⎦τ\
"""
    expected2 = \
"""\
⎛    ⎡ x + y    x - y ⎤  ⎡ x - y    x + y ⎤  ⎡ x + y    x + y ⎤ ⎞-1   ⎡ x + y    x - y ⎤  ⎡ x - y    x + y ⎤ \n\
⎜    ⎢───────   ───── ⎥  ⎢ ─────   ───────⎥  ⎢───────  ───────⎥ ⎟     ⎢───────   ───── ⎥  ⎢ ─────   ───────⎥ \n\
⎜    ⎢x - 2⋅y   x + y ⎥  ⎢ x + y   x - 2⋅y⎥  ⎢x - 2⋅y  x - 2⋅y⎥ ⎟     ⎢x - 2⋅y   x + y ⎥  ⎢ x + y   x - 2⋅y⎥ \n\
⎜I + ⎢                ⎥ ⋅⎢                ⎥ ⋅⎢                ⎥ ⎟   ⋅ ⎢                ⎥ ⋅⎢                ⎥ \n\
⎜    ⎢ x - y    x + y ⎥  ⎢ x + y    x - y ⎥  ⎢ x - y    x - y ⎥ ⎟     ⎢ x - y    x + y ⎥  ⎢ x + y    x - y ⎥ \n\
⎜    ⎢ ─────   ───────⎥  ⎢───────   ───── ⎥  ⎢ ─────    ───── ⎥ ⎟     ⎢ ─────   ───────⎥  ⎢───────   ───── ⎥ \n\
⎝    ⎣ x + y   x - 2⋅y⎦τ ⎣x - 2⋅y   x + y ⎦τ ⎣ x + y    x + y ⎦τ⎠     ⎣ x + y   x - 2⋅y⎦τ ⎣x - 2⋅y   x + y ⎦τ\
"""

    assert upretty(MIMOFeedback(tfm_1, tfm_2, 1)) == \
        expected1  # Positive MIMOFeedback
    assert upretty(MIMOFeedback(tfm_1*tfm_2, tfm_3)) == \
        expected2  # Negative MIMOFeedback (Default)


def test_pretty_TransferFunctionMatrix():
    tf1 = TransferFunction(x + y, x - 2*y, y)
    tf2 = TransferFunction(x - y, x + y, y)
    tf3 = TransferFunction(y**2 - 2*y + 1, y + 5, y)
    tf4 = TransferFunction(y, x**2 + x + 1, y)
    tf5 = TransferFunction(1 - x, x - y, y)
    tf6 = TransferFunction(2, 2, y)
    expected1 = \
"""\
⎡ x + y ⎤ \n\
⎢───────⎥ \n\
⎢x - 2⋅y⎥ \n\
⎢       ⎥ \n\
⎢ x - y ⎥ \n\
⎢ ───── ⎥ \n\
⎣ x + y ⎦τ\
"""
    expected2 = \
"""\
⎡    x + y     ⎤ \n\
⎢   ───────    ⎥ \n\
⎢   x - 2⋅y    ⎥ \n\
⎢              ⎥ \n\
⎢    x - y     ⎥ \n\
⎢    ─────     ⎥ \n\
⎢    x + y     ⎥ \n\
⎢              ⎥ \n\
⎢   2          ⎥ \n\
⎢- y  + 2⋅y - 1⎥ \n\
⎢──────────────⎥ \n\
⎣    y + 5     ⎦τ\
"""
    expected3 = \
"""\
⎡   x + y        x - y   ⎤ \n\
⎢  ───────       ─────   ⎥ \n\
⎢  x - 2⋅y       x + y   ⎥ \n\
⎢                        ⎥ \n\
⎢ 2                      ⎥ \n\
⎢y  - 2⋅y + 1      y     ⎥ \n\
⎢────────────  ──────────⎥ \n\
⎢   y + 5       2        ⎥ \n\
⎢              x  + x + 1⎥ \n\
⎢                        ⎥ \n\
⎢   1 - x          2     ⎥ \n\
⎢   ─────          ─     ⎥ \n\
⎣   x - y          2     ⎦τ\
"""
    expected4 = \
"""\
⎡    x - y        x + y       y     ⎤ \n\
⎢    ─────       ───────  ──────────⎥ \n\
⎢    x + y       x - 2⋅y   2        ⎥ \n\
⎢                         x  + x + 1⎥ \n\
⎢                                   ⎥ \n\
⎢   2                               ⎥ \n\
⎢- y  + 2⋅y - 1   x - 1      -2     ⎥ \n\
⎢──────────────   ─────      ───    ⎥ \n\
⎣    y + 5        x - y       2     ⎦τ\
"""
    expected5 = \
"""\
⎡ x + y  x - y   x + y       y     ⎤ \n\
⎢───────⋅─────  ───────  ──────────⎥ \n\
⎢x - 2⋅y x + y  x - 2⋅y   2        ⎥ \n\
⎢                        x  + x + 1⎥ \n\
⎢                                  ⎥ \n\
⎢  1 - x   2     x + y      -2     ⎥ \n\
⎢  ───── + ─    ───────     ───    ⎥ \n\
⎣  x - y   2    x - 2⋅y      2     ⎦τ\
"""

    assert upretty(TransferFunctionMatrix([[tf1], [tf2]])) == expected1
    assert upretty(TransferFunctionMatrix([[tf1], [tf2], [-tf3]])) == expected2
    assert upretty(TransferFunctionMatrix([[tf1, tf2], [tf3, tf4], [tf5, tf6]])) == expected3
    assert upretty(TransferFunctionMatrix([[tf2, tf1, tf4], [-tf3, -tf5, -tf6]])) == expected4
    assert upretty(TransferFunctionMatrix([[Series(tf2, tf1), tf1, tf4], [Parallel(tf6, tf5), tf1, -tf6]])) == \
        expected5


def test_pretty_StateSpace():
    ss1 = StateSpace(Matrix([a]), Matrix([b]), Matrix([c]), Matrix([d]))
    A = Matrix([[0, 1], [1, 0]])
    B = Matrix([1, 0])
    C = Matrix([[0, 1]])
    D = Matrix([0])
    ss2 = StateSpace(A, B, C, D)
    ss3 = StateSpace(Matrix([[-1.5, -2], [1, 0]]),
                    Matrix([[0.5, 0], [0, 1]]),
                    Matrix([[0, 1], [0, 2]]),
                    Matrix([[2, 2], [1, 1]]))

    expected1 = \
"""\
⎡[a]  [b]⎤\n\
⎢        ⎥\n\
⎣[c]  [d]⎦\
"""
    expected2 = \
"""\
⎡⎡0  1⎤  ⎡1⎤⎤\n\
⎢⎢    ⎥  ⎢ ⎥⎥\n\
⎢⎣1  0⎦  ⎣0⎦⎥\n\
⎢           ⎥\n\
⎣[0  1]  [0]⎦\
"""
    expected3 = \
"""\
⎡⎡-1.5  -2⎤  ⎡0.5  0⎤⎤\n\
⎢⎢        ⎥  ⎢      ⎥⎥\n\
⎢⎣ 1    0 ⎦  ⎣ 0   1⎦⎥\n\
⎢                    ⎥\n\
⎢  ⎡0  1⎤     ⎡2  2⎤ ⎥\n\
⎢  ⎢    ⎥     ⎢    ⎥ ⎥\n\
⎣  ⎣0  2⎦     ⎣1  1⎦ ⎦\
"""

    assert upretty(ss1) == expected1
    assert upretty(ss2) == expected2
    assert upretty(ss3) == expected3

def test_pretty_order():
    expr = O(1)
    ascii_str = \
"""\
O(1)\
"""
    ucode_str = \
"""\
O(1)\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = O(1/x)
    ascii_str = \
"""\
 /1\\\n\
O|-|\n\
 \\x/\
"""
    ucode_str = \
"""\
 ⎛1⎞\n\
O⎜─⎟\n\
 ⎝x⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = O(x**2 + y**2)
    ascii_str = \
"""\
 / 2    2                  \\\n\
O\\x  + y ; (x, y) -> (0, 0)/\
"""
    ucode_str = \
"""\
 ⎛ 2    2                 ⎞\n\
O⎝x  + y ; (x, y) → (0, 0)⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = O(1, (x, oo))
    ascii_str = \
"""\
O(1; x -> oo)\
"""
    ucode_str = \
"""\
O(1; x → ∞)\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = O(1/x, (x, oo))
    ascii_str = \
"""\
 /1         \\\n\
O|-; x -> oo|\n\
 \\x         /\
"""
    ucode_str = \
"""\
 ⎛1       ⎞\n\
O⎜─; x → ∞⎟\n\
 ⎝x       ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = O(x**2 + y**2, (x, oo), (y, oo))
    ascii_str = \
"""\
 / 2    2                    \\\n\
O\\x  + y ; (x, y) -> (oo, oo)/\
"""
    ucode_str = \
"""\
 ⎛ 2    2                 ⎞\n\
O⎝x  + y ; (x, y) → (∞, ∞)⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_derivatives():
    # Simple
    expr = Derivative(log(x), x, evaluate=False)
    ascii_str = \
"""\
d         \n\
--(log(x))\n\
dx        \
"""
    ucode_str = \
"""\
d         \n\
──(log(x))\n\
dx        \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Derivative(log(x), x, evaluate=False) + x
    ascii_str_1 = \
"""\
    d         \n\
x + --(log(x))\n\
    dx        \
"""
    ascii_str_2 = \
"""\
d             \n\
--(log(x)) + x\n\
dx            \
"""
    ucode_str_1 = \
"""\
    d         \n\
x + ──(log(x))\n\
    dx        \
"""
    ucode_str_2 = \
"""\
d             \n\
──(log(x)) + x\n\
dx            \
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    # basic partial derivatives
    expr = Derivative(log(x + y) + x, x)
    ascii_str_1 = \
"""\
d                 \n\
--(log(x + y) + x)\n\
dx                \
"""
    ascii_str_2 = \
"""\
d                 \n\
--(x + log(x + y))\n\
dx                \
"""
    ucode_str_1 = \
"""\
∂                 \n\
──(log(x + y) + x)\n\
∂x                \
"""
    ucode_str_2 = \
"""\
∂                 \n\
──(x + log(x + y))\n\
∂x                \
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2], upretty(expr)

    # Multiple symbols
    expr = Derivative(log(x) + x**2, x, y)
    ascii_str_1 = \
"""\
   2              \n\
  d  /          2\\\n\
-----\\log(x) + x /\n\
dy dx             \
"""
    ascii_str_2 = \
"""\
   2              \n\
  d  / 2         \\\n\
-----\\x  + log(x)/\n\
dy dx             \
"""
    ascii_str_3 = \
"""\
  2               \n\
 d   / 2         \\\n\
-----\\x  + log(x)/\n\
dy dx             \
"""
    ucode_str_1 = \
"""\
   2              \n\
  d  ⎛          2⎞\n\
─────⎝log(x) + x ⎠\n\
dy dx             \
"""
    ucode_str_2 = \
"""\
   2              \n\
  d  ⎛ 2         ⎞\n\
─────⎝x  + log(x)⎠\n\
dy dx             \
"""
    ucode_str_3 = \
"""\
  2               \n\
 d   ⎛ 2         ⎞\n\
─────⎝x  + log(x)⎠\n\
dy dx             \
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2, ascii_str_3]
    assert upretty(expr) in [ucode_str_1, ucode_str_2, ucode_str_3]

    expr = Derivative(2*x*y, y, x) + x**2
    ascii_str_1 = \
"""\
   2             \n\
  d             2\n\
-----(2*x*y) + x \n\
dx dy            \
"""
    ascii_str_2 = \
"""\
        2        \n\
 2     d         \n\
x  + -----(2*x*y)\n\
     dx dy       \
"""
    ascii_str_3 = \
"""\
       2         \n\
 2    d          \n\
x  + -----(2*x*y)\n\
     dx dy       \
"""
    ucode_str_1 = \
"""\
   2             \n\
  ∂             2\n\
─────(2⋅x⋅y) + x \n\
∂x ∂y            \
"""
    ucode_str_2 = \
"""\
        2        \n\
 2     ∂         \n\
x  + ─────(2⋅x⋅y)\n\
     ∂x ∂y       \
"""
    ucode_str_3 = \
"""\
       2         \n\
 2    ∂          \n\
x  + ─────(2⋅x⋅y)\n\
     ∂x ∂y       \
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2, ascii_str_3]
    assert upretty(expr) in [ucode_str_1, ucode_str_2, ucode_str_3]

    expr = Derivative(2*x*y, x, x)
    ascii_str = \
"""\
 2        \n\
d         \n\
---(2*x*y)\n\
  2       \n\
dx        \
"""
    ucode_str = \
"""\
 2        \n\
∂         \n\
───(2⋅x⋅y)\n\
  2       \n\
∂x        \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Derivative(2*x*y, x, 17)
    ascii_str = \
"""\
 17        \n\
d          \n\
----(2*x*y)\n\
  17       \n\
dx         \
"""
    ucode_str = \
"""\
 17        \n\
∂          \n\
────(2⋅x⋅y)\n\
  17       \n\
∂x         \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Derivative(2*x*y, x, x, y)
    ascii_str = \
"""\
   3         \n\
  d          \n\
------(2*x*y)\n\
     2       \n\
dy dx        \
"""
    ucode_str = \
"""\
   3         \n\
  ∂          \n\
──────(2⋅x⋅y)\n\
     2       \n\
∂y ∂x        \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    # Greek letters
    alpha = Symbol('alpha')
    beta = Function('beta')
    expr = beta(alpha).diff(alpha)
    ascii_str = \
"""\
  d                \n\
------(beta(alpha))\n\
dalpha             \
"""
    ucode_str = \
"""\
d       \n\
──(β(α))\n\
dα      \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Derivative(f(x), (x, n))

    ascii_str = \
"""\
 n       \n\
d        \n\
---(f(x))\n\
  n      \n\
dx       \
"""
    ucode_str = \
"""\
 n       \n\
d        \n\
───(f(x))\n\
  n      \n\
dx       \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_integrals():
    expr = Integral(log(x), x)
    ascii_str = \
"""\
  /         \n\
 |          \n\
 | log(x) dx\n\
 |          \n\
/           \
"""
    ucode_str = \
"""\
⌠          \n\
⎮ log(x) dx\n\
⌡          \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral(x**2, x)
    ascii_str = \
"""\
  /     \n\
 |      \n\
 |  2   \n\
 | x  dx\n\
 |      \n\
/       \
"""
    ucode_str = \
"""\
⌠      \n\
⎮  2   \n\
⎮ x  dx\n\
⌡      \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral((sin(x))**2 / (tan(x))**2)
    ascii_str = \
"""\
  /          \n\
 |           \n\
 |    2      \n\
 | sin (x)   \n\
 | ------- dx\n\
 |    2      \n\
 | tan (x)   \n\
 |           \n\
/            \
"""
    ucode_str = \
"""\
⌠           \n\
⎮    2      \n\
⎮ sin (x)   \n\
⎮ ─────── dx\n\
⎮    2      \n\
⎮ tan (x)   \n\
⌡           \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral(x**(2**x), x)
    ascii_str = \
"""\
  /        \n\
 |         \n\
 |  / x\\   \n\
 |  \\2 /   \n\
 | x     dx\n\
 |         \n\
/          \
"""
    ucode_str = \
"""\
⌠         \n\
⎮  ⎛ x⎞   \n\
⎮  ⎝2 ⎠   \n\
⎮ x     dx\n\
⌡         \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral(x**2, (x, 1, 2))
    ascii_str = \
"""\
  2      \n\
  /      \n\
 |       \n\
 |   2   \n\
 |  x  dx\n\
 |       \n\
/        \n\
1        \
"""
    ucode_str = \
"""\
2      \n\
⌠      \n\
⎮  2   \n\
⎮ x  dx\n\
⌡      \n\
1      \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral(x**2, (x, Rational(1, 2), 10))
    ascii_str = \
"""\
 10      \n\
  /      \n\
 |       \n\
 |   2   \n\
 |  x  dx\n\
 |       \n\
/        \n\
1/2      \
"""
    ucode_str = \
"""\
10       \n\
⌠        \n\
⎮    2   \n\
⎮   x  dx\n\
⌡        \n\
1/2      \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral(x**2*y**2, x, y)
    ascii_str = \
"""\
  /  /           \n\
 |  |            \n\
 |  |  2  2      \n\
 |  | x *y  dx dy\n\
 |  |            \n\
/  /             \
"""
    ucode_str = \
"""\
⌠ ⌠            \n\
⎮ ⎮  2  2      \n\
⎮ ⎮ x ⋅y  dx dy\n\
⌡ ⌡            \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral(sin(th)/cos(ph), (th, 0, pi), (ph, 0, 2*pi))
    ascii_str = \
"""\
 2*pi pi                           \n\
   /   /                           \n\
  |   |                            \n\
  |   |  sin(theta)                \n\
  |   |  ---------- d(theta) d(phi)\n\
  |   |   cos(phi)                 \n\
  |   |                            \n\
 /   /                             \n\
0    0                             \
"""
    ucode_str = \
"""\
2⋅π π             \n\
 ⌠  ⌠             \n\
 ⎮  ⎮ sin(θ)      \n\
 ⎮  ⎮ ────── dθ dφ\n\
 ⎮  ⎮ cos(φ)      \n\
 ⌡  ⌡             \n\
 0  0             \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_matrix():
    # Empty Matrix
    expr = Matrix()
    ascii_str = "[]"
    unicode_str = "[]"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == unicode_str
    expr = Matrix(2, 0, lambda i, j: 0)
    ascii_str = "[]"
    unicode_str = "[]"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == unicode_str
    expr = Matrix(0, 2, lambda i, j: 0)
    ascii_str = "[]"
    unicode_str = "[]"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == unicode_str
    expr = Matrix([[x**2 + 1, 1], [y, x + y]])
    ascii_str_1 = \
"""\
[     2       ]
[1 + x     1  ]
[             ]
[  y     x + y]\
"""
    ascii_str_2 = \
"""\
[ 2           ]
[x  + 1    1  ]
[             ]
[  y     x + y]\
"""
    ucode_str_1 = \
"""\
⎡     2       ⎤
⎢1 + x     1  ⎥
⎢             ⎥
⎣  y     x + y⎦\
"""
    ucode_str_2 = \
"""\
⎡ 2           ⎤
⎢x  + 1    1  ⎥
⎢             ⎥
⎣  y     x + y⎦\
"""
    assert pretty(expr) in [ascii_str_1, ascii_str_2]
    assert upretty(expr) in [ucode_str_1, ucode_str_2]

    expr = Matrix([[x/y, y, th], [0, exp(I*k*ph), 1]])
    ascii_str = \
"""\
[x                 ]
[-     y      theta]
[y                 ]
[                  ]
[    I*k*phi       ]
[0  e           1  ]\
"""
    ucode_str = \
"""\
⎡x           ⎤
⎢─    y     θ⎥
⎢y           ⎥
⎢            ⎥
⎢    ⅈ⋅k⋅φ   ⎥
⎣0  ℯ       1⎦\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    unicode_str = \
"""\
⎡v̇_msc_00     0         0    ⎤
⎢                            ⎥
⎢   0      v̇_msc_01     0    ⎥
⎢                            ⎥
⎣   0         0      v̇_msc_02⎦\
"""

    expr = diag(*MatrixSymbol('vdot_msc',1,3))
    assert upretty(expr) == unicode_str


def test_pretty_ndim_arrays():
    x, y, z, w = symbols("x y z w")

    for ArrayType in (ImmutableDenseNDimArray, ImmutableSparseNDimArray, MutableDenseNDimArray, MutableSparseNDimArray):
        # Basic: scalar array
        M = ArrayType(x)

        assert pretty(M) == "x"
        assert upretty(M) == "x"

        M = ArrayType([[1/x, y], [z, w]])
        M1 = ArrayType([1/x, y, z])

        M2 = tensorproduct(M1, M)
        M3 = tensorproduct(M, M)

        ascii_str = \
"""\
[1   ]\n\
[-  y]\n\
[x   ]\n\
[    ]\n\
[z  w]\
"""
        ucode_str = \
"""\
⎡1   ⎤\n\
⎢─  y⎥\n\
⎢x   ⎥\n\
⎢    ⎥\n\
⎣z  w⎦\
"""
        assert pretty(M) == ascii_str
        assert upretty(M) == ucode_str

        ascii_str = \
"""\
[1      ]\n\
[-  y  z]\n\
[x      ]\
"""
        ucode_str = \
"""\
⎡1      ⎤\n\
⎢─  y  z⎥\n\
⎣x      ⎦\
"""
        assert pretty(M1) == ascii_str
        assert upretty(M1) == ucode_str

        ascii_str = \
"""\
[[1   y]                       ]\n\
[[--  -]              [z      ]]\n\
[[ 2  x]  [ y    2 ]  [-   y*z]]\n\
[[x    ]  [ -   y  ]  [x      ]]\n\
[[     ]  [ x      ]  [       ]]\n\
[[z   w]  [        ]  [ 2     ]]\n\
[[-   -]  [y*z  w*y]  [z   w*z]]\n\
[[x   x]                       ]\
"""
        ucode_str = \
"""\
⎡⎡1   y⎤                       ⎤\n\
⎢⎢──  ─⎥              ⎡z      ⎤⎥\n\
⎢⎢ 2  x⎥  ⎡ y    2 ⎤  ⎢─   y⋅z⎥⎥\n\
⎢⎢x    ⎥  ⎢ ─   y  ⎥  ⎢x      ⎥⎥\n\
⎢⎢     ⎥  ⎢ x      ⎥  ⎢       ⎥⎥\n\
⎢⎢z   w⎥  ⎢        ⎥  ⎢ 2     ⎥⎥\n\
⎢⎢─   ─⎥  ⎣y⋅z  w⋅y⎦  ⎣z   w⋅z⎦⎥\n\
⎣⎣x   x⎦                       ⎦\
"""
        assert pretty(M2) == ascii_str
        assert upretty(M2) == ucode_str

        ascii_str = \
"""\
[ [1   y]             ]\n\
[ [--  -]             ]\n\
[ [ 2  x]   [ y    2 ]]\n\
[ [x    ]   [ -   y  ]]\n\
[ [     ]   [ x      ]]\n\
[ [z   w]   [        ]]\n\
[ [-   -]   [y*z  w*y]]\n\
[ [x   x]             ]\n\
[                     ]\n\
[[z      ]  [ w      ]]\n\
[[-   y*z]  [ -   w*y]]\n\
[[x      ]  [ x      ]]\n\
[[       ]  [        ]]\n\
[[ 2     ]  [      2 ]]\n\
[[z   w*z]  [w*z  w  ]]\
"""
        ucode_str = \
"""\
⎡ ⎡1   y⎤             ⎤\n\
⎢ ⎢──  ─⎥             ⎥\n\
⎢ ⎢ 2  x⎥   ⎡ y    2 ⎤⎥\n\
⎢ ⎢x    ⎥   ⎢ ─   y  ⎥⎥\n\
⎢ ⎢     ⎥   ⎢ x      ⎥⎥\n\
⎢ ⎢z   w⎥   ⎢        ⎥⎥\n\
⎢ ⎢─   ─⎥   ⎣y⋅z  w⋅y⎦⎥\n\
⎢ ⎣x   x⎦             ⎥\n\
⎢                     ⎥\n\
⎢⎡z      ⎤  ⎡ w      ⎤⎥\n\
⎢⎢─   y⋅z⎥  ⎢ ─   w⋅y⎥⎥\n\
⎢⎢x      ⎥  ⎢ x      ⎥⎥\n\
⎢⎢       ⎥  ⎢        ⎥⎥\n\
⎢⎢ 2     ⎥  ⎢      2 ⎥⎥\n\
⎣⎣z   w⋅z⎦  ⎣w⋅z  w  ⎦⎦\
"""
        assert pretty(M3) == ascii_str
        assert upretty(M3) == ucode_str

        Mrow = ArrayType([[x, y, 1 / z]])
        Mcolumn = ArrayType([[x], [y], [1 / z]])
        Mcol2 = ArrayType([Mcolumn.tolist()])

        ascii_str = \
"""\
[[      1]]\n\
[[x  y  -]]\n\
[[      z]]\
"""
        ucode_str = \
"""\
⎡⎡      1⎤⎤\n\
⎢⎢x  y  ─⎥⎥\n\
⎣⎣      z⎦⎦\
"""
        assert pretty(Mrow) == ascii_str
        assert upretty(Mrow) == ucode_str

        ascii_str = \
"""\
[x]\n\
[ ]\n\
[y]\n\
[ ]\n\
[1]\n\
[-]\n\
[z]\
"""
        ucode_str = \
"""\
⎡x⎤\n\
⎢ ⎥\n\
⎢y⎥\n\
⎢ ⎥\n\
⎢1⎥\n\
⎢─⎥\n\
⎣z⎦\
"""
        assert pretty(Mcolumn) == ascii_str
        assert upretty(Mcolumn) == ucode_str

        ascii_str = \
"""\
[[x]]\n\
[[ ]]\n\
[[y]]\n\
[[ ]]\n\
[[1]]\n\
[[-]]\n\
[[z]]\
"""
        ucode_str = \
"""\
⎡⎡x⎤⎤\n\
⎢⎢ ⎥⎥\n\
⎢⎢y⎥⎥\n\
⎢⎢ ⎥⎥\n\
⎢⎢1⎥⎥\n\
⎢⎢─⎥⎥\n\
⎣⎣z⎦⎦\
"""
        assert pretty(Mcol2) == ascii_str
        assert upretty(Mcol2) == ucode_str


def test_tensor_TensorProduct():
    A = MatrixSymbol("A", 3, 3)
    B = MatrixSymbol("B", 3, 3)
    assert upretty(TensorProduct(A, B)) == "A\u2297B"
    assert upretty(TensorProduct(A, B, A)) == "A\u2297B\u2297A"


def test_diffgeom_print_WedgeProduct():
    from sympy.diffgeom.rn import R2
    from sympy.diffgeom import WedgeProduct
    wp = WedgeProduct(R2.dx, R2.dy)
    assert upretty(wp) == "ⅆ x∧ⅆ y"
    assert pretty(wp) == r"d x/\d y"


def test_Adjoint():
    X = MatrixSymbol('X', 2, 2)
    Y = MatrixSymbol('Y', 2, 2)
    assert pretty(Adjoint(X)) == " +\nX "
    assert pretty(Adjoint(X + Y)) == "       +\n(X + Y) "
    assert pretty(Adjoint(X) + Adjoint(Y)) == " +    +\nX  + Y "
    assert pretty(Adjoint(X*Y)) == "     +\n(X*Y) "
    assert pretty(Adjoint(Y)*Adjoint(X)) == " +  +\nY *X "
    assert pretty(Adjoint(X**2)) == "    +\n/ 2\\ \n\\X / "
    assert pretty(Adjoint(X)**2) == "    2\n/ +\\ \n\\X / "
    assert pretty(Adjoint(Inverse(X))) == "     +\n/ -1\\ \n\\X  / "
    assert pretty(Inverse(Adjoint(X))) == "    -1\n/ +\\  \n\\X /  "
    assert pretty(Adjoint(Transpose(X))) == "    +\n/ T\\ \n\\X / "
    assert pretty(Transpose(Adjoint(X))) == "    T\n/ +\\ \n\\X / "
    assert upretty(Adjoint(X)) == " †\nX "
    assert upretty(Adjoint(X + Y)) == "       †\n(X + Y) "
    assert upretty(Adjoint(X) + Adjoint(Y)) == " †    †\nX  + Y "
    assert upretty(Adjoint(X*Y)) == "     †\n(X⋅Y) "
    assert upretty(Adjoint(Y)*Adjoint(X)) == " †  †\nY ⋅X "
    assert upretty(Adjoint(X**2)) == \
        "    †\n⎛ 2⎞ \n⎝X ⎠ "
    assert upretty(Adjoint(X)**2) == \
        "    2\n⎛ †⎞ \n⎝X ⎠ "
    assert upretty(Adjoint(Inverse(X))) == \
        "     †\n⎛ -1⎞ \n⎝X  ⎠ "
    assert upretty(Inverse(Adjoint(X))) == \
        "    -1\n⎛ †⎞  \n⎝X ⎠  "
    assert upretty(Adjoint(Transpose(X))) == \
        "    †\n⎛ T⎞ \n⎝X ⎠ "
    assert upretty(Transpose(Adjoint(X))) == \
        "    T\n⎛ †⎞ \n⎝X ⎠ "
    m = Matrix(((1, 2), (3, 4)))
    assert upretty(Adjoint(m)) == \
        '      †\n'\
        '⎡1  2⎤ \n'\
        '⎢    ⎥ \n'\
        '⎣3  4⎦ '
    assert upretty(Adjoint(m+X)) == \
        '            †\n'\
        '⎛⎡1  2⎤    ⎞ \n'\
        '⎜⎢    ⎥ + X⎟ \n'\
        '⎝⎣3  4⎦    ⎠ '
    assert upretty(Adjoint(BlockMatrix(((OneMatrix(2, 2), X),
                                        (m, ZeroMatrix(2, 2)))))) == \
        '           †\n'\
        '⎡  𝟙     X⎤ \n'\
        '⎢         ⎥ \n'\
        '⎢⎡1  2⎤   ⎥ \n'\
        '⎢⎢    ⎥  𝟘⎥ \n'\
        '⎣⎣3  4⎦   ⎦ '


def test_Transpose():
    X = MatrixSymbol('X', 2, 2)
    Y = MatrixSymbol('Y', 2, 2)
    assert pretty(Transpose(X)) == " T\nX "
    assert pretty(Transpose(X + Y)) == "       T\n(X + Y) "
    assert pretty(Transpose(X) + Transpose(Y)) == " T    T\nX  + Y "
    assert pretty(Transpose(X*Y)) == "     T\n(X*Y) "
    assert pretty(Transpose(Y)*Transpose(X)) == " T  T\nY *X "
    assert pretty(Transpose(X**2)) == "    T\n/ 2\\ \n\\X / "
    assert pretty(Transpose(X)**2) == "    2\n/ T\\ \n\\X / "
    assert pretty(Transpose(Inverse(X))) == "     T\n/ -1\\ \n\\X  / "
    assert pretty(Inverse(Transpose(X))) == "    -1\n/ T\\  \n\\X /  "
    assert upretty(Transpose(X)) == " T\nX "
    assert upretty(Transpose(X + Y)) == "       T\n(X + Y) "
    assert upretty(Transpose(X) + Transpose(Y)) == " T    T\nX  + Y "
    assert upretty(Transpose(X*Y)) == "     T\n(X⋅Y) "
    assert upretty(Transpose(Y)*Transpose(X)) == " T  T\nY ⋅X "
    assert upretty(Transpose(X**2)) == \
        "    T\n⎛ 2⎞ \n⎝X ⎠ "
    assert upretty(Transpose(X)**2) == \
        "    2\n⎛ T⎞ \n⎝X ⎠ "
    assert upretty(Transpose(Inverse(X))) == \
        "     T\n⎛ -1⎞ \n⎝X  ⎠ "
    assert upretty(Inverse(Transpose(X))) == \
        "    -1\n⎛ T⎞  \n⎝X ⎠  "
    m = Matrix(((1, 2), (3, 4)))
    assert upretty(Transpose(m)) == \
        '      T\n'\
        '⎡1  2⎤ \n'\
        '⎢    ⎥ \n'\
        '⎣3  4⎦ '
    assert upretty(Transpose(m+X)) == \
        '            T\n'\
        '⎛⎡1  2⎤    ⎞ \n'\
        '⎜⎢    ⎥ + X⎟ \n'\
        '⎝⎣3  4⎦    ⎠ '
    assert upretty(Transpose(BlockMatrix(((OneMatrix(2, 2), X),
                                          (m, ZeroMatrix(2, 2)))))) == \
        '           T\n'\
        '⎡  𝟙     X⎤ \n'\
        '⎢         ⎥ \n'\
        '⎢⎡1  2⎤   ⎥ \n'\
        '⎢⎢    ⎥  𝟘⎥ \n'\
        '⎣⎣3  4⎦   ⎦ '


def test_pretty_Trace_issue_9044():
    X = Matrix([[1, 2], [3, 4]])
    Y = Matrix([[2, 4], [6, 8]])
    ascii_str_1 = \
"""\
  /[1  2]\\
tr|[    ]|
  \\[3  4]/\
"""
    ucode_str_1 = \
"""\
  ⎛⎡1  2⎤⎞
tr⎜⎢    ⎥⎟
  ⎝⎣3  4⎦⎠\
"""
    ascii_str_2 = \
"""\
  /[1  2]\\     /[2  4]\\
tr|[    ]| + tr|[    ]|
  \\[3  4]/     \\[6  8]/\
"""
    ucode_str_2 = \
"""\
  ⎛⎡1  2⎤⎞     ⎛⎡2  4⎤⎞
tr⎜⎢    ⎥⎟ + tr⎜⎢    ⎥⎟
  ⎝⎣3  4⎦⎠     ⎝⎣6  8⎦⎠\
"""
    assert pretty(Trace(X)) == ascii_str_1
    assert upretty(Trace(X)) == ucode_str_1

    assert pretty(Trace(X) + Trace(Y)) == ascii_str_2
    assert upretty(Trace(X) + Trace(Y)) == ucode_str_2


def test_MatrixSlice():
    n = Symbol('n', integer=True)
    x, y, z, w, t, = symbols('x y z w t')
    X = MatrixSymbol('X', n, n)
    Y = MatrixSymbol('Y', 10, 10)
    Z = MatrixSymbol('Z', 10, 10)

    expr = MatrixSlice(X, (None, None, None), (None, None, None))
    assert pretty(expr) == upretty(expr) == 'X[:, :]'
    expr = X[x:x + 1, y:y + 1]
    assert pretty(expr) == upretty(expr) == 'X[x:x + 1, y:y + 1]'
    expr = X[x:x + 1:2, y:y + 1:2]
    assert pretty(expr) == upretty(expr) == 'X[x:x + 1:2, y:y + 1:2]'
    expr = X[:x, y:]
    assert pretty(expr) == upretty(expr) == 'X[:x, y:]'
    expr = X[:x, y:]
    assert pretty(expr) == upretty(expr) == 'X[:x, y:]'
    expr = X[x:, :y]
    assert pretty(expr) == upretty(expr) == 'X[x:, :y]'
    expr = X[x:y, z:w]
    assert pretty(expr) == upretty(expr) == 'X[x:y, z:w]'
    expr = X[x:y:t, w:t:x]
    assert pretty(expr) == upretty(expr) == 'X[x:y:t, w:t:x]'
    expr = X[x::y, t::w]
    assert pretty(expr) == upretty(expr) == 'X[x::y, t::w]'
    expr = X[:x:y, :t:w]
    assert pretty(expr) == upretty(expr) == 'X[:x:y, :t:w]'
    expr = X[::x, ::y]
    assert pretty(expr) == upretty(expr) == 'X[::x, ::y]'
    expr = MatrixSlice(X, (0, None, None), (0, None, None))
    assert pretty(expr) == upretty(expr) == 'X[:, :]'
    expr = MatrixSlice(X, (None, n, None), (None, n, None))
    assert pretty(expr) == upretty(expr) == 'X[:, :]'
    expr = MatrixSlice(X, (0, n, None), (0, n, None))
    assert pretty(expr) == upretty(expr) == 'X[:, :]'
    expr = MatrixSlice(X, (0, n, 2), (0, n, 2))
    assert pretty(expr) == upretty(expr) == 'X[::2, ::2]'
    expr = X[1:2:3, 4:5:6]
    assert pretty(expr) == upretty(expr) == 'X[1:2:3, 4:5:6]'
    expr = X[1:3:5, 4:6:8]
    assert pretty(expr) == upretty(expr) == 'X[1:3:5, 4:6:8]'
    expr = X[1:10:2]
    assert pretty(expr) == upretty(expr) == 'X[1:10:2, :]'
    expr = Y[:5, 1:9:2]
    assert pretty(expr) == upretty(expr) == 'Y[:5, 1:9:2]'
    expr = Y[:5, 1:10:2]
    assert pretty(expr) == upretty(expr) == 'Y[:5, 1::2]'
    expr = Y[5, :5:2]
    assert pretty(expr) == upretty(expr) == 'Y[5:6, :5:2]'
    expr = X[0:1, 0:1]
    assert pretty(expr) == upretty(expr) == 'X[:1, :1]'
    expr = X[0:1:2, 0:1:2]
    assert pretty(expr) == upretty(expr) == 'X[:1:2, :1:2]'
    expr = (Y + Z)[2:, 2:]
    assert pretty(expr) == upretty(expr) == '(Y + Z)[2:, 2:]'


def test_MatrixExpressions():
    n = Symbol('n', integer=True)
    X = MatrixSymbol('X', n, n)

    assert pretty(X) == upretty(X) == "X"

    # Apply function elementwise (`ElementwiseApplyFunc`):

    expr = (X.T*X).applyfunc(sin)

    ascii_str = """\
              / T  \\\n\
(d -> sin(d)).\\X *X/\
"""
    ucode_str = """\
             ⎛ T  ⎞\n\
(d ↦ sin(d))˳⎝X ⋅X⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    lamda = Lambda(x, 1/x)
    expr = (n*X).applyfunc(lamda)
    ascii_str = """\
/     1\\      \n\
|x -> -|.(n*X)\n\
\\     x/      \
"""
    ucode_str = """\
⎛    1⎞      \n\
⎜x ↦ ─⎟˳(n⋅X)\n\
⎝    x⎠      \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_dotproduct():
    from sympy.matrices.expressions.dotproduct import DotProduct
    n = symbols("n", integer=True)
    A = MatrixSymbol('A', n, 1)
    B = MatrixSymbol('B', n, 1)
    C = Matrix(1, 3, [1, 2, 3])
    D = Matrix(1, 3, [1, 3, 4])

    assert pretty(DotProduct(A, B)) == "A*B"
    assert pretty(DotProduct(C, D)) == "[1  2  3]*[1  3  4]"
    assert upretty(DotProduct(A, B)) == "A⋅B"
    assert upretty(DotProduct(C, D)) == "[1  2  3]⋅[1  3  4]"


def test_pretty_Determinant():
    from sympy.matrices import Determinant, Inverse, BlockMatrix, OneMatrix, ZeroMatrix
    m = Matrix(((1, 2), (3, 4)))
    assert upretty(Determinant(m)) == '│1  2│\n│    │\n│3  4│'
    assert upretty(Determinant(Inverse(m))) == \
        '│      -1│\n'\
        '│⎡1  2⎤  │\n'\
        '│⎢    ⎥  │\n'\
        '│⎣3  4⎦  │'
    X = MatrixSymbol('X', 2, 2)
    assert upretty(Determinant(X)) == '│X│'
    assert upretty(Determinant(X + m)) == \
        '│⎡1  2⎤    │\n'\
        '│⎢    ⎥ + X│\n'\
        '│⎣3  4⎦    │'
    assert upretty(Determinant(BlockMatrix(((OneMatrix(2, 2), X),
                                            (m, ZeroMatrix(2, 2)))))) == \
        '│  𝟙     X│\n'\
        '│         │\n'\
        '│⎡1  2⎤   │\n'\
        '│⎢    ⎥  𝟘│\n'\
        '│⎣3  4⎦   │'


def test_pretty_piecewise():
    expr = Piecewise((x, x < 1), (x**2, True))
    ascii_str = \
"""\
/x   for x < 1\n\
|             \n\
< 2           \n\
|x   otherwise\n\
\\             \
"""
    ucode_str = \
"""\
⎧x   for x < 1\n\
⎪             \n\
⎨ 2           \n\
⎪x   otherwise\n\
⎩             \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = -Piecewise((x, x < 1), (x**2, True))
    ascii_str = \
"""\
 //x   for x < 1\\\n\
 ||             |\n\
-|< 2           |\n\
 ||x   otherwise|\n\
 \\\\             /\
"""
    ucode_str = \
"""\
 ⎛⎧x   for x < 1⎞\n\
 ⎜⎪             ⎟\n\
-⎜⎨ 2           ⎟\n\
 ⎜⎪x   otherwise⎟\n\
 ⎝⎩             ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = x + Piecewise((x, x > 0), (y, True)) + Piecewise((x/y, x < 2),
    (y**2, x > 2), (1, True)) + 1
    ascii_str = \
"""\
                      //x            \\    \n\
                      ||-   for x < 2|    \n\
                      ||y            |    \n\
    //x  for x > 0\\   ||             |    \n\
x + |<            | + |< 2           | + 1\n\
    \\\\y  otherwise/   ||y   for x > 2|    \n\
                      ||             |    \n\
                      ||1   otherwise|    \n\
                      \\\\             /    \
"""
    ucode_str = \
"""\
                      ⎛⎧x            ⎞    \n\
                      ⎜⎪─   for x < 2⎟    \n\
                      ⎜⎪y            ⎟    \n\
    ⎛⎧x  for x > 0⎞   ⎜⎪             ⎟    \n\
x + ⎜⎨            ⎟ + ⎜⎨ 2           ⎟ + 1\n\
    ⎝⎩y  otherwise⎠   ⎜⎪y   for x > 2⎟    \n\
                      ⎜⎪             ⎟    \n\
                      ⎜⎪1   otherwise⎟    \n\
                      ⎝⎩             ⎠    \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = x - Piecewise((x, x > 0), (y, True)) + Piecewise((x/y, x < 2),
    (y**2, x > 2), (1, True)) + 1
    ascii_str = \
"""\
                      //x            \\    \n\
                      ||-   for x < 2|    \n\
                      ||y            |    \n\
    //x  for x > 0\\   ||             |    \n\
x - |<            | + |< 2           | + 1\n\
    \\\\y  otherwise/   ||y   for x > 2|    \n\
                      ||             |    \n\
                      ||1   otherwise|    \n\
                      \\\\             /    \
"""
    ucode_str = \
"""\
                      ⎛⎧x            ⎞    \n\
                      ⎜⎪─   for x < 2⎟    \n\
                      ⎜⎪y            ⎟    \n\
    ⎛⎧x  for x > 0⎞   ⎜⎪             ⎟    \n\
x - ⎜⎨            ⎟ + ⎜⎨ 2           ⎟ + 1\n\
    ⎝⎩y  otherwise⎠   ⎜⎪y   for x > 2⎟    \n\
                      ⎜⎪             ⎟    \n\
                      ⎜⎪1   otherwise⎟    \n\
                      ⎝⎩             ⎠    \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = x*Piecewise((x, x > 0), (y, True))
    ascii_str = \
"""\
  //x  for x > 0\\\n\
x*|<            |\n\
  \\\\y  otherwise/\
"""
    ucode_str = \
"""\
  ⎛⎧x  for x > 0⎞\n\
x⋅⎜⎨            ⎟\n\
  ⎝⎩y  otherwise⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Piecewise((x, x > 0), (y, True))*Piecewise((x/y, x < 2), (y**2, x >
    2), (1, True))
    ascii_str = \
"""\
                //x            \\\n\
                ||-   for x < 2|\n\
                ||y            |\n\
//x  for x > 0\\ ||             |\n\
|<            |*|< 2           |\n\
\\\\y  otherwise/ ||y   for x > 2|\n\
                ||             |\n\
                ||1   otherwise|\n\
                \\\\             /\
"""
    ucode_str = \
"""\
                ⎛⎧x            ⎞\n\
                ⎜⎪─   for x < 2⎟\n\
                ⎜⎪y            ⎟\n\
⎛⎧x  for x > 0⎞ ⎜⎪             ⎟\n\
⎜⎨            ⎟⋅⎜⎨ 2           ⎟\n\
⎝⎩y  otherwise⎠ ⎜⎪y   for x > 2⎟\n\
                ⎜⎪             ⎟\n\
                ⎜⎪1   otherwise⎟\n\
                ⎝⎩             ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = -Piecewise((x, x > 0), (y, True))*Piecewise((x/y, x < 2), (y**2, x
        > 2), (1, True))
    ascii_str = \
"""\
                 //x            \\\n\
                 ||-   for x < 2|\n\
                 ||y            |\n\
 //x  for x > 0\\ ||             |\n\
-|<            |*|< 2           |\n\
 \\\\y  otherwise/ ||y   for x > 2|\n\
                 ||             |\n\
                 ||1   otherwise|\n\
                 \\\\             /\
"""
    ucode_str = \
"""\
                 ⎛⎧x            ⎞\n\
                 ⎜⎪─   for x < 2⎟\n\
                 ⎜⎪y            ⎟\n\
 ⎛⎧x  for x > 0⎞ ⎜⎪             ⎟\n\
-⎜⎨            ⎟⋅⎜⎨ 2           ⎟\n\
 ⎝⎩y  otherwise⎠ ⎜⎪y   for x > 2⎟\n\
                 ⎜⎪             ⎟\n\
                 ⎜⎪1   otherwise⎟\n\
                 ⎝⎩             ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Piecewise((0, Abs(1/y) < 1), (1, Abs(y) < 1), (y*meijerg(((2, 1),
        ()), ((), (1, 0)), 1/y), True))
    ascii_str = \
"""\
/                                 1     \n\
|            0               for --- < 1\n\
|                                |y|    \n\
|                                       \n\
<            1               for |y| < 1\n\
|                                       \n\
|   __0, 2 /1, 2       | 1\\             \n\
|y*/__     |           | -|   otherwise \n\
\\  \\_|2, 2 \\      0, 1 | y/             \
"""
    ucode_str = \
"""\
⎧                                 1     \n\
⎪            0               for ─── < 1\n\
⎪                                │y│    \n\
⎪                                       \n\
⎨            1               for │y│ < 1\n\
⎪                                       \n\
⎪  ╭─╮0, 2 ⎛1, 2       │ 1⎞             \n\
⎪y⋅│╶┐     ⎜           │ ─⎟   otherwise \n\
⎩  ╰─╯2, 2 ⎝      0, 1 │ y⎠             \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    # XXX: We have to use evaluate=False here because Piecewise._eval_power
    # denests the power.
    expr = Pow(Piecewise((x, x > 0), (y, True)), 2, evaluate=False)
    ascii_str = \
"""\
               2\n\
//x  for x > 0\\ \n\
|<            | \n\
\\\\y  otherwise/ \
"""
    ucode_str = \
"""\
               2\n\
⎛⎧x  for x > 0⎞ \n\
⎜⎨            ⎟ \n\
⎝⎩y  otherwise⎠ \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_ITE():
    expr = ITE(x, y, z)
    assert pretty(expr) == (
        '/y    for x  \n'
        '<            \n'
        '\\z  otherwise'
        )
    assert upretty(expr) == """\
⎧y    for x  \n\
⎨            \n\
⎩z  otherwise\
"""


def test_pretty_seq():
    expr = ()
    ascii_str = \
"""\
()\
"""
    ucode_str = \
"""\
()\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = []
    ascii_str = \
"""\
[]\
"""
    ucode_str = \
"""\
[]\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = {}
    expr_2 = {}
    ascii_str = \
"""\
{}\
"""
    ucode_str = \
"""\
{}\
"""
    assert pretty(expr) == ascii_str
    assert pretty(expr_2) == ascii_str
    assert upretty(expr) == ucode_str
    assert upretty(expr_2) == ucode_str

    expr = (1/x,)
    ascii_str = \
"""\
 1  \n\
(-,)\n\
 x  \
"""
    ucode_str = \
"""\
⎛1 ⎞\n\
⎜─,⎟\n\
⎝x ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = [x**2, 1/x, x, y, sin(th)**2/cos(ph)**2]
    ascii_str = \
"""\
                 2        \n\
  2  1        sin (theta) \n\
[x , -, x, y, -----------]\n\
     x            2       \n\
               cos (phi)  \
"""
    ucode_str = \
"""\
⎡                2   ⎤\n\
⎢ 2  1        sin (θ)⎥\n\
⎢x , ─, x, y, ───────⎥\n\
⎢    x           2   ⎥\n\
⎣             cos (φ)⎦\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (x**2, 1/x, x, y, sin(th)**2/cos(ph)**2)
    ascii_str = \
"""\
                 2        \n\
  2  1        sin (theta) \n\
(x , -, x, y, -----------)\n\
     x            2       \n\
               cos (phi)  \
"""
    ucode_str = \
"""\
⎛                2   ⎞\n\
⎜ 2  1        sin (θ)⎟\n\
⎜x , ─, x, y, ───────⎟\n\
⎜    x           2   ⎟\n\
⎝             cos (φ)⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Tuple(x**2, 1/x, x, y, sin(th)**2/cos(ph)**2)
    ascii_str = \
"""\
                 2        \n\
  2  1        sin (theta) \n\
(x , -, x, y, -----------)\n\
     x            2       \n\
               cos (phi)  \
"""
    ucode_str = \
"""\
⎛                2   ⎞\n\
⎜ 2  1        sin (θ)⎟\n\
⎜x , ─, x, y, ───────⎟\n\
⎜    x           2   ⎟\n\
⎝             cos (φ)⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = {x: sin(x)}
    expr_2 = Dict({x: sin(x)})
    ascii_str = \
"""\
{x: sin(x)}\
"""
    ucode_str = \
"""\
{x: sin(x)}\
"""
    assert pretty(expr) == ascii_str
    assert pretty(expr_2) == ascii_str
    assert upretty(expr) == ucode_str
    assert upretty(expr_2) == ucode_str

    expr = {1/x: 1/y, x: sin(x)**2}
    expr_2 = Dict({1/x: 1/y, x: sin(x)**2})
    ascii_str = \
"""\
 1  1        2    \n\
{-: -, x: sin (x)}\n\
 x  y             \
"""
    ucode_str = \
"""\
⎧1  1        2   ⎫\n\
⎨─: ─, x: sin (x)⎬\n\
⎩x  y            ⎭\
"""
    assert pretty(expr) == ascii_str
    assert pretty(expr_2) == ascii_str
    assert upretty(expr) == ucode_str
    assert upretty(expr_2) == ucode_str

    # There used to be a bug with pretty-printing sequences of even height.
    expr = [x**2]
    ascii_str = \
"""\
  2 \n\
[x ]\
"""
    ucode_str = \
"""\
⎡ 2⎤\n\
⎣x ⎦\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (x**2,)
    ascii_str = \
"""\
  2  \n\
(x ,)\
"""
    ucode_str = \
"""\
⎛ 2 ⎞\n\
⎝x ,⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Tuple(x**2)
    ascii_str = \
"""\
  2  \n\
(x ,)\
"""
    ucode_str = \
"""\
⎛ 2 ⎞\n\
⎝x ,⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = {x**2: 1}
    expr_2 = Dict({x**2: 1})
    ascii_str = \
"""\
  2    \n\
{x : 1}\
"""
    ucode_str = \
"""\
⎧ 2   ⎫\n\
⎨x : 1⎬\n\
⎩     ⎭\
"""
    assert pretty(expr) == ascii_str
    assert pretty(expr_2) == ascii_str
    assert upretty(expr) == ucode_str
    assert upretty(expr_2) == ucode_str


def test_any_object_in_sequence():
    # Cf. issue 5306
    b1 = Basic()
    b2 = Basic(Basic())

    expr = [b2, b1]
    assert pretty(expr) == "[Basic(Basic()), Basic()]"
    assert upretty(expr) == "[Basic(Basic()), Basic()]"

    expr = {b2, b1}
    assert pretty(expr) == "{Basic(), Basic(Basic())}"
    assert upretty(expr) == "{Basic(), Basic(Basic())}"

    expr = {b2: b1, b1: b2}
    expr2 = Dict({b2: b1, b1: b2})
    assert pretty(expr) == "{Basic(): Basic(Basic()), Basic(Basic()): Basic()}"
    assert pretty(
        expr2) == "{Basic(): Basic(Basic()), Basic(Basic()): Basic()}"
    assert upretty(
        expr) == "{Basic(): Basic(Basic()), Basic(Basic()): Basic()}"
    assert upretty(
        expr2) == "{Basic(): Basic(Basic()), Basic(Basic()): Basic()}"


def test_print_builtin_set():
    assert pretty(set()) == 'set()'
    assert upretty(set()) == 'set()'

    assert pretty(frozenset()) == 'frozenset()'
    assert upretty(frozenset()) == 'frozenset()'

    s1 = {1/x, x}
    s2 = frozenset(s1)

    assert pretty(s1) == \
"""\
 1    \n\
{-, x}
 x    \
"""
    assert upretty(s1) == \
"""\
⎧1   ⎫
⎨─, x⎬
⎩x   ⎭\
"""

    assert pretty(s2) == \
"""\
           1     \n\
frozenset({-, x})
           x     \
"""
    assert upretty(s2) == \
"""\
         ⎛⎧1   ⎫⎞
frozenset⎜⎨─, x⎬⎟
         ⎝⎩x   ⎭⎠\
"""


def test_pretty_sets():
    s = FiniteSet
    assert pretty(s(*[x*y, x**2])) == \
"""\
  2      \n\
{x , x*y}\
"""
    assert pretty(s(*range(1, 6))) == "{1, 2, 3, 4, 5}"
    assert pretty(s(*range(1, 13))) == "{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}"

    assert pretty({x*y, x**2}) == \
"""\
  2      \n\
{x , x*y}\
"""
    assert pretty(set(range(1, 6))) == "{1, 2, 3, 4, 5}"
    assert pretty(set(range(1, 13))) == \
        "{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}"

    assert pretty(frozenset([x*y, x**2])) == \
"""\
            2       \n\
frozenset({x , x*y})\
"""
    assert pretty(frozenset(range(1, 6))) == "frozenset({1, 2, 3, 4, 5})"
    assert pretty(frozenset(range(1, 13))) == \
        "frozenset({1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12})"

    assert pretty(Range(0, 3, 1)) == '{0, 1, 2}'

    ascii_str = '{0, 1, ..., 29}'
    ucode_str = '{0, 1, …, 29}'
    assert pretty(Range(0, 30, 1)) == ascii_str
    assert upretty(Range(0, 30, 1)) == ucode_str

    ascii_str = '{30, 29, ..., 2}'
    ucode_str = '{30, 29, …, 2}'
    assert pretty(Range(30, 1, -1)) == ascii_str
    assert upretty(Range(30, 1, -1)) == ucode_str

    ascii_str = '{0, 2, ...}'
    ucode_str = '{0, 2, …}'
    assert pretty(Range(0, oo, 2)) == ascii_str
    assert upretty(Range(0, oo, 2)) == ucode_str

    ascii_str = '{..., 2, 0}'
    ucode_str = '{…, 2, 0}'
    assert pretty(Range(oo, -2, -2)) == ascii_str
    assert upretty(Range(oo, -2, -2)) == ucode_str

    ascii_str = '{-2, -3, ...}'
    ucode_str = '{-2, -3, …}'
    assert pretty(Range(-2, -oo, -1)) == ascii_str
    assert upretty(Range(-2, -oo, -1)) == ucode_str


def test_pretty_SetExpr():
    iv = Interval(1, 3)
    se = SetExpr(iv)
    ascii_str = "SetExpr([1, 3])"
    ucode_str = "SetExpr([1, 3])"
    assert pretty(se) == ascii_str
    assert upretty(se) == ucode_str


def test_pretty_ImageSet():
    imgset = ImageSet(Lambda((x, y), x + y), {1, 2, 3}, {3, 4})
    ascii_str = '{x + y | x in {1, 2, 3}, y in {3, 4}}'
    ucode_str = '{x + y │ x ∊ {1, 2, 3}, y ∊ {3, 4}}'
    assert pretty(imgset) == ascii_str
    assert upretty(imgset) == ucode_str

    imgset = ImageSet(Lambda(((x, y),), x + y), ProductSet({1, 2, 3}, {3, 4}))
    ascii_str = '{x + y | (x, y) in {1, 2, 3} x {3, 4}}'
    ucode_str = '{x + y │ (x, y) ∊ {1, 2, 3} × {3, 4}}'
    assert pretty(imgset) == ascii_str
    assert upretty(imgset) == ucode_str

    imgset = ImageSet(Lambda(x, x**2), S.Naturals)
    ascii_str = '''\
  2                 \n\
{x  | x in Naturals}'''
    ucode_str = '''\
⎧ 2 │      ⎫\n\
⎨x  │ x ∊ ℕ⎬\n\
⎩   │      ⎭'''
    assert pretty(imgset) == ascii_str
    assert upretty(imgset) == ucode_str

    # TODO: The "x in N" parts below should be centered independently of the
    # 1/x**2 fraction
    imgset = ImageSet(Lambda(x, 1/x**2), S.Naturals)
    ascii_str = '''\
 1                  \n\
{-- | x in Naturals}
  2                 \n\
 x                  '''
    ucode_str = '''\
⎧1  │      ⎫\n\
⎪── │ x ∊ ℕ⎪\n\
⎨ 2 │      ⎬\n\
⎪x  │      ⎪\n\
⎩   │      ⎭'''
    assert pretty(imgset) == ascii_str
    assert upretty(imgset) == ucode_str

    imgset = ImageSet(Lambda((x, y), 1/(x + y)**2), S.Naturals, S.Naturals)
    ascii_str = '''\
    1                                    \n\
{-------- | x in Naturals, y in Naturals}
        2                                \n\
 (x + y)                                 '''
    ucode_str = '''\
⎧   1     │             ⎫
⎪──────── │ x ∊ ℕ, y ∊ ℕ⎪
⎨       2 │             ⎬
⎪(x + y)  │             ⎪
⎩         │             ⎭'''
    assert pretty(imgset) == ascii_str
    assert upretty(imgset) == ucode_str

    # issue 23449 centering issue
    assert upretty([Symbol("ihat") / (Symbol("i") + 1)]) == '''\
⎡  î  ⎤
⎢─────⎥
⎣i + 1⎦\
'''
    assert upretty(Matrix([Symbol("ihat"), Symbol("i") + 1])) == '''\
⎡  î  ⎤
⎢     ⎥
⎣i + 1⎦\
'''


def test_pretty_ConditionSet():
    ascii_str = '{x | x in (-oo, oo) and sin(x) = 0}'
    ucode_str = '{x │ x ∊ ℝ ∧ (sin(x) = 0)}'
    assert pretty(ConditionSet(x, Eq(sin(x), 0), S.Reals)) == ascii_str
    assert upretty(ConditionSet(x, Eq(sin(x), 0), S.Reals)) == ucode_str

    assert pretty(ConditionSet(x, Contains(x, S.Reals, evaluate=False), FiniteSet(1))) == '{1}'
    assert upretty(ConditionSet(x, Contains(x, S.Reals, evaluate=False), FiniteSet(1))) == '{1}'

    assert pretty(ConditionSet(x, And(x > 1, x < -1), FiniteSet(1, 2, 3))) == "EmptySet"
    assert upretty(ConditionSet(x, And(x > 1, x < -1), FiniteSet(1, 2, 3))) == "∅"

    assert pretty(ConditionSet(x, Or(x > 1, x < -1), FiniteSet(1, 2))) == '{2}'
    assert upretty(ConditionSet(x, Or(x > 1, x < -1), FiniteSet(1, 2))) == '{2}'

    condset = ConditionSet(x, 1/x**2 > 0)
    ascii_str = '''\
     1      \n\
{x | -- > 0}
      2     \n\
     x      '''
    ucode_str = '''\
⎧  │ ⎛1     ⎞⎫
⎪x │ ⎜── > 0⎟⎪
⎨  │ ⎜ 2    ⎟⎬
⎪  │ ⎝x     ⎠⎪
⎩  │         ⎭'''
    assert pretty(condset) == ascii_str
    assert upretty(condset) == ucode_str

    condset = ConditionSet(x, 1/x**2 > 0, S.Reals)
    ascii_str = '''\
                        1      \n\
{x | x in (-oo, oo) and -- > 0}
                         2     \n\
                        x      '''
    ucode_str = '''\
⎧  │         ⎛1     ⎞⎫
⎪x │ x ∊ ℝ ∧ ⎜── > 0⎟⎪
⎨  │         ⎜ 2    ⎟⎬
⎪  │         ⎝x     ⎠⎪
⎩  │                 ⎭'''
    assert pretty(condset) == ascii_str
    assert upretty(condset) == ucode_str


def test_pretty_ComplexRegion():
    from sympy.sets.fancysets import ComplexRegion
    cregion = ComplexRegion(Interval(3, 5)*Interval(4, 6))
    ascii_str = '{x + y*I | x, y in [3, 5] x [4, 6]}'
    ucode_str = '{x + y⋅ⅈ │ x, y ∊ [3, 5] × [4, 6]}'
    assert pretty(cregion) == ascii_str
    assert upretty(cregion) == ucode_str

    cregion = ComplexRegion(Interval(0, 1)*Interval(0, 2*pi), polar=True)
    ascii_str = '{r*(I*sin(theta) + cos(theta)) | r, theta in [0, 1] x [0, 2*pi)}'
    ucode_str = '{r⋅(ⅈ⋅sin(θ) + cos(θ)) │ r, θ ∊ [0, 1] × [0, 2⋅π)}'
    assert pretty(cregion) == ascii_str
    assert upretty(cregion) == ucode_str

    cregion = ComplexRegion(Interval(3, 1/a**2)*Interval(4, 6))
    ascii_str = '''\
                       1            \n\
{x + y*I | x, y in [3, --] x [4, 6]}
                        2           \n\
                       a            '''
    ucode_str = '''\
⎧        │        ⎡   1 ⎤         ⎫
⎪x + y⋅ⅈ │ x, y ∊ ⎢3, ──⎥ × [4, 6]⎪
⎨        │        ⎢    2⎥         ⎬
⎪        │        ⎣   a ⎦         ⎪
⎩        │                        ⎭'''
    assert pretty(cregion) == ascii_str
    assert upretty(cregion) == ucode_str

    cregion = ComplexRegion(Interval(0, 1/a**2)*Interval(0, 2*pi), polar=True)
    ascii_str = '''\
                                                 1               \n\
{r*(I*sin(theta) + cos(theta)) | r, theta in [0, --] x [0, 2*pi)}
                                                  2              \n\
                                                 a               '''
    ucode_str = '''\
⎧                      │        ⎡   1 ⎤           ⎫
⎪r⋅(ⅈ⋅sin(θ) + cos(θ)) │ r, θ ∊ ⎢0, ──⎥ × [0, 2⋅π)⎪
⎨                      │        ⎢    2⎥           ⎬
⎪                      │        ⎣   a ⎦           ⎪
⎩                      │                          ⎭'''
    assert pretty(cregion) == ascii_str
    assert upretty(cregion) == ucode_str


def test_pretty_Union_issue_10414():
    a, b = Interval(2, 3), Interval(4, 7)
    ucode_str = '[2, 3] ∪ [4, 7]'
    ascii_str = '[2, 3] U [4, 7]'
    assert upretty(Union(a, b)) == ucode_str
    assert pretty(Union(a, b)) == ascii_str


def test_pretty_Intersection_issue_10414():
    x, y, z, w = symbols('x, y, z, w')
    a, b = Interval(x, y), Interval(z, w)
    ucode_str = '[x, y] ∩ [z, w]'
    ascii_str = '[x, y] n [z, w]'
    assert upretty(Intersection(a, b)) == ucode_str
    assert pretty(Intersection(a, b)) == ascii_str


def test_ProductSet_exponent():
    ucode_str = '      1\n[0, 1] '
    assert upretty(Interval(0, 1)**1) == ucode_str
    ucode_str = '      2\n[0, 1] '
    assert upretty(Interval(0, 1)**2) == ucode_str


def test_ProductSet_parenthesis():
    ucode_str = '([4, 7] × {1, 2}) ∪ ([2, 3] × [4, 7])'

    a, b = Interval(2, 3), Interval(4, 7)
    assert upretty(Union(a*b, b*FiniteSet(1, 2))) == ucode_str


def test_ProductSet_prod_char_issue_10413():
    ascii_str = '[2, 3] x [4, 7]'
    ucode_str = '[2, 3] × [4, 7]'

    a, b = Interval(2, 3), Interval(4, 7)
    assert pretty(a*b) == ascii_str
    assert upretty(a*b) == ucode_str


def test_pretty_sequences():
    s1 = SeqFormula(a**2, (0, oo))
    s2 = SeqPer((1, 2))

    ascii_str = '[0, 1, 4, 9, ...]'
    ucode_str = '[0, 1, 4, 9, …]'

    assert pretty(s1) == ascii_str
    assert upretty(s1) == ucode_str

    ascii_str = '[1, 2, 1, 2, ...]'
    ucode_str = '[1, 2, 1, 2, …]'
    assert pretty(s2) == ascii_str
    assert upretty(s2) == ucode_str

    s3 = SeqFormula(a**2, (0, 2))
    s4 = SeqPer((1, 2), (0, 2))

    ascii_str = '[0, 1, 4]'
    ucode_str = '[0, 1, 4]'

    assert pretty(s3) == ascii_str
    assert upretty(s3) == ucode_str

    ascii_str = '[1, 2, 1]'
    ucode_str = '[1, 2, 1]'
    assert pretty(s4) == ascii_str
    assert upretty(s4) == ucode_str

    s5 = SeqFormula(a**2, (-oo, 0))
    s6 = SeqPer((1, 2), (-oo, 0))

    ascii_str = '[..., 9, 4, 1, 0]'
    ucode_str = '[…, 9, 4, 1, 0]'

    assert pretty(s5) == ascii_str
    assert upretty(s5) == ucode_str

    ascii_str = '[..., 2, 1, 2, 1]'
    ucode_str = '[…, 2, 1, 2, 1]'
    assert pretty(s6) == ascii_str
    assert upretty(s6) == ucode_str

    ascii_str = '[1, 3, 5, 11, ...]'
    ucode_str = '[1, 3, 5, 11, …]'

    assert pretty(SeqAdd(s1, s2)) == ascii_str
    assert upretty(SeqAdd(s1, s2)) == ucode_str

    ascii_str = '[1, 3, 5]'
    ucode_str = '[1, 3, 5]'

    assert pretty(SeqAdd(s3, s4)) == ascii_str
    assert upretty(SeqAdd(s3, s4)) == ucode_str

    ascii_str = '[..., 11, 5, 3, 1]'
    ucode_str = '[…, 11, 5, 3, 1]'

    assert pretty(SeqAdd(s5, s6)) == ascii_str
    assert upretty(SeqAdd(s5, s6)) == ucode_str

    ascii_str = '[0, 2, 4, 18, ...]'
    ucode_str = '[0, 2, 4, 18, …]'

    assert pretty(SeqMul(s1, s2)) == ascii_str
    assert upretty(SeqMul(s1, s2)) == ucode_str

    ascii_str = '[0, 2, 4]'
    ucode_str = '[0, 2, 4]'

    assert pretty(SeqMul(s3, s4)) == ascii_str
    assert upretty(SeqMul(s3, s4)) == ucode_str

    ascii_str = '[..., 18, 4, 2, 0]'
    ucode_str = '[…, 18, 4, 2, 0]'

    assert pretty(SeqMul(s5, s6)) == ascii_str
    assert upretty(SeqMul(s5, s6)) == ucode_str

    # Sequences with symbolic limits, issue 12629
    s7 = SeqFormula(a**2, (a, 0, x))
    raises(NotImplementedError, lambda: pretty(s7))
    raises(NotImplementedError, lambda: upretty(s7))

    b = Symbol('b')
    s8 = SeqFormula(b*a**2, (a, 0, 2))
    ascii_str = '[0, b, 4*b]'
    ucode_str = '[0, b, 4⋅b]'
    assert pretty(s8) == ascii_str
    assert upretty(s8) == ucode_str


def test_pretty_FourierSeries():
    f = fourier_series(x, (x, -pi, pi))

    ascii_str = \
"""\
                      2*sin(3*x)      \n\
2*sin(x) - sin(2*x) + ---------- + ...\n\
                          3           \
"""

    ucode_str = \
"""\
                      2⋅sin(3⋅x)    \n\
2⋅sin(x) - sin(2⋅x) + ────────── + …\n\
                          3         \
"""

    assert pretty(f) == ascii_str
    assert upretty(f) == ucode_str


def test_pretty_FormalPowerSeries():
    f = fps(log(1 + x))


    ascii_str = \
"""\
 oo              \n\
____             \n\
\\   `            \n\
 \\         -k  k \n\
  \\   -(-1)  *x  \n\
  /   -----------\n\
 /         k     \n\
/___,            \n\
k = 1            \
"""

    ucode_str = \
"""\
 ∞               \n\
____             \n\
╲                \n\
 ╲         -k  k \n\
  ╲   -(-1)  ⋅x  \n\
  ╱   ───────────\n\
 ╱         k     \n\
╱                \n\
‾‾‾‾             \n\
k = 1            \
"""

    assert pretty(f) == ascii_str
    assert upretty(f) == ucode_str


def test_pretty_limits():
    expr = Limit(x, x, oo)
    ascii_str = \
"""\
 lim x\n\
x->oo \
"""
    ucode_str = \
"""\
lim x\n\
x─→∞ \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(x**2, x, 0)
    ascii_str = \
"""\
      2\n\
 lim x \n\
x->0+  \
"""
    ucode_str = \
"""\
      2\n\
 lim x \n\
x─→0⁺  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(1/x, x, 0)
    ascii_str = \
"""\
     1\n\
 lim -\n\
x->0+x\
"""
    ucode_str = \
"""\
     1\n\
 lim ─\n\
x─→0⁺x\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(sin(x)/x, x, 0)
    ascii_str = \
"""\
     /sin(x)\\\n\
 lim |------|\n\
x->0+\\  x   /\
"""
    ucode_str = \
"""\
     ⎛sin(x)⎞\n\
 lim ⎜──────⎟\n\
x─→0⁺⎝  x   ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(sin(x)/x, x, 0, "-")
    ascii_str = \
"""\
     /sin(x)\\\n\
 lim |------|\n\
x->0-\\  x   /\
"""
    ucode_str = \
"""\
     ⎛sin(x)⎞\n\
 lim ⎜──────⎟\n\
x─→0⁻⎝  x   ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(x + sin(x), x, 0)
    ascii_str = \
"""\
 lim (x + sin(x))\n\
x->0+            \
"""
    ucode_str = \
"""\
 lim (x + sin(x))\n\
x─→0⁺            \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(x, x, 0)**2
    ascii_str = \
"""\
        2\n\
/ lim x\\ \n\
\\x->0+ / \
"""
    ucode_str = \
"""\
        2\n\
⎛ lim x⎞ \n\
⎝x─→0⁺ ⎠ \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(x*Limit(y/2,y,0), x, 0)
    ascii_str = \
"""\
     /       /y\\\\\n\
 lim |x* lim |-||\n\
x->0+\\  y->0+\\2//\
"""
    ucode_str = \
"""\
     ⎛       ⎛y⎞⎞\n\
 lim ⎜x⋅ lim ⎜─⎟⎟\n\
x─→0⁺⎝  y─→0⁺⎝2⎠⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = 2*Limit(x*Limit(y/2,y,0), x, 0)
    ascii_str = \
"""\
       /       /y\\\\\n\
2* lim |x* lim |-||\n\
  x->0+\\  y->0+\\2//\
"""
    ucode_str = \
"""\
       ⎛       ⎛y⎞⎞\n\
2⋅ lim ⎜x⋅ lim ⎜─⎟⎟\n\
  x─→0⁺⎝  y─→0⁺⎝2⎠⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Limit(sin(x), x, 0, dir='+-')
    ascii_str = \
"""\
lim sin(x)\n\
x->0      \
"""
    ucode_str = \
"""\
lim sin(x)\n\
x─→0      \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_ComplexRootOf():
    expr = rootof(x**5 + 11*x - 2, 0)
    ascii_str = \
"""\
       / 5              \\\n\
CRootOf\\x  + 11*x - 2, 0/\
"""
    ucode_str = \
"""\
       ⎛ 5              ⎞\n\
CRootOf⎝x  + 11⋅x - 2, 0⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_RootSum():
    expr = RootSum(x**5 + 11*x - 2, auto=False)
    ascii_str = \
"""\
       / 5           \\\n\
RootSum\\x  + 11*x - 2/\
"""
    ucode_str = \
"""\
       ⎛ 5           ⎞\n\
RootSum⎝x  + 11⋅x - 2⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = RootSum(x**5 + 11*x - 2, Lambda(z, exp(z)))
    ascii_str = \
"""\
       / 5                   z\\\n\
RootSum\\x  + 11*x - 2, z -> e /\
"""
    ucode_str = \
"""\
       ⎛ 5                  z⎞\n\
RootSum⎝x  + 11⋅x - 2, z ↦ ℯ ⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_GroebnerBasis():
    expr = groebner([], x, y)

    ascii_str = \
"""\
GroebnerBasis([], x, y, domain=ZZ, order=lex)\
"""
    ucode_str = \
"""\
GroebnerBasis([], x, y, domain=ℤ, order=lex)\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    F = [x**2 - 3*y - x + 1, y**2 - 2*x + y - 1]
    expr = groebner(F, x, y, order='grlex')

    ascii_str = \
"""\
             /[ 2                 2              ]                              \\\n\
GroebnerBasis\\[x  - x - 3*y + 1, y  - 2*x + y - 1], x, y, domain=ZZ, order=grlex/\
"""
    ucode_str = \
"""\
             ⎛⎡ 2                 2              ⎤                             ⎞\n\
GroebnerBasis⎝⎣x  - x - 3⋅y + 1, y  - 2⋅x + y - 1⎦, x, y, domain=ℤ, order=grlex⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = expr.fglm('lex')

    ascii_str = \
"""\
             /[       2           4      3      2           ]                            \\\n\
GroebnerBasis\\[2*x - y  - y + 1, y  + 2*y  - 3*y  - 16*y + 7], x, y, domain=ZZ, order=lex/\
"""
    ucode_str = \
"""\
             ⎛⎡       2           4      3      2           ⎤                           ⎞\n\
GroebnerBasis⎝⎣2⋅x - y  - y + 1, y  + 2⋅y  - 3⋅y  - 16⋅y + 7⎦, x, y, domain=ℤ, order=lex⎠\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_UniversalSet():
    assert pretty(S.UniversalSet) == "UniversalSet"
    assert upretty(S.UniversalSet) == '𝕌'


def test_pretty_Boolean():
    expr = Not(x, evaluate=False)

    assert pretty(expr) == "Not(x)"
    assert upretty(expr) == "¬x"

    expr = And(x, y)

    assert pretty(expr) == "And(x, y)"
    assert upretty(expr) == "x ∧ y"

    expr = Or(x, y)

    assert pretty(expr) == "Or(x, y)"
    assert upretty(expr) == "x ∨ y"

    syms = symbols('a:f')
    expr = And(*syms)

    assert pretty(expr) == "And(a, b, c, d, e, f)"
    assert upretty(expr) == "a ∧ b ∧ c ∧ d ∧ e ∧ f"

    expr = Or(*syms)

    assert pretty(expr) == "Or(a, b, c, d, e, f)"
    assert upretty(expr) == "a ∨ b ∨ c ∨ d ∨ e ∨ f"

    expr = Xor(x, y, evaluate=False)

    assert pretty(expr) == "Xor(x, y)"
    assert upretty(expr) == "x ⊻ y"

    expr = Nand(x, y, evaluate=False)

    assert pretty(expr) == "Nand(x, y)"
    assert upretty(expr) == "x ⊼ y"

    expr = Nor(x, y, evaluate=False)

    assert pretty(expr) == "Nor(x, y)"
    assert upretty(expr) == "x ⊽ y"

    expr = Implies(x, y, evaluate=False)

    assert pretty(expr) == "Implies(x, y)"
    assert upretty(expr) == "x → y"

    # don't sort args
    expr = Implies(y, x, evaluate=False)

    assert pretty(expr) == "Implies(y, x)"
    assert upretty(expr) == "y → x"

    expr = Equivalent(x, y, evaluate=False)

    assert pretty(expr) == "Equivalent(x, y)"
    assert upretty(expr) == "x ⇔ y"

    expr = Equivalent(y, x, evaluate=False)

    assert pretty(expr) == "Equivalent(x, y)"
    assert upretty(expr) == "x ⇔ y"


def test_pretty_Domain():
    expr = FF(23)

    assert pretty(expr) == "GF(23)"
    assert upretty(expr) == "ℤ₂₃"

    expr = ZZ

    assert pretty(expr) == "ZZ"
    assert upretty(expr) == "ℤ"

    expr = QQ

    assert pretty(expr) == "QQ"
    assert upretty(expr) == "ℚ"

    expr = RR

    assert pretty(expr) == "RR"
    assert upretty(expr) == "ℝ"

    expr = QQ[x]

    assert pretty(expr) == "QQ[x]"
    assert upretty(expr) == "ℚ[x]"

    expr = QQ[x, y]

    assert pretty(expr) == "QQ[x, y]"
    assert upretty(expr) == "ℚ[x, y]"

    expr = ZZ.frac_field(x)

    assert pretty(expr) == "ZZ(x)"
    assert upretty(expr) == "ℤ(x)"

    expr = ZZ.frac_field(x, y)

    assert pretty(expr) == "ZZ(x, y)"
    assert upretty(expr) == "ℤ(x, y)"

    expr = QQ.poly_ring(x, y, order=grlex)

    assert pretty(expr) == "QQ[x, y, order=grlex]"
    assert upretty(expr) == "ℚ[x, y, order=grlex]"

    expr = QQ.poly_ring(x, y, order=ilex)

    assert pretty(expr) == "QQ[x, y, order=ilex]"
    assert upretty(expr) == "ℚ[x, y, order=ilex]"


def test_pretty_prec():
    assert xpretty(S("0.3"), full_prec=True, wrap_line=False) == "0.300000000000000"
    assert xpretty(S("0.3"), full_prec="auto", wrap_line=False) == "0.300000000000000"
    assert xpretty(S("0.3"), full_prec=False, wrap_line=False) == "0.3"
    assert xpretty(S("0.3")*x, full_prec=True, use_unicode=False, wrap_line=False) in [
        "0.300000000000000*x",
        "x*0.300000000000000"
    ]
    assert xpretty(S("0.3")*x, full_prec="auto", use_unicode=False, wrap_line=False) in [
        "0.3*x",
        "x*0.3"
    ]
    assert xpretty(S("0.3")*x, full_prec=False, use_unicode=False, wrap_line=False) in [
        "0.3*x",
        "x*0.3"
    ]


def test_pprint():
    import sys
    from io import StringIO
    fd = StringIO()
    sso = sys.stdout
    sys.stdout = fd
    try:
        pprint(pi, use_unicode=False, wrap_line=False)
    finally:
        sys.stdout = sso
    assert fd.getvalue() == 'pi\n'


def test_pretty_class():
    """Test that the printer dispatcher correctly handles classes."""
    class C:
        pass   # C has no .__class__ and this was causing problems

    class D:
        pass

    assert pretty( C ) == str( C )
    assert pretty( D ) == str( D )


def test_pretty_no_wrap_line():
    huge_expr = 0
    for i in range(20):
        huge_expr += i*sin(i + x)
    assert xpretty(huge_expr            ).find('\n') != -1
    assert xpretty(huge_expr, wrap_line=False).find('\n') == -1


def test_settings():
    raises(TypeError, lambda: pretty(S(4), method="garbage"))


def test_pretty_sum():
    from sympy.abc import x, a, b, k, m, n

    expr = Sum(k**k, (k, 0, n))
    ascii_str = \
"""\
 n      \n\
___     \n\
\\  `    \n\
 \\     k\n\
 /    k \n\
/__,    \n\
k = 0   \
"""
    ucode_str = \
"""\
  n     \n\
 ___    \n\
 ╲      \n\
  ╲    k\n\
  ╱   k \n\
 ╱      \n\
 ‾‾‾    \n\
k = 0   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(k**k, (k, oo, n))
    ascii_str = \
"""\
  n      \n\
 ___     \n\
 \\  `    \n\
  \\     k\n\
  /    k \n\
 /__,    \n\
k = oo   \
"""
    ucode_str = \
"""\
  n     \n\
 ___    \n\
 ╲      \n\
  ╲    k\n\
  ╱   k \n\
 ╱      \n\
 ‾‾‾    \n\
k = ∞   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(k**(Integral(x**n, (x, -oo, oo))), (k, 0, n**n))
    ascii_str = \
"""\
   n              \n\
  n               \n\
______            \n\
\\     `           \n\
 \\        oo      \n\
  \\        /      \n\
   \\      |       \n\
    \\     |   n   \n\
     )    |  x  dx\n\
    /     |       \n\
   /     /        \n\
  /      -oo      \n\
 /      k         \n\
/_____,           \n\
 k = 0            \
"""
    ucode_str = \
"""\
   n            \n\
  n             \n\
______          \n\
╲               \n\
 ╲              \n\
  ╲     ∞       \n\
   ╲    ⌠       \n\
    ╲   ⎮   n   \n\
    ╱   ⎮  x  dx\n\
   ╱    ⌡       \n\
  ╱     -∞      \n\
 ╱     k        \n\
╱               \n\
‾‾‾‾‾‾          \n\
k = 0           \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(k**(
        Integral(x**n, (x, -oo, oo))), (k, 0, Integral(x**x, (x, -oo, oo))))
    ascii_str = \
"""\
 oo                 \n\
  /                 \n\
 |                  \n\
 |   x              \n\
 |  x  dx           \n\
 |                  \n\
/                   \n\
-oo                 \n\
 ______             \n\
 \\     `            \n\
  \\         oo      \n\
   \\         /      \n\
    \\       |       \n\
     \\      |   n   \n\
      )     |  x  dx\n\
     /      |       \n\
    /      /        \n\
   /       -oo      \n\
  /       k         \n\
 /_____,            \n\
  k = 0             \
"""
    ucode_str = \
"""\
∞                 \n\
⌠                 \n\
⎮   x             \n\
⎮  x  dx          \n\
⌡                 \n\
-∞                \n\
 ______           \n\
 ╲                \n\
  ╲               \n\
   ╲      ∞       \n\
    ╲     ⌠       \n\
     ╲    ⎮   n   \n\
     ╱    ⎮  x  dx\n\
    ╱     ⌡       \n\
   ╱      -∞      \n\
  ╱      k        \n\
 ╱                \n\
 ‾‾‾‾‾‾           \n\
 k = 0            \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(k**(Integral(x**n, (x, -oo, oo))), (
        k, x + n + x**2 + n**2 + (x/n) + (1/x), Integral(x**x, (x, -oo, oo))))
    ascii_str = \
"""\
          oo                          \n\
           /                          \n\
          |                           \n\
          |   x                       \n\
          |  x  dx                    \n\
          |                           \n\
         /                            \n\
         -oo                          \n\
          ______                      \n\
          \\     `                     \n\
           \\                  oo      \n\
            \\                  /      \n\
             \\                |       \n\
              \\               |   n   \n\
               )              |  x  dx\n\
              /               |       \n\
             /               /        \n\
            /                -oo      \n\
           /                k         \n\
          /_____,                     \n\
     2        2       1   x           \n\
k = n  + n + x  + x + - + -           \n\
                      x   n           \
"""
    ucode_str = \
"""\
         ∞                           \n\
         ⌠                           \n\
         ⎮   x                       \n\
         ⎮  x  dx                    \n\
         ⌡                           \n\
         -∞                          \n\
          ______                     \n\
          ╲                          \n\
           ╲                         \n\
            ╲                ∞       \n\
             ╲               ⌠       \n\
              ╲              ⎮   n   \n\
              ╱              ⎮  x  dx\n\
             ╱               ⌡       \n\
            ╱                -∞      \n\
           ╱                k        \n\
          ╱                          \n\
          ‾‾‾‾‾‾                     \n\
     2        2       1   x          \n\
k = n  + n + x  + x + ─ + ─          \n\
                      x   n          \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(k**(
        Integral(x**n, (x, -oo, oo))), (k, 0, x + n + x**2 + n**2 + (x/n) + (1/x)))
    ascii_str = \
"""\
 2        2       1   x           \n\
n  + n + x  + x + - + -           \n\
                  x   n           \n\
        ______                    \n\
        \\     `                   \n\
         \\                oo      \n\
          \\                /      \n\
           \\              |       \n\
            \\             |   n   \n\
             )            |  x  dx\n\
            /             |       \n\
           /             /        \n\
          /              -oo      \n\
         /              k         \n\
        /_____,                   \n\
         k = 0                    \
"""
    ucode_str = \
"""\
 2        2       1   x          \n\
n  + n + x  + x + ─ + ─          \n\
                  x   n          \n\
        ______                   \n\
        ╲                        \n\
         ╲                       \n\
          ╲              ∞       \n\
           ╲             ⌠       \n\
            ╲            ⎮   n   \n\
            ╱            ⎮  x  dx\n\
           ╱             ⌡       \n\
          ╱              -∞      \n\
         ╱              k        \n\
        ╱                        \n\
        ‾‾‾‾‾‾                   \n\
         k = 0                   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(x, (x, 0, oo))
    ascii_str = \
"""\
 oo    \n\
 __    \n\
 \\ `   \n\
  )   x\n\
 /_,   \n\
x = 0  \
"""
    ucode_str = \
"""\
  ∞    \n\
 ___   \n\
 ╲     \n\
  ╲    \n\
  ╱   x\n\
 ╱     \n\
 ‾‾‾   \n\
x = 0  \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(x**2, (x, 0, oo))
    ascii_str = \
"""\
 oo     \n\
___     \n\
\\  `    \n\
 \\     2\n\
 /    x \n\
/__,    \n\
x = 0   \
"""
    ucode_str = \
"""\
  ∞     \n\
 ___    \n\
 ╲      \n\
  ╲    2\n\
  ╱   x \n\
 ╱      \n\
 ‾‾‾    \n\
x = 0   \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(x/2, (x, 0, oo))
    ascii_str = \
"""\
 oo    \n\
___    \n\
\\  `   \n\
 \\    x\n\
  )   -\n\
 /    2\n\
/__,   \n\
x = 0  \
"""
    ucode_str = \
"""\
 ∞     \n\
____   \n\
╲      \n\
 ╲     \n\
  ╲   x\n\
  ╱   ─\n\
 ╱    2\n\
╱      \n\
‾‾‾‾   \n\
x = 0  \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(x**3/2, (x, 0, oo))
    ascii_str = \
"""\
 oo     \n\
____    \n\
\\   `   \n\
 \\     3\n\
  \\   x \n\
  /   --\n\
 /    2 \n\
/___,   \n\
x = 0   \
"""
    ucode_str = \
"""\
 ∞      \n\
____    \n\
╲       \n\
 ╲     3\n\
  ╲   x \n\
  ╱   ──\n\
 ╱    2 \n\
╱       \n\
‾‾‾‾    \n\
x = 0   \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum((x**3*y**(x/2))**n, (x, 0, oo))
    ascii_str = \
"""\
 oo           \n\
____          \n\
\\   `         \n\
 \\           n\n\
  \\   /    x\\ \n\
   )  |    -| \n\
  /   | 3  2| \n\
 /    \\x *y / \n\
/___,         \n\
x = 0         \
"""
    ucode_str = \
"""\
  ∞           \n\
_____         \n\
╲             \n\
 ╲            \n\
  ╲          n\n\
   ╲  ⎛    x⎞ \n\
   ╱  ⎜    ─⎟ \n\
  ╱   ⎜ 3  2⎟ \n\
 ╱    ⎝x ⋅y ⎠ \n\
╱             \n\
‾‾‾‾‾         \n\
x = 0         \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(1/x**2, (x, 0, oo))
    ascii_str = \
"""\
 oo     \n\
____    \n\
\\   `   \n\
 \\    1 \n\
  \\   --\n\
  /    2\n\
 /    x \n\
/___,   \n\
x = 0   \
"""
    ucode_str = \
"""\
 ∞      \n\
____    \n\
╲       \n\
 ╲    1 \n\
  ╲   ──\n\
  ╱    2\n\
 ╱    x \n\
╱       \n\
‾‾‾‾    \n\
x = 0   \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(1/y**(a/b), (x, 0, oo))
    ascii_str = \
"""\
 oo       \n\
____      \n\
\\   `     \n\
 \\     -a \n\
  \\    ---\n\
  /     b \n\
 /    y   \n\
/___,     \n\
x = 0     \
"""
    ucode_str = \
"""\
 ∞        \n\
____      \n\
╲         \n\
 ╲     -a \n\
  ╲    ───\n\
  ╱     b \n\
 ╱    y   \n\
╱         \n\
‾‾‾‾      \n\
x = 0     \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Sum(1/y**(a/b), (x, 0, oo), (y, 1, 2))
    ascii_str = \
"""\
  2     oo     \n\
____  ____     \n\
\\   ` \\   `    \n\
 \\     \\     -a\n\
  \\     \\    --\n\
  /     /    b \n\
 /     /    y  \n\
/___, /___,    \n\
y = 1 x = 0    \
"""
    ucode_str = \
"""\
  2     ∞      \n\
____  ____     \n\
╲     ╲        \n\
 ╲     ╲     -a\n\
  ╲     ╲    ──\n\
  ╱     ╱    b \n\
 ╱     ╱    y  \n\
╱     ╱        \n\
‾‾‾‾  ‾‾‾‾     \n\
y = 1 x = 0    \
"""
    expr = Sum(1/(1 + 1/(
        1 + 1/k)) + 1, (k, 111, 1 + 1/n), (k, 1/(1 + m), oo)) + 1/(1 + 1/k)
    ascii_str = \
"""\
              1                          \n\
          1 + -                          \n\
   oo         n                          \n\
 _____    _____                          \n\
 \\    `   \\    `                         \n\
  \\        \\      /        1    \\        \n\
   \\        \\     |1 + ---------|        \n\
    \\        \\    |          1  |     1  \n\
     )        )   |    1 + -----| + -----\n\
    /        /    |            1|       1\n\
   /        /     |        1 + -|   1 + -\n\
  /        /      \\            k/       k\n\
 /____,   /____,                         \n\
      1   k = 111                        \n\
k = -----                                \n\
    m + 1                                \
"""
    ucode_str = \
"""\
              1                          \n\
          1 + ─                          \n\
   ∞          n                          \n\
 ______   ______                         \n\
 ╲        ╲                              \n\
  ╲        ╲                             \n\
   ╲        ╲     ⎛        1    ⎞        \n\
    ╲        ╲    ⎜1 + ─────────⎟        \n\
     ╲        ╲   ⎜          1  ⎟     1  \n\
     ╱        ╱   ⎜    1 + ─────⎟ + ─────\n\
    ╱        ╱    ⎜            1⎟       1\n\
   ╱        ╱     ⎜        1 + ─⎟   1 + ─\n\
  ╱        ╱      ⎝            k⎠       k\n\
 ╱        ╱                              \n\
 ‾‾‾‾‾‾   ‾‾‾‾‾‾                         \n\
      1   k = 111                        \n\
k = ─────                                \n\
    m + 1                                \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_units():
    expr = joule
    ascii_str1 = \
"""\
              2\n\
kilogram*meter \n\
---------------\n\
          2    \n\
    second     \
"""
    unicode_str1 = \
"""\
              2\n\
kilogram⋅meter \n\
───────────────\n\
          2    \n\
    second     \
"""

    ascii_str2 = \
"""\
                    2\n\
3*x*y*kilogram*meter \n\
---------------------\n\
             2       \n\
       second        \
"""
    unicode_str2 = \
"""\
                    2\n\
3⋅x⋅y⋅kilogram⋅meter \n\
─────────────────────\n\
             2       \n\
       second        \
"""

    from sympy.physics.units import kg, m, s
    assert upretty(expr) == "joule"
    assert pretty(expr) == "joule"
    assert upretty(expr.convert_to(kg*m**2/s**2)) == unicode_str1
    assert pretty(expr.convert_to(kg*m**2/s**2)) == ascii_str1
    assert upretty(3*kg*x*m**2*y/s**2) == unicode_str2
    assert pretty(3*kg*x*m**2*y/s**2) == ascii_str2


def test_pretty_Subs():
    f = Function('f')
    expr = Subs(f(x), x, ph**2)
    ascii_str = \
"""\
(f(x))|     2\n\
      |x=phi \
"""
    unicode_str = \
"""\
(f(x))│   2\n\
      │x=φ \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == unicode_str

    expr = Subs(f(x).diff(x), x, 0)
    ascii_str = \
"""\
/d       \\|   \n\
|--(f(x))||   \n\
\\dx      /|x=0\
"""
    unicode_str = \
"""\
⎛d       ⎞│   \n\
⎜──(f(x))⎟│   \n\
⎝dx      ⎠│x=0\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == unicode_str

    expr = Subs(f(x).diff(x)/y, (x, y), (0, Rational(1, 2)))
    ascii_str = \
"""\
/d       \\|          \n\
|--(f(x))||          \n\
|dx      ||          \n\
|--------||          \n\
\\   y    /|x=0, y=1/2\
"""
    unicode_str = \
"""\
⎛d       ⎞│          \n\
⎜──(f(x))⎟│          \n\
⎜dx      ⎟│          \n\
⎜────────⎟│          \n\
⎝   y    ⎠│x=0, y=1/2\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == unicode_str


def test_gammas():
    assert upretty(lowergamma(x, y)) == "γ(x, y)"
    assert upretty(uppergamma(x, y)) == "Γ(x, y)"
    assert xpretty(gamma(x), use_unicode=True) == 'Γ(x)'
    assert xpretty(gamma, use_unicode=True) == 'Γ'
    assert xpretty(symbols('gamma', cls=Function)(x), use_unicode=True) == 'γ(x)'
    assert xpretty(symbols('gamma', cls=Function), use_unicode=True) == 'γ'


def test_beta():
    assert xpretty(beta(x,y), use_unicode=True) == 'Β(x, y)'
    assert xpretty(beta(x,y), use_unicode=False) == 'B(x, y)'
    assert xpretty(beta, use_unicode=True) == 'Β'
    assert xpretty(beta, use_unicode=False) == 'B'
    mybeta = Function('beta')
    assert xpretty(mybeta(x), use_unicode=True) == 'β(x)'
    assert xpretty(mybeta(x, y, z), use_unicode=False) == 'beta(x, y, z)'
    assert xpretty(mybeta, use_unicode=True) == 'β'


# test that notation passes to subclasses of the same name only
def test_function_subclass_different_name():
    class mygamma(gamma):
        pass
    assert xpretty(mygamma, use_unicode=True) == r"mygamma"
    assert xpretty(mygamma(x), use_unicode=True) == r"mygamma(x)"


def test_SingularityFunction():
    assert xpretty(SingularityFunction(x, 0, n), use_unicode=True) == (
"""\
   n\n\
<x> \
""")
    assert xpretty(SingularityFunction(x, 1, n), use_unicode=True) == (
"""\
       n\n\
<x - 1> \
""")
    assert xpretty(SingularityFunction(x, -1, n), use_unicode=True) == (
"""\
       n\n\
<x + 1> \
""")
    assert xpretty(SingularityFunction(x, a, n), use_unicode=True) == (
"""\
        n\n\
<-a + x> \
""")
    assert xpretty(SingularityFunction(x, y, n), use_unicode=True) == (
"""\
       n\n\
<x - y> \
""")
    assert xpretty(SingularityFunction(x, 0, n), use_unicode=False) == (
"""\
   n\n\
<x> \
""")
    assert xpretty(SingularityFunction(x, 1, n), use_unicode=False) == (
"""\
       n\n\
<x - 1> \
""")
    assert xpretty(SingularityFunction(x, -1, n), use_unicode=False) == (
"""\
       n\n\
<x + 1> \
""")
    assert xpretty(SingularityFunction(x, a, n), use_unicode=False) == (
"""\
        n\n\
<-a + x> \
""")
    assert xpretty(SingularityFunction(x, y, n), use_unicode=False) == (
"""\
       n\n\
<x - y> \
""")


def test_deltas():
    assert xpretty(DiracDelta(x), use_unicode=True) == 'δ(x)'
    assert xpretty(DiracDelta(x, 1), use_unicode=True) == \
"""\
 (1)    \n\
δ    (x)\
"""
    assert xpretty(x*DiracDelta(x, 1), use_unicode=True) == \
"""\
   (1)    \n\
x⋅δ    (x)\
"""


def test_hyper():
    expr = hyper((), (), z)
    ucode_str = \
"""\
 ┌─  ⎛  │  ⎞\n\
 ├─  ⎜  │ z⎟\n\
0╵ 0 ⎝  │  ⎠\
"""
    ascii_str = \
"""\
  _         \n\
 |_  /  |  \\\n\
 |   |  | z|\n\
0  0 \\  |  /\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = hyper((), (1,), x)
    ucode_str = \
"""\
 ┌─  ⎛  │  ⎞\n\
 ├─  ⎜  │ x⎟\n\
0╵ 1 ⎝1 │  ⎠\
"""
    ascii_str = \
"""\
  _         \n\
 |_  /  |  \\\n\
 |   |  | x|\n\
0  1 \\1 |  /\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = hyper([2], [1], x)
    ucode_str = \
"""\
 ┌─  ⎛2 │  ⎞\n\
 ├─  ⎜  │ x⎟\n\
1╵ 1 ⎝1 │  ⎠\
"""
    ascii_str = \
"""\
  _         \n\
 |_  /2 |  \\\n\
 |   |  | x|\n\
1  1 \\1 |  /\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = hyper((pi/3, -2*k), (3, 4, 5, -3), x)
    ucode_str = \
"""\
     ⎛  π         │  ⎞\n\
 ┌─  ⎜  ─, -2⋅k   │  ⎟\n\
 ├─  ⎜  3         │ x⎟\n\
2╵ 4 ⎜            │  ⎟\n\
     ⎝-3, 3, 4, 5 │  ⎠\
"""
    ascii_str = \
"""\
                      \n\
  _  / pi         |  \\\n\
 |_  | --, -2*k   |  |\n\
 |   | 3          | x|\n\
2  4 |            |  |\n\
     \\-3, 3, 4, 5 |  /\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = hyper((pi, S('2/3'), -2*k), (3, 4, 5, -3), x**2)
    ucode_str = \
"""\
 ┌─  ⎛2/3, π, -2⋅k │  2⎞\n\
 ├─  ⎜             │ x ⎟\n\
3╵ 4 ⎝-3, 3, 4, 5  │   ⎠\
"""
    ascii_str = \
"""\
  _                      \n\
 |_  /2/3, pi, -2*k |  2\\
 |   |              | x |
3  4 \\ -3, 3, 4, 5  |   /"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = hyper([1, 2], [3, 4], 1/(1/(1/(1/x + 1) + 1) + 1))
    ucode_str = \
"""\
     ⎛     │       1      ⎞\n\
     ⎜     │ ─────────────⎟\n\
     ⎜     │         1    ⎟\n\
 ┌─  ⎜1, 2 │ 1 + ─────────⎟\n\
 ├─  ⎜     │           1  ⎟\n\
2╵ 2 ⎜3, 4 │     1 + ─────⎟\n\
     ⎜     │             1⎟\n\
     ⎜     │         1 + ─⎟\n\
     ⎝     │             x⎠\
"""

    ascii_str = \
"""\
                           \n\
     /     |       1      \\\n\
     |     | -------------|\n\
  _  |     |         1    |\n\
 |_  |1, 2 | 1 + ---------|\n\
 |   |     |           1  |\n\
2  2 |3, 4 |     1 + -----|\n\
     |     |             1|\n\
     |     |         1 + -|\n\
     \\     |             x/\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_meijerg():
    expr = meijerg([pi, pi, x], [1], [0, 1], [1, 2, 3], z)
    ucode_str = \
"""\
╭─╮2, 3 ⎛π, π, x     1    │  ⎞\n\
│╶┐     ⎜                 │ z⎟\n\
╰─╯4, 5 ⎝ 0, 1    1, 2, 3 │  ⎠\
"""
    ascii_str = \
"""\
 __2, 3 /pi, pi, x     1    |  \\\n\
/__     |                   | z|\n\
\\_|4, 5 \\  0, 1     1, 2, 3 |  /\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = meijerg([1, pi/7], [2, pi, 5], [], [], z**2)
    ucode_str = \
"""\
        ⎛   π          │   ⎞\n\
╭─╮0, 2 ⎜1, ─  2, 5, π │  2⎟\n\
│╶┐     ⎜   7          │ z ⎟\n\
╰─╯5, 0 ⎜              │   ⎟\n\
        ⎝              │   ⎠\
"""
    ascii_str = \
"""\
        /   pi           |   \\\n\
 __0, 2 |1, --  2, 5, pi |  2|\n\
/__     |   7            | z |\n\
\\_|5, 0 |                |   |\n\
        \\                |   /\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    ucode_str = \
"""\
╭─╮ 1, 10 ⎛1, 1, 1, 1, 1, 1, 1, 1, 1, 1  1 │  ⎞\n\
│╶┐       ⎜                                │ z⎟\n\
╰─╯11,  2 ⎝             1                1 │  ⎠\
"""
    ascii_str = \
"""\
 __ 1, 10 /1, 1, 1, 1, 1, 1, 1, 1, 1, 1  1 |  \\\n\
/__       |                                | z|\n\
\\_|11,  2 \\             1                1 |  /\
"""

    expr = meijerg([1]*10, [1], [1], [1], z)
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = meijerg([1, 2, ], [4, 3], [3], [4, 5], 1/(1/(1/(1/x + 1) + 1) + 1))

    ucode_str = \
"""\
        ⎛           │       1      ⎞\n\
        ⎜           │ ─────────────⎟\n\
        ⎜           │         1    ⎟\n\
╭─╮1, 2 ⎜1, 2  3, 4 │ 1 + ─────────⎟\n\
│╶┐     ⎜           │           1  ⎟\n\
╰─╯4, 3 ⎜ 3    4, 5 │     1 + ─────⎟\n\
        ⎜           │             1⎟\n\
        ⎜           │         1 + ─⎟\n\
        ⎝           │             x⎠\
"""

    ascii_str = \
"""\
        /           |       1      \\\n\
        |           | -------------|\n\
        |           |         1    |\n\
 __1, 2 |1, 2  3, 4 | 1 + ---------|\n\
/__     |           |           1  |\n\
\\_|4, 3 | 3    4, 5 |     1 + -----|\n\
        |           |             1|\n\
        |           |         1 + -|\n\
        \\           |             x/\
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = Integral(expr, x)

    ucode_str = \
"""\
⌠                                        \n\
⎮         ⎛           │       1      ⎞   \n\
⎮         ⎜           │ ─────────────⎟   \n\
⎮         ⎜           │         1    ⎟   \n\
⎮ ╭─╮1, 2 ⎜1, 2  3, 4 │ 1 + ─────────⎟   \n\
⎮ │╶┐     ⎜           │           1  ⎟ dx\n\
⎮ ╰─╯4, 3 ⎜ 3    4, 5 │     1 + ─────⎟   \n\
⎮         ⎜           │             1⎟   \n\
⎮         ⎜           │         1 + ─⎟   \n\
⎮         ⎝           │             x⎠   \n\
⌡                                        \
"""

    ascii_str = \
"""\
  /                                       \n\
 |                                        \n\
 |         /           |       1      \\   \n\
 |         |           | -------------|   \n\
 |         |           |         1    |   \n\
 |  __1, 2 |1, 2  3, 4 | 1 + ---------|   \n\
 | /__     |           |           1  | dx\n\
 | \\_|4, 3 | 3    4, 5 |     1 + -----|   \n\
 |         |           |             1|   \n\
 |         |           |         1 + -|   \n\
 |         \\           |             x/   \n\
 |                                        \n\
/                                         \
"""

    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_noncommutative():
    A, B, C = symbols('A,B,C', commutative=False)

    expr = A*B*C**-1
    ascii_str = \
"""\
     -1\n\
A*B*C  \
"""
    ucode_str = \
"""\
     -1\n\
A⋅B⋅C  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = C**-1*A*B
    ascii_str = \
"""\
 -1    \n\
C  *A*B\
"""
    ucode_str = \
"""\
 -1    \n\
C  ⋅A⋅B\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A*C**-1*B
    ascii_str = \
"""\
   -1  \n\
A*C  *B\
"""
    ucode_str = \
"""\
   -1  \n\
A⋅C  ⋅B\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A*C**-1*B/x
    ascii_str = \
"""\
   -1  \n\
A*C  *B\n\
-------\n\
   x   \
"""
    ucode_str = \
"""\
   -1  \n\
A⋅C  ⋅B\n\
───────\n\
   x   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_special_functions():
    x, y = symbols("x y")

    # atan2
    expr = atan2(y/sqrt(200), sqrt(x))
    ascii_str = \
"""\
     /  ___         \\\n\
     |\\/ 2 *y    ___|\n\
atan2|-------, \\/ x |\n\
     \\  20          /\
"""
    ucode_str = \
"""\
     ⎛√2⋅y    ⎞\n\
atan2⎜────, √x⎟\n\
     ⎝ 20     ⎠\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_geometry():
    e = Segment((0, 1), (0, 2))
    assert pretty(e) == 'Segment2D(Point2D(0, 1), Point2D(0, 2))'
    e = Ray((1, 1), angle=4.02*pi)
    assert pretty(e) == 'Ray2D(Point2D(1, 1), Point2D(2, tan(pi/50) + 1))'


def test_expint():
    expr = Ei(x)
    string = 'Ei(x)'
    assert pretty(expr) == string
    assert upretty(expr) == string

    expr = expint(1, z)
    ucode_str = "E₁(z)"
    ascii_str = "expint(1, z)"
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    assert pretty(Shi(x)) == 'Shi(x)'
    assert pretty(Si(x)) == 'Si(x)'
    assert pretty(Ci(x)) == 'Ci(x)'
    assert pretty(Chi(x)) == 'Chi(x)'
    assert upretty(Shi(x)) == 'Shi(x)'
    assert upretty(Si(x)) == 'Si(x)'
    assert upretty(Ci(x)) == 'Ci(x)'
    assert upretty(Chi(x)) == 'Chi(x)'


def test_elliptic_functions():
    ascii_str = \
"""\
 /  1  \\\n\
K|-----|\n\
 \\z + 1/\
"""
    ucode_str = \
"""\
 ⎛  1  ⎞\n\
K⎜─────⎟\n\
 ⎝z + 1⎠\
"""
    expr = elliptic_k(1/(z + 1))
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    ascii_str = \
"""\
 / |  1  \\\n\
F|1|-----|\n\
 \\ |z + 1/\
"""
    ucode_str = \
"""\
 ⎛ │  1  ⎞\n\
F⎜1│─────⎟\n\
 ⎝ │z + 1⎠\
"""
    expr = elliptic_f(1, 1/(1 + z))
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    ascii_str = \
"""\
 /  1  \\\n\
E|-----|\n\
 \\z + 1/\
"""
    ucode_str = \
"""\
 ⎛  1  ⎞\n\
E⎜─────⎟\n\
 ⎝z + 1⎠\
"""
    expr = elliptic_e(1/(z + 1))
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    ascii_str = \
"""\
 / |  1  \\\n\
E|1|-----|\n\
 \\ |z + 1/\
"""
    ucode_str = \
"""\
 ⎛ │  1  ⎞\n\
E⎜1│─────⎟\n\
 ⎝ │z + 1⎠\
"""
    expr = elliptic_e(1, 1/(1 + z))
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    ascii_str = \
"""\
  / |4\\\n\
Pi|3|-|\n\
  \\ |x/\
"""
    ucode_str = \
"""\
 ⎛ │4⎞\n\
Π⎜3│─⎟\n\
 ⎝ │x⎠\
"""
    expr = elliptic_pi(3, 4/x)
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    ascii_str = \
"""\
  /   4| \\\n\
Pi|3; -|6|\n\
  \\   x| /\
"""
    ucode_str = \
"""\
 ⎛   4│ ⎞\n\
Π⎜3; ─│6⎟\n\
 ⎝   x│ ⎠\
"""
    expr = elliptic_pi(3, 4/x, 6)
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_RandomDomain():
    from sympy.stats import Normal, Die, Exponential, pspace, where
    X = Normal('x1', 0, 1)
    assert upretty(where(X > 0)) == "Domain: 0 < x₁ ∧ x₁ < ∞"

    D = Die('d1', 6)
    assert upretty(where(D > 4)) == 'Domain: d₁ = 5 ∨ d₁ = 6'

    A = Exponential('a', 1)
    B = Exponential('b', 1)
    assert upretty(pspace(Tuple(A, B)).domain) == \
        'Domain: 0 ≤ a ∧ 0 ≤ b ∧ a < ∞ ∧ b < ∞'


def test_PrettyPoly():
    F = QQ.frac_field(x, y)
    R = QQ.poly_ring(x, y)

    expr = F.convert(x/(x + y))
    assert pretty(expr) == "x/(x + y)"
    assert upretty(expr) == "x/(x + y)"

    expr = R.convert(x + y)
    assert pretty(expr) == "x + y"
    assert upretty(expr) == "x + y"


def test_issue_6285():
    assert pretty(Pow(2, -5, evaluate=False)) == '1 \n--\n 5\n2 '
    assert pretty(Pow(x, (1/pi))) == \
    ' 1 \n'\
    ' --\n'\
    ' pi\n'\
    'x  '


def test_issue_6359():
    assert pretty(Integral(x**2, x)**2) == \
"""\
          2
/  /     \\ \n\
| |      | \n\
| |  2   | \n\
| | x  dx| \n\
| |      | \n\
\\/       / \
"""
    assert upretty(Integral(x**2, x)**2) == \
"""\
         2
⎛⌠      ⎞ \n\
⎜⎮  2   ⎟ \n\
⎜⎮ x  dx⎟ \n\
⎝⌡      ⎠ \
"""

    assert pretty(Sum(x**2, (x, 0, 1))**2) == \
"""\
          2\n\
/ 1      \\ \n\
|___     | \n\
|\\  `    | \n\
| \\     2| \n\
| /    x | \n\
|/__,    | \n\
\\x = 0   / \
"""
    assert upretty(Sum(x**2, (x, 0, 1))**2) == \
"""\
          2
⎛  1     ⎞ \n\
⎜ ___    ⎟ \n\
⎜ ╲      ⎟ \n\
⎜  ╲    2⎟ \n\
⎜  ╱   x ⎟ \n\
⎜ ╱      ⎟ \n\
⎜ ‾‾‾    ⎟ \n\
⎝x = 0   ⎠ \
"""

    assert pretty(Product(x**2, (x, 1, 2))**2) == \
"""\
           2
/  2      \\ \n\
|______   | \n\
| |  |   2| \n\
| |  |  x | \n\
| |  |    | \n\
\\x = 1    / \
"""
    assert upretty(Product(x**2, (x, 1, 2))**2) == \
"""\
           2
⎛  2      ⎞ \n\
⎜─┬──┬─   ⎟ \n\
⎜ │  │   2⎟ \n\
⎜ │  │  x ⎟ \n\
⎜ │  │    ⎟ \n\
⎝x = 1    ⎠ \
"""

    f = Function('f')
    assert pretty(Derivative(f(x), x)**2) == \
"""\
          2
/d       \\ \n\
|--(f(x))| \n\
\\dx      / \
"""
    assert upretty(Derivative(f(x), x)**2) == \
"""\
          2
⎛d       ⎞ \n\
⎜──(f(x))⎟ \n\
⎝dx      ⎠ \
"""


def test_issue_6739():
    ascii_str = \
"""\
  1  \n\
-----\n\
  ___\n\
\\/ x \
"""
    ucode_str = \
"""\
1 \n\
──\n\
√x\
"""
    assert pretty(1/sqrt(x)) == ascii_str
    assert upretty(1/sqrt(x)) == ucode_str


def test_complicated_symbol_unchanged():
    for symb_name in ["dexpr2_d1tau", "dexpr2^d1tau"]:
        assert pretty(Symbol(symb_name)) == symb_name


def test_categories():
    from sympy.categories import (Object, IdentityMorphism,
        NamedMorphism, Category, Diagram, DiagramGrid)

    A1 = Object("A1")
    A2 = Object("A2")
    A3 = Object("A3")

    f1 = NamedMorphism(A1, A2, "f1")
    f2 = NamedMorphism(A2, A3, "f2")
    id_A1 = IdentityMorphism(A1)

    K1 = Category("K1")

    assert pretty(A1) == "A1"
    assert upretty(A1) == "A₁"

    assert pretty(f1) == "f1:A1-->A2"
    assert upretty(f1) == "f₁:A₁——▶A₂"
    assert pretty(id_A1) == "id:A1-->A1"
    assert upretty(id_A1) == "id:A₁——▶A₁"

    assert pretty(f2*f1) == "f2*f1:A1-->A3"
    assert upretty(f2*f1) == "f₂∘f₁:A₁——▶A₃"

    assert pretty(K1) == "K1"
    assert upretty(K1) == "K₁"

    # Test how diagrams are printed.
    d = Diagram()
    assert pretty(d) == "EmptySet"
    assert upretty(d) == "∅"

    d = Diagram({f1: "unique", f2: S.EmptySet})
    assert pretty(d) == "{f2*f1:A1-->A3: EmptySet, id:A1-->A1: " \
        "EmptySet, id:A2-->A2: EmptySet, id:A3-->A3: " \
        "EmptySet, f1:A1-->A2: {unique}, f2:A2-->A3: EmptySet}"

    assert upretty(d) == "{f₂∘f₁:A₁——▶A₃: ∅, id:A₁——▶A₁: ∅, " \
        "id:A₂——▶A₂: ∅, id:A₃——▶A₃: ∅, f₁:A₁——▶A₂: {unique}, f₂:A₂——▶A₃: ∅}"

    d = Diagram({f1: "unique", f2: S.EmptySet}, {f2 * f1: "unique"})
    assert pretty(d) == "{f2*f1:A1-->A3: EmptySet, id:A1-->A1: " \
        "EmptySet, id:A2-->A2: EmptySet, id:A3-->A3: " \
        "EmptySet, f1:A1-->A2: {unique}, f2:A2-->A3: EmptySet}" \
        " ==> {f2*f1:A1-->A3: {unique}}"
    assert upretty(d) == "{f₂∘f₁:A₁——▶A₃: ∅, id:A₁——▶A₁: ∅, id:A₂——▶A₂: " \
        "∅, id:A₃——▶A₃: ∅, f₁:A₁——▶A₂: {unique}, f₂:A₂——▶A₃: ∅}" \
        " ══▶ {f₂∘f₁:A₁——▶A₃: {unique}}"

    grid = DiagramGrid(d)
    assert pretty(grid) == "A1  A2\n      \nA3    "
    assert upretty(grid) == "A₁  A₂\n      \nA₃    "


def test_PrettyModules():
    R = QQ.old_poly_ring(x, y)
    F = R.free_module(2)
    M = F.submodule([x, y], [1, x**2])

    ucode_str = \
"""\
       2\n\
ℚ[x, y] \
"""
    ascii_str = \
"""\
        2\n\
QQ[x, y] \
"""

    assert upretty(F) == ucode_str
    assert pretty(F) == ascii_str

    ucode_str = \
"""\
╱        ⎡    2⎤╲\n\
╲[x, y], ⎣1, x ⎦╱\
"""
    ascii_str = \
"""\
              2  \n\
<[x, y], [1, x ]>\
"""

    assert upretty(M) == ucode_str
    assert pretty(M) == ascii_str

    I = R.ideal(x**2, y)

    ucode_str = \
"""\
╱ 2   ╲\n\
╲x , y╱\
"""

    ascii_str = \
"""\
  2    \n\
<x , y>\
"""

    assert upretty(I) == ucode_str
    assert pretty(I) == ascii_str

    Q = F / M

    ucode_str = \
"""\
           2     \n\
    ℚ[x, y]      \n\
─────────────────\n\
╱        ⎡    2⎤╲\n\
╲[x, y], ⎣1, x ⎦╱\
"""

    ascii_str = \
"""\
            2    \n\
    QQ[x, y]     \n\
-----------------\n\
              2  \n\
<[x, y], [1, x ]>\
"""

    assert upretty(Q) == ucode_str
    assert pretty(Q) == ascii_str

    ucode_str = \
"""\
╱⎡    3⎤                                                ╲\n\
│⎢   x ⎥   ╱        ⎡    2⎤╲           ╱        ⎡    2⎤╲│\n\
│⎢1, ──⎥ + ╲[x, y], ⎣1, x ⎦╱, [2, y] + ╲[x, y], ⎣1, x ⎦╱│\n\
╲⎣   2 ⎦                                                ╱\
"""

    ascii_str = \
"""\
      3                                                  \n\
     x                   2                           2   \n\
<[1, --] + <[x, y], [1, x ]>, [2, y] + <[x, y], [1, x ]>>\n\
     2                                                   \
"""


def test_QuotientRing():
    R = QQ.old_poly_ring(x)/[x**2 + 1]

    ucode_str = \
"""\
  ℚ[x]  \n\
────────\n\
╱ 2    ╲\n\
╲x  + 1╱\
"""

    ascii_str = \
"""\
 QQ[x]  \n\
--------\n\
  2     \n\
<x  + 1>\
"""

    assert upretty(R) == ucode_str
    assert pretty(R) == ascii_str

    ucode_str = \
"""\
    ╱ 2    ╲\n\
1 + ╲x  + 1╱\
"""

    ascii_str = \
"""\
      2     \n\
1 + <x  + 1>\
"""

    assert upretty(R.one) == ucode_str
    assert pretty(R.one) == ascii_str


def test_Homomorphism():
    from sympy.polys.agca import homomorphism

    R = QQ.old_poly_ring(x)

    expr = homomorphism(R.free_module(1), R.free_module(1), [0])

    ucode_str = \
"""\
          1         1\n\
[0] : ℚ[x]  ──> ℚ[x] \
"""

    ascii_str = \
"""\
           1          1\n\
[0] : QQ[x]  --> QQ[x] \
"""

    assert upretty(expr) == ucode_str
    assert pretty(expr) == ascii_str

    expr = homomorphism(R.free_module(2), R.free_module(2), [0, 0])

    ucode_str = \
"""\
⎡0  0⎤       2         2\n\
⎢    ⎥ : ℚ[x]  ──> ℚ[x] \n\
⎣0  0⎦                  \
"""

    ascii_str = \
"""\
[0  0]        2          2\n\
[    ] : QQ[x]  --> QQ[x] \n\
[0  0]                    \
"""

    assert upretty(expr) == ucode_str
    assert pretty(expr) == ascii_str

    expr = homomorphism(R.free_module(1), R.free_module(1) / [[x]], [0])

    ucode_str = \
"""\
                    1\n\
          1     ℚ[x] \n\
[0] : ℚ[x]  ──> ─────\n\
                <[x]>\
"""

    ascii_str = \
"""\
                      1\n\
           1     QQ[x] \n\
[0] : QQ[x]  --> ------\n\
                 <[x]> \
"""

    assert upretty(expr) == ucode_str
    assert pretty(expr) == ascii_str


def test_Tr():
    A, B = symbols('A B', commutative=False)
    t = Tr(A*B)
    assert pretty(t) == r'Tr(A*B)'
    assert upretty(t) == 'Tr(A⋅B)'


def test_pretty_Add():
    eq = Mul(-2, x - 2, evaluate=False) + 5
    assert pretty(eq) == '5 - 2*(x - 2)'


def test_issue_7179():
    assert upretty(Not(Equivalent(x, y))) == 'x ⇎ y'
    assert upretty(Not(Implies(x, y))) == 'x ↛ y'


def test_issue_7180():
    assert upretty(Equivalent(x, y)) == 'x ⇔ y'


def test_pretty_Complement():
    assert pretty(S.Reals - S.Naturals) == '(-oo, oo) \\ Naturals'
    assert upretty(S.Reals - S.Naturals) == 'ℝ \\ ℕ'
    assert pretty(S.Reals - S.Naturals0) == '(-oo, oo) \\ Naturals0'
    assert upretty(S.Reals - S.Naturals0) == 'ℝ \\ ℕ₀'


def test_pretty_SymmetricDifference():
    from sympy.sets.sets import SymmetricDifference
    assert upretty(SymmetricDifference(Interval(2,3), Interval(3,5), \
           evaluate = False)) == '[2, 3] ∆ [3, 5]'
    with raises(NotImplementedError):
        pretty(SymmetricDifference(Interval(2,3), Interval(3,5), evaluate = False))


def test_pretty_Contains():
    assert pretty(Contains(x, S.Integers)) == 'Contains(x, Integers)'
    assert upretty(Contains(x, S.Integers)) == 'x ∈ ℤ'


def test_issue_8292():
    from sympy.core import sympify
    e = sympify('((x+x**4)/(x-1))-(2*(x-1)**4/(x-1)**4)', evaluate=False)
    ucode_str = \
"""\
           4    4    \n\
  2⋅(x - 1)    x  + x\n\
- ────────── + ──────\n\
          4    x - 1 \n\
   (x - 1)           \
"""
    ascii_str = \
"""\
           4    4    \n\
  2*(x - 1)    x  + x\n\
- ---------- + ------\n\
          4    x - 1 \n\
   (x - 1)           \
"""
    assert pretty(e) == ascii_str
    assert upretty(e) == ucode_str


def test_issue_4335():
    y = Function('y')
    expr = -y(x).diff(x)
    ucode_str = \
"""\
 d       \n\
-──(y(x))\n\
 dx      \
"""
    ascii_str = \
"""\
  d       \n\
- --(y(x))\n\
  dx      \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_issue_8344():
    from sympy.core import sympify
    e = sympify('2*x*y**2/1**2 + 1', evaluate=False)
    ucode_str = \
"""\
     2    \n\
2⋅x⋅y     \n\
────── + 1\n\
   2      \n\
  1       \
"""
    assert upretty(e) == ucode_str


def test_issue_6324():
    x = Pow(2, 3, evaluate=False)
    y = Pow(10, -2, evaluate=False)
    e = Mul(x, y, evaluate=False)
    ucode_str = \
"""\
 3 \n\
2  \n\
───\n\
  2\n\
10 \
"""
    assert upretty(e) == ucode_str


def test_issue_7927():
    e = sin(x/2)**cos(x/2)
    ucode_str = \
"""\
           ⎛x⎞\n\
        cos⎜─⎟\n\
           ⎝2⎠\n\
⎛   ⎛x⎞⎞      \n\
⎜sin⎜─⎟⎟      \n\
⎝   ⎝2⎠⎠      \
"""
    assert upretty(e) == ucode_str
    e = sin(x)**(S(11)/13)
    ucode_str = \
"""\
        11\n\
        ──\n\
        13\n\
(sin(x))  \
"""
    assert upretty(e) == ucode_str


def test_issue_6134():
    from sympy.abc import lamda, t
    phi = Function('phi')

    e = lamda*x*Integral(phi(t)*pi*sin(pi*t), (t, 0, 1)) + lamda*x**2*Integral(phi(t)*2*pi*sin(2*pi*t), (t, 0, 1))
    ucode_str = \
"""\
     1                              1                   \n\
   2 ⌠                              ⌠                   \n\
λ⋅x ⋅⎮ 2⋅π⋅φ(t)⋅sin(2⋅π⋅t) dt + λ⋅x⋅⎮ π⋅φ(t)⋅sin(π⋅t) dt\n\
     ⌡                              ⌡                   \n\
     0                              0                   \
"""
    assert upretty(e) == ucode_str


def test_issue_9877():
    ucode_str1 = '(2, 3) ∪ ([1, 2] \\ {x})'
    a, b, c = Interval(2, 3, True, True), Interval(1, 2), FiniteSet(x)
    assert upretty(Union(a, Complement(b, c))) == ucode_str1

    ucode_str2 = '{x} ∩ {y} ∩ ({z} \\ [1, 2])'
    d, e, f, g = FiniteSet(x), FiniteSet(y), FiniteSet(z), Interval(1, 2)
    assert upretty(Intersection(d, e, Complement(f, g))) == ucode_str2


def test_issue_13651():
    expr1 = c + Mul(-1, a + b, evaluate=False)
    assert pretty(expr1) == 'c - (a + b)'
    expr2 = c + Mul(-1, a - b + d, evaluate=False)
    assert pretty(expr2) == 'c - (a - b + d)'


def test_pretty_primenu():
    from sympy.functions.combinatorial.numbers import primenu

    ascii_str1 = "nu(n)"
    ucode_str1 = "ν(n)"

    n = symbols('n', integer=True)
    assert pretty(primenu(n)) == ascii_str1
    assert upretty(primenu(n)) == ucode_str1


def test_pretty_primeomega():
    from sympy.functions.combinatorial.numbers import primeomega

    ascii_str1 = "Omega(n)"
    ucode_str1 = "Ω(n)"

    n = symbols('n', integer=True)
    assert pretty(primeomega(n)) == ascii_str1
    assert upretty(primeomega(n)) == ucode_str1


def test_pretty_Mod():
    from sympy.core import Mod

    ascii_str1 = "x mod 7"
    ucode_str1 = "x mod 7"

    ascii_str2 = "(x + 1) mod 7"
    ucode_str2 = "(x + 1) mod 7"

    ascii_str3 = "2*x mod 7"
    ucode_str3 = "2⋅x mod 7"

    ascii_str4 = "(x mod 7) + 1"
    ucode_str4 = "(x mod 7) + 1"

    ascii_str5 = "2*(x mod 7)"
    ucode_str5 = "2⋅(x mod 7)"

    x = symbols('x', integer=True)
    assert pretty(Mod(x, 7)) == ascii_str1
    assert upretty(Mod(x, 7)) == ucode_str1
    assert pretty(Mod(x + 1, 7)) == ascii_str2
    assert upretty(Mod(x + 1, 7)) == ucode_str2
    assert pretty(Mod(2 * x, 7)) == ascii_str3
    assert upretty(Mod(2 * x, 7)) == ucode_str3
    assert pretty(Mod(x, 7) + 1) == ascii_str4
    assert upretty(Mod(x, 7) + 1) == ucode_str4
    assert pretty(2 * Mod(x, 7)) == ascii_str5
    assert upretty(2 * Mod(x, 7)) == ucode_str5


def test_issue_11801():
    assert pretty(Symbol("")) == ""
    assert upretty(Symbol("")) == ""


def test_pretty_UnevaluatedExpr():
    x = symbols('x')
    he = UnevaluatedExpr(1/x)

    ucode_str = \
"""\
1\n\
─\n\
x\
"""

    assert upretty(he) == ucode_str

    ucode_str = \
"""\
   2\n\
⎛1⎞ \n\
⎜─⎟ \n\
⎝x⎠ \
"""

    assert upretty(he**2) == ucode_str

    ucode_str = \
"""\
    1\n\
1 + ─\n\
    x\
"""

    assert upretty(he + 1) == ucode_str

    ucode_str = \
('''\
  1\n\
x⋅─\n\
  x\
''')
    assert upretty(x*he) == ucode_str


def test_issue_10472():
    M = (Matrix([[0, 0], [0, 0]]), Matrix([0, 0]))

    ucode_str = \
"""\
⎛⎡0  0⎤  ⎡0⎤⎞
⎜⎢    ⎥, ⎢ ⎥⎟
⎝⎣0  0⎦  ⎣0⎦⎠\
"""
    assert upretty(M) == ucode_str


def test_MatrixElement_printing():
    # test cases for issue #11821
    A = MatrixSymbol("A", 1, 3)
    B = MatrixSymbol("B", 1, 3)
    C = MatrixSymbol("C", 1, 3)

    ascii_str1 = "A_00"
    ucode_str1 = "A₀₀"
    assert pretty(A[0, 0])  == ascii_str1
    assert upretty(A[0, 0]) == ucode_str1

    ascii_str1 = "3*A_00"
    ucode_str1 = "3⋅A₀₀"
    assert pretty(3*A[0, 0])  == ascii_str1
    assert upretty(3*A[0, 0]) == ucode_str1

    ascii_str1 = "(-B + A)[0, 0]"
    ucode_str1 = "(-B + A)[0, 0]"
    F = C[0, 0].subs(C, A - B)
    assert pretty(F)  == ascii_str1
    assert upretty(F) == ucode_str1


def test_issue_12675():
    x, y, t, j = symbols('x y t j')
    e = CoordSys3D('e')

    ucode_str = \
"""\
⎛   t⎞    \n\
⎜⎛x⎞ ⎟ j_e\n\
⎜⎜─⎟ ⎟    \n\
⎝⎝y⎠ ⎠    \
"""
    assert upretty((x/y)**t*e.j) == ucode_str
    ucode_str = \
"""\
⎛1⎞    \n\
⎜─⎟ j_e\n\
⎝y⎠    \
"""
    assert upretty((1/y)*e.j) == ucode_str


def test_MatrixSymbol_printing():
    # test cases for issue #14237
    A = MatrixSymbol("A", 3, 3)
    B = MatrixSymbol("B", 3, 3)
    C = MatrixSymbol("C", 3, 3)
    assert pretty(-A*B*C) == "-A*B*C"
    assert pretty(A - B) == "-B + A"
    assert pretty(A*B*C - A*B - B*C) == "-A*B -B*C + A*B*C"

    # issue #14814
    x = MatrixSymbol('x', n, n)
    y = MatrixSymbol('y*', n, n)
    assert pretty(x + y) == "x + y*"
    ascii_str = \
"""\
     2     \n\
-2*y*  -a*x\
"""
    assert pretty(-a*x + -2*y*y) == ascii_str


def test_degree_printing():
    expr1 = 90*degree
    assert pretty(expr1) == '90°'
    expr2 = x*degree
    assert pretty(expr2) == 'x°'
    expr3 = cos(x*degree + 90*degree)
    assert pretty(expr3) == 'cos(x° + 90°)'


def test_vector_expr_pretty_printing():
    A = CoordSys3D('A')

    assert upretty(Cross(A.i, A.x*A.i+3*A.y*A.j)) == "(i_A)×((x_A) i_A + (3⋅y_A) j_A)"
    assert upretty(x*Cross(A.i, A.j)) == 'x⋅(i_A)×(j_A)'

    assert upretty(Curl(A.x*A.i + 3*A.y*A.j)) == "∇×((x_A) i_A + (3⋅y_A) j_A)"

    assert upretty(Divergence(A.x*A.i + 3*A.y*A.j)) == "∇⋅((x_A) i_A + (3⋅y_A) j_A)"

    assert upretty(Dot(A.i, A.x*A.i+3*A.y*A.j)) == "(i_A)⋅((x_A) i_A + (3⋅y_A) j_A)"

    assert upretty(Gradient(A.x+3*A.y)) == "∇(x_A + 3⋅y_A)"
    assert upretty(Laplacian(A.x+3*A.y)) == "∆(x_A + 3⋅y_A)"
    # TODO: add support for ASCII pretty.


def test_pretty_print_tensor_expr():
    L = TensorIndexType("L")
    i, j, k = tensor_indices("i j k", L)
    i0 = tensor_indices("i_0", L)
    A, B, C, D = tensor_heads("A B C D", [L])
    H = TensorHead("H", [L, L])

    expr = -i
    ascii_str = \
"""\
-i\
"""
    ucode_str = \
"""\
-i\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A(i)
    ascii_str = \
"""\
 i\n\
A \n\
  \
"""
    ucode_str = \
"""\
 i\n\
A \n\
  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A(i0)
    ascii_str = \
"""\
 i_0\n\
A   \n\
    \
"""
    ucode_str = \
"""\
 i₀\n\
A  \n\
   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A(-i)
    ascii_str = \
"""\
  \n\
A \n\
 i\
"""
    ucode_str = \
"""\
  \n\
A \n\
 i\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = -3*A(-i)
    ascii_str = \
"""\
     \n\
-3*A \n\
    i\
"""
    ucode_str = \
"""\
     \n\
-3⋅A \n\
    i\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = H(i, -j)
    ascii_str = \
"""\
 i \n\
H  \n\
  j\
"""
    ucode_str = \
"""\
 i \n\
H  \n\
  j\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = H(i, -i)
    ascii_str = \
"""\
 L_0   \n\
H      \n\
    L_0\
"""
    ucode_str = \
"""\
 L₀  \n\
H    \n\
   L₀\
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = H(i, -j)*A(j)*B(k)
    ascii_str = \
"""\
 i     L_0  k\n\
H    *A   *B \n\
  L_0        \
"""
    ucode_str = \
"""\
 i    L₀  k\n\
H   ⋅A  ⋅B \n\
  L₀       \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (1+x)*A(i)
    ascii_str = \
"""\
         i\n\
(x + 1)*A \n\
          \
"""
    ucode_str = \
"""\
         i\n\
(x + 1)⋅A \n\
          \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A(i) + 3*B(i)
    ascii_str = \
"""\
   i    i\n\
3*B  + A \n\
         \
"""
    ucode_str = \
"""\
   i    i\n\
3⋅B  + A \n\
         \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_pretty_print_tensor_partial_deriv():
    from sympy.tensor.toperators import PartialDerivative

    L = TensorIndexType("L")
    i, j, k = tensor_indices("i j k", L)

    A, B, C, D = tensor_heads("A B C D", [L])

    H = TensorHead("H", [L, L])

    expr = PartialDerivative(A(i), A(j))
    ascii_str = \
"""\
 d / i\\\n\
---|A |\n\
  j\\  /\n\
dA     \n\
       \
"""
    ucode_str = \
"""\
 ∂ ⎛ i⎞\n\
───⎜A ⎟\n\
  j⎝  ⎠\n\
∂A     \n\
       \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A(i)*PartialDerivative(H(k, -i), A(j))
    ascii_str = \
"""\
 L_0  d / k   \\\n\
A   *---|H    |\n\
       j\\  L_0/\n\
     dA        \n\
               \
"""
    ucode_str = \
"""\
 L₀  ∂ ⎛ k  ⎞\n\
A  ⋅───⎜H   ⎟\n\
      j⎝  L₀⎠\n\
    ∂A       \n\
             \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = A(i)*PartialDerivative(B(k)*C(-i) + 3*H(k, -i), A(j))
    ascii_str = \
"""\
 L_0  d /   k       k     \\\n\
A   *---|3*H     + B *C   |\n\
       j\\    L_0       L_0/\n\
     dA                    \n\
                           \
"""
    ucode_str = \
"""\
 L₀  ∂ ⎛   k      k    ⎞\n\
A  ⋅───⎜3⋅H    + B ⋅C  ⎟\n\
      j⎝    L₀       L₀⎠\n\
    ∂A                  \n\
                        \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (A(i) + B(i))*PartialDerivative(C(j), D(j))
    ascii_str = \
"""\
/ i    i\\   d  / L_0\\\n\
|A  + B |*-----|C   |\n\
\\       /   L_0\\    /\n\
          dD         \n\
                     \
"""
    ucode_str = \
"""\
⎛ i    i⎞  ∂  ⎛ L₀⎞\n\
⎜A  + B ⎟⋅────⎜C  ⎟\n\
⎝       ⎠   L₀⎝   ⎠\n\
          ∂D       \n\
                   \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = (A(i) + B(i))*PartialDerivative(C(-i), D(j))
    ascii_str = \
"""\
/ L_0    L_0\\  d /    \\\n\
|A    + B   |*---|C   |\n\
\\           /   j\\ L_0/\n\
              dD       \n\
                       \
"""
    ucode_str = \
"""\
⎛ L₀    L₀⎞  ∂ ⎛   ⎞\n\
⎜A   + B  ⎟⋅───⎜C  ⎟\n\
⎝         ⎠   j⎝ L₀⎠\n\
            ∂D      \n\
                    \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = PartialDerivative(B(-i) + A(-i), A(-j), A(-n))
    ucode_str = """\
   2            \n\
  ∂    ⎛       ⎞\n\
───────⎜A  + B ⎟\n\
       ⎝ i    i⎠\n\
∂A  ∂A          \n\
  n   j         \
"""
    assert upretty(expr) == ucode_str

    expr = PartialDerivative(3*A(-i), A(-j), A(-n))
    ucode_str = """\
   2         \n\
  ∂    ⎛    ⎞\n\
───────⎜3⋅A ⎟\n\
       ⎝   i⎠\n\
∂A  ∂A       \n\
  n   j      \
"""
    assert upretty(expr) == ucode_str

    expr = TensorElement(H(i, j), {i:1})
    ascii_str = \
"""\
 i=1,j\n\
H     \n\
      \
"""
    ucode_str = ascii_str
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = TensorElement(H(i, j), {i: 1, j: 1})
    ascii_str = \
"""\
 i=1,j=1\n\
H       \n\
        \
"""
    ucode_str = ascii_str
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = TensorElement(H(i, j), {j: 1})
    ascii_str = \
"""\
 i,j=1\n\
H     \n\
      \
"""
    ucode_str = ascii_str

    expr = TensorElement(H(-i, j), {-i: 1})
    ascii_str = \
"""\
    j\n\
H    \n\
 i=1 \
"""
    ucode_str = ascii_str
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_issue_15560():
    a = MatrixSymbol('a', 1, 1)
    e = pretty(a*(KroneckerProduct(a, a)))
    result = 'a*(a x a)'
    assert e == result


def test_print_polylog():
    # Part of issue 6013
    uresult = 'Li₂(3)'
    aresult = 'polylog(2, 3)'
    assert pretty(polylog(2, 3)) == aresult
    assert upretty(polylog(2, 3)) == uresult


# Issue #25312
def test_print_expint_polylog_symbolic_order():
    s, z = symbols("s, z")
    uresult = 'Liₛ(z)'
    aresult = 'polylog(s, z)'
    assert pretty(polylog(s, z)) == aresult
    assert upretty(polylog(s, z)) == uresult
    # TODO: TBD polylog(s - 1, z)
    uresult = 'Eₛ(z)'
    aresult = 'expint(s, z)'
    assert pretty(expint(s, z)) == aresult
    assert upretty(expint(s, z)) == uresult



def test_print_polylog_long_order_issue_25309():
    s, z = symbols("s, z")
    ucode_str = \
"""\
       ⎛ 2   ⎞\n\
polylog⎝s , z⎠\
"""
    assert upretty(polylog(s**2, z)) == ucode_str


def test_print_lerchphi():
    # Part of issue 6013
    a = Symbol('a')
    pretty(lerchphi(a, 1, 2))
    uresult = 'Φ(a, 1, 2)'
    aresult = 'lerchphi(a, 1, 2)'
    assert pretty(lerchphi(a, 1, 2)) == aresult
    assert upretty(lerchphi(a, 1, 2)) == uresult


def test_issue_15583():

    N = mechanics.ReferenceFrame('N')
    result = '(n_x, n_y, n_z)'
    e = pretty((N.x, N.y, N.z))
    assert e == result


def test_matrixSymbolBold():
    # Issue 15871
    def boldpretty(expr):
        return xpretty(expr, use_unicode=True, wrap_line=False, mat_symbol_style="bold")

    from sympy.matrices.expressions.trace import trace
    A = MatrixSymbol("A", 2, 2)
    assert boldpretty(trace(A)) == 'tr(𝐀)'

    A = MatrixSymbol("A", 3, 3)
    B = MatrixSymbol("B", 3, 3)
    C = MatrixSymbol("C", 3, 3)

    assert boldpretty(-A) == '-𝐀'
    assert boldpretty(A - A*B - B) == '-𝐁 -𝐀⋅𝐁 + 𝐀'
    assert boldpretty(-A*B - A*B*C - B) == '-𝐁 -𝐀⋅𝐁 -𝐀⋅𝐁⋅𝐂'

    A = MatrixSymbol("Addot", 3, 3)
    assert boldpretty(A) == '𝐀̈'
    omega = MatrixSymbol("omega", 3, 3)
    assert boldpretty(omega) == 'ω'
    omega = MatrixSymbol("omeganorm", 3, 3)
    assert boldpretty(omega) == '‖ω‖'

    a = Symbol('alpha')
    b = Symbol('b')
    c = MatrixSymbol("c", 3, 1)
    d = MatrixSymbol("d", 3, 1)

    assert boldpretty(a*B*c+b*d) == 'b⋅𝐝 + α⋅𝐁⋅𝐜'

    d = MatrixSymbol("delta", 3, 1)
    B = MatrixSymbol("Beta", 3, 3)

    assert boldpretty(a*B*c+b*d) == 'b⋅δ + α⋅Β⋅𝐜'

    A = MatrixSymbol("A_2", 3, 3)
    assert boldpretty(A) == '𝐀₂'


def test_center_accent():
    assert center_accent('a', '\N{COMBINING TILDE}') == 'ã'
    assert center_accent('aa', '\N{COMBINING TILDE}') == 'aã'
    assert center_accent('aaa', '\N{COMBINING TILDE}') == 'aãa'
    assert center_accent('aaaa', '\N{COMBINING TILDE}') == 'aaãa'
    assert center_accent('aaaaa', '\N{COMBINING TILDE}') == 'aaãaa'
    assert center_accent('abcdefg', '\N{COMBINING FOUR DOTS ABOVE}') == 'abcd⃜efg'


def test_imaginary_unit():
    from sympy.printing.pretty import pretty  # b/c it was redefined above
    assert pretty(1 + I, use_unicode=False) == '1 + I'
    assert pretty(1 + I, use_unicode=True) == '1 + ⅈ'
    assert pretty(1 + I, use_unicode=False, imaginary_unit='j') == '1 + I'
    assert pretty(1 + I, use_unicode=True, imaginary_unit='j') == '1 + ⅉ'

    raises(TypeError, lambda: pretty(I, imaginary_unit=I))
    raises(ValueError, lambda: pretty(I, imaginary_unit="kkk"))


def test_str_special_matrices():
    from sympy.matrices import Identity, ZeroMatrix, OneMatrix
    assert pretty(Identity(4)) == 'I'
    assert upretty(Identity(4)) == '𝕀'
    assert pretty(ZeroMatrix(2, 2)) == '0'
    assert upretty(ZeroMatrix(2, 2)) == '𝟘'
    assert pretty(OneMatrix(2, 2)) == '1'
    assert upretty(OneMatrix(2, 2)) == '𝟙'


def test_pretty_misc_functions():
    assert pretty(LambertW(x)) == 'W(x)'
    assert upretty(LambertW(x)) == 'W(x)'
    assert pretty(LambertW(x, y)) == 'W(x, y)'
    assert upretty(LambertW(x, y)) == 'W(x, y)'
    assert pretty(airyai(x)) == 'Ai(x)'
    assert upretty(airyai(x)) == 'Ai(x)'
    assert pretty(airybi(x)) == 'Bi(x)'
    assert upretty(airybi(x)) == 'Bi(x)'
    assert pretty(airyaiprime(x)) == "Ai'(x)"
    assert upretty(airyaiprime(x)) == "Ai'(x)"
    assert pretty(airybiprime(x)) == "Bi'(x)"
    assert upretty(airybiprime(x)) == "Bi'(x)"
    assert pretty(fresnelc(x)) == 'C(x)'
    assert upretty(fresnelc(x)) == 'C(x)'
    assert pretty(fresnels(x)) == 'S(x)'
    assert upretty(fresnels(x)) == 'S(x)'
    assert pretty(Heaviside(x)) == 'Heaviside(x)'
    assert upretty(Heaviside(x)) == 'θ(x)'
    assert pretty(Heaviside(x, y)) == 'Heaviside(x, y)'
    assert upretty(Heaviside(x, y)) == 'θ(x, y)'
    assert pretty(dirichlet_eta(x)) == 'dirichlet_eta(x)'
    assert upretty(dirichlet_eta(x)) == 'η(x)'


def test_hadamard_power():
    m, n, p = symbols('m, n, p', integer=True)
    A = MatrixSymbol('A', m, n)
    B = MatrixSymbol('B', m, n)

    # Testing printer:
    expr = hadamard_power(A, n)
    ascii_str = \
"""\
 .n\n\
A  \
"""
    ucode_str = \
"""\
 ∘n\n\
A  \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = hadamard_power(A, 1+n)
    ascii_str = \
"""\
 .(n + 1)\n\
A        \
"""
    ucode_str = \
"""\
 ∘(n + 1)\n\
A        \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str

    expr = hadamard_power(A*B.T, 1+n)
    ascii_str = \
"""\
      .(n + 1)\n\
/   T\\        \n\
\\A*B /        \
"""
    ucode_str = \
"""\
      ∘(n + 1)\n\
⎛   T⎞        \n\
⎝A⋅B ⎠        \
"""
    assert pretty(expr) == ascii_str
    assert upretty(expr) == ucode_str


def test_issue_17258():
    n = Symbol('n', integer=True)
    assert pretty(Sum(n, (n, -oo, 1))) == \
    '   1     \n'\
    '  __     \n'\
    '  \\ `    \n'\
    '   )    n\n'\
    '  /_,    \n'\
    'n = -oo  '

    assert upretty(Sum(n, (n, -oo, 1))) == \
"""\
  1     \n\
 ___    \n\
 ╲      \n\
  ╲     \n\
  ╱    n\n\
 ╱      \n\
 ‾‾‾    \n\
n = -∞  \
"""


def test_is_combining():
    line = "v̇_m"
    assert [is_combining(sym) for sym in line] == \
        [False, True, False, False]


def test_issue_17616():
    assert pretty(pi**(1/exp(1))) == \
   '  / -1\\\n'\
   '  \\e  /\n'\
   'pi     '

    assert upretty(pi**(1/exp(1))) == \
   ' ⎛ -1⎞\n'\
   ' ⎝ℯ  ⎠\n'\
   'π     '

    assert pretty(pi**(1/pi)) == \
    '  1 \n'\
    '  --\n'\
    '  pi\n'\
    'pi  '

    assert upretty(pi**(1/pi)) == \
    ' 1\n'\
    ' ─\n'\
    ' π\n'\
    'π '

    assert pretty(pi**(1/EulerGamma)) == \
    '      1     \n'\
    '  ----------\n'\
    '  EulerGamma\n'\
    'pi          '

    assert upretty(pi**(1/EulerGamma)) == \
    ' 1\n'\
    ' ─\n'\
    ' γ\n'\
    'π '

    z = Symbol("x_17")
    assert upretty(7**(1/z)) == \
    'x₁₇___\n'\
    ' ╲╱ 7 '

    assert pretty(7**(1/z)) == \
    'x_17___\n'\
    '  \\/ 7 '


def test_issue_17857():
    assert pretty(Range(-oo, oo)) == '{..., -1, 0, 1, ...}'
    assert pretty(Range(oo, -oo, -1)) == '{..., 1, 0, -1, ...}'


def test_issue_18272():
    x = Symbol('x')
    n = Symbol('n')

    assert upretty(ConditionSet(x, Eq(-x + exp(x), 0), S.Complexes)) == \
    '⎧  │         ⎛      x    ⎞⎫\n'\
    '⎨x │ x ∊ ℂ ∧ ⎝-x + ℯ  = 0⎠⎬\n'\
    '⎩  │                      ⎭'
    assert upretty(ConditionSet(x, Contains(n/2, Interval(0, oo)), FiniteSet(-n/2, n/2))) == \
    '⎧  │     ⎧-n   n⎫   ⎛n         ⎞⎫\n'\
    '⎨x │ x ∊ ⎨───, ─⎬ ∧ ⎜─ ∈ [0, ∞)⎟⎬\n'\
    '⎩  │     ⎩ 2   2⎭   ⎝2         ⎠⎭'
    assert upretty(ConditionSet(x, Eq(Piecewise((1, x >= 3), (x/2 - 1/2, x >= 2), (1/2, x >= 1),
                (x/2, True)) - 1/2, 0), Interval(0, 3))) == \
    '⎧  │              ⎛⎛⎧   1     for x ≥ 3⎞          ⎞⎫\n'\
    '⎪  │              ⎜⎜⎪                  ⎟          ⎟⎪\n'\
    '⎪  │              ⎜⎜⎪x                 ⎟          ⎟⎪\n'\
    '⎪  │              ⎜⎜⎪─ - 0.5  for x ≥ 2⎟          ⎟⎪\n'\
    '⎪  │              ⎜⎜⎪2                 ⎟          ⎟⎪\n'\
    '⎨x │ x ∊ [0, 3] ∧ ⎜⎜⎨                  ⎟ - 0.5 = 0⎟⎬\n'\
    '⎪  │              ⎜⎜⎪  0.5    for x ≥ 1⎟          ⎟⎪\n'\
    '⎪  │              ⎜⎜⎪                  ⎟          ⎟⎪\n'\
    '⎪  │              ⎜⎜⎪   x              ⎟          ⎟⎪\n'\
    '⎪  │              ⎜⎜⎪   ─     otherwise⎟          ⎟⎪\n'\
    '⎩  │              ⎝⎝⎩   2              ⎠          ⎠⎭'


def test_Str():
    from sympy.core.symbol import Str
    assert pretty(Str('x')) == 'x'


def test_symbolic_probability():
    mu = symbols("mu")
    sigma = symbols("sigma", positive=True)
    X = Normal("X", mu, sigma)
    assert pretty(Expectation(X)) == r'E[X]'
    assert pretty(Variance(X)) == r'Var(X)'
    assert pretty(Probability(X > 0)) == r'P(X > 0)'
    Y = Normal("Y", mu, sigma)
    assert pretty(Covariance(X, Y)) == 'Cov(X, Y)'


def test_issue_21758():
    from sympy.functions.elementary.piecewise import piecewise_fold
    from sympy.series.fourier import FourierSeries
    x = Symbol('x')
    k, n = symbols('k n')
    fo = FourierSeries(x, (x, -pi, pi), (0, SeqFormula(0, (k, 1, oo)), SeqFormula(
        Piecewise((-2*pi*cos(n*pi)/n + 2*sin(n*pi)/n**2, (n > -oo) & (n < oo) & Ne(n, 0)),
                  (0, True))*sin(n*x)/pi, (n, 1, oo))))
    assert upretty(piecewise_fold(fo)) == \
        '⎧                      2⋅sin(3⋅x)                                \n'\
        '⎪2⋅sin(x) - sin(2⋅x) + ────────── + …  for n > -∞ ∧ n < ∞ ∧ n ≠ 0\n'\
        '⎨                          3                                     \n'\
        '⎪                                                                \n'\
        '⎩                 0                            otherwise         '
    assert pretty(FourierSeries(x, (x, -pi, pi), (0, SeqFormula(0, (k, 1, oo)),
                                                 SeqFormula(0, (n, 1, oo))))) == '0'


def test_diffgeom():
    from sympy.diffgeom import Manifold, Patch, CoordSystem, BaseScalarField
    x,y = symbols('x y', real=True)
    m = Manifold('M', 2)
    assert pretty(m) == 'M'
    p = Patch('P', m)
    assert pretty(p) == "P"
    rect = CoordSystem('rect', p, [x, y])
    assert pretty(rect) == "rect"
    b = BaseScalarField(rect, 0)
    assert pretty(b) == "x"


def test_deprecated_prettyForm():
    with warns_deprecated_sympy():
        from sympy.printing.pretty.pretty_symbology import xstr
        assert xstr(1) == '1'

    with warns_deprecated_sympy():
        from sympy.printing.pretty.stringpict import prettyForm
        p = prettyForm('s', unicode='s')

    with warns_deprecated_sympy():
        assert p.unicode == p.s == 's'


def test_center():
    assert center('1', 2) == '1 '
    assert center('1', 3) == ' 1 '
    assert center('1', 3, '-') == '-1-'
    assert center('1', 5, '-') == '--1--'