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- import numpy as np
- import pytest
- from shapely.geometry import Point, Polygon
- from shapely.prepared import PreparedGeometry, prep
- def test_prepared_geometry():
- polygon = Polygon([(0, 0), (1, 0), (1, 1), (0, 1)])
- p = PreparedGeometry(polygon)
- assert p.contains(Point(0.5, 0.5))
- assert not p.contains(Point(0.5, 1.5))
- def test_prep():
- polygon = Polygon([(0, 0), (1, 0), (1, 1), (0, 1)])
- p = prep(polygon)
- assert p.contains(Point(0.5, 0.5))
- assert not p.contains(Point(0.5, 1.5))
- def test_op_not_allowed():
- p = PreparedGeometry(Point(0.0, 0.0).buffer(1.0))
- with pytest.raises(TypeError):
- Point(0.0, 0.0).union(p)
- def test_predicate_not_allowed():
- p = PreparedGeometry(Point(0.0, 0.0).buffer(1.0))
- with pytest.raises(TypeError):
- Point(0.0, 0.0).contains(p)
- def test_prepared_predicates():
- # check prepared predicates give the same result as regular predicates
- polygon1 = Polygon([(0, 0), (0, 1), (1, 1), (1, 0), (0, 0)])
- polygon2 = Polygon([(0.5, 0.5), (1.5, 0.5), (1.0, 1.0), (0.5, 0.5)])
- point2 = Point(0.5, 0.5)
- polygon_empty = Polygon()
- prepared_polygon1 = PreparedGeometry(polygon1)
- for geom2 in (polygon2, point2, polygon_empty):
- with np.errstate(invalid="ignore"):
- assert polygon1.disjoint(geom2) == prepared_polygon1.disjoint(geom2)
- assert polygon1.touches(geom2) == prepared_polygon1.touches(geom2)
- assert polygon1.intersects(geom2) == prepared_polygon1.intersects(geom2)
- assert polygon1.crosses(geom2) == prepared_polygon1.crosses(geom2)
- assert polygon1.within(geom2) == prepared_polygon1.within(geom2)
- assert polygon1.contains(geom2) == prepared_polygon1.contains(geom2)
- assert polygon1.contains_properly(
- geom2
- ) == prepared_polygon1.contains_properly(geom2)
- assert polygon1.overlaps(geom2) == prepared_polygon1.overlaps(geom2)
- def test_prepare_already_prepared():
- polygon = Polygon([(0, 0), (1, 0), (1, 1), (0, 1)])
- prepared = prep(polygon)
- # attempt to prepare an already prepared geometry with `prep`
- result = prep(prepared)
- assert isinstance(result, PreparedGeometry)
- assert result.context is polygon
- # attempt to prepare an already prepared geometry with `PreparedGeometry`
- result = PreparedGeometry(prepared)
- assert isinstance(result, PreparedGeometry)
- assert result.context is polygon
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