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- import unittest
- from shapely.geometry import LineString, Polygon
- from shapely.ops import snap
- class Snap(unittest.TestCase):
- def test_snap(self):
- # input geometries
- square = Polygon([(1, 1), (2, 1), (2, 2), (1, 2), (1, 1)])
- line = LineString([(0, 0), (0.8, 0.8), (1.8, 0.95), (2.6, 0.5)])
- square_coords = square.exterior.coords[:]
- line_coords = line.coords[:]
- result = snap(line, square, 0.5)
- # test result is correct
- assert isinstance(result, LineString)
- assert result.coords[:] == [(0.0, 0.0), (1.0, 1.0), (2.0, 1.0), (2.6, 0.5)]
- # test inputs have not been modified
- assert square.exterior.coords[:] == square_coords
- assert line.coords[:] == line_coords
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