def test_frechet_densify_ndarray():
actual = shapely.frechet_distance(
shapely.linestrings([[0, 0], [100, 0]]),
shapely.linestrings([[0, 0], [50, 50], [100, 0]]),
densify=[0.1, 0.2, 1],
)
expected = np.array([50, 50.99019514, 70.7106781186548])
np.testing.assert_array_almost_equal(actual, expected)
def test_frechet_distance_densify_empty():
actual = shapely.frechet_distance(line_string, empty, densify=0.2)
assert np.isnan(actual)
def test_frechet_densify_invalid_values(densify):
with pytest.raises(shapely.GEOSException,
match="Fraction is not in range"):
shapely.frechet_distance(line_string, line_string, densify=densify)
def test_frechet_densify_nan():
actual = shapely.frechet_distance(line_string, line_string, densify=np.nan)
assert np.isnan(actual)
def test_frechet_distance_nan_for_invalid_geometry_inputs(geom1, geom2):
actual = shapely.frechet_distance(geom1, geom2)
assert np.isnan(actual)
def test_frechet_distance_densify(geom1, geom2, densify, expected):
actual = shapely.frechet_distance(geom1, geom2, densify=densify)
assert actual == pytest.approx(expected, abs=1e-12)