def test_repeat_shear_setting():
"""Test repeatedly setting shear with a lower triangular matrix."""
# Note this test is needed to check lower triangular
# decomposition of shear is working
mat = np.eye(3)
mat[2, 0] = 0.5
transform = Affine(shear=mat.copy())
# Check shear decomposed into lower triangular
np.testing.assert_almost_equal(mat, transform.shear)
# Set shear to same value
transform.shear = mat.copy()
# Check shear still decomposed into lower triangular
np.testing.assert_almost_equal(mat, transform.shear)
# Set shear to same value
transform.shear = mat.copy()
# Check shear still decomposed into lower triangular
np.testing.assert_almost_equal(mat, transform.shear)
def test_affine_properties_setters():
transform = Affine()
transform.translate = [8, -5]
npt.assert_allclose(transform.translate, [8, -5])
transform.scale = [2, 3]
npt.assert_allclose(transform.scale, [2, 3])
transform.rotate = 90
npt.assert_almost_equal(transform.rotate, [[0, -1], [1, 0]])
transform.shear = [1]
npt.assert_almost_equal(transform.shear, [1])
