def test_invalid_no_material(self, tmp_path):
v = VTK.from_image_data(
np.random.randint(5, 10, 3) * 2,
np.random.random(3) + 1.0)
v.save(tmp_path / 'no_materialpoint.vti', parallel=False)
with pytest.raises(ValueError):
Grid.load(tmp_path / 'no_materialpoint.vti')
def default():
"""Simple VTK."""
cells = np.array([5, 6, 7], int)
size = np.array([.6, 1., .5])
return VTK.from_image_data(cells, size)
