def test_mul_rotation(r1, i1, r2, i2, expected, expected_i):
r1 = Rotation(r1)
r1.improper = i1
r2 = Rotation(r2)
r2.improper = i2
r = r1 * r2
assert isinstance(r, Rotation)
assert np.allclose(r.data, expected)
assert np.all(r.improper == expected_i)
def test_antipodal(rotation, improper):
rotation = Rotation(rotation)
rotation.improper = improper
a = rotation.antipodal
assert np.allclose(a[0].data, rotation.data)
assert np.allclose(a[1].data, -rotation.data)
assert np.allclose(a[0].improper, rotation.improper)
assert np.allclose(a[1].improper, rotation.improper)