def test_rotated(self):
'''Test find_rotation_xy function'''
rotation = find_rotation_xy(self.pc1, self.pc2)
w1, v1 = np.linalg.eig(rotation[0:2, 0:2])
w2, v2 = np.linalg.eig(self.rotation[0:2, 0:2])
def test_perfectly_aligned(self):
'''Test find_rotation_xy function'''
rotation = find_rotation_xy(self.pc1, self.pc1)
assert_almost_equal(rotation, np.eye(3))