def METHOD_NAME(traj2):
    traj2_line1 = traj2.atom_slice((0, 1))
    traj2_line2 = traj2.atom_slice((2, 3))
    directors = order._compute_director(traj2_line1)
    assert eq(directors,
              np.array([[1, 0, 0],  # Frame 0
                        [0, 1, 0],  # Frame 1
                        [0, 0, 1],  # Frame 2
                        [1, 0, 0],  # Frame 3
                        [1, 0, 0],  # Frame 4
                        ]))
    directors = order._compute_director(traj2_line2)
    assert eq(directors,
              np.array([[1, 0, 0],  # Frame 0
                        [0, 1, 0],  # Frame 1
                        [0, 0, 1],  # Frame 2
                        [0, 1, 0],  # Frame 3
                        [0, 0, 1],  # Frame 4
                        ]))