def METHOD_NAME(self):
    system = self.system
    # place particle in cell with MPI rank 0
    p = system.part.add(pos=0.01 * system.box_l, rotation=3 * [True])
    p.rotate((1, 0, 0), -np.pi / 2)
    np.testing.assert_array_almost_equal(
        np.copy(p.director), [0, 1, 0], decimal=10)
    # place particle in cell with MPI rank N-1
    p = system.part.add(pos=0.99 * system.box_l, rotation=3 * [True])
    p.rotate((1, 0, 0), -np.pi / 2)
    np.testing.assert_array_almost_equal(
        np.copy(p.director), [0, 1, 0], decimal=10)