def testNHWCtoHWNC(self):
    x_val = [-4, -3, -2, -1, 0, 1, 2, 3]
    y_val_expected = [2, 0, 1, 3, 2, 0, 1, 3]
    x = constant_op.constant(x_val)
    y = nn_ops.data_format_dim_map(x, src_format="NHWC", dst_format="HWNC")