def METHOD_NAME(self):
    """Test :func:`colour.colorimetry.generation.msds_ones` definition."""
    msds = msds_ones(labels=["a", "b", "c"])
    np.testing.assert_equal(msds[360], np.array([1, 1, 1]))
    np.testing.assert_equal(msds[555], np.array([1, 1, 1]))
    np.testing.assert_equal(msds[780], np.array([1, 1, 1]))