def METHOD_NAME(self):
    """Test :func:`colour.models.rgb.prismatic.Prismatic_to_RGB` definition."""
    np.testing.assert_array_almost_equal(
        Prismatic_to_RGB(np.array([0.0, 0.0, 0.0, 0.0])),
        np.array([0.0, 0.0, 0.0]),
        decimal=7,
    )
    np.testing.assert_array_almost_equal(
        Prismatic_to_RGB(
            np.array([0.7500000, 0.1666667, 0.3333333, 0.5000000])
        ),
        np.array([0.25, 0.50, 0.75]),
        decimal=7,
    )