def METHOD_NAME(self):
    """Test :func:`colour.notation.hexadecimal.RGB_to_HEX` definition."""
    self.assertEqual(
        RGB_to_HEX(np.array([0.45620519, 0.03081071, 0.04091952])),
        "#74070a",
    )
    self.assertEqual(
        RGB_to_HEX(np.array([0.00000000, 0.00000000, 0.00000000])),
        "#000000",
    )
    self.assertEqual(
        RGB_to_HEX(np.array([1.00000000, 1.00000000, 1.00000000])),
        "#ffffff",
    )
    np.testing.assert_equal(
        RGB_to_HEX(
            np.array(
                [
                    [10.00000000, 1.00000000, 1.00000000],
                    [1.00000000, 1.00000000, 1.00000000],
                    [0.00000000, 1.00000000, 0.00000000],
                ]
            )
        ),
        ["#fe0e0e", "#0e0e0e", "#000e00"],
    )