'Test an interpolation with a gradient turned off.'

@pytest.mark.parametrize('percentage,    expected', [(0, (0, 0, 0)), (99, (0, 0, 0)), (100, (255, 255, 255))])
def test_interpolation_none(self, percentage, expected):

    color = utils.interpolate_color(Color(0, 0, 0), Color(255, 255, 255), percentage, None)
    assert isinstance(color, QColor)
    assert (Color(color) == Color(*expected))
