def METHOD_NAME(self):
    """Check that an exception is raised if the input percentiles
    are not evenly spaced."""
    cube = set_up_percentile_cube(
        np.sort(ECC_TEMPERATURE_REALIZATIONS.copy(), axis=0),
        np.array([25, 50, 90], dtype=np.float32),
    )
    msg = r"The percentile cube provided cannot be rebadged as ensemble realizations.*"
    with self.assertRaisesRegex(ValueError, msg):
        Plugin().process(cube)