def METHOD_NAME(self):
    """test creating cube with both thresholds set"""
    result = _make_mask_cube(
        self.mask, self.coords, [self.lower, self.upper], self.units
    )
    self.assertEqual(result.coord("topographic_zone").bounds[0][1], self.upper)
    self.assertEqual(result.coord("topographic_zone").bounds[0][0], self.lower)
    self.assertEqual(
        result.coord("topographic_zone").points, np.mean([self.lower, self.upper])
    )
    self.assertEqual(result.coord("topographic_zone").units, Unit("m"))