def METHOD_NAME(self):
    """Test _apply_fx_mask func."""
    dummy_fx_mask = np.ma.array((True, True, True))
    masked_data = np.ma.array(self.time_cube.data[0:3].astype('float64'),
                              mask=np.ma.array((False, True, False)))
    app_mask = _apply_fx_mask(dummy_fx_mask, masked_data)
    fixed_mask = np.ma.array(self.time_cube.data[0:3].astype('float64'),
                             mask=dummy_fx_mask)
    self.assert_array_equal(fixed_mask, app_mask)