def METHOD_NAME(self):
    rt = iris.coords.DimCoord(48, 'forecast_reference_time',
                              units='hours since epoch')
    fp = iris.coords.DimCoord(6, 'forecast_period', units='hours')
    result = other_time_coord(rt, fp)
    expected = iris.coords.DimCoord(54, 'time', units='hours since epoch')
    self.assertEqual(result, expected)