def METHOD_NAME(self):
    """Test the transformer behavior with a charge present."""
    driver = PySCFDriver(atom="Be 0 0 0", charge=1, spin=1)
    driver_result = driver.run()
    self.assertEqual(driver_result.num_alpha, 2)
    self.assertEqual(driver_result.num_beta, 1)
    trafo = FreezeCoreTransformer(freeze_core=True)
    driver_result_reduced = trafo.transform(driver_result)
    self.assertEqual(driver_result_reduced.num_alpha, 1)
    self.assertEqual(driver_result_reduced.num_beta, 0)