如何验证是否调用方法

调用

verify

尝试

test('ContactListPresenter test', () async {    Injector.configure(Flavor.MOCK);    MockView view = new MockView();    ContactListPresenter presenter = new ContactListPresenter(view);    presenter.loadContacts();    await untilCalled(view.onLoadContactsComplete(typed(any)));     //completes when view.onLoadContactsComplete(any) is called    verify(view.onLoadContactsComplete(typed(any))).called(1);});

如果没有一次调用该方法，则测试将失败。