public async Task TestRestoreStateDuringPendingRequest()
{
//Interactor will return after a delay. We will cancel before this request returns
_mockInteractor.Setup(interactor => interactor.Login(It.IsAny <string>(), It.IsAny <string>()))
.Returns(Task.Run(() =>
{
Task.Delay(100).Wait();
return(new Result <bool>(true));
}));
_presenter.UpdateUsername("User");
_presenter.UpdatePassword("Pass");
Task task = _presenter.Login();
//null out view reference so that view will not be updated by this presenter
IList <string> state = _presenter.SaveState();
_presenter.View = null;
await task;
//Old presenter is destroyed. create new presenter and reattach to view
_presenter = new LoginPresenter(_view, _mockInteractor.Object);
Assert.False(_view.NavigatingToNextScreen);
await _presenter.RestoreState(state);
Assert.True(_view.NavigatingToNextScreen);
//Login should have been called twice total. Once in the old presenter and once after restoring
_mockInteractor.Verify(interactor => interactor.Login(It.IsAny <string>(), It.IsAny <string>()), Times.Exactly(2));
}
public async Task TestRestorePresenterInputState()
{
Assert.False(_view.NavigatingToNextScreen);
_presenter.UpdateUsername("User");
_presenter.UpdatePassword("Pass");
IList <string> state = _presenter.SaveState();
//Old presenter is destroyed. create new presenter and reattach to view
_presenter = new LoginPresenter(_view, _mockInteractor.Object);
await _presenter.Login();
//Login is not called. We have not restored state so the presenter does not have the input credentials
_mockInteractor.Verify(interactor => interactor.Login(It.IsAny <string>(), It.IsAny <string>()), Times.Never);
Assert.False(_view.NavigatingToNextScreen);
await _presenter.RestoreState(state);
await _presenter.Login();
//Now that we have restored state, Login should have been requested successfully
_mockInteractor.Verify(interactor => interactor.Login(It.IsAny <string>(), It.IsAny <string>()), Times.Once);
Assert.True(_view.NavigatingToNextScreen);
}
