問題描述

在 MVP 模式中描繪您的演示者訂閱返回觀察者的服務的情況:

Picture the situation in an MVP pattern where your presenter subscribes to a service returning an observer:

public void gatherData(){
   service.doSomeMagic()
      .observeOn(Schedulers.io())
      .subscribeOn(AndroidSchedulers.mainThread())
      .subscribe(new TheSubscriber());
}

現在類 TheSubscriber 從視圖中調用 onNext 一個方法，比如:

Now the class TheSubscriber calls onNext a method from the view, say:

@Override public void onNext(ReturnValue value) {
  view.displayWhatever(value);
}

現在，在我的單元測試中，我想驗證在非錯誤情況下調用方法 gatherData() 時，視圖的方法 displayWhatever(value) 被調用.

Now, in my unit test I would like to verify that when the method gatherData() is called on a non-erroneous situation, the view's method displayWhatever(value) is called.

問題:

有沒有干凈的方法來做到這一點?

Is there a clean way to do this?

背景:

• 我正在使用 mockito 來驗證交互，當然還有更多
• Dagger 正在注入除 TheSubscriber
之外的整個 Presenter

• I'm using mockito to verify the interactions and a lot more of course
• Dagger is injecting the entire presenter except for TheSubscriber

我嘗試了什么:

• 注入訂閱者并在測試中模擬它.我覺得有點臟，因為如果我想改變演示者與服務交互的方式(說不是 Rx)，那么我需要改變很多測試和代碼.
• 模擬整個服務.這還不錯，但需要我模擬很多方法，但我并沒有完全達到我想要的效果.
• 在互聯網上四處查找，但似乎沒有人有一種干凈直接的方法來做到這一點

感謝您的幫助

推薦答案

假設您正在以類似的方式使用 service 和 view 的接口:

Assuming that you are using interfaces for service and view in a similar manner:

class Presenter{
  Service service;
  View view;

  Presenter(Service service){
    this.service = service;
  }

  void bindView(View view){
    this.view = view;
  }

  void gatherData(){
    service.doSomeMagic()
      .observeOn(Schedulers.io())
      .subscribeOn(AndroidSchedulers.mainThread())
      .subscribe(view::displayValue);
  }
}

然后可以提供模擬來控制和驗證行為:

It is possible then to provide mock to control and verify behaviour:

@Test void assert_that_displayValue_is_called(){
  Service service = mock(Service.class);
  View view = mock(View.class);
  when(service.doSomeMagic()).thenReturn(Observable.just("myvalue"));
  Presenter presenter = new Presenter(service);
  presenter.bindView(view);

  presenter.gatherData();

  verify(view).displayValue("myvalue");
}

這篇關于驗證 rxjava 訂閱者中的交互的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！