注射用dagger2测试模块注射用、模块、测试

2023-09-07 22:23:37 作者：我愿溺水

我用Dagger2在我的Android应用程序。基本上，我注入了的HttpClient （接口） MainActivity 。

I use Dagger2 in my android app. Basically I inject a HttpClient (interface) in MainActivity.

@Module
public class MainActivityModule{

   @Provides public HttpClient providesHttpComponent(){
        return new RealHttpClient();
    }
}

@Component( modules = MainActivityModule.class )
public interface MainActivityComponent {
   public MainActivity injectActivity(MainActivity);
}



public class MainActivity extends Activity {

   public void onCreate(Bundle saved){
      super.onCreate();

      injectDependencies();
   }


   protected void injectDependencies(){

      Dagger_MainActivityComponent
        .builder()
        .mainActivityComponent( new MainActivityModule())
        .build()
        .injectActivity(this);
   }

}

到目前为止好，那就像预期。现在我想写一些单元测试（而不是Android的仪器测试）为 MainActivity 在这里我想用 TestMainActivityModule 而不是 MainActivityModule 。

So far so good, that works like expected. Now I want to write some unit tests (not android instrumentation tests) for MainActivity where I want to use TestMainActivityModule instead of MainActivityModule.

@Module (overrides = true )
public class TestMainActivtiyModule extends MainActivityModule {

   @Provides public HttpClient(){
      return new MockHttpClient();
   }

}

我的问题是：如何强制 MainActivity 使用 TestMainActivitiyModule 而不是 MainActivityModule的？是否有一个良好的解决方案是什么？

My question is: How do I force MainActivity to use TestMainActivitiyModule instead of MainActivityModule? Is there a good solution for that?

我目前的做法是用继承和重写 getModule（），像这样

My current approach is to use inheritance and to override getModule(), something like this

public class TestMainActivity extend MainActivity {

   @Override
   protected void injectDependencies(){

      Dagger_MainActivityComponent
        .builder()
        .mainActivityComponent( new TestMainActivtiyModule())
        .build()
        .injectActivity(this);
   }
}

和运行对 TestMainActivity 单元测试，而不是 MainActivity 。

and to run unit test against TestMainActivity instead of MainActivity.

我想它的工作原理，但我面对这种方法的问题之一是，我无法启动 TestMainActivity 与意图，因为我不能在的AndroidManifest.xml

I guess it works, but one of the problems I'm facing with this approach is that I can't start TestMainActivity with an Intent because I can't specify it in AndroidManifest.xml

有谁知道单元测试与dagger2一个更好的方法在Android？

Does anyone know a better approach for unit testing with dagger2 on android?

注射用dagger2测试模块注射用、模块、测试

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