在不使用 Dagger 的情况下使用 Espresso ActivityTestRule 初始化时模拟活动的 onCreate

Question

我尝试使用 espresso 初始化我的活动并模拟 onCreate，但没有在我的项目中添加 Dagger 时没有找到好的解决方案：

@Rule
public ActivityTestRule<MyActivity> mActivityRule = new ActivityTestRule<>(MyActivity.class);

我也尝试创建自定义规则，但这并没有帮助，因为我无法在活动创建之前模拟活动... 只是在创建之后，但是当时的onCreate已经被调用了。

public class MyCustomRule<A extends MyActivity> extends ActivityTestRule<A> { ....
  @Override
  protected void beforeActivityLaunched(){super.beforeActivityLaunched();}
  @Override
  protected Intent getActivityIntent() {...}
  @Override
  protected void afterActivityLaunched() {...}
  @Override
  protected void afterActivityFinished() {...}
}

Answer 1

我使用SingleActivityFactory找到了解决问题的方法：

private SingleActivityFactory<MyActivity> injectedFactory = new SingleActivityFactory<MyActivity>(MyActivity.class) {
 @Override
 protected MyActivity create(Intent intent) {
    MyActivity activity = new MockMyActivity();
    return activity;
 }
};

并使用它来创建规则

@Rule
public ActivityTestRule<MyActivity> mActivityRule = new ActivityTestRule<>(injectedFactory, false, true);

你的 MockMyActivity.class 看起来像这样：

public class MockMyActivity extends MyActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {  
      super.onCreate(savedInstanceState);
      // you can add some of your logic here
    }

    @Override
    protected MyFragment findOrCreateViewFragment() {
      MyFragment myFragment = (MyFragment) getSupportFragmentManager().findFragmentById(R.id.contentFrame);
      if (myFragment == null) {
         //spy-mock your fragment
         myFragment = spy(new MyFragment());
         // ex do not load data from the web service
         doNothing().when(myFragment).callLoadMyService();

        ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), myFragment, R.id.contentFrame);
      }
      return myFragment;
}