如何使用Espresso为RecyclerView内的项目设置IdlingResource？

Question

我有一项活动。它包含片段，这个片段有RecyclerView。一些数据从服务器加载并显示在RecyclerView的第一项内。

我需要为此项设置IdlingResource。因此，当数据将从服务器加载并显示在此项目内时，必须开始测试。

如何为RecyclerView中的项目设置IdlingResource？

Answer 1

RecyclerView上的空闲资源

我不确定这是我们的用法，但是它的工作原理...

在您的片段中：

    public interface RecyclerViewHaveDataListener {
        void recyclerViewHaveData();
    }

    private RecyclerViewHaveDataListener callbackIdl;

    @VisibleForTesting
    public void registerOnCallBackIdl(RecyclerViewHaveDataListener callbackIdl){
      this.callbackIdl = callbackIdl;
      if (adapter.getItemCount() > 0){
          this.callbackIdl.recyclerViewHaveData();
          this.callbackIdl = null;
      }
    }

     // Use this where you add your datas to your RecyclerView by your adapter
     if (callbackIdl != null && adapter.getItemCount() > 0){
            callbackIdl.recyclerViewHaveData();
            callbackIdl = null;
     }

在您的测试包中：

public class RecyclerViewIdlingRes implements IdlingResource, YourFragment.RecyclerViewHaveDataListener {

    private String name;
    private boolean isIdle;

    private volatile ResourceCallback resourceCallback;

    public RecyclerViewIdlingRes(String name) {
        this.name = name;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public boolean isIdleNow() {
        return isIdle;
    }

    @Override
    public void registerIdleTransitionCallback(ResourceCallback callback) {
        this.resourceCallback = callback;
    }

    @Override
    public void recyclerViewHaveData() {
        if (resourceCallback == null){
            return;
        }
        isIdle = true;
        resourceCallback.onTransitionToIdle();
    }
}

在测试中：

    @Test
    public void itemIsComming(){
        RecyclerViewIdlingRes mIdl = new RecyclerViewIdlingRes("idlingRecyclerView");
        IdlingRegistry.getInstance().register(mIdl);
        Fragment fragment = activity.getSupportFragmentManager().findFragmentById(R.id.activity_main_frame_layout);
        if (fragment instanceof YourFragment) {
            ((YourFragment)fragment).registerOnCallBack(mIdl);
        }
        onIdle();
        IdlingRegistry.getInstance().unregister(mIdl);

        // DO YOUR STUFF...
     }

Answer 2

好的方法是实现自己的IdlingResource，它将在数据加载完成后通知Espresso。你可以在这里找到一些例子 - How to use Espresso Idling Resource for network calls