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將，我有MainActivity持有MainFragment， MainFragment實現RecipeDataFetcher回調接口，通過在RecipeDataFetcher類通過Volley /網絡獲取數據。 MainFragment有是假設顯示一對夫婦的食譜卡recyclerview如何使用Espresso測試Recycler視圖中使用抽象獲取數據的片段使用IdlingResource
-I需要在RecyclerView項目執行測試
這是我的主要fragment`public類
MainFragment extends Fragment implements RecipesRecyclerAdapter.OnRecipeItemSelected,
RecipesDataFetcher.RecipesFetcherDataListener {
private View v;
private RecipesDataFetcher recipesDataFetcher;
private OnFragmentInteractionListener mListener;
private RecyclerView recyclerView;
private RecipesRecyclerAdapter recipesRecyclerAdapter;
private Recipes mRecipes;
private RecyclerView.LayoutManager layoutManager;
private SimpleIdlingResource mIdlingResource;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v = inflater.inflate(R.layout.fragment_main, container, false);
mRecipes = new Recipes();
recyclerView = (RecyclerView) v.findViewById(R.id.rv_recipes);
if (mTwoPanel) {
layoutManager = new GridLayoutManager(getActivity(), 2);
} else {
layoutManager = new LinearLayoutManager(getActivity());
}
recipesRecyclerAdapter = new RecipesRecyclerAdapter(this, mRecipes);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(recipesRecyclerAdapter);
return v;
}
@VisibleForTesting
@NonNull
public SimpleIdlingResource getIdlingResource() {
if (mIdlingResource == null) {
mIdlingResource = new SimpleIdlingResource();
}
return mIdlingResource;
}
@Override
public void onSaveInstanceState(Bundle outState) {
// super.onSaveInstanceState(outState);
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
@Override
public void onItemSelected(int itemPosition) {
mListener.onFragmentInteraction(mRecipes.get(itemPosition), mRecipes.size());
}
@Override
public void onResume() {
super.onResume();
if (mRecipes.isEmpty()) {
getData();
}
}
@Override
public void onConnectionFailure() {
if (!checkOnlineState(getActivity())) {
Logging.shortToast(getActivity(), getString(R.string.internet_error));
} else {
Logging.shortToast(getActivity(), getString(R.string.server_error));
}
}
private void getData() {
recipesDataFetcher = new RecipesDataFetcher(getActivity(), this);
recipesDataFetcher.getRecipes(mIdlingResource);
}
@Override
public void onConnectionDone(Recipes recipes) {
mRecipes.addAll(recipes);
recipesRecyclerAdapter.notifyDataSetChanged();
//TODO: Do bulk inset in a background thread and for once
ContentValues[] contentValues = new ContentValues[recipes.size()];
for (int i = 0; i < recipes.size(); i++) {
ContentValues contentValue = new ContentValues();
Gson gson = new Gson();
String ingredients = gson.toJson(recipes.get(i).getIngredients());
String steps = gson.toJson(recipes.get(i).getSteps());
contentValue.put(COLUMN_RECIPE_INGREDIENTS, ingredients);
contentValue.put(COLUMN_RECIPE_STEPS, steps);
contentValue.put(COLUMN_RECIPE_SERVINGS, recipes.get(i).getServings());
contentValue.put(COLUMN_RECIPE_IMAGE, recipes.get(i).getImage());
contentValue.put(COLUMN_RECIPE_NAME, recipes.get(i).getName());
contentValues[i] = contentValue;
}
getContext().getContentResolver().bulkInsert(CONTENT_URI, contentValues);
if(mIdlingResource!=null){
mIdlingResource.setIdleState(true);
}
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(Recipe recipe, int size);
}`
這裏是我dataFetching類
public class RecipesDataFetcher extends BaseDataFetcher {
public RecipesDataFetcher(Context context, BaseDataFetcherListener mListener) {
super(context, mListener);
}
public void getRecipes(SimpleIdlingResource simpleIdlingResource) {
if(simpleIdlingResource!=null){
simpleIdlingResource.setIdleState(false);}
String URL = BaseURL;
Logging.log("getCountries: " + URL);
JsonArrayRequest jsonObjReq = new JsonArrayRequest(URL, (JSONArray jsonArr) -> {
Logging.log("getCountries response: " + jsonArr.toString());
Recipes recipes = new Recipes(jsonArr);
((RecipesFetcherDataListener) mListener).onConnectionDone(recipes);
if(simpleIdlingResource!=null){
simpleIdlingResource.setIdleState(true);
}
}, this.errorListener);
retryPolicy(jsonObjReq);
getReQ().add(jsonObjReq);
}
public interface RecipesFetcherDataListener extends BaseDataFetcherListener {
void onConnectionDone(Recipes recipes);
}
}
的下面是我的測試類
@RunWith(AndroidJUnit4.class)
public class MyFragmentTest {
private SimpleIdlingResource mIdlingResource;
@Rule
public FragmentTestRule<MainFragment> mFragmentTestRule = new FragmentTestRule<>(MainFragment.class);
@Before
public void registerIdlingResource() {
// Launch the activity to make the fragment visible
mFragmentTestRule.launchActivity(null);
mIdlingResource = mFragmentTestRule.getFragment().getIdlingResource();
Espresso.registerIdlingResources(mIdlingResource);
}
@Test
public void fragment_can_be_instantiated() {
// Then to test item in position 0
onView(withId(R.id.rv_recipes))
.perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));
}
// unregister resources
@After
public void unregisterIdlingResource() {
if (mIdlingResource != null) {
Espresso.unregisterIdlingResources(mIdlingResource);
}
}
}
最後here是整個代碼項目，只是讓我知道我在做什麼錯了究竟：d，您的幫助將得到高度讚賞。
可以提醒你所面對的問題！？ – Ibrahim
@IbrahimAli你提到這個問題是什麼意思？ ：/ –