我怎么知道是否显示了一个片段（测试UI）

Question

如果我的片段之一，rattingfragment，我必须执行点击。如果不是，请执行其他操作。

我怎么知道这是我屏幕上的片段？

Android UI 测试。在我的代码下面进行测试编辑代码：

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

    @After
    public void setUp(){
        Logout();
    }  
  @Test
    public void shouldOfferRide(){
        SystemClock.sleep(1500);
        Login();
        onView(withId(R.id.searchButton)).perform(typeText(emailSearch));
        onView(withId(R.id.searchButton)).perform(pressImeActionButton());
        onView(withId(R.id.community_user_ask_button)).perform(click());
        SystemClock.sleep(1500);
        onView(withId(R.id.button1)).perform(click());
        onView(withId(R.id.send_request)).perform(click());
        SystemClock.sleep(1500);
        ((MainActivity)mActivityRule.getActivity()).navItemClick(4);
        SystemClock.sleep(3500);
        LoginMyrides();
        onView(withId(R.id.my_rides_tab_bar)).perform(click());
        SystemClock.sleep(1000);

        {I have to know is ratingfragment before perform click below}

        onView(withId(R.id.rating_bar)).perform(click());
        onView(withId(R.id.deny_btn)).perform(click());
    }

        public void Login(){
        onView(withId(R.id.edt_new_login_email)).perform(typeText(emailLogin));
        onView(withText(R.string.next_button)).perform(click());
        onView(withId(R.id.edt_new_password)).perform(typeText(senha));
        onView(withText(R.string.login_new_pass)).perform(click());
    }

    public void Logout(){
        new SessionManager(mActivityRule.getActivity()).logoutUser();
    }
}

Answer 1

If you want to know it in activity, then just use:

Fragment fragment = getFragmentManager().findFragmentByTag(stringTag);
if (fragment != null) { 
       //here it means the fragment is been shown
}

And If you want to know it in fragment then do your stuff in fragment's any of the following life cycle method:


onAttach(); 
onCreate(); 
onCreateView(); 
onActivityCreated(); 
onStart(); //or
onResume();

一旦您的片段显示在屏幕上，就会调用这些。参考：https://developer.android.com/guide/components/fragments.html#Creating

Answer 2

在您的片段中使用以下函数：

 @Override
 public void setUserVisibleHint(boolean isVisibleToUser) {
    super.setUserVisibleHint(isVisibleToUser);

    if (isVisibleToUser) {
        //fragment is visible on screen...do your stuff here
    } 
    else {
        // fragment is no longer visible
    }
 }

Answer 3

Espresso 专为测试而设计，可以按照配方一步步进行，无需做出任何决定。您应该考虑片段何时可见以及何时不可见的情况。然后为每个场景编写单独的测试。

我怎么知道是否显示了一个片段（测试UI）

How I know if one fragment is displayed (Test UI)

testing

android

functional-testing