Тестирование фрагментов с помощью Robolectric 3.0

Question

У меня есть два фрагмента, связанных с деятельностью.

public class MainActivity extends AppCompatActivity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.activity_main); 

    LoginFragment loginFragment = new LoginFragment(); 
    FragmentManager fragmentManager = getSupportFragmentManager(); 
    FragmentTransaction fragmentTransaction =  
    fragmentManager.beginTransaction(); 
    fragmentTransaction.add(android.R.id.content,loginFragment); 
    fragmentTransaction.commit(); 
    } 

    public void userReg(View view){ 
    RegisterFragment regFragment = new RegisterFragment(); 
    FragmentManager fragmentManager1 = getSupportFragmentManager(); 
    FragmentTransaction fragmentTransaction1 = 
    fragmentManager1.beginTransaction(); 
    fragmentTransaction1.addToBackStack("added"); 
    fragmentTransaction1.replace(android.R.id.content,regFragment); 
    fragmentTransaction1.commit(); 
    } 

} 

Регистрационный фрагмент прилагается через кнопку. Теперь я хочу протестировать их в robolectric 3.0.

@RunWith(RobolectricGradleTestRunner.class) 
@Config(constants = BuildConfig.class,sdk = 21) 

public class MainActivityTest { 
MainActivity activity; 
@Before 
public void setUp(){ 
     activity= Robolectric.setupActivity(MainActivity.class); 
} 

@Test 
public void shouldNotBeNull(){ 
    assertNotNull(activity); 
    LoginFragment loginFragment = new LoginFragment(); 
    startFragment(loginFragment); 
    assertNotNull(loginFragment); 
    } 

@Test 
public void loginFragmentShouldNotBeNull(){ 
    RegisterFragment registerFragment = new RegisterFragment(); 
    startFragment(registerFragment); 
    assertNotNull(registerFragment); 

    } 
    @Test 
    public void registerFragmentShouldNotBeNull(){ 
    RegisterFragment registerFragment = new RegisterFragment(); 
    startFragment(registerFragment); 
    assertNotNull(registerFragment); 

    } 
} 

Эти линии жалуются

 startFragment(loginFragment); 
     startFragment(registerFragment); 

говоря, что startFragment (android.app.Fragment) не может быть применен в LoginFragment и зарегистрировать фрагмент соответственно.

Для обоих фрагментов импортировать

import android.support.v4.app.Fragment; 

так что это является причиной проблемы. Я мог бы исправить эту проблему, используя фиксированные фрагменты, но как насчет использования динамических?

Любые идеи?

Спасибо.

РЕДАКТИРОВАТЬ

Ошибка описано выше фиксируется. Я только что добавил

import static org.robolectric.shadows.support.v4.SupportFragmentTestUtil.startFragment; 

Однако, когда я запускаю тест, я получаю другое исключение.

java.lang.ClassCastException: org.robolectric.shadows.support.v4.SupportFragmentTestUtil$FragmentUtilActivity cannot be cast to android.support.v7.app.AppCompatActivity 

at fragments.LoginFragment.onCreateView(LoginFragment.java:64) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2074) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1286) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:758) 
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1671) 
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:532) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at org.robolectric.shadows.ShadowMessageQueue.dispatchMessage(ShadowMessageQueue.java:144) 
at org.robolectric.shadows.ShadowMessageQueue.access$100(ShadowMessageQueue.java:30) 
at org.robolectric.shadows.ShadowMessageQueue$1.run(ShadowMessageQueue.java:105) 
at org.robolectric.util.Scheduler.runOrQueueRunnable(Scheduler.java:293) 
at org.robolectric.util.Scheduler.postDelayed(Scheduler.java:143) 
at org.robolectric.shadows.ShadowMessageQueue.enqueueMessage(ShadowMessageQueue.java:126) 
at android.os.MessageQueue.enqueueMessage(MessageQueue.java) 
at android.os.Handler.enqueueMessage(Handler.java:631) 
at android.os.Handler.sendMessageAtTime(Handler.java:600) 
at android.os.Handler.sendMessageDelayed(Handler.java:570) 
at android.os.Handler.post(Handler.java:326) 
at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1557) 
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:654) 
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:621) 
at org.robolectric.shadows.support.v4.SupportFragmentTestUtil.startFragment(SupportFragmentTestUtil.java:17) 
at team.football.ael.MainActivityTest.loginFragmentShouldNotBeNull(MainActivityTest.java:34) 
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) 
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) 
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) 
at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:527) 
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) 
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:265) 
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:191) 
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:56) 
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:157) 
at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
at org.junit.runner.JUnitCore.run(JUnitCore.java:137) 
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) 
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234) 
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74) 
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) 



java.lang.ClassCastException: 

org.robolectric.shadows.support.v4. 
SupportFragmentTestUtil$FragmentUtilActivity 
cannot be cast to android.support.v7.app.AppCompatActivity 

at fragments.RegisterFragment.onCreateView(RegisterFragment.java:54) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2074) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1286) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:758) 
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1671) 
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:532) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at org.robolectric.shadows.ShadowMessageQueue.dispatchMessage(ShadowMessageQueue.java:144) 
at org.robolectric.shadows.ShadowMessageQueue.access$100(ShadowMessageQueue.java:30) 
at org.robolectric.shadows.ShadowMessageQueue$1.run(ShadowMessageQueue.java:105) 
at org.robolectric.util.Scheduler.runOrQueueRunnable(Scheduler.java:293) 
at org.robolectric.util.Scheduler.postDelayed(Scheduler.java:143) 
at org.robolectric.shadows.ShadowMessageQueue.enqueueMessage(ShadowMessageQueue.java:126) 
at android.os.MessageQueue.enqueueMessage(MessageQueue.java) 
at android.os.Handler.enqueueMessage(Handler.java:631) 
at android.os.Handler.sendMessageAtTime(Handler.java:600) 
at android.os.Handler.sendMessageDelayed(Handler.java:570) 
at android.os.Handler.post(Handler.java:326) 
at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1557) 
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:654) 
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:621) 
at org.robolectric.shadows.support.v4.SupportFragmentTestUtil.startFragment(SupportFragmentTestUtil.java:17) 
at team.football.ael.MainActivityTest.registerFragmentShouldNotBeNull(MainActivityTest.java:41) 
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) 
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) 
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) 
at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:527) 
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) 
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:265) 
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:191) 
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:56) 
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
at org.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:157) 
at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
at org.junit.runner.JUnitCore.run(JUnitCore.java:137) 
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) 
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234) 
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74) 
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) 

EDIT 2

Это мой RegisterFragment

public class RegisterFragment extends Fragment { 
private SessionManager session; 
EditText etEmail, etUsername, etPassword,etConfirmPassword; 
String email, userName, userPass,confirmPassword; 
Button registerButton; 

public RegisterFragment() { 
    // Required empty public constructor 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    // Inflate the layout for this fragment 
    View v = inflater.inflate(R.layout.fragment_register, container, false); 
    Toolbar myToolbar = (Toolbar) v.findViewById(R.id.toolbar); 
    ((AppCompatActivity)getActivity()).setSupportActionBar(myToolbar); 
    setHasOptionsMenu(true); 


    etEmail = (EditText)v.findViewById(R.id.name); 
    etUsername = (EditText)v.findViewById(R.id.user_name); 
    etPassword = (EditText)v.findViewById(R.id.user_pass); 
    etConfirmPassword = (EditText)v.findViewById(R.id.confirm_pass); 
    registerButton = (Button)v.findViewById(R.id.registerBtn); 
    // Session manager 
    // Session manager 
    session = new SessionManager(getActivity()); 

    if (session.isLoggedIn()) { 
     // User ites already logged in. Take him to main activity 
     Intent intent = new Intent(getActivity(), Welcome.class); 
     startActivity(intent); 

    } 
    registerButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      email = etEmail.getText().toString(); 
      userName = etUsername.getText().toString(); 
      userPass = etPassword.getText().toString(); 
      confirmPassword = etConfirmPassword.getText().toString(); 

      if(userPass.equals(confirmPassword)){ 

       registerUser(email, userName, userPass, confirmPassword); 

      }else{ 

       Toast.makeText(getActivity(),"Passwords don't match",Toast.LENGTH_SHORT).show(); 
      } 
     } 
    }); 

    return v; 
} 
private void registerUser(final String email, final String userName, 
          final String password,final String confirmPassword) { 
    // Tag used to cancel the request 

    //HttpsTrustManager.sssMethod(); 
    String tag_string_req = "req_register"; 


    StringRequest strReq = new StringRequest(Request.Method.POST, 
      Config.URL_REGISTER, new Response.Listener<String>() { 

     @Override 
     public void onResponse(String response) { 
      Log.d("Response", "Register Response: " + response.toString()); 

      try { 
       JSONObject jsonObject = new JSONObject(response); 
       if (jsonObject.getString("result").equals("success")) { 



        Toast.makeText(getActivity(),jsonObject.getString("message"), Toast.LENGTH_LONG).show(); 

        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(getActivity()); 
        SharedPreferences.Editor editor = settings.edit(); 
        editor.putString("id",""); 
        editor.putString("email", email); 
        editor.putString("user_name", userName); 
        editor.putString("user_pass", password); 
        editor.putString("confirm_pass", confirmPassword); 


       } 

       else if (jsonObject.getString("result").equals("fail")) { 

        Toast.makeText(getActivity(),jsonObject.getString("message"), Toast.LENGTH_LONG).show(); 

       } 

      }catch(JSONException e){ 
       e.printStackTrace(); 
      } 


     } 


    }, new Response.ErrorListener() { 

     @Override 
     public void onErrorResponse(VolleyError error) { 
      Log.e("Error", "Registration Error: " + error.getMessage()); 
      Toast.makeText(getActivity(), 
        error.getMessage(), Toast.LENGTH_LONG).show(); 

     } 
    }) { 

     @Override 
     protected Map<String, String> getParams() { 
      // Posting params to register url 
      Map<String, String> params = new HashMap<String, String>(); 
      params.put("id",""); 
      params.put("email", email); 
      params.put("user_name", userName); 
      params.put("user_pass", password); 
      params.put("confirm_pass", confirmPassword); 
      return params; 
     } 

    }; 

    // Adding request to request queue 
    AppController.getInstance().addToRequestQueue(strReq, tag_string_req); 
    } 

}

Answer 1

Ваши фрагменты наследуют от "поддержки фрагментов" (те из андроида библиотеки поддержки), но она startFragment() функция ожидает правильный фрагменты. Вы можете использовать SupportFragmentTestUtil.startFragment(fragment, activityClass)

Библиотека поддержки позволяет использовать фрагменты на уровнях API, где пока не поддерживаются фрагменты. Если ваше приложение должно работать на API 11 и выше (Android 3), вы можете получить свои фрагменты с android.app.Fragment напрямую