FragmentTest.java

@RunWith(AndroidJUnit4.class) public class FragmentTest {                                        
                                                                                                    
  // Setup an ActivityTestRule as such that the Activity is not launched until we say so             
  @Rule public ActivityTestRule<EmptyActivity> rule =                                                
      new ActivityTestRule<>(EmptyActivity.class, true, false);                                      
                                                                                                    
  private Fragment fragment;                                                                         
  private EmptyActivity activity;                                                                    
                                                                                                    
  @Before public void setup() {                                                                      
    // Setup shared mock information or do your dependency injection                                                                 
    fragment = new YourFragment();                                                              
  }                                                                                                  
                                                                                                    
  @Test public void fragmentTest() {                                                                 
    // Setup your test specific mocks here                                                           
                                                                                                    
    activity = rule.launchActivity(new Intent());                                                    
    activity.getSupportFragmentManager()                                                             
        .beginTransaction()                                                                          
        .replace(R.id.fragment, fragment)                                                            
        .commit();                                                                                   
                                                                                                    
    // Write your assertions here                                                                    
  }                                                                                                  
}