How to mock application context

Question

How do we mock an Application Context? I got a presenter which I intend to write a test for. The parameters it receives were a view and Context. How do I create a mock for context to work?

public TutorProfilePresenter(TutorProfileScreenView view, Context context){
     this.view = view;
     this.context = context
}
            
public void setPrice(float price,int selectedTopics){
      int topicsPrice = 0;
      if(selectedTopics>2)
      {
        topicsPrice = (int) ((price/5.0)*(selectedTopics-2));
      }
                    
                    
      view.setBasePrice(price,topicsPrice,selectedTopics,
                        price+topicsPrice);
}

Solution

As a base I would use the Mockito annotations( i assume you want to mock the view also):

public class TutorProfilePresenter{

   @InjectMocks
   private TutorProfilePresenter presenter;

   @Mock
   private TutorProfileScreenView viewMock;
   @Mock
   private Context contextMock;

   @Before
   public void init(){
       MockitoAnnotations.initMocks(this);
   }

   @Test
   public void test() throws Exception{
      // configure mocks
      when(contextMock.someMethod()).thenReturn(someValue);

      // call method on presenter

      // verify
      verify(viewMock).setBasePrice(someNumber...)
   }

}

This would inject ready to configure mocks into your class under test.

More insight on Mockito stubbing: sourceartists.com/mockito-stubbing