What are some examples of using Mockito in unit tests?

What are some examples of using Mockito in unit tests?

Mockito is a popular mocking framework for Java. Here are a few examples:

1. Mocking a Service: You can create a mock of a service class to test a controller without hitting the actual service.

   MyService myService = mock(MyService.class);
   when(myService.getData()).thenReturn(mockData);
   

2. Verifying Interactions: You can verify that certain methods were called on your mocks.

   verify(myService).getData();
   

3. Stubbing Methods: You can stub methods to return specific values when called.

   when(myService.calculate(5)).thenReturn(10);
   

Would you like more detailed examples or explanations?

Yes, can you explain how to verify interactions with mocks?

Certainly! Verifying interactions with mocks in Mockito is straightforward. After executing the code that uses your mock, you can use the verify() method to check if a specific method was called. For example:

verify(myService).getData();

You can also verify the number of times a method was called:

verify(myService, times(2)).getData();

This checks if getData() was called exactly twice. Would you like to know more about any specific aspect?

What about using Mockito with JUnit?

Using Mockito with JUnit is common for unit testing. You can use the @RunWith(MockitoJUnitRunner.class) annotation to initialize mocks automatically. Here's a simple example:

@RunWith(MockitoJUnitRunner.class)
public class MyServiceTest {
    @Mock
    MyService myService;

    @Test
    public void testGetData() {
        when(myService.getData()).thenReturn(mockData);
        // Your test logic here
    }
}

This setup allows you to focus on writing tests without manually initializing mocks. Do you have any other questions?