What is Mockito and how do I use it in Java?

What is Mockito and how do I use it in Java?

Mockito is a popular mocking framework for Java that allows you to create mock objects for unit testing. It helps isolate the code being tested by simulating the behavior of dependencies.

Can you give me an example of how to create a mock object using Mockito?

Sure! You can create a mock object using the Mockito.mock() method. For example: List mockedList = Mockito.mock(List.class); This creates a mock instance of a List.

How do I verify interactions with the mock object?

You can verify interactions using the Mockito.verify() method. For example: Mockito.verify(mockedList).add("one"); This checks if the add method was called with the argument "one".

What are some common annotations used in Mockito?

Common annotations include @Mock for creating mock objects, @InjectMocks for injecting mocks into the class under test, and @Before for setting up tests.