What is JUnit mocking and how can I use it?

What is JUnit mocking and how can I use it?

JUnit mocking is a technique used in unit testing to create mock objects that simulate the behavior of real objects. This allows you to test components in isolation.

Can you give me an example of how to create a mock object in JUnit?

Sure! You can use libraries like Mockito. For example, you can create a mock like this: MyClass myMock = Mockito.mock(MyClass.class);.

How do I verify interactions with the mock object?

You can verify interactions using Mockito.verify(). For example: Mockito.verify(myMock).myMethod(); ensures that myMethod() was called on the mock.

What are some common pitfalls when using mocking?

Common pitfalls include overusing mocks, which can lead to fragile tests, and not properly resetting mocks between tests.