JUnit is a popular Java-based unit testing framework that allows developers to test individual units of code. In Mockito, we can mock non-static methods, but not static methods. This is because static methods are associated with a class, rather than an instance of a class. As a result, they can't be stubbed or mocked. However, there are some workarounds that can be used to test static methods. One option is to refactor the code so that the static method is called from an instance method. Another option is to use PowerMock, a tool that extends Mockito to allow mocking of static methods. Overall, while it's not possible to directly mock static methods in Mockito, there are some workaround solutions that can be used.