Mockito is a mocking framework that tastes really good. It lets you write beautiful tests with a clean & simple API. Mockito doesn’t give you hangover because the tests are very readable and they produce clean verification errors. For more detail, see https://site.mockito.org
Mockito: 3 Ways to Init Mock in JUnit 5
Initialize Mockito mock objects in JUnit 5 using MockitoExtension, MockitoAnnotations#initMocks, or Mockito#mock.
Mockito: ArgumentCaptor
Three ways to create ArgumentCaptor in unit tests (Mockito JUnit Runner, annotations, or factory method) and its different usage.
Mockito: 4 Ways to Verify Interactions
Verify interaction with mock objects with verify(), verifyZeroInteractions() verifyNoMoreInteractions(), and inOrder().
Mockito: 3 Ways to Init Mock in JUnit 4
Initialize Mockito mock objects in JUnit 4 using MockitoJUnitRunner, MockitoAnnotations#initMocks, or Mockito#mock.
Testing with GwtMockito
My recent bug fixing experience on Google Web Kit (GWT) with GwtMockito: problem understanding, code refactoring, mocking framework preparation, testing, and comparison between GwtMockito and GWTTestCase.