mockito

@ExtendWith(MockitoExtension.class) class ArticleManagerTest { @Mock ArticleDatabase database; @Mock User user; @Spy @InjectMocks private ArticleManager manager; @BeforeEach void setup(){ // some initialization codes } @Test void shouldDoSomething() { // TODO perform some tests with this managers when(database.some(param)).thenReturn(data); Object res = manager.exe(); assertEquals(res, "data"); verify(database).some(param); } } Reading more: Unit tests with Read more…