<dependency> <groupId>com.github.jmock</groupId> <artifactId>ymock</artifactId> <version>1.0.0</version> <scope>test</scope> </dependency> UserService userService = YMock.mock(UserService.class); User mockUser = new User("John Doe"); YMock.expect(userService.getUserById(1)).andReturn(mockUser); YMock.setFieldValue(userService, "isAdmin", true); YMock.ignore(userService.deleteUser(any(User.class))); YMock.verify(userService, times(2)).getUserById(anyInt()); boolean isAdmin = (boolean) YMock.getFieldValue(userService, "isAdmin"); YMock.reset(userService);