Mockito 활용: 1. Mock 생성하기

* Mock 생성하기

1. mock() 사용
    @Test
    public void test() {
        World world = mock(World.class);
        hello.setWorld(world);

    }

2. @Mock Annotation 과 Runner 설정 (@RunWith)
    @RunWith(MockitoJUnitRunner.class)
    public class HelloTest {
        
        private Hello hello = new Hello();

        @Mock
        private World world;

        @Test
        public void test() {
            hello.setWorld(world);
        }
    }

3. @Mock, @InjectMocks Annotation 과 MockitoAnnotations.initMocks() 사용
    public class HelloTest {

        @InjectMocks
        private Hello hello = new Hello();

        @Mock
        private World world;

        @Before

        public void setUp() {
            //hello instance 의 world member 에 mock object가 injection 됨

            MockitoAnnotations.initMocks(this);
        }

} 

public class Hello {

    private World world = new World();

    public void setWorld(World world) {
       this.world = world;
    }
}

> 참고 : Mockito 활용 : 2.Mock Injection