Spring boot Test with Mockito

Mocking Framworks

1. mockito
2. easymock
3. jmockit

Mockito in spring boot

    mockito framwork is builtin spring boot
    dependency -> spring-boot-starter-test

Mockito Test Process

1. setup
   set expectations with mock reponses
2. execute
   call the method want to test
3. assert
   check the result and verify that it is expected result
4. verify
   optionally.. verify calls (how many times called etc..)

Mokcito Test in Spring boot process

1. step 1 : create mock for the dao

    @Mock
    private MyDao myDao;

2. step 2: Inject mock into service

    //only inject dependencioes annotated with @Mock or @Spy
    @InjectMocks
    private MyService myService;

3. step3: set up expectations

    String aResponse = "Hello";
    when(doTimeWork()).thenReturn(aResponse);

4. step4: call method under test and assert results

    assertEquals(excpectedValue, doTimeWorkResult());