MOCKING FOR UNIT TEST USING MOCKITO

MOCKING FOR UNIT TEST USING MOCKITO EKO KURNIAWAN KHANNEDY ▸ Principal R&D Engineer at Blibli.com ▸ Part of R&D Team at Blibli.com ▸ eko.k.khannedy@gdn-commerce.com

MOCKING FOR UNIT TEST USING MOCKITO AGENDA ▸ Mocking ▸ Stubbing ▸ Verification ▸ Capturing

MOCKING MOCKING FOR UNIT TEST

MOCKING IS CREATING OBJECTS THAT MIMIC THE BEHAVIOR OF REAL OBJECTS What is Mocking? MOCKING FOR UNIT TEST USING MOCKITO

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MOCKING FOR UNIT TEST USING MOCKITO MOCKING USING MOCKITO import static org.mockito.Mockito.*; HttpServletRequest request = mock(HttpServletRequest.class);

MOCKING FOR UNIT TEST USING MOCKITO MOCKING USING MOCKITO JUNIT RULE @Rule
 public MockitoRule mockitoRule = MockitoJUnit.rule(); @Mock
 private HttpServletRequest request;

MOCKING FOR UNIT TEST USING MOCKITO INJECTING MOCK WITH MOCKITO @Rule
 public MockitoRule mockitoRule = MockitoJUnit.rule(); @Mock
 private HttpServletRequest request; @InjectMocks
 private MyController controller;

STUBBING MOCKING FOR UNIT TEST

ADD BEHAVIOR TO MOCKING OBJECT What is Stubbing? MOCKING FOR UNIT TEST USING MOCKITO

MOCKING FOR UNIT TEST USING MOCKITO STUBBING USING MOCKITO when(request.getParameter("name")).thenReturn(...); assertEquals(..., request.getParameter("name")); when(request.getParameter("error")).thenThrown(...); request.getParameter("error"); // throw exception when(request.getParameter("return")).thenAnswer(...);

VERIFICATION MOCKING FOR UNIT TEST

VERIFY INTERACTION TO MOCKING OBJECT What is Verification? MOCKING FOR UNIT TEST USING MOCKITO

MOCKING FOR UNIT TEST USING MOCKITO STUBING USING MOCKITO verify(request).getParameter("name"); verify(request, times(2)).getParameter("..."); verifyNoMoreInteractions(request);

CAPTURING MOCKING FOR UNIT TEST

CAPTURING VALUE THAT INTERACT WITH MOCKING OBJECT What is Capturing? MOCKING FOR UNIT TEST USING MOCKITO

MOCKING FOR UNIT TEST USING MOCKITO CAPTURING USING MOCKITO JUNIT RULE @Captor
 private ArgumentCaptor merchantCaptor;

MOCKING FOR UNIT TEST USING MOCKITO GET VALUE FROM CAPTOR verify(merchantRepository).save(merchantCaptor.capture()); Merchant merchant = merchantCaptor.getValue();

DEMO

MOCKING FOR UNIT TEST USING MOCKITO REFERENCES ▸ https://github.com/mockito/mockito/wiki ▸ https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features- testing.html