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eidher
eidher

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Testing with Mockito

#java #junit #mockito

1) Register MockitoExtension

@ExtendWith(MockitoExtension.class) class ObjectTest { static final Long ID = 1L;
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2) Create the mock

 @Mock private ObjectRepo mockRepo;
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3) Inject the mock

 @InjectMocks private ObjectService objectService; @Test void whenfindByIdThenReturnResult() { var objectDAO = new ObjectDAO(); objectDAO.setId(ID);
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4) Define the behavior

 when(mockRepo.findById(any(Long.class))).thenReturn(Optional.of(objectDAO));
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5) Test

 var result = ObjectService.findById(ID);
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6) Verify

 verify(mockRepo, times(1)).findById(any(Long.class));
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7) Validate

 assertAll( () -> assertNotNull(result), () -> assertEquals(objectDAO.getId(), result.getId()) ); } }
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