testing our code

About me

Alejandro Vidal Rodriguez
Director of Engineering @TribalScale

Agenda

Why we should test
Testing piramid
Slices
Mocking
Unit Testing
Integration testing
End to end testing
Coverage
How to pass your tests

Why we should test?

Bad Reasons

We want 100% coverage

Managements wants them

Somebody told me

They are cool

Increase a dashboard

Good Reasons

Sleep well

Go on holidays

Release with calm

Fearless refactoring

Avoid bugs

Release faster

Testing piramid

    https://martinfowler.com/articles/practical-test-pyramid.html

Testing piramid

Slices

Slices - Junit test

Unit test do not need any spring dependency

Slices - Junit test

@RunWith(MockitoJUnitRunner.class)
public class B2BClientBayPlanTest {

    @Mock
    MessageUtil messageUtil;
    @Mock
    SecurityUtility securityUtility;
    @Mock
    CustomUserDetails customUserDetails;


    @Test
    public void createHeader() {
        Mockito.when(securityUtility.getUserInfo()).thenReturn(customUserDetails);
        Mockito.when(customUserDetails.getUsername()).thenReturn("Alex");

        B2BClientBayPlan b2BClientBayPlan = new B2BClientBayPlan(messageUtil, securityUtility);

        B2bHeader b2bHeader = b2BClientBayPlan.createHeader("myAction");

        assertEquals("myAction", b2bHeader.getMessageHeader().getAction());
    }

    @Test
    public void sendToB2B() {
    }
}

Slices - Spring tests

@RunWith(SpringRunner.class)
@WebMvcTest(controllers = VoyageEnquiryController.class)
@TestPropertySource(properties = "eureka.client.enabled=false")
public class VoyageEnquiryTest {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    VoyageEnquiryService voyageEnquiryService;

    @MockBean
    ClientRegNewService clientRegNewService;

    @Test
    @WithMockUser
    public void searchVoyageEnquiry() throws Exception {
        List<VoyageEnquirySearchResultSO> resultList = new LinkedList<>();
        Mockito.when(voyageEnquiryService.searchVoyageEnquiry(any(VoyageEnquirySearchSO.class))).thenReturn(resultList);

        MvcResult result = this.mockMvc
                .perform(post("/searchVoyageEnquiry")
                        .content(VOYAGE_SEARCH)
                        .contentType(MediaType.APPLICATION_JSON_UTF8)
                        .content(VOYAGE_SEARCH_ID))
                .andExpect(status().isOk())
                .andReturn();

        assertEquals("{\"list\":[]}", result.getResponse().getContentAsString());
        Mockito.verify(voyageEnquiryService, Mockito.atLeastOnce()).searchVoyageEnquiry(any(VoyageEnquirySearchSO.class));
    }

Slices - Integration test

Slices - Security

Slices - Performance

Slices - UI

Mocking

Unit testing

@RunWith(MockitoJUnitRunner.class)
public class B2BClientBayPlanTest {

    @Mock
    MessageUtil messageUtil;
    @Mock
    SecurityUtility securityUtility;
    @Mock
    CustomUserDetails customUserDetails;


    @Test
    public void createHeader() {
        Mockito.when(securityUtility.getUserInfo()).thenReturn(customUserDetails);
        Mockito.when(customUserDetails.getUsername()).thenReturn("Alex");

        B2BClientBayPlan b2BClientBayPlan = new B2BClientBayPlan(messageUtil, securityUtility);

        B2bHeader b2bHeader = b2BClientBayPlan.createHeader("myAction");

        assertEquals("myAction", b2bHeader.getMessageHeader().getAction());
    }

    @Test
    public void sendToB2B() {
    }
}

Integration testing

@RunWith(SpringRunner.class)
@WebMvcTest(controllers = VoyageEnquiryController.class)
@TestPropertySource(properties = "eureka.client.enabled=false")
public class VoyageEnquiryTest {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    VoyageEnquiryService voyageEnquiryService;

    @MockBean
    ClientRegNewService clientRegNewService;

    @Test
    @WithMockUser
    public void searchVoyageEnquiry() throws Exception {
        List<VoyageEnquirySearchResultSO> resultList = new LinkedList<>();
        Mockito.when(voyageEnquiryService.searchVoyageEnquiry(any(VoyageEnquirySearchSO.class))).thenReturn(resultList);

        MvcResult result = this.mockMvc
                .perform(post("/searchVoyageEnquiry")
                        .content(VOYAGE_SEARCH)
                        .contentType(MediaType.APPLICATION_JSON_UTF8)
                        .content(VOYAGE_SEARCH_ID))
                .andExpect(status().isOk())
                .andReturn();

        assertEquals("{\"list\":[]}", result.getResponse().getContentAsString());
        Mockito.verify(voyageEnquiryService, Mockito.atLeastOnce()).searchVoyageEnquiry(any(VoyageEnquirySearchSO.class));
    }

Test coverage

Line coverage

Branch coverage

Fast coverage

how to pass your tests

Lets do test NOW!

Further reads

Questions?

contact

https://www.linkedin.com/in/alejandrovidalrodriguez

https://medium.com/@goofyahead

https://github.com/goofyahead