[Tools] 單元測試利器 mock

[Tools] 單元測試利器 mock

目前接觸專案常常需要寫很多測試案例，基於分層測試再整合測試的原則，若是分層測試已經寫完，要再寫整合測試時，其實當中的很多測試都已經通過了，再重寫一次未免太過繁雜，故使用 mock 來協助處理一些可以被忽略的事宜。
以下就是目前常使用的 mock 利器：


mockito
http://site.mockito.org
GitHub
https://github.com/mockito/mockito
簡易說明:
https://goo.gl/b0uZGi
https://goo.gl/7YmE6v
https://goo.gl/qVvvli
https://goo.gl/mUEEzZ

PowerMock
https://github.com/powermock/powermock
教學
https://github.com/powermock/powermock/wiki/gettingstarted
PS. mock static,private field 或 method

EasyMock
http://easymock.org
教學
http://easymock.org/getting-started.html
GitHub
https://github.com/easymock/easymock

[簡易範例]

	@RunWith(SpringJUnit4ClassRunner.class)
	@ContextConfiguration(locations = {"classpath:spring-mvc.xml", "classpath:spring-service.xml",
	"classpath:spring-mapper-test.xml"})
	@WebAppConfiguration
	public class ControllerTest {
	@Autowired
	private WebApplicationContext wac;
	@InjectMocks
	@Autowired
	Controller controller;
	@Mock
	Facade facade;
	private Entity entity;
	private List<Entity> entities;
	private String url;
	private MockMvc mockMvc;
	private static final String BASE_URL = "/test"
	@Before
	public void setUp() throws Exception {
	MockitoAnnotations.initMocks(this);
	mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
	prepareEntity();
	prepareEntities();
	}
	@Test
	public void testReadList() throws Exception {
	prepareTestReadList();
	mockMvc.perform(MockMvcRequestBuilders
	.get(url)
	.accept(MediaType.APPLICATION_JSON))
	.andDo(this::checkListHaveData);
	}
	@Test
	public void testReadListAnotherMethod() throws Exception {
	prepareTestReadList();
	mockMvc.perform(MockMvcRequestBuilders
	.get(url)
	.accept(MediaType.APPLICATION_JSON))
	.andDo(mvcResult -> Assert.assertEquals(HttpStatus.OK.value(), mvcResult.getResponse().getStatus()));
	}
	@Test
	public void testUpdateListAndGenXml() throws Exception {
	prepareTestUpdateListAndGenXml();
	String request = JsonUtils.getJsonTextByObject(entities);
	mockMvc.perform(MockMvcRequestBuilders.put(url)
	.content(request)
	.contentType(MediaType.APPLICATION_JSON)
	.accept(MediaType.APPLICATION_JSON))
	.andDo(mvcResult -> Assert.assertEquals(HttpStatus.OK.value(), mvcResult.getResponse().getStatus()));
	}
	private void prepareTestUpdateListAndGenXml() {
	url = BASE_URL + CoreConf.UPDATE_PATH;
	mockFacadeUpdateListAndGenXML();
	}
	private void mockFacadeUpdateListAndGenXML() {
	Mockito.doNothing().when(facade).UpdateListAndGenXML(Mockito.any());
	}
	private void prepareTestReadList() {
	url = BASE_URL + CoreConf.READ_PATH;
	mockFacadeReadList();
	}
	private void mockFacadeReadList() {
	Mockito.doReturn(entities).when(facade).findCenterListIsActive();
	}
	private void checkListHaveData(MvcResult mvcResult) throws UnsupportedEncodingException {
	MockHttpServletResponse response = mvcResult.getResponse();
	MockMvcUtils.checkResponseStatus(response);
	Assert.assertNotNull(JsonUtils.getObjectsByJsonText(response.getContentAsString(), Entity.class));
	}
	private void prepareEntity() {
	entity = Entity.Builder.creat()
	.setCenterId("TestCenterId")
	.setCenterName("TestCenterName")
	.setActiveStatus(1)
	.setAddress("TestAddress")
	.setAdminEmail("Test@test.com")
	.setAdminName("TestAdmin")
	.setFaxNumber("1234567890")
	.setPhoneNumber("1234567890")
	.setRedundantStatus(1)
	.build();
	entity.initSave("TestUser");
	}
	private void prepareEntities() {
	entities = new ArrayList<>();
	entities.add(entity);
	}
	}

view raw ControllerTest.java hosted with ❤ by GitHub

	@RunWith(SpringJUnit4ClassRunner.class)
	@ContextConfiguration(locations = {"classpath:spring-service.xml", "classpath:spring-mapper-test.xml"})
	public class FacadeTest {
	private Entity entity;
	private List<Entity> entities;
	@InjectMocks
	@Autowired
	Facade facade;
	@Mock
	Service service;
	@Before
	public void setUp() {
	MockitoAnnotations.initMocks(this);
	prepareEntity();
	prepareEntities();
	}
	@Test
	public void testFindIsActive() {
	mockServiceFindIsActive();
	Assert.assertNotNull(facade.findIsActive());
	}
	@Test
	public void testuUpdatelListAndGenXML() {
	mockServiceUpdatelListAndGenXML();
	try {
	facade.UpdatelListAndGenXML(entities);
	} catch (Exception ex) {
	ex.printStackTrace();
	Assert.assertNotNull(ex);
	}
	}
	private void mockServiceUpdatelListAndGenXML() {
	Mockito.doNothing().when(service).updateCentralList(Mockito.any());
	Mockito.doNothing().when(service).genRedundantXML(Mockito.any());
	}
	private void mockServiceFindIsActive() {
	Mockito.doReturn(entities).when(service).findIsActive();
	}
	private void prepareEntities() {
	entities = new ArrayList<>();
	entities.add(entity);
	}
	private void prepareEntity() {
	entity = Entity.Builder.creat()
	.setCenterId("TestId")
	.setCenterName("TestName")
	.setActiveStatus(1)
	.setAddress("TestAddress")
	.setAdminEmail("Test@test.com")
	.setAdminName("TestAdmin")
	.setFaxNumber("1234567890")
	.setPhoneNumber("1234567890")
	.setRedundantStatus(1)
	.build();
	entity.initSave("TestUser");
	}
	}

view raw FacadeTest.java hosted with ❤ by GitHub