Junit Mockito实现单元测试方法介绍

@SpringBootTest
@RunWith(SpringRunner.class)
public class UnitTest1 {
    @Autowired
    private UnitService unitService;
    @Test
    public void test() {
        System.out.println("----------------------");
        System.out.println(unitService.sayHello());
        System.out.println("----------------------");
    }
}

public class UnitTest2 {
    @Test
    public void test() {
        String sayHello = "Hello World";
        Assert.assertEquals("Hello World", sayHello);
    }
}

public class UnitTest3 {
    // 触发创建带有 @Mock 注解的对象
    @Rule public MockitoRule mockitoRule = MockitoJUnit.rule();
    // 1. 使用 @Mock 注解创建 mock 对象
    @Mock private UnitDao unitDao;
    @Test
    public void test() {
        // 2. 使用静态 mock() 方法创建 mock 对象
        Iterator iterator = mock(Iterator.class);
        // when...thenReturn / doReturn...when 模拟依赖调用
        when(iterator.next()).thenReturn("hello");
        doReturn(1).when(unitDao).delete(anyLong());
        // 断言
        Assert.assertEquals("hello", iterator.next());
        Assert.assertEquals(new Integer(1), unitDao.delete(1L));
    }
}

@Service
public class UnitServiceImpl implements UnitService {
    @Autowired
    private UnitDao unitDao;
    @Override
    public String sayHello() {
        Integer delete = unitDao.delete(1L);
        System.out.println(delete);
        return "hello unit";
    }
}

@RunWith(MockitoJUnitRunner.class)
public class UnitTest2 {
    @Mock
    private UnitDao unitDao;
    @InjectMocks
    private UnitServiceImpl unitService;
    @Test
    public void unitTest() {
        // mock 调用
        when(unitDao.delete(anyLong())).thenReturn(1);
        Assert.assertEquals("hello unit", unitService.sayHello());
    }
}

        <!-- PowerMock -->
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-module-junit4</artifactId>
            <version>2.0.7</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-api-mockito2</artifactId>
            <version>2.0.7</version>
        </dependency>

@RunWith(PowerMockRunner.class)
@PrepareForTest({StringUtils.class})
public class UnitTest4 {
    @Test
    public void test() {
        mockStatic(StringUtils.class);
        when(StringUtils.getFilename(anyString())).thenReturn("localhost");
        Assert.assertEquals("localhost", StringUtils.getFilename(""));
    }
}