PowerMock结合SpringJUnit4ClassRunner解决UT中静态依赖问题

依赖

<dependencies>
        <!-- https://mvnrepository.com/artifact/org.powermock/powermock-module-junit4 -->
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-module-junit4</artifactId>
            <version>1.7.4</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.powermock/powermock-api-mockito -->
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-api-mockito</artifactId>
            <version>1.7.4</version>
            <scope>test</scope>
        </dependency>

</dependencies>

接口

public interface AddressService {
    String getAddress(Long id);
}

public interface StudentService {
    String getAge(Long id);
}

@Service
public class AddressServiceImpl implements AddressService {
    @Override
    public String getAddress(Long id) {
        return "河南省";
    }
}

@Service
public class StudentServiceImpl implements StudentService {

    @Autowired
    private AddressService addressService;

    @Override
    public String getAge(Long id) {
        return id + addressService.getAddress(id) + ConfigUtil.getPath();
    }
}

静态类

public class ConfigUtil {

    public static String getPath() {
        return "path";
    }
}

单元测试

方法一：

@ContextConfiguration(locations = {"classpath:applicationContext-mock.xml"})
@RunWith(PowerMockRunner.class)
@PowerMockRunnerDelegate(SpringJUnit4ClassRunner.class)
@PrepareForTest({ConfigUtil.class})
public class StudentServiceTest1 {

    @Autowired
    private StudentService studentService;

    @Test
    public void test() {
        MockitoAnnotations.initMocks(this);

        AddressService addressService = PowerMockito.mock(AddressService.class);
        ReflectionTestUtils.setField(studentService, "addressService", addressService);
        PowerMockito.when(addressService.getAddress(1L)).thenReturn("mock");

        // 模拟静态方法
        PowerMockito.mockStatic(ConfigUtil.class);
        PowerMockito.when(ConfigUtil.getPath()).thenReturn("staticMock");

        String result = studentService.getAge(1L);
        System.out.println(result);
    }
}

// 输出：1mockstaticMock

方法二

@ContextConfiguration(locations = {"classpath:applicationContext-mock.xml"})
@RunWith(PowerMockRunner.class)
@PowerMockRunnerDelegate(SpringJUnit4ClassRunner.class)
@PrepareForTest({ConfigUtil.class})
public class StudentServiceTest2 {

    @Autowired
    private StudentService studentService;

    @Mock
    private AddressService addressService;

    @Test
    public void test() {
        MockitoAnnotations.initMocks(this);

        ReflectionTestUtils.setField(studentService, "addressService", addressService);
        Mockito.when(addressService.getAddress(1L)).thenReturn("mock");

        // 模拟静态方法
        PowerMockito.mockStatic(ConfigUtil.class);
        PowerMockito.when(ConfigUtil.getPath()).thenReturn("staticMock");

        String result = studentService.getAge(1L);
        System.out.println(result);
    }
}

// 输出：1mockstaticMock