spring-boot整合Mock进行单元测试

1.引包

<dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

</dependency>

<dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <scope>test</scope>

 </dependency>

2.上代码  

BeanTest.java

@RunWith(SpringJUnit4ClassRunner.class)  

@SpringApplicationConfiguration(classes = TestApplication.class) //使用TestApplication作为spring容器加载类

@ActiveProfiles("test")   //这边test指配置文件指向spring-test.yml

@Rollback(false) //单元测试配置数据库默认会事务会退  此时强制事务提交

public class BeanTest {

@Mock

protected IdentityFactory factory;

@InjectMocks

@Autowired

private IdGenerator idGenerator;

@Before

public void mockIdentityFactory() {

    Mockito.when(factory.next(Mockito.anyString())).thenAnswer(new Answer<Long>() {

         @Override

         public Long answer(InvocationOnMock invocationOnMock) throws Throwable {

              Random random = new Random();

              return (long) random.nextInt(1000);

         }

   });

}

@Test

public void test(){

     idGenerator.getId();

}

}

@SpringBootApplication

public class TestApplication {

      public static void main(String[] args) {

           SpringApplication.run(TestApplication.class, args);

      }

}

上面这个例子IdGenerator就注入了IdentityFactory的实例，当执行到方法到actory.next会产生一个随机值

注意：

Mock在运行时匹配注入的一个条件是class匹配(class相同或者是其子类)  

当Mock的类是一个接口；在spring ioc加载bean 对于接口默认产生动态代理的方式，此时会导致条件匹配失败；此时更改默认使用cglib方式加载bean即可.