java 一起使用@Spy 和@Autowired
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Using @Spy and @Autowired together
提问by Shashi K Kalia
I have a Service Class with 3 methods, Service class is also using some @Autowired annotations. Out of 3 methods, I want to mock two methods but use real method for 3rd one.
我有一个包含 3 个方法的服务类，服务类也使用了一些 @Autowired 注释。在 3 种方法中，我想模拟两种方法，但对第 3 种方法使用真实方法。
Problem is:
问题是：
- If I am using @Autowired with @Spy, all three real method implementation is being called.
- If I am using @Spy only, call to real method is return with Null pointer as there is no initialisation of Autowired objects.
- 如果我将@Autowired 与@Spy 一起使用，则会调用所有三个实际方法实现。
- 如果我只使用@Spy，则调用真正的方法会返回空指针，因为没有自动装配对象的初始化。
回答by PROrock
I know about these two options:
我知道这两个选项：
- Use @SpyBeanannotation from spring-boot-test as the only annotation
- 使用spring-boot-test 中的@SpyBean注释作为唯一的注释
@Autowired
@InjectMocks
private ProductController productController;
@SpyBean
private ProductService productServiceSpy;
- Use Java reflection to "autowire" the spy object, e.g. ReflectionTestUtils
- 使用 Java 反射来“自动装配”间谍对象，例如ReflectionTestUtils
@Autowired
private ProductController productController;
@Autowired
private ProductService productService;
@Before
public void setUp() {
ProductService productServiceSpy = Mockito.spy(productService);
ReflectionTestUtils.setField(productController, "productService", productServiceSpy);
}
回答by yuranos
I was surprised myself but it does work for us. We have plenty places like:
我自己也很惊讶，但它确实对我们有用。我们有很多地方，例如：
@Spy
@Autowired
private FeatureService featureService;
I think I know why you are facing this problem. It's not about injection, it's about when(bloMock.doSomeStuff()).thenReturn(1)vs doReturn(1).when(bloMock).doSomeStuff().
See: http://www.stevenschwenke.de/spyingWithMockito
我想我知道你为什么面临这个问题。这不是关于注入，而是关于when(bloMock.doSomeStuff()).thenReturn(1)vs doReturn(1).when(bloMock).doSomeStuff()。见：http: //www.stevenschwenke.de/spyingWithMockito
The very important difference is that?the first option will actually call the doSomeStuff()- method while the second will not. Both will cause doSomeStuff() to return the desired 1.
非常重要的区别在于？第一个选项实际上会调用 doSomeStuff()- 方法，而第二个选项则不会。两者都会导致 doSomeStuff() 返回所需的 1。
回答by Jakub Zawadzki
Using @Spytogether with @Autowiredworks until you want to verify interaction between that spy and a different component that spy is injected into. What I found to work for me was the following approach found at https://dzone.com/articles/how-to-mock-spring-bean-version-2
使用@Spy连同@Autowired作品，直到你想验证间谍和不同的组件，间谍注入之间的相互作用。我发现对我有用的是在https://dzone.com/articles/how-to-mock-spring-bean-version-2 上找到的以下方法
@Configuration
public class AddressServiceTestConfiguration {
@Bean
@Primary
public AddressService addressServiceSpy(AddressService addressService) {
return Mockito.spy(addressService);
}
}
This turns your autowired component into a spy object, which will be used by your service and can be verified in your tests.
这会将您的自动装配组件变成一个间谍对象，它将被您的服务使用并且可以在您的测试中进行验证。
