java 单元测试：定义模拟行为后调用@PostConstruct
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Unit testing: Call @PostConstruct after defining mocked behaviour
提问by dwjohnston
I have two classes:
我有两个班级：
public MyService {
@Autowired
private MyDao myDao;
private List<Items> list;
@PostConstruct
private void init(){
list = myDao.getItems();
}
}
Now I'm wanting to involve MyServicein a unit test, and so I'll mock the behaviour MyDao.
现在我想参与MyService单元测试，所以我将模拟行为MyDao。
XML:
XML：
<bean class = "com.package.MyService">
<bean class="org.mockito.Mockito" factory-method="mock">
<constructor-arg value="com.package.MyDao"/>
</bean>
<util:list id="responseItems" value-type="com.package.Item">
<ref bean="item1"/>
<ref bean="item2"/>
</util:list>
Unit Test:
单元测试：
@ContextConfiguration("/test-context.xml")
@RunWith(SpringJUnit4ClassRunner.class)
public class MyServiceTest {
@Autowired
MyService myService
@Autowired
MyDao myDao;
@Resource
@Qualifier("responseItems")
private List<Item> responseItems;
@Before
public void setupTests() {
reset(myDao);
when(myDao.getItems()).thenReturn(responseItems);
}
}
The problem with this is that the MyServicebean is created, and its @PostConstruct bean called before the mocked behaviour is defined.
这样做的问题MyService是创建了bean，并且在定义模拟行为之前调用了它的 @PostConstruct bean。
How can I either define the mocked behaviour in the XML or delay @PostConstructuntil after the unit test setup?
如何在 XML 中定义模拟行为或延迟@PostConstruct到单元测试设置之后？
回答by SS02
I have same kind of requirement in my project. where i need to set a string using @PostConstructor and I did not want to ran spring context or in other words I want simple mock. My requirement was follow:
我在我的项目中有同样的要求。我需要使用 @PostConstructor 设置一个字符串，但我不想运行 spring 上下文，或者换句话说，我想要简单的模拟。我的要求如下：
public class MyService {
@Autowired
private SomeBean bean;
private String status;
@PostConstruct
private void init() {
status = someBean.getStatus();
}
}
}
Solution:
解决方案：
public class MyServiceTest(){
@InjectMocks
private MyService target;
@Mock
private SomeBean mockBean;
@Before
public void setUp() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
MockitoAnnotations.initMocks(this);
when(mockBean.getStatus()).thenReturn("http://test");
//call post-constructor
Method postConstruct = MyService.class.getDeclaredMethod("init",null); // methodName,parameters
postConstruct.setAccessible(true);
postConstruct.invoke(target);
}
}
回答by UserF40
MyDao sounds like it is an abstraction of an external system. Generally external systems shouldn't be called in @PostConstructmethods. Instead have your getItems()called by another method in MyService.
MyDao 听起来像是对外部系统的抽象。通常不应在@PostConstruct方法中调用外部系统。而是让您getItems()在MyService.
Mockito injections will take place after the Spring initiation at which point the mock isn't working as you see. You cannot delay the @PostConstruct. To beat this and have the load run automatically have MyServiceimplement SmartLifecycleand call getItems()in start().
Mockito 注入将在 Spring 启动之后进行，此时模拟无法如您所见。您不能延迟@PostConstruct. 要打败这个和有负荷运行自动拥有MyService执行SmartLifecycle和呼叫getItems()在start()。
