英文:
How to use @InjectMocks to inject dependency with same type?
问题
以下是您提供的内容的翻译部分：
我有一个名为 User 的类，其构造函数有两个相同类型的参数。
public class User {
Dependency dependency1;
Dependency dependency2;
User(Dependency dependency1, Dependency dependency2){
this.dependency1 = dependency1;
this.dependency2 = dependency2;
}
public void test(){
dependency1.print();
dependency2.print();
}
}
在我的测试中，我有两个 Spy 依赖项，我希望它们像 new User(dependency1,dependency2) 这样被注入。
@ExtendWith(MockitoExtension.class)
public class InjectMocksTest {
@InjectMocks
User user;
@Spy
Dependency dependency1 = new Dependency("dependent1");
@Spy
Dependency dependency2 = new Dependency("dependent2");
@Test
void test(){
user.test();
}
}
但我发现 User 的 dependency1 和 dependency2 都指向测试中的 dependency1，就好像它们是通过 new User(dependency1,dependency1) 进行注入的。
那么，如何使用 @InjectMocks 注解来实现我想要的效果呢？
英文:
I have a User class which has a constructor with two parameter of same type.
public class User {
Dependency dependency1;
Dependency dependency2;
User(Dependency dependency1,Dependency dependency2){
this.dependency1=dependency1;
this.dependency2=dependency2;
}
public void test(){
dependency1.print();
dependency2.print();
}
}
In my test, I have two Spy Dependency and I want them to be injected like new User(dependency1,dependency2).
@ExtendWith(MockitoExtension.class)
public class InjectMocksTest {
@InjectMocks
User user;
@Spy
Dependency dependency1=new Dependency("dependent1");
@Spy
Dependency dependency2=new Dependency("dependent2");
@Test
void test(){
user.test();
}
}
But I find that dependency1 and dependency2 of User both refers to dependency1 in the test, like they are injected with new User(dependency1,dependency1).
So how to achieve what I want with @InjectMocks annotation?
答案1
得分: 1
它似乎可以通过使用字段注入来欺骗Mockito将模拟对象注入，如果您首先创建对象本身，并将参数设置为null。这对我有效：
@ExtendWith(MockitoExtension.class)
public class UserTest {
@InjectMocks
User user = new User(null, null);
@Spy
Dependency dependency1 = new Dependency("dependent1");
@Spy
Dependency dependency2 = new Dependency("dependent2");
@Test
void test() {
user.test();
}
}
输出：
dependent1
dependent2
然而，这种行为没有记录，所以我不确定是否应该依赖它。
英文:
It appears that you can trick Mockito into injecting the mocks using Field injection if you create the object itself first, and set the arguments to null. This works for me:
@ExtendWith(MockitoExtension.class)
public class UserTest {
@InjectMocks
User user = new User(null, null);
@Spy
Dependency dependency1 = new Dependency("dependent1");
@Spy
Dependency dependency2 = new Dependency("dependent2");
@Test
void test() {
user.test();
}
}
Output:
dependent1
dependent2
However, this behavior is not documented, so I am not sure I would depend upon it.
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