使用 Mockito 模拟两个相同类型的对象 [英] Mocking two objects of the same type with Mockito

问题描述

我正在使用 Mockito 编写单元测试，但在模拟注入的类时遇到问题.问题是两个注入的类是相同的类型，并且仅通过它们的 @Qualifier 注释来区分.如果我尝试简单地模拟 SomeClass.class，则不会注入该模拟，并且该对象在我的测试中为 null.我怎样才能模拟这些对象?

I'm writing unit tests using Mockito and I'm having problems mocking the injected classes. The problem is that two of the injected classes are the same type, and only differentiated by their @Qualifier annotation. If I tried to simply mock SomeClass.class, that mock is not injected and that object is null in my tests. How can I mock these objects?

public class ProfileDAL {

    @Inject
    @Qualifier("qualifierA")
    private SomeClass someClassA ;

    @Inject
    @Qualifier("qualifierB")
    private SomeClass someClassB ;

    //...various code, not important
}

@RunWith(MockitoJUnitRunner.class)
public class ProfileDALLOMImplTest {

    @InjectMocks
    private ProfileDALLOMImpl profileDALLOMImpl = new ProfileDALLOMImpl();

    @Mock
    private SomeClass someClassA;
    @Mock
    private SomeClass someClassB;

    private SomeResult mockSomeResult = mock(SomeResult.class);

    @Test
    public void testSomeMethod() {
        when(someClassA .getSomething(any(SomeArgment.class)).thenReturn(mockSomeResult);
        Int result = profileDALLOMImpl.someTest(This isn't relevant);
    }

 }

推荐答案

我曾尝试使用 JUnit 在 Mockito 1.9.5 中模拟两个具有相同类型的对象，它可以工作.

I have tried mocking two objects with the same type with Mockito 1.9.5 using JUnit and it works.

参见:http:///static.javadoc.io/org.mockito/mockito-core/1.9.5/org/mockito/InjectMocks.html

文档中的相关类型信息:

Relevant type info from the doc:

"字段注入；mocks会先按类型解析，如果有多个属性相同类型，则通过字段名和mock名匹配."

"Field injection; mocks will first be resolved by type, then, if there is several property of the same type, by the match of the field name and the mock name."

这似乎是说，当您有两个相同类型时，您应该使模拟名称与所有模拟的字段名称匹配:

And this one which seems to say you should make the mock name match the field name for all your mocks when you have two of the same type:

"注意1:如果你有相同类型(或相同擦除)的字段，最好用匹配的字段命名所有@Mock注释的字段，否则Mockito可能会混淆并且注入获胜不会发生."

"Note 1: If you have fields with the same type (or same erasure), it's better to name all @Mock annotated fields with the matching fields, otherwise Mockito might get confused and injection won't happen."

也许是后者在咬你?

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