java - Mockito 中的 Spring @Value 字段注入(inject)

Question

@Service
public class MyClass {

...

  @Autowired
  public MyClass(@Value("${my.value}") String myValue)  {
      ...
  }

...
}

我的测试课:

public class MyTest {

    @Mock(name = "solrServer")
    private SolrServer solrServer;

    @InjectMocks
    private MyClass myClassMock;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    ....
}

我有一个异常(exception)，如下:

org.mockito.exceptions.base.MockitoException: Cannot instantiate @InjectMocks field named 'myClassMock' of type 'class mypackage.MyClass'. You haven't provided the instance at field declaration so I tried to construct the instance. However the constructor or the initialization block threw an exception : null

at mypackage.MyTest.setUp(MyTest.java:46) ... Caused by: java.lang.NullPointerException ...

如何从 MyTest 类注入(inject) @Value 字段并修复它？

Answer 1

您可以通过手动创建类的实例，在 @Before 带注释的方法中完成此操作，如下所示:

public class MyTest {

    @Mock(name = "solrServer")
    private SolrServer solrServer;

    @InjectMocks
    private MyClass myClassMock;

    @Before
    public void setUp() {
        myClassMock = new MyClass("value you need");
        MockitoAnnotations.initMocks(this);
    }

    @Test
    ....

}