java - 如何使用 Spring Boot 注入(inject)模拟？

Question

我想将模拟注入(inject)到我的 Springboot 应用程序中。我收到此错误:

Error creating bean with name 'ca.company.TestA': Unsatisfied dependency expressed through field 'a'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'ca.company.hello.A' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

我被困住了，不明白如何处理。我将 A 定义为 Autowiring 。有什么问题吗？

这是我的测试文件:

@RunWith(SpringJUnit4ClassRunner.class)
public class TestA {

    @Autowired
    private A a;

    private B Bmock;

    @Before
    public void before() {
        Bmock = Mockito.mock(B.class);
        ReflectionTestUtils.setField(a, "b", Bmock);
    }

    @Test
    public void testSpeak() {
        when(Bmock.writeToScreen()).thenReturn("Everything will be alright");
        assert(true);
    }
}

这是配置文件:

@Configuration
public class Config {

    @Bean
    public B b() {
        return new B();
    }

    // The error persists whether I define this bean or not
    @Bean
    public A a() {
        return new A();
    }

}

这是有问题的类:

@Component
public class A {
    @Autowired
    private B b;



    public void speak() {
        System.out.println(b.writeToScreen());
    }
}

最后这是我的文件结构:

我做错了什么，我不明白。

Answer 1

Spring 不处理您的配置类。实现这一目标的最简单方法是将 @ContextConfiguration(classes = Config.class) 放入测试类中。