Java 我如何在这里模拟最终的内部类

我正在为其编写Junits的类：

public class AImpl implements AInterface {
     public String method1(String id) throws Exception {

     String s = Service.Factory.getInstance().generate(id);
     return s;
  }
}

public interface Service {

    String generate(String var1) throws Exception;

    public static final class Factory {
        private static Service instance = null;

        public Factory() {
        }

        public static final Service getInstance() {
            if (instance == null) {
                instance = (Service)EnterpriseConfiguration.getInstance().loadImplementation(Service.class);
            }

            return instance;
        }
    }
}

要使用其内部类实例化的接口：

public class AImpl implements AInterface {
     public String method1(String id) throws Exception {

     String s = Service.Factory.getInstance().generate(id);
     return s;
  }
}

public interface Service {

    String generate(String var1) throws Exception;

    public static final class Factory {
        private static Service instance = null;

        public Factory() {
        }

        public static final Service getInstance() {
            if (instance == null) {
                instance = (Service)EnterpriseConfiguration.getInstance().loadImplementation(Service.class);
            }

            return instance;
        }
    }
}

我试过powerMockito，但它不起作用

@Test
public void generateTest() throws Exception {
   Service.Factory innerClassMock = mock(Service.Factory.class);
   String id= "id";        
   whenNew(Service.Factory.class).withArguments(anyString()).thenReturn(innerClassMock);
   whenNew(innerClassMock.getInstance().generate("hjgh")).withAnyArguments().thenReturn(id);
   id= AImpl.generate("hjgh");
   Assert.assertEquals("id", id);
}

---

如果我能很好地理解您不清晰的代码，您需要这个junit：

@RunWith(PowerMockRunner.class)
@PrepareForTest({Service.Factory.class})
public class AImplTest {

    private Service serviceMock;

    @Before
    public void setUp() {
        PowerMockito.mockStatic(Service.Factory.class);
        serviceMock = Mockito.mock(Service.class);
        PowerMockito.when(Service.Factory.getInstance()).thenReturn(serviceMock);
    }

    @Test
    public void generateTest() throws Exception {
        Mockito.doReturn("mockid").when(serviceMock).generate(Mockito.anyString());
        Assert.assertEquals("mockid", new AImpl().method1("aaa"));
    }
}

以下是我的依赖项：

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mockito/mockito-core -->
<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-core</artifactId>
    <version>2.28.2</version>
    <scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.powermock/powermock-module-junit4 -->
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>2.0.4</version>
    <scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.powermock/powermock-api-mockito2 -->
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-api-mockito2</artifactId>
    <version>2.0.4</version>
    <scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.powermock/powermock-core -->
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-core</artifactId>
    <version>2.0.4</version>
    <scope>test</scope>
</dependency>

朱尼特
朱尼特
4.12
测试
org.mockito
莫基托磁芯
2.28.2
测试
org.powermock
powermock-module-junit4
2.0.4
测试
org.powermock
powermock-api-mockito2
2.0.4
测试
org.powermock
powermock内核
2.0.4
测试

---

我已经说过我会改变你的服务。工厂类：这里你需要一个私有构造函数来正确实现单例模式。

它不工作。

是一个相当宽泛的说法。它没有告诉我们实际发生的事情与预期的一致。重构您的生产性代码以便于测试，即不要使用只有静态方法的静态内部类。使用类似于单例模式的东西，您可以在其中注入模拟实例。但是我在执行测试用例时遇到了一个错误：java.lang.NoClassDefFoundError:无法在org.mockito.internal.util.MockUtil.（MockUtil.java:21）org.mockito.internal.configuration.injection.scanner.MockScanner.（MockScanner.java:22）上初始化类org.mockito.internal.configuration.ClassPathLoader位于org.powermock.api.mockito.internal.configuration.PowerMockitoInjectingAnnotationEngine.process（PowerMockitoInjectingAnnotationEngine.java:40）的org.mockito.internal.configuration.InjectingAnnotationEngine.injectMocks（InjectingAnnotationEngine.java:96）在org.powermock.api.extension.listener.annotationEnabler上，您可以建议可能的解决方案。您确定您的依赖项相同吗？我运行代码解决方案没有任何问题…感谢Renato，我工作得非常完美。我使用了额外的依赖项mockito core..这导致了一个错误。删除它对我的测试用例有效。