在 class 中侦测父 class 的方法,并使用 Mockito 注入模拟

Spy a method from parent class in a class with injected mocks with Mockito

我在 Java 项目中使用 Mockito Spring 和 Struts,我在测试操作时遇到问题。

我没有使用 Struts2 jUnit 插件来节省使用这种方法进行测试的时间:Strut 2.3.1.2 Unit test, how to remove Spring codependency vs NPE with getContext()

问题是在我的操作中,当调用 getText() 时我遇到了 NullPointerException。

我正在尝试侦测此方法,它继承自 ActionSupport,但我找不到方法,因为该操作使用 InjectMocks[= 注释48=]在测试中。

这是 类 的一个简单示例:

家长:

public class ActionSupport {
    public String getText(String  aTextName){
        return this.getTextProvider().getText(aTextName);
    }
}

我的操作:

public class MyAction extends ActionSupport {
    @Autowired private IMyService myService;

    public String execute(){
        getText("SomeText");
        myService.something();
        return SUCCESS;
    }
}

测试:

@RunWith(MockitoJUnitRunner.class)
public class MyClassTest {
    @Mock private IMyService myService;
    @InjectMocks private MyAction myAction;

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

    @Test
    public void test() {
        myAction.execute();
    }
}

我遇到了这个异常:

java.lang.NullPointerException
    at com.opensymphony.xwork2.util.TextParseUtil.translateVariables(TextParseUtil.java:167)
    at com.opensymphony.xwork2.util.TextParseUtil.translateVariables(TextParseUtil.java:126)
    at com.opensymphony.xwork2.util.TextParseUtil.translateVariables(TextParseUtil.java:48)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.getDefaultMessage(LocalizedTextUtil.java:663)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:534)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:362)
    at com.opensymphony.xwork2.TextProviderSupport.getText(TextProviderSupport.java:208)
    at com.opensymphony.xwork2.TextProviderSupport.getText(TextProviderSupport.java:123)
    at com.opensymphony.xwork2.ActionSupport.getText(ActionSupport.java:103)
    at es.MyAction.execute(MyAction.java:148)

如果我用 @Spy 注释 MyAction 维护 @InjectMocks 我有WhosebugError.

我怎样才能只监视 ActionSupport.getText() 并让 mockito 对我的操作注入模拟?

我会避免使用 @InjectMocks,因为它会自动失败。

只需向您的 MyAction 添加一个构造函数,仍然使用 @Autowired 即构造函数注入。这也有助于保证所需的依赖性。

您不需要 initMocksMockitoJUnitRunner

public class MyAction extends ActionSupport {

    private IMyService myService;

    @Autowired
    public MyAction(MyService myService) {
        this.myService = myService;
    }

    public String execute(){
        getText("SomeText");
        myService.something();
        return SUCCESS;
    }
}

@RunWith(MockitoJUnitRunner.class)
public class MyClassTest {

    @Mock
    private IMyService myService;

    private MyAction myAction;

    @Before
    public void setup() {
        myAction = spy(new MyAction(myService));
    }

    @Test
    public void test() {

        assertThat(myAction.execute(), equalTo(Action.SUCCESS));

        verify(myAction, times(1)).getText();

        verify(myService, times(1)).something();
    }
}

InjectMocks fails silently

Constructor injection discussion