Strut 2.3.1.2单元测试，如何使用getContext()删除Spring依赖与NPE [英] Strut 2.3.1.2 Unit test, how to remove Spring codependency vs NPE with getContext()

问题描述

我刚刚升级到Struts 2.3.1.2，并且JUnit测试遇到了一些问题.

I'm just upgrading to Struts 2.3.1.2, and having a few issues with JUnit tests.

我的旧测试代码是这样的....

My old test code was like this....

public class HomeActionTest  {

    @Test
    public void testUserNameErrorMessage() throws Exception {
     HomeAction action = new HomeAction();
     setupMocks(action);
     action.execute();
    }
}

动作类的execute方法具有代码

The action class's execute method has the code

    String text = getText(GLOBAL_SELECT);

这会在LocalizedTextUtil中导致NullPointerExeception，因为它会调用...

This causes a NullPointerExeception though in LocalizedTextUtil since it calls...

   ActionContext.getContext()

现在我可以尝试执行此操作...

Now I could try and do this...

  ActionContext.setContext(new ActionContext(new HashMap()));

但是然后我将得到一个NullPointerException，因为上下文中的Valuestack为null. 我可以继续尝试解决这些问题，但这似乎是徒劳的. 必须有更好的方法吗?！?

But then I'll get a NullPointerException since the Valuestack from the context is null. I could go on and on trying to fix these problems, but it seems like a futile task. There must be a better way?!?

好吧...

我遵循新的 Struts 2.3.xx测试文档

我的struts.xml与spring相连.

My struts.xml is wired with spring.

 <action name="secure/home" class="homeAction" method="execute">
            <result>home.jsp</result>
            <result name="input">home.jsp</result>
        <result name="error">error.jsp</result>
 </action>

我的测试班

public class HomeActionTest extends StrutsSpringTestCase   {

    @Test
    public void testUserNameErrorMessage() throws Exception {
        ActionProxy proxy = getActionProxy("/secure/home");

        // setup the session
        Map<String, Object> session = new HashMap<String, Object>();  
        ActionContext actionContext = proxy.getInvocation().getInvocationContext();  
        actionContext.setSession(session);  

        HomeAction homeAction = (HomeAction) proxy.getAction();

        proxy.execute();
    }
}

但这现在意味着我得到了一个完全填充的Spring注入Action类！ 大多数人会说是的！！！"此时.

But this now means I get a fully populated Spring injected Action class! Most people would saying "YEA!!!" at this point.

我的问题是，这不是UNIT测试类，它现在一直进行到数据库层的调用，因为这是其在运行时的连接方式.

My problem is that this isn't a UNIT test class, its now making calls all the way down to the DB layer since that's how its wired for run-time.

所以这是我的问题，我知道我花了一段时间才能理解它，是否有可能获得一个可以访问所需资源的Action类(用于诸如getText()之类的方法调用) ，但不是所有的Spring都连接好了吗?

So here is my question, I know I've taken a while to get to it, is it possible to get an Action class that has access to resources it needs (for method calls such as getText()), but is not all Spring wired up?

就目前而言，我很想去重新删除所有与setServicexxxx匹配的方法，至少然后我会在运行测试时得到NullPointerException，并且可以模拟该服务，但这仅仅是错误的.我希望我的测试是快速的，而不是花2秒来启动Spring上下文.

For the moment I'm tempted to go the refection route to remove all methods that match setServicexxxx on my action, at least then I'd get a NullPointerException on running the test and I can mock out that service, but that's just wrong. I want my tests to be FAST, not spend 2 seconds starting up the Spring context.

Struts2.3如何以不符合单元测试口号的基础测试类结束?

How did Struts2.3 end up with a Base test class that doesn't follow the mantra of what a Unit test is?

在Struts 2.0.9(xwork-2.0.3.jar)中一切正常.

This was all fine in Struts 2.0.9 (xwork-2.0.3.jar).

我想念什么?

推荐答案

您确实应该尽可能快地进行单元测试(否则，没有TDD).因此，您应该进行最小的Struts设置:(我正在使用Mockito，并且此代码位于静态块中，完整代码位于

You should indeed keep your unit test as fast as possible (otherwise, no TDD). So you should do the minimum struts setup: (I'm using mockito and I have this code in a static block, full code in this gist)

ActionContext actionContext = mock(ActionContext.class);
ServletContext servletContext = mock(ServletContext.class);
when(actionContext.getLocale()).thenReturn(Locale.FRENCH);
ValueStack valueStack = mock(ValueStack.class);
Map<String, Object> context = new HashMap<String,Object>();
Container container = mock(Container.class);
XWorkConverter conv = mock(XWorkConverter.class);
when(container.getInstance(XWorkConverter.class)).thenReturn(conv);
when(conv.convertValue(any(Map.class), any(Object.class), any(Class.class))).thenAnswer(new Answer<Object>() {
    public Object answer(InvocationOnMock invocation) throws Throwable {
        log.info(invocation.getArguments()[1].toString());
        return "VALUE";
    }

});
context.put(ActionContext.CONTAINER, container);
when(valueStack.getContext()).thenReturn(context);
when(actionContext.getValueStack()).thenReturn(valueStack);
ServletActionContext.setContext(actionContext);
ServletActionContext.setServletContext(servletContext);

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