問(wèn)題描述

在我的 Android 項(xiàng)目中，我有一個(gè)類擴(kuò)展了 處理線程:

In my Android project, I have a class extends HandlerThread:

public class MyHandlerThread extends HandlerThreads {
   private Handler mHandler;
   …
   public void doAsyncTask(MyAsyncTask task) {
        mHandler = new Handler(this.getLooper());
        mHandler.post(task);
    }
}

上述函數(shù)的參數(shù)類型MyAsyncTask是一個(gè)類擴(kuò)展Runnable:

The above function's parameter type MyAsyncTask is a class extends Runnable:

public abstract class MyAsyncTask implements Runnable {
    @Override
    public void run() {
        doTask();
    }

    public abstract void doTask();
}

我有一個(gè) MyWorker 類，它有一個(gè)函數(shù)使用 MyHandlerThread 類:

I have a MyWorker class which has a function uses MyHandlerThread class:

public class MyWorker {

  public void work() {
      MyHandlerThread handlerThread = new MyHandlerThread();
      handlerThread.start();
      handlerThread.doAsyncTask(new MyAsyncTask() {
           @Override
           doTask() {
               int responseCode = sendDataToServer();
           }
      });
  }
}

我想使用 Mockito 對(duì) 中的 work() 函數(shù)進(jìn)行單元測(cè)試MyWorker 類(例如檢查服務(wù)器 responseCode).如何在 Mockito 中做到這一點(diǎn)?

I want to use Mockito to unit test the work() function in MyWorker class (e.g. check the server responseCode). How to do it in Mockito?

推薦答案

你想測(cè)試什么?我的工人?MyHandlerThread?匿名 MyAsyncTask?一起來(lái)?可能是個(gè)壞主意，特別是如果匿名 MyAsyncTask 依賴于實(shí)際的服務(wù)器響應(yīng)(這會(huì)阻止這成為一個(gè)好的單元測(cè)試，因?yàn)槟菚r(shí)您正在測(cè)試整個(gè)系統(tǒng)).所以，我會(huì)把整個(gè)事情分成幾個(gè)部分，分別測(cè)試所有這些部分.如果您已經(jīng)這樣做了，那么您可以通過(guò)集成測(cè)試將多個(gè)部分與真實(shí)服務(wù)器一起檢查.

WHAT do you want to test? MyWorker? MyHandlerThread? the anonymous MyAsyncTask? All toegether? Probably a bad idea, especially if the anonymous MyAsyncTask relies on an actual server response (which would prevent this from being a good unit test, since you are testing a whole system then). So, I would split the whole thing into parts and test all these parts seperately. If you have done so, then you can check multiple parts toegether against a real server with an integration tests.

要測(cè)試 MyHandlerThread，你可以引入一個(gè) HandlerFactory，模擬它，從而確保處理程序被正確調(diào)用.

To test the MyHandlerThread, you could for example introduce a HandlerFactory, mock that and thus ensure that the handler was called correctly.

public class MyHandlerThread extends HandlerThreads {
   private HandlerFactory handlerFactory; // <- Add setter
   …
   public void doAsyncTask(MyAsyncTask task) {
        Handler mHandler = handlerFactory.createHandler(this.getLooper());
        mHandler.post(task);
    }
}

易于測(cè)試的單元.MyAsyncTask 簡(jiǎn)短而抽象，老實(shí)說(shuō)，我不會(huì)測(cè)試它.在那里沒(méi)有太多收獲，因?yàn)樗鼘?shí)際上并沒(méi)有多大作用.MyWorker 呢?取決于，但你可以，例如，為 MyHandlerThread 添加一個(gè) getter/setter，允許你模擬它.將您的匿名類提取到一個(gè)真實(shí)的類中可能會(huì)讓您也可以獨(dú)立于其他類來(lái)測(cè)試該類.

Easily testable unit. MyAsyncTask is short and abstract, honestly, I wouldn't test that. Not much to gain there, since it doesn't actually do much. And the MyWorker ? Depends, but you could, for example, add a getter/setter for the MyHandlerThread, allowing you to mock that. Extracting your anonymous class into a real one would probably allow you to test that one, too, independent of the others.

這篇關(guān)于在我的情況下，用戶 Mockito 對(duì)執(zhí)行異步任務(wù)的函數(shù)進(jìn)行單元測(cè)試的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！