建設單元測試MVC2 AsyncControllers

我正在考慮重新改寫我的一些MVC控制器是異步控制器。我有這些控制器的工作單元測試，但我想了解如何在異步控制器環境中維護它們。建設單元測試MVC2 AsyncControllers

例如，目前我有一個這樣的動作：

public ContentResult Transaction() 
{ 
    do stuff... 
    return Content("result"); 
}

和我的單元測試基本上是這樣的：

var result = controller.Transaction(); 
Assert.AreEqual("result", result.Content);

好吧，這是很容易。

但是當你的控制器的變化，看起來像這樣：

public void TransactionAsync() 
{ 
    do stuff... 
    AsyncManager.Parameters["result"] = "result"; 
} 

public ContentResult TransactionCompleted(string result) 
{ 
    return Content(result); 
}

你怎麼想你的單元測試應該建？您當然可以在您的測試方法中調用異步啓動器方法，但是如何獲取返回值？

我還沒有看到這個在谷歌什麼...

感謝您的任何想法。

來源

2010-06-03 ChrisW

與任何異步代碼一樣，單元測試需要知道線程信號。 .NET包括稱爲的AutoResetEvent類型能阻斷測試線程，直到一個異步操作已經完成：

public class MyAsyncController : Controller 
{ 
    public void TransactionAsync() 
    { 
    AsyncManager.Parameters["result"] = "result"; 
    } 

    public ContentResult TransactionCompleted(string result) 
    { 
    return Content(result); 
    } 
} 

[TestFixture] 
public class MyAsyncControllerTests 
{ 
    #region Fields 
    private AutoResetEvent trigger; 
    private MyAsyncController controller; 
    #endregion 

    #region Tests 
    [Test] 
    public void TestTransactionAsync() 
    { 
    controller = new MyAsyncController(); 
    trigger = new AutoResetEvent(false); 

    // When the async manager has finished processing an async operation, trigger our AutoResetEvent to proceed. 
    controller.AsyncManager.Finished += (sender, ev) => trigger.Set(); 

    controller.TransactionAsync(); 
    trigger.WaitOne() 

    // Continue with asserts 
    } 
    #endregion 
}

希望幫助:)

來源

2010-06-04 10:27:43

我迫不及待想在代碼中嘗試，但它看起來很棒。將它標記爲在我運行後回答。非常感謝！ – ChrisW 2010-06-04 21:36:33

我已經寫了簡化單元測試短AsyncController擴展方法位。

static class AsyncControllerExtensions 
{ 
    public static void ExecuteAsync(this AsyncController asyncController, Action actionAsync, Action actionCompleted) 
    { 
     var trigger = new AutoResetEvent(false); 
     asyncController.AsyncManager.Finished += (sender, ev) => 
     { 
      actionCompleted(); 
      trigger.Set(); 
     }; 
     actionAsync(); 
     trigger.WaitOne(); 
    } 
}

這樣，我們可以簡單地隱藏線程的「噪音」：

public class SampleAsyncController : AsyncController 
{ 
    public void SquareOfAsync(int number) 
    { 
     AsyncManager.OutstandingOperations.Increment(); 

     // here goes asynchronous operation 
     new Thread(() => 
     { 
      Thread.Sleep(100); 

      // do some async long operation like ... 
      // calculate square number 
      AsyncManager.Parameters["result"] = number * number; 

      // decrementing OutstandingOperations to value 0 
      // will execute Finished EventHandler on AsyncManager 
      AsyncManager.OutstandingOperations.Decrement(); 
     }).Start(); 
    } 

    public JsonResult SquareOfCompleted(int result) 
    { 
     return Json(result); 
    } 
} 

[TestFixture] 
public class SampleAsyncControllerTests 
{ 
    [Test] 
    public void When_calling_square_of_it_should_return_square_number_of_input() 
    { 
     var controller = new SampleAsyncController(); 
     var result = new JsonResult(); 
     const int number = 5; 

     controller.ExecuteAsync(() => controller.SquareOfAsync(number), 
           () => result = controller.SquareOfCompleted((int)controller.AsyncManager.Parameters["result"])); 

     Assert.AreEqual((int)(result.Data), number * number); 
    } 
}

如果你想知道更多，我寫了一個博客張貼有關如何Unit test ASP.NET MVC 3 asynchronous controllers using Machine.Specifications 或者，如果你要檢查這個代碼它是在github

來源

2012-09-23 11:17:53

建設單元測試MVC2 AsyncControllers

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