c# - 有没有办法将任何函数调用一般地包装在 try/catch block 中？

Question

我正在为一个项目编写一堆集成测试。我想调用包含在 try/catch block 中的每个单独的集成点方法，这样当它失败时，我会得到某种反馈来显示，而不仅仅是让应用程序崩溃。我还希望能够计算调用时间，并在需要时检查返回值。因此，我有一个 IntegrationResult 类，其中包含一些基本描述、结果和耗时属性:

class IntegrationResult
{
  private StopWatch _watch;

  public string Description {get;set;}

  public string ResultMessage {get;set;}

  public bool TestPassed {get;set;}

  public string TimeElapsed {get { return _watch == null ? "0" : _watch.Elapsed.TotalMilliseconds.ToString(); } }

  public void Start()
  {
    _watch = StopWatch.StartNew();
  }  

  public void Stop()
  {
    _watch.Stop();
  }
}

我一直在写的代码是这样的:

IntegrationResult result = new IntegrationResult();
result.Description = "T-SQL returns expected results";

    try
    {
      result.Start();
      SomeIntegrationPoint("potential arguments"); //This is the line being tested
      result.Stop();

      //do some check that correct data is present

      result.TestPassed = true;
      result.ResultMessage = "Pulled 10 correct rows";
    }
    catch(Exception e)
    {

      result.TestPassed = false;
      result.ResultMessage = String.Format("Error: {0}", e.Message);
    }

我真的很想能够将 SomeIntegrationPoint 方法作为参数和委托(delegate)或其他东西传递进来以检查结果，但我不知道这是否可能。是否有任何框架可以处理此类测试，或者您对我如何简化代码以更好地重用有什么建议吗？我厌倦了输入这个 block ；)

Answer 1

(我假设这是 C#，如标记的那样......虽然语法不在问题中。)

你可以做到这一点。只需将结果类更改为包括:

class IntegrationResult
{
      string Description { get; set; }
      string SuccessResultMessage { get; set; }
      string FailResultMessage { get; set; }

      public IntegrationResult(string desc, string success, string fail)
      {
          this.Description = desc;
          this.SuccessResultMessage = success;
          this.FailResultMessage = fail;
      }

      public bool ExecuteTest(Func<IntegrationResult, bool> test)
      {
          bool success = true;
          try
          {
              this.Start();
              success = test(this);
              this.Stop();
              this.ResultMessage = success ? 
                                      this.SuccessResultMessage : 
                                      this.FailResultMessage;
              this.TestPassed = true;
          }
          catch(Exception e)
          {
               this.TestPassed = false;
               this.ResultMessage = String.Format("Error: {0}", e.Message);
               success = false;
          }
          return success;
      }
       ...

然后您可以将测试代码更改为:

private void myDoTestMethod(string argumentOne, string argumentTwo)
{
    IntegrationResult result = new IntegrationResult(
                                   "T-SQL returns expected results", 
                                   "Pulled 10 correct rows",
                                   "Wrong number of rows received");
    result.Execute( r=>
    {
         integrationPoint.call(argumentOne, argumentTwo);
         //do some check that correct data is present (return false if not)
         return true;
    });
 }

这可以很容易地扩展到包括您的时间安排。