Question

我有一个函数可以调用每个对象的测试。如果当前测试失败，我希望能够重新测试。

        foreach (TestObject test in Tests)
        {
              test.RunTest()
        }
        //This is in the TestObject class
        RunTest()
        {
             if (failure)
             {
                 //Want to be able to run RunTest() again without interrupting the foreach loop.
             }
        }

Answer 1

你们这些代码太多了......

for (var tryCount = 0; tryCount < 3; tryCount++)
    if (test.RunTest())
        break;

...哦，我想到了一个更短的版本...但它不是那么干净......

for (var tryCount = 0; !test.RunTest() && tryCount < 3; tryCount++);

如果你想重复使用，那就像这样...

static bool RunTest(Func<bool> testCase, int maxRetry)
{
    for (var tryCount = 0; tryCount < maxRetry; tryCount++)
        if (testCase())
            return true;
    return false;
}

// usage
var testResult = RunTest(test.RunTest, 3);

// or even...
var testResult = RunTest(
    {
        try {
            return test.RunTest();
        } catch (Exception ex) {
            Debug.WriteLine(ex);
            return false;
        }
    }, 3);

Answer 2

对于上面的两个答案，解决方案将导致RunTest（）永远运行，如果失败是合法的（即不是瞬态故障，我只能猜测你正在打什么）。您可以考虑执行上述其中一个循环，而是计算一旦达到该阈值就会失败多少次并挽救。类似的东西：

int FailureThreshold = 3;
foreach (TestObject test in Tests) 
{
    int failCount = 0;

    while (failCount < FailureThreshold)
    {
        if (test.RunTest())
        {
            break;
        }
        else
        {
            failCount++;
        }
    }
}

您还应该考虑保留循环以便传递多少次的统计信息。这可能是测试稳定性的一个很好的指标。

Answer 3

有几种方法可以实现这一目标，具体取决于您为什么要这样做。你可以：

1）让RunTest()返回boolean表示成功或失败，然后：

foreach (TestObject test in Tests)
{
    while(!test.runTest(){}
}

2）使用while内的RunTest()：

RunTest()
{
  while(true)
  {
    ...test stuff...

    if(failure)
      continue;
    else
      break;
  }
}

Answer 4

foreach (TestObject test in Tests)
{
      test.RunTest()
}
//This is in the TestObject class
RunTest()
{
     //set it to failure or set variable to failure
     while (failure)
     {
         //do the test
         //if using variable set it to failure if it failed, success if it succeeded 
         //will keeping going through the while statement until it succeeds or you cut it off another way
     }
     // has succeeded
}

重启正在运行的功能

4 个答案: