Selenium C# ITakesScreenshot 在尝试在 catch 块中截屏时超时

Question

我在尝试在测试失败时截屏时遇到问题。尝试在失败情况下截屏时出现超时错误。它在 try 块中工作正常，但在 catch 块中超时。任何帮助将不胜感激。

截图方法如下：

 public class Logging
        {
           public static void ErrorScreenshot()
            {
                //Take the screenshot
                Screenshot ssh = ((ITakesScreenshot)Driver.BrowserInstance).GetScreenshot();
                //Save the screenshot
                 ssh.SaveAsFile("C:/Users/", ScreenshotImageFormat.Png);
             } 
          }

这是我的测试方法

    public static bool FindElement
    {
      get
      {
          try
          {
             var element = Driver.BrowserInstance.FindElement(By.XPath("  "));
             if (element != null)
             {
               return true;
             }
          }
          catch (Exception ex)
          {
             Logging.ErrorScreenshot();
             Logging.Error("Not able to find element" + ex.ToString());
          }
          return false;
     }

  }

当它找不到元素时，它会去 catch 块，并且 Logging.ErrorScreenshot 方法会抛出一个超时异常。

Error details:
OpenQA.Selenium.WebDriverException
  HResult=0x80131500
  Message=The HTTP request to the remote WebDriver server for URL http://localhost:55418/session/f3dbde1645dd91e453c5823d72199ea9/screenshot timed out after 60 seconds.
  Source=WebDriver
  StackTrace:
   at OpenQA.Selenium.Remote.HttpCommandExecutor.MakeHttpRequest(HttpRequestInfo requestInfo)
   at OpenQA.Selenium.Remote.HttpCommandExecutor.Execute(Command commandToExecute)
   at OpenQA.Selenium.Remote.DriverServiceCommandExecutor.Execute(Command commandToExecute)
   at OpenQA.Selenium.Remote.RemoteWebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)
   at OpenQA.Selenium.Remote.RemoteWebDriver.GetScreenshot()
   at AvbLinqAutoFramework.Logging.ErrorScreenshot() in C:\Users\Logging.cs:line 66
   at DashboardPage.get_Verifylogin() in C:\Users\DasboardPage.cs:line 65
   at Tests() in C:\Users\SmokeTests\Tests.cs:line 33

Inner Exception 1:
WebException: The operation has timed out

Answer 1

通过使用不同的选择器 (CssSelector) 和 WebDrverWait 解决了这个问题。最初的异常是超时，而无法使用 XPath 找到元素。

public static bool FindElement
        {
            get
            {
                try
                {
       WebDriverWait wait = new WebDriverWait(Driver.BrowserInstance, TimeSpan.FromSeconds(10));
var inputspcmodel = wait.Until(SeleniumExtras.WaitHelpers.ExpectedConditions.ElementToBeClickable(By.CssSelector($"div[id ='modelSearch-container'] div[class='k-widget k-multiselect k-multiselect-clearable'] div input")));
inputspcmodel.Click();
return true;
}
catch (Exception ex)
                {
                    Logging.Error("Not able to find element " + ex.ToString());
                    Logging.ErrorScreenshot();
                }
                return false;
            }

        }