截图

Question

我在试着拍一张考试失败的截图。

    [TearDown]
    public void TearDown()
    {
        var status = TestContext.CurrentContext.Result.Outcome.Status;
        var stackTrace = "<pre>" + TestContext.CurrentContext.Result.Message + "</pre>";
        var errorMessage = TestContext.CurrentContext.Result.Message;
        if (status == NUnit.Framework.Interfaces.TestStatus.Failed)
        {
            test.Log(LogStatus.Fail, status + errorMessage);
            var ScreenShotPath = GetScreenShot.Capture(_webdriverChrome);
            test.Log(LogStatus.Fail, "Screen Shot Below: "+test.AddScreenCapture(ScreenShotPath));
        }
        else if (status == NUnit.Framework.Interfaces.TestStatus.Passed)
        {
            test.Log(LogStatus.Pass, status + errorMessage);
        }
        extent.EndTest(test);
        _webdriverChrome.Quit();}

捕获功能是

 public static string Capture(IWebDriver Webdrievr)
    {
        string pth = System.Reflection.Assembly.GetCallingAssembly().CodeBase;
        string actualPath = pth.Substring(0, pth.LastIndexOf("bin"));
        string projectPath = new Uri(actualPath).LocalPath;

        Screenshot ss = ((ITakesScreenshot)Webdrievr).GetScreenshot();
        string screenshot = ss.AsBase64EncodedString;
        byte[] screenshotAsByteArray = ss.AsByteArray;
        ss.SaveAsFile(projectPath + "ErrorReportScreenshot\\ErrorScreenshot.jpeg", ScreenshotImageFormat.Jpeg); //use any of the built in image formating
        string _fullPathToReturn = projectPath + "ErrorReportScreenshot";
        return _fullPathToReturn;
    }

我搞错了

结果信息： OpenQA.Selenium.WebDriverException :60秒后向远程WebDriver服务器请求URL http://localhost:56184/session/1aaf976356898c52e5cd57d17d44df15/element超时。-> System.Net.WebException :操作超时了，TearDown : OpenQA.Selenium.WebDriverException :对远程WebDriver服务器的http://localhost:56184/session/1aaf976356898c52e5cd57d17d44df15/screenshot请求在60秒后超时。-> System.Net.WebException :操作超时了

问题是，只要我从capture()调用TearDown()方法，屏幕截图就会失败。如果我只是在一个新的测试中运行它来调用capture()，那么它的工作原理就像一种魅力。在调试模式中，我可以看到它在这一行上失败：Screenshot ss = ((ITakesScreenshot)Webdrievr).GetScreenshot();，我缺少了什么？

编辑:我观看了((ITakesScreenshot)Webdrievr)并得到了一个错误：

错误CS0103:名称'Webdrievr‘在当前上下文中不存在

呼叫堆栈：

>   Assign_Represnt.dll!Assign_Represnt.GetScreenShot.Capture(OpenQA.Selenium.IWebDriver Webdrievr) Line 22 C#

Answer 1

我发现了问题。由于某些原因，以下原因导致了所有这些

var options = new ChromeOptions();
options.AddArgument("no-sandbox");
_webdriverChrome = new ChromeDriver(options);

我只是使用色度驱动器没有选择，它现在起作用了。

_webdriverChrome = new ChromeDriver();

Answer 2

我有类似的问题，同时试图采取屏幕截图测试失败。当我尝试在失败的情况下拍摄屏幕截图时，会出现超时错误。它在try块中运行良好，但在catch块中超时。我不使用Chrome选项作为上述解决方案。任何帮助都将不胜感激。

下面是截图的方法：

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，它会去捕捉块，在那里，Logging.ErrorScreenshot方法会抛出一个超时异常。

Error details below:

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 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