c# - SpecFlow AfterScenario 每次执行场景总数

Question

我创建了一个基类，用于在 C# 中截取失败测试用例的屏幕截图。我将 specflow 与 MSTest 一起用于自动化测试。但是，问题是当场景失败时，系统会运行下面的 AfterScenario 方法来计算场景总数。例如，我当前的项目中有 40 个场景，假设场景#1 正在运行，在场景#1 执行后 AfterScenario 方法将调用，但它调用 40 次，每次场景。

基类代码

[Binding]
public abstract class TakeScreenshot : Steps
{
    [AfterScenario]
    public void AfterWebTest()
    {
        if (ScenarioContext.Current["run"]=="0")
        {

            if (ScenarioContext.Current.TestError != null)
            {
                TakeScenarioScreenshot(Tools.driver);
            }
            ScenarioContext.Current["run"] = "1";
        }
    }

    private void TakeScenarioScreenshot(IWebDriver driver)
    {
        try
        {            
            string fileNameBase = string.Format("{0}_{1}",
            DateTime.Now.ToString("yyMMddHHmmssFFF") , ScenarioContext.Current.ScenarioInfo.Title);

            var artifactDirectory = Path.Combine(Directory.GetCurrentDirectory(), "testresults");
            if (!Directory.Exists(artifactDirectory))
                Directory.CreateDirectory(artifactDirectory);

            string pageSource = driver.PageSource;
            string sourceFilePath = Path.Combine(artifactDirectory, fileNameBase + "_source.html");
            File.WriteAllText(sourceFilePath, pageSource, Encoding.UTF8);
            ITakesScreenshot takesScreenshot = driver as ITakesScreenshot;

            if (takesScreenshot != null)
            {
                var screenshot = takesScreenshot.GetScreenshot();
                string screenshotFilePath = Path.Combine(artifactDirectory, fileNameBase + "_screenshot.png");
                screenshot.SaveAsFile(screenshotFilePath, ImageFormat.Png);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error while taking screenshot: {0}", ex);
        }
    }
}

这是我继承TakeScreenshot类

的测试类

[Binding]
public class CheckTwoNumberAreEqual : TakeScreenshot
{

    [Given(@"Check two numbers are same")]
    public void GivenChecktwonumbersaresame()
    {
        Assert.AreEqual(2, 3);
    }
}


[Binding]
public class TestAddNewUser : TakeScreenshot
{

    [Given(@"Add two numbers and check answer")]
    public void GivenAddtwonumbersandcheckanswer()
    {
        int a=2+3;
        Assert.AreEqual(2, a);
    }
}

有没有办法阻止 n(场景计数)的 AfterScenario 执行？

Answer 1

你的钩子(Hook)被调用了这么多次，因为你已经在基类上实现了它。

Hooks 类似于 Step 绑定(bind)，它们是全局定义的。因此，您将 AfterScenario Hook 定义了多少次，您拥有多少个继承类。你只需要一次。请参阅此实现以满足您的要求:https://github.com/techtalk/SpecFlow.Plus.Examples/blob/master/SeleniumWebTest/TestApplication.UiTests/Support/Screenshots.cs

请查看 Gaspar Nagy 的博文:http://gasparnagy.com/2015/05/specflow-tips-problems-with-placing-step-definitions-to-base-classes/