.NET WebTest - 获取 ValidationRule 的响应字节

Question

我需要创建一个 ValidationRule 来测试响应字节，包括相关请求的响应。获取主请求的响应字节是很容易的任务，但我无法访问相关请求的响应。我不知道该怎么做。

public class WebTest1Coded : WebTest
{

    public WebTest1Coded()
    {
        this.PreAuthenticate = true;
    }

    public long ResponseBytesLength { get; set; }

    public override IEnumerator<WebTestRequest> GetRequestEnumerator()
    {
        if ((this.Context.ValidationLevel >= Microsoft.VisualStudio.TestTools.WebTesting.ValidationLevel.Low))
        {
            ValidationResponseRuleNumberOfBytes validationRule3 = new ValidationResponseRuleNumberOfBytes();
            this.ValidateResponseOnPageComplete += new EventHandler<ValidationEventArgs>(validationRule3.Validate);
        }

        WebTestRequest request1 = new WebTestRequest("http://localhost/open.aspx");
        request1.ThinkTime = 2;
        yield return request1;
        request1 = null;
    }
}

public class ValidationResponseRuleNumberOfBytes : ValidationRule
{

    public override string RuleName
    {
        get { return "Validate Page Size"; }
    }

    public override string RuleDescription
    {
        get { return "Validates that the page is less then 300 000 bytes."; }
    }

    public override void Validate(object sender, ValidationEventArgs e)
    {
        if (e.Response.HtmlDocument != null)
        {
            e.Message = string.Format("Page length is {0}", e.Response.BodyBytes.Length);
            e.IsValid = e.Response.BodyBytes.Length < 300000;                
        }
    }
}

Answer 1

我终于完成了我的任务！方法是在 WebTest.GetRequestEnumerator 中的主请求的 PostRequest 上设置事件处理程序，并在那里为依赖请求设置 ValidateResponse 事件处理程序。这是代码：

public class PageSize : WebTest
{

    public PageSize()
    {
        this.PreAuthenticate = true;
    }

    public int DependentResponsesBytes { get; set; }

    public long ResponseBytesLength { get; set; }
    public long ResponseBytesLengthMaximum { get; set; }

    public override IEnumerator<WebTestRequest> GetRequestEnumerator()
    {
        if ((this.Context.ValidationLevel >= Microsoft.VisualStudio.TestTools.WebTesting.ValidationLevel.Low))
        {
            ValidationResponseRuleNumberOfBytes validationRule3 = new ValidationResponseRuleNumberOfBytes();
            this.ValidateResponseOnPageComplete += new EventHandler<ValidationEventArgs>(validationRule3.Validate);
        }

        WebTestRequest request1 = new WebTestRequest("http://localhost/open.aspx");
        request1.ThinkTime = 2;
        DependentResponsesBytes = 0;
        ResponseBytesLengthMaximum = 300000;
        request1.PostRequest += new EventHandler<PostRequestEventArgs>(SetValidationEventsForDependentResponses);
        yield return request1;

        request1 = new WebTestRequest("http://localhost/welcome.aspx");
        request1.ThinkTime = 2;
        DependentResponsesBytes = 0;
        ResponseBytesLengthMaximum = 400000;
        request1.PostRequest += new EventHandler<PostRequestEventArgs>(SetValidationEventsForDependentResponses);
        yield return request1;

        request1 = null;
    }

    void SetValidationEventsForDependentResponses(object sender, PostRequestEventArgs e)
    {
        foreach (WebTestRequest depententRequest in e.Request.DependentRequests)
        {
            depententRequest.ValidateResponse += new EventHandler<ValidationEventArgs>(depententRequest_ValidateResponse);
        }
    }

    void depententRequest_ValidateResponse(object sender, ValidationEventArgs e)
    {
        DependentResponsesBytes += e.Response.BodyBytes.Length;
    }
}

public class ValidationResponseRuleNumberOfBytes : ValidationRule
{

    public override string RuleName
    {
        get { return "Validate Page Size"; }
    }

    public override string RuleDescription
    {
        get { return string.Format("Validates that the page is less then some number of bytes set in WebTest."); }
    }

    public override void Validate(object sender, ValidationEventArgs e)
    {
        if (e.Response.HtmlDocument != null)
        {
            int totalBytes = e.Response.BodyBytes.Length + ((PageSize)e.WebTest).DependentResponsesBytes;
            e.Message = string.Format("Page length is {0}", totalBytes);
            if (totalBytes < ((PageSize)e.WebTest).ResponseBytesLengthMaximum)
            {
                e.IsValid = true;
                e.Message = "Passed";                    
            }
            else
            {
                e.IsValid = false;
                e.Message = "Failed";
            }
            e.Message += string.Format(". Page length is {0} bytes. Maximum is {1}", totalBytes, ((PageSize)e.WebTest).ResponseBytesLengthMaximum);
        }
    }
}

Answer 2

也许手动将事件处理程序添加到相关请求中会起作用，直到出现更好的想法。

foreach (WebTestRequest request in request1.DependentRequests)
{
    request.ValidateResponse += new EventHandler<ValidationEventArgs>(validationRule3.Validate);
}