.NET WebTest - Get Response Bytes for ValidationRule

I need to create a ValidationRule to test response bytes including responses for dependent requests. It is easy task to get response bytes for main requests, but I can not access responses for dependent requests. I have no idea how to do that.

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 validationR开发者_开发技巧ule3 = 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;                
        }
    }
}

I finally done my task! The way is to set up event handler on PostRequest of main request in WebTest.GetRequestEnumerator and set up ValidateResponse event handlers for dependent requests there. Here is the code:

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);
        }
    }
}

Perhaps adding the event handler manually to the dependant requests would work until a better idea presents itself.

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