/// <summary>
        /// Make a call to the HttpRequest and populate the Value property of
        /// every PlaceholderValue in Values based on the result.
        /// </summary>
        /// <param name="baseUrl"></param>
        /// <param name="credentials"></param>
        /// <param name="storedValues"></param>
        /// <param name="documents"></param>
        /// <returns></returns>
        public async Task <ValidationResult <bool> > MakeSetupRequestAsync(string baseUrl, AuthenicationCredentials credentials, Dictionary <string, string> storedValues, DocSet documents, ScenarioDefinition scenario)
        {
            var errors = new List <ValidationError>();

            if (!string.IsNullOrEmpty(this.CannedRequestName))
            {
                // We need to make a canned request setup request instead. Look up the canned request and then execute it, returning the results here.
                var cannedRequest =
                    (from cr in documents.CannedRequests where cr.Name == this.CannedRequestName select cr)
                    .FirstOrDefault();
                if (null == cannedRequest)
                {
                    errors.Add(new ValidationError(ValidationErrorCode.InvalidRequestFormat, null, "Couldn't locate the canned-request named: {0}", this.CannedRequestName));
                    return(new ValidationResult <bool>(false, errors));
                }

                return(await cannedRequest.MakeSetupRequestAsync(baseUrl, credentials, storedValues, documents, scenario));
            }

            // Get the HttpRequest, either from MethodName or by parsing HttpRequest
            HttpRequest request;

            try
            {
                request = this.GetHttpRequest(documents);
            }
            catch (Exception ex)
            {
                errors.Add(new ValidationError(ValidationErrorCode.InvalidRequestFormat, null, "An error occured creating the http request: {0}", ex.Message));
                return(new ValidationResult <bool>(false, errors));
            }

            MethodDefinition.AddTestHeaderToRequest(scenario, request);

            // If this is a canned request, we need to merge the parameters / placeholders here
            var placeholderValues = this.RequestParameters.ToPlaceholderValuesArray(storedValues);

            // Update the request with the parameters in request-parameters
            try
            {
                request.RewriteRequestWithParameters(placeholderValues);
            }
            catch (Exception ex)
            {
                errors.Add(new ValidationError(ValidationErrorCode.ParameterParserError, SourceName, "Error rewriting the request with parameters from the scenario: {0}", ex.Message));
                return(new ValidationResult <bool>(false, errors));
            }
            MethodDefinition.AddAccessTokenToRequest(credentials, request);
            errors.Add(new ValidationMessage(null, "Test-setup request:\n{0}", request.FullHttpText()));

            try
            {
                var response = await request.GetResponseAsync(baseUrl);

                if (response.RetryCount > 0)
                {
                    errors.Add(new ValidationWarning(ValidationErrorCode.RequestWasRetried, null, "HTTP request was retried {0} times.", response.RetryCount));
                }
                errors.Add(new ValidationMessage(null, "HTTP Response:\n{0}\n\n", response.FullText()));

                // Check to see if this request is "successful" or not
                if ((this.AllowedStatusCodes == null && response.WasSuccessful) ||
                    (this.AllowedStatusCodes != null && this.AllowedStatusCodes.Contains(response.StatusCode)))
                {
                    string expectedContentType = (null != this.OutputValues) ? ExpectedResponseContentType(this.OutputValues.Values) : null;

                    // Check for content type mismatch
                    if (string.IsNullOrEmpty(response.ContentType) && expectedContentType != null)
                    {
                        return(new ValidationResult <bool>(false, new ValidationError(ValidationErrorCode.UnsupportedContentType, SourceName, "No Content-Type found for a non-204 response")));
                    }

                    // Load requested values into stored values
                    if (null != this.OutputValues)
                    {
                        foreach (var outputKey in this.OutputValues.Keys)
                        {
                            var source = this.OutputValues[outputKey];
                            storedValues[outputKey] = response.ValueForKeyedIdentifier(source);
                        }
                    }

                    return(new ValidationResult <bool>(!errors.Any(x => x.IsError), errors));
                }
                else
                {
                    if ((this.AllowedStatusCodes != null && !this.AllowedStatusCodes.Contains(response.StatusCode)) || !response.WasSuccessful)
                    {
                        string expectedCodes = "200-299";
                        if (this.AllowedStatusCodes != null)
                        {
                            expectedCodes = this.AllowedStatusCodes.ComponentsJoinedByString(",");
                        }
                        errors.Add(new ValidationError(ValidationErrorCode.HttpStatusCodeDifferent, SourceName, "Http response status code {0} didn't match expected values: {1}", response.StatusCode, expectedCodes));
                    }
                    else
                    {
                        errors.Add(new ValidationError(ValidationErrorCode.HttpStatusCodeDifferent, SourceName, "Http response content type was invalid: {0}", response.ContentType));
                    }

                    return(new ValidationResult <bool>(false, errors));
                }
            }
            catch (Exception ex)
            {
                errors.Add(new ValidationError(ValidationErrorCode.Unknown, SourceName, "Exception while making request: {0}", ex.Message));
                return(new ValidationResult <bool>(false, errors));
            }
        }