/// <summary>
        /// Sample response that has to be parsed:
        /// <entry>
        /// <title>
        ///  <link rel="enclosure" type="image/jpeg" href="https://live.staticflickr.com/65535/50044712313_aefaa149b2_b.jpg" />
        /// </title>
        /// </entry>
        /// </summary>
        /// <param name="response"></param>
        /// <returns></returns>
        private IResponseContext ParseResponse(HTTPAPIResponse response)
        {
            ImageResponseDataModel responseDataModel = new ImageResponseDataModel();

            if (response.Code != ErrorCodes.NoError)
            {
                responseDataModel.URI    = new ObservableCollection <string>();
                responseDataModel.Status = "Error in receiving response from server";
                return(responseDataModel);//in case of exception list wil be empty
            }

            try
            {
                //TODO: Add sample response here
                XmlDocument xmlResponseDoc = new XmlDocument();
                xmlResponseDoc.LoadXml(response.ResponseString);
                XmlNodeList entryNodes = xmlResponseDoc.GetElementsByTagName("entry");

                ObservableCollection <string> imageURICol = new ObservableCollection <string>();
                foreach (XmlNode entryNode in entryNodes)
                {
                    var childNodes = entryNode.ChildNodes.GetEnumerator();
                    while (childNodes.MoveNext())
                    {
                        XmlNode curNode = (XmlNode)childNodes.Current;
                        if (curNode?.Name == "link")
                        {
                            XmlNode hrefNode = curNode.Attributes.GetNamedItem("type");
                            if (hrefNode.Value == "image/jpeg")
                            {
                                imageURICol.Add(curNode.Attributes.GetNamedItem("href").Value);
                            }
                        }
                    }
                }
                responseDataModel.URI = imageURICol;
                Logger.Log("Successfully parsed flicker response");
                responseDataModel.Status = "Parsed response successfully";
            }
            catch (Exception exp)
            {
                Logger.Log("Exception while parsing response from flicker. Details:" + exp);
                responseDataModel.URI    = new ObservableCollection <string>();
                responseDataModel.Status = "Error in parsing response from server";

                //in case of exception list wil be empty
            }

            return(responseDataModel);
        }
        public async Task Test_FlickerSearchComponent_Negative()
        {
            IQueryContext qc = new QueryContext();

            qc.QueryParam = "Nature";
            qc.ApplicationConfiguration = new ApplicationConfiguration();
            IDataSource data = qc.ApplicationConfiguration.GetDataSource(DataSources.Flicker);

            ISearchComponent SearchComponent = new FlickerSearchSearchComponent(new MockHTTPAPIHelper("Test_FlickerSearchComponent_Negative"));
            IResponseContext rc = await SearchComponent.PerformSearch(qc);

            ImageResponseDataModel responseModel = rc as ImageResponseDataModel;

            Assert.IsNotNull(responseModel);

            Assert.AreEqual(responseModel.URI.Count, 0);
            Assert.IsNotNull(rc.Status);
        }