Alexander Schmidt Mathematical methods, programming

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;

namespace ConsoleApplication1
{
    /// <summary>A web request creator for unit testing.</summary>
    class TestWebRequestCreate : IWebRequestCreate
    {
        static WebRequest nextRequest;
        static object lockObject = new object();

        static public WebRequest NextRequest
        {
            get { return nextRequest ;}
            set
            {
                lock (lockObject)
                {
                    nextRequest = value;
                }
            }
        }

        /// <summary>See <see cref="IWebRequestCreate.Create"/>.</summary>
        public WebRequest Create(Uri uri)
        {
            return nextRequest;
        }

        /// <summary>Utility method for creating a TestWebRequest and setting
        /// it to be the next WebRequest to use.</summary>
        /// <param name="response">The response the TestWebRequest will return.</param>
        public static TestWebRequest CreateTestRequest(string response)
        {
            TestWebRequest request = new TestWebRequest(response);
            NextRequest = request;
            return request;
        }
    }

    class TestWebRequest : WebRequest
    {
        MemoryStream requestStream = new MemoryStream();
        MemoryStream responseStream;

        public override string Method { get; set; }
        public override string ContentType { get; set; }
        public override long ContentLength { get; set; }

        /// <summary>Initializes a new instance of <see cref="TestWebRequest"/>
        /// with the response to return.</summary>
        public TestWebRequest(string response)
        {
            responseStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(response));
        }

        /// <summary>Returns the request contents as a string.</summary>
        public string ContentAsString()
        {
            return System.Text.Encoding.UTF8.GetString(requestStream.ToArray());
        }

        /// <summary>See <see cref="WebRequest.GetRequestStream"/>.</summary>
        public override Stream GetRequestStream()
        {
            return requestStream;
        }

        /// <summary>See <see cref="WebRequest.GetResponse"/>.</summary>
        public override WebResponse GetResponse()
        {
            return new TestWebReponse(responseStream);
        }
    }

    class TestWebReponse : WebResponse
    {
        Stream responseStream;

        /// <summary>Initializes a new instance of <see cref="TestWebReponse"/>
        /// with the response stream to return.</summary>
        public TestWebReponse(Stream responseStream)
        {
            this.responseStream = responseStream;
        }

        /// <summary>See <see cref="WebResponse.GetResponseStream"/>.</summary>
        public override Stream GetResponseStream()
        {
            return responseStream;
        }
    }
    
    class Program
    {
        static void Main(string[] args)
        {
            var creator = new TestWebRequestCreate();
            TestWebRequestCreate.CreateTestRequest("hello!");

            WebRequest.RegisterPrefix("http://cooluri.com", creator);

            var request = WebRequest.Create("http://cooluri.com");
            var response = request.GetResponse();
            using (var streamReader = new StreamReader(response.GetResponseStream()))
            {
                string json = streamReader.ReadToEnd().ToLowerInvariant();
            } 

        }
    }
}