HttpClient with handler for testing

Program.cs

using System;
using System.Net;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApplication11
{
    class Program
    {
        static void Main(string[] args)
        {
            
            var http = new HttpClient(new FakeHandler());
            http.BaseAddress = new Uri("http://example.com");
            var result = http.GetStringAsync("/").Result;
            Console.WriteLine(result);
            Console.ReadLine();
        }
    }

    public class FakeHandler : HttpMessageHandler
    {
        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            var response = new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = new StringContent("Sup")
            };

            var tcs = new TaskCompletionSource<HttpResponseMessage>();
            tcs.SetResult(response);

            return tcs.Task;
        }
    }
}