TestHttpMessageHandler.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

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

namespace Microsoft.AspNet.Authentication
{
    public class TestHttpMessageHandler : HttpMessageHandler
    {
        public Func<HttpRequestMessage, HttpResponseMessage> Sender { get; set; }

        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
        {
            if (Sender != null)
            {
                return Task.FromResult(Sender(request));
            }

            return Task.FromResult<HttpResponseMessage>(null);
        }
    }
}