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copied!<p>You may wish to change your consuming code to take in an interface for a factory that creates requests and responses that can be mocked which wrap the actual implementation.</p> <h2>Update: Revisiting</h2> <p>I've been getting downvotes long after my answer was accepted, and I admit my original answer was poor quality and made a big assumption.</p> <h3>Mocking HttpWebRequest in 4.5+</h3> <p>The confusion from my original answer lies in the fact that you can mock <code>HttpWebResponse</code> in 4.5, but not earlier versions. Mocking it in 4.5 also utilizes obsolete constructors. So, the recommended course of action is to abstract the request and response. Anyways, below is a complete working test using .NET 4.5 with Moq 4.2.</p> <pre><code>[Test] public void Create_should_create_request_and_respond_with_stream() { // arrange var expected = "response content"; var expectedBytes = Encoding.UTF8.GetBytes(expected); var responseStream = new MemoryStream(); responseStream.Write(expectedBytes, 0, expectedBytes.Length); responseStream.Seek(0, SeekOrigin.Begin); var response = new Mock<HttpWebResponse>(); response.Setup(c => c.GetResponseStream()).Returns(responseStream); var request = new Mock<HttpWebRequest>(); request.Setup(c => c.GetResponse()).Returns(response.Object); var factory = new Mock<IHttpWebRequestFactory>(); factory.Setup(c => c.Create(It.IsAny<string>())) .Returns(request.Object); // act var actualRequest = factory.Object.Create("http://www.google.com"); actualRequest.Method = WebRequestMethods.Http.Get; string actual; using (var httpWebResponse = (HttpWebResponse)actualRequest.GetResponse()) { using (var streamReader = new StreamReader(httpWebResponse.GetResponseStream())) { actual = streamReader.ReadToEnd(); } } // assert actual.Should().Be(expected); } public interface IHttpWebRequestFactory { HttpWebRequest Create(string uri); } </code></pre> <h3>Better answer: Abstract the Response and Request</h3> <p>Here's a safer bare-bones implementation of an abstraction that will work for prior versions (well, down to 3.5 at least):</p> <pre><code>[Test] public void Create_should_create_request_and_respond_with_stream() { // arrange var expected = "response content"; var expectedBytes = Encoding.UTF8.GetBytes(expected); var responseStream = new MemoryStream(); responseStream.Write(expectedBytes, 0, expectedBytes.Length); responseStream.Seek(0, SeekOrigin.Begin); var response = new Mock<IHttpWebResponse>(); response.Setup(c => c.GetResponseStream()).Returns(responseStream); var request = new Mock<IHttpWebRequest>(); request.Setup(c => c.GetResponse()).Returns(response.Object); var factory = new Mock<IHttpWebRequestFactory>(); factory.Setup(c => c.Create(It.IsAny<string>())) .Returns(request.Object); // act var actualRequest = factory.Object.Create("http://www.google.com"); actualRequest.Method = WebRequestMethods.Http.Get; string actual; using (var httpWebResponse = actualRequest.GetResponse()) { using (var streamReader = new StreamReader(httpWebResponse.GetResponseStream())) { actual = streamReader.ReadToEnd(); } } // assert actual.Should().Be(expected); } public interface IHttpWebRequest { // expose the members you need string Method { get; set; } IHttpWebResponse GetResponse(); } public interface IHttpWebResponse : IDisposable { // expose the members you need Stream GetResponseStream(); } public interface IHttpWebRequestFactory { IHttpWebRequest Create(string uri); } // barebones implementation private class HttpWebRequestFactory : IHttpWebRequestFactory { public IHttpWebRequest Create(string uri) { return new WrapHttpWebRequest((HttpWebRequest)WebRequest.Create(uri)); } } public class WrapHttpWebRequest : IHttpWebRequest { private readonly HttpWebRequest _request; public WrapHttpWebRequest(HttpWebRequest request) { _request = request; } public string Method { get { return _request.Method; } set { _request.Method = value; } } public IHttpWebResponse GetResponse() { return new WrapHttpWebResponse((HttpWebResponse)_request.GetResponse()); } } public class WrapHttpWebResponse : IHttpWebResponse { private WebResponse _response; public WrapHttpWebResponse(HttpWebResponse response) { _response = response; } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } private void Dispose(bool disposing) { if (disposing) { if (_response != null) { ((IDisposable)_response).Dispose(); _response = null; } } } public Stream GetResponseStream() { return _response.GetResponseStream(); } } </code></pre>

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