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Fix CS1998 (async method lacks await)

edited Mar 5, 2021 at 16:55

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You can replace the core HttpMessageHandler with a fake one. Something that looks like this...

public class FakeResponseHandler : DelegatingHandler  {   private readonly Dictionary<Uri, HttpResponseMessage> _FakeResponses = new Dictionary<Uri, HttpResponseMessage>();      public void AddFakeResponse(Uri uri, HttpResponseMessage responseMessage)   {   _FakeResponses.Add(uri, responseMessage);   }   protected async override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)   {   if (_FakeResponses.ContainsKey(request.RequestUri))   {   return Task.FromResult(_FakeResponses[request.RequestUri];RequestUri]);   }   else   {   return Task.FromResult(new HttpResponseMessage(HttpStatusCode.NotFound) { RequestMessage = request });   }    }  }

and then you can create a client that will use the fake handler.

var fakeResponseHandler = new FakeResponseHandler(); fakeResponseHandler.AddFakeResponse(new Uri("http://example.org/test"), new HttpResponseMessage(HttpStatusCode.OK)); var httpClient = new HttpClient(fakeResponseHandler); var response1 = await httpClient.GetAsync("http://example.org/notthere"); var response2 = await httpClient.GetAsync("http://example.org/test"); Assert.Equal(response1.StatusCode,HttpStatusCode.NotFound); Assert.Equal(response2.StatusCode, HttpStatusCode.OK);

You can replace the core HttpMessageHandler with a fake one. Something that looks like this...

public class FakeResponseHandler : DelegatingHandler  {   private readonly Dictionary<Uri, HttpResponseMessage> _FakeResponses = new Dictionary<Uri, HttpResponseMessage>();      public void AddFakeResponse(Uri uri, HttpResponseMessage responseMessage)   {   _FakeResponses.Add(uri,responseMessage);   }   protected async override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)   {   if (_FakeResponses.ContainsKey(request.RequestUri))   {   return _FakeResponses[request.RequestUri];   }   else   {   return new HttpResponseMessage(HttpStatusCode.NotFound) { RequestMessage = request};   }    }  }

and then you can create a client that will use the fake handler.

var fakeResponseHandler = new FakeResponseHandler(); fakeResponseHandler.AddFakeResponse(new Uri("http://example.org/test"), new HttpResponseMessage(HttpStatusCode.OK)); var httpClient = new HttpClient(fakeResponseHandler); var response1 = await httpClient.GetAsync("http://example.org/notthere"); var response2 = await httpClient.GetAsync("http://example.org/test"); Assert.Equal(response1.StatusCode,HttpStatusCode.NotFound); Assert.Equal(response2.StatusCode, HttpStatusCode.OK);

You can replace the core HttpMessageHandler with a fake one. Something that looks like this...

public class FakeResponseHandler : DelegatingHandler { private readonly Dictionary<Uri, HttpResponseMessage> _FakeResponses = new Dictionary<Uri, HttpResponseMessage>(); public void AddFakeResponse(Uri uri, HttpResponseMessage responseMessage) { _FakeResponses.Add(uri, responseMessage); } protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) { if (_FakeResponses.ContainsKey(request.RequestUri)) { return Task.FromResult(_FakeResponses[request.RequestUri]); } else { return Task.FromResult(new HttpResponseMessage(HttpStatusCode.NotFound) { RequestMessage = request }); } } }

and then you can create a client that will use the fake handler.

var fakeResponseHandler = new FakeResponseHandler(); fakeResponseHandler.AddFakeResponse(new Uri("http://example.org/test"), new HttpResponseMessage(HttpStatusCode.OK)); var httpClient = new HttpClient(fakeResponseHandler); var response1 = await httpClient.GetAsync("http://example.org/notthere"); var response2 = await httpClient.GetAsync("http://example.org/test"); Assert.Equal(response1.StatusCode,HttpStatusCode.NotFound); Assert.Equal(response2.StatusCode, HttpStatusCode.OK);

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answered Mar 8, 2014 at 3:09

Darrel Miller

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You can replace the core HttpMessageHandler with a fake one. Something that looks like this...

public class FakeResponseHandler : DelegatingHandler { private readonly Dictionary<Uri, HttpResponseMessage> _FakeResponses = new Dictionary<Uri, HttpResponseMessage>(); public void AddFakeResponse(Uri uri, HttpResponseMessage responseMessage) { _FakeResponses.Add(uri,responseMessage); } protected async override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) { if (_FakeResponses.ContainsKey(request.RequestUri)) { return _FakeResponses[request.RequestUri]; } else { return new HttpResponseMessage(HttpStatusCode.NotFound) { RequestMessage = request}; } } }

and then you can create a client that will use the fake handler.

var fakeResponseHandler = new FakeResponseHandler(); fakeResponseHandler.AddFakeResponse(new Uri("http://example.org/test"), new HttpResponseMessage(HttpStatusCode.OK)); var httpClient = new HttpClient(fakeResponseHandler); var response1 = await httpClient.GetAsync("http://example.org/notthere"); var response2 = await httpClient.GetAsync("http://example.org/test"); Assert.Equal(response1.StatusCode,HttpStatusCode.NotFound); Assert.Equal(response2.StatusCode, HttpStatusCode.OK);

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