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Mock an Asp.Net Core HttpClient with a custom HttpMessageHandler using Moq
using System;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
using Moq;
using Moq.Protected;
namespace Tests
public class MockHttpClient
public HttpClient GetMockClient()
var mockHttpMessageHandler = new Mock<HttpMessageHandler>();
.Setup<Task<HttpResponseMessage>>("SendAsync", ItExpr.IsAny<HttpRequestMessage>(), ItExpr.IsAny<CancellationToken>())
.Returns((HttpRequestMessage request, CancellationToken cancellationToken) => GetMockResponse(request, cancellationToken));
return new HttpClient(mockHttpMessageHandler.Object);
private Task<HttpResponseMessage> GetMockResponse(HttpRequestMessage request, CancellationToken cancellationToken)
if (request.RequestUri.LocalPath == "/expectedPath")
var response = new HttpResponseMessage(System.Net.HttpStatusCode.OK);
response.Content = new StringContent(GetAuthJson(), Encoding.UTF8, "application/json");
return Task.FromResult(response);
throw new NotImplementedException();
private string GetAuthJson()
return "{ \"isAuthenticated\": true }";
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is there a dependency needed for GetAuthJson() ?

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Hi @spencerdavis2000, I'v just added GetAuthJson(). This gist only shows a minimal example of what's required to get it working, so there's not much of an actual implementation there.

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