Intégration test with HttpClient

Hi guys,

I'm trying to create some specflow tests and using a WebApplicationFactory and want to moq HttpClient calls with Moq.Contrib.HttpClient.

So i've 2 differents HttpClients 

var httpMessageHandler1 = new Mock<HttpMessageHandler>();
            httpMessageHandler1.SetupRequest(HttpMethod.Post, $"http://localhost/api/Method1");
            var httpMessageHandler2 = new Mock<HttpMessageHandler>();
            httpMessageHandler2
                .SetupRequest(HttpMethod.Post, $"http://localhost/api/Method2")
                .ReturnsResponse(JsonSerializer.Serialize(response), "application/json");

I inject them like this in the stepDefinition class :

var application = new WebFactory<Program>()
                .WithWebHostBuilder(builder =>
                {
                    builder.ConfigureServices(services =>
                    {
                        var serviceProvider = services.BuildServiceProvider();
                        services.AddMediatR(typeof(DeviceRequestModel));
                        services.AddHttpClient("Client1").ConfigurePrimaryHttpMessageHandler(() => httpMessageHandler1.Object);
                        services.AddHttpClient("Client2").ConfigurePrimaryHttpMessageHandler(() => httpMessageHandler2.Object);
                    });
                });

Here is my WebFactory :

    internal class WebFactory<TStartup> : WebApplicationFactory<TStartup> where TStartup : class
    {
        protected override void ConfigureWebHost(IWebHostBuilder builder)
        {
            base.ConfigureWebHost(builder);
            builder.UseEnvironment(Environments.Development);
            builder.UseTestServer()
                   .ConfigureTestServices(
                        services =>
                        {
                            services.AddScoped<TStartup>();

                            // Remove existing IHttpClientFactory and HttpClient
                            var httpClientFactoryDescriptor = services.SingleOrDefault(d => d.ServiceType == typeof(IHttpClientFactory));
                            services.Remove(httpClientFactoryDescriptor);

                            var httpClientDescriptor = services.SingleOrDefault(d => d.ServiceType == typeof(HttpClient));
                            services.Remove(httpClientDescriptor);
                        });
        }
    }

In my Command, i get the IHttpClientFactory

        public Handler(IHttpClientFactory factory)
        {
            this.client = factory.CreateClient("Client1");
        }

So when i do the  HttpResponseMessage response = await this.client.PostAsync i've got this exception Exception levée : 'System.InvalidOperationException' dans System.Net.Http.dll and my client is not intiated well (doesn't match with the moq)

Any ideas?

Thanks