public async Task ReceiveForm() { using (MockHttpServer.PostFormReturnForm(x => Task.FromResult(x))) { var client = HttpApiClient <IReceiveForm> .Create("http://localhost:8844/path"); var result = await client.GetForm("value&1", 5); Assert.AreEqual("value&1", result.Value1); Assert.AreEqual(5, result.Value2); } }