public async Task PostStringMultipart() { using (MockHttpServer.PostMultipartReturnJson(x => Task.FromResult <JToken>(((StringHttpBody)x.Data["value"].Body).Text))) { var client = HttpApiClient <IPostStringMultipart> .Create("http://localhost:8844/path"); var result = await client.PostString("foo"); Assert.AreEqual("foo", result); } }