Web Api 如何做上传文件的单元测试

代码如下：

            //--------上传------------
            HttpClient client = new HttpClient();
            #region
            MultipartFormDataContent form = new MultipartFormDataContent();
            StreamContent fileContent = new StreamContent(File.OpenRead(@"D:uni-all-resourcesCloudShopSourceDevelopmentUni2uni.iShopUni2uni.iShop.WebApiUploadAudioios_2.pcm"));
            fileContent.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
            fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");
            fileContent.Headers.ContentDisposition.FileName = "ios_2.pcm";
            form.Add(fileContent);
            #endregion

            HttpResponseMessage res = client.PostAsync("http://app.uni2uni.com/api/Audio/UploadAudioResponseMessage", form).Result;
            var uploadModel = res.Content.ReadAsStringAsync().Result;