单元测试 – 测试ASP.NET Web API多部分表单数据文件上载

我正在尝试使用N-UNIT来测试我的Web API应用程序,但我无法找到一种正确的方法来测试我的文件上传方法.哪种方法是测试方法的最佳方法？

Web API控制器：

[AcceptVerbs("post")]
public async Task<HttpResponseMessage> Validate()
    {
        // Check if the request contains multipart/form-data.
        if (!Request.Content.IsMimeMultipartContent())
        {
            return Request.CreateErrorResponse(HttpStatusCode.UnsupportedMediaType,"please submit a valid request");
        }
        var provider = new MultipartMemoryStreamProvider(); // this loads the file into memory for later on processing 
        try
        {
            await Request.Content.ReadAsMultipartAsync(provider);
            var resp = new HttpResponseMessage(HttpStatusCode.OK);
            foreach (var item in provider.Contents)
            {
                if (item.Headers.Contentdisposition.FileName != null)
                {
                    Stream stream = item.ReadAsstreamAsync().Result;
        // do some stuff and return response
                    resp.Content = new StringContent(result,Encoding.UTF8,"application/xml"); //text/plain "application/xml"
                    return resp;
                }
            }
               return resp;
        }
        catch (System.Exception e)
        {
            return Request.CreateErrorResponse(HttpStatusCode.InternalServerError,e);
        }
    }

解决方法

根据您的上述评论,以下是一个示例：

HttpClient client = new HttpClient();

MultipartFormDataContent formDataContent = new MultipartFormDataContent();
formDataContent.Add(new StringContent("Hello World!"),name: "greeting");
StreamContent file1 = new StreamContent(File.OpenRead(@"C:\Images\Image1.jpeg"));
file1.Headers.ContentType = new MediaTypeHeaderValue("image/jpeg");
file1.Headers.Contentdisposition = new ContentdispositionHeaderValue("form-data");
file1.Headers.Contentdisposition.FileName = "Image1.jpeg";
formDataContent.Add(file1);
StreamContent file2 = new StreamContent(File.OpenRead(@"C:\Images\Image2.jpeg"));
file2.Headers.ContentType = new MediaTypeHeaderValue("image/jpeg");
file2.Headers.Contentdisposition = new ContentdispositionHeaderValue("form-data");
file2.Headers.Contentdisposition.FileName = "Image1.jpeg";
formDataContent.Add(file2);

HttpResponseMessage response = client.PostAsync("http://loclhost:9095/api/fileuploads",formDataContent).Result;

通过电线的请求将是：

POST http://localhost:9095/api/fileuploads HTTP/1.1
Content-Type: multipart/form-data; boundary="34d56c28-919b-42ab-8462-076b400bd03f"
Host: localhost:9095
Content-Length: 486
Expect: 100-continue
Connection: Keep-Alive

--34d56c28-919b-42ab-8462-076b400bd03f
Content-Type: text/plain; charset=utf-8
Content-disposition: form-data; name=greeting

Hello World!
--34d56c28-919b-42ab-8462-076b400bd03f
Content-Type: image/jpeg
Content-disposition: form-data; filename=Image1.jpeg

----Your Image here-------
--34d56c28-919b-42ab-8462-076b400bd03f
Content-Type: image/jpeg
Content-disposition: form-data; filename=Image2.jpeg

----Your Image here-------
--34d56c28-919b-42ab-8462-076b400bd03f--