Testing ASP.NET Web API Multipart Form Data File upload -

i trying use n-unit test web api application unable find proper way test file upload method. best approach test method?

web api controller:

[acceptverbs("post")] public async task<httpresponsemessage> validate()     {         // check if request contains multipart/form-data.         if (!request.content.ismimemultipartcontent())         {             return request.createerrorresponse(httpstatuscode.unsupportedmediatype,"please submit valid request");         }         var provider = new multipartmemorystreamprovider(); // loads file memory 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;         // stuff , 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);         }     } 

based on above comment, following example:

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; 

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the request on wire like:

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--