Add SetMultipartFormData func to Request (#337)

Author: Steven Arnott

request.go

@@ -322,6 +322,16 @@ func (r *Request) SetFileReader(param, fileName string, reader io.Reader) *Reque
 	return r
 }
 
+// SetMultipartFormData method allows simple form data to be attached to the request as `multipart:form-data`
+func (r *Request) SetMultipartFormData(data map[string]string) *Request {
+
+	for k, v := range data {
+		r = r.SetMultipartField(k, "", "", strings.NewReader(v))
+	}
+
+	return r
+}
+
 // SetMultipartField method is to set custom data using io.Reader for multipart upload.
 func (r *Request) SetMultipartField(param, fileName, contentType string, reader io.Reader) *Request {
 	r.isMultiPart = true

request_test.go

@@ -714,6 +714,19 @@ func TestMultiPartUploadFileNotOnGetOrDelete(t *testing.T) {
 	assertEqual(t, "multipart content is not allowed in HTTP verb [DELETE]", err.Error())
 }
 
+func TestMultiPartFormData(t *testing.T) {
+	ts := createFormPostServer(t)
+	defer ts.Close()
+	resp, err := dclr().
+		SetMultipartFormData(map[string]string{"first_name": "Jeevanandam", "last_name": "M", "zip_code": "00001"}).
+		SetBasicAuth("myuser", "mypass").
+		Post(ts.URL + "/profile")
+
+	assertError(t, err)
+	assertEqual(t, http.StatusOK, resp.StatusCode())
+	assertEqual(t, "Success", resp.String())
+}
+
 func TestMultiPartMultipartField(t *testing.T) {
 	ts := createFormPostServer(t)
 	defer ts.Close()