diff --git a/app/models/test_request.rb b/app/models/test_request.rb
new file mode 100644
--- /dev/null
+++ b/app/models/test_request.rb
@@ -0,0 +1,64 @@
+require 'fileutils'
+
+class TestRequest < Task
+
+  set_table_name "test_requests"
+
+  belongs_to :user
+  belongs_to :problem
+  belongs_to :submission
+
+  def self.get_inqueue_and_change_status(status)
+    # since there will be only one grader grading TestRequest
+    # we do not need locking (hopefully)
+    
+    task = Task.find(:first, 
+                     :order => "created_at", 
+                     :conditions => {:status=> Task::STATUS_INQUEUE})
+    if task!=nil
+      task.status = status
+      task.save!
+    end
+    
+    task
+  end
+
+  # interfacing with form
+  def self.new_from_form_params(user,params)
+    test_request = TestRequest.new
+    test_request.user = user
+    problem = Problem.find(params[:problem_id])
+    test_request.problem = problem
+    test_request.submission = 
+      Submission.find_by_user_problem_number(user.id,
+                                             problem.id,
+                                             params[:submission_number])
+    test_request.input_file_name = save_input_file(params[:input_file], user, problem)
+    test_request.submitted_at = Time.new
+    test_request.status_inqueue
+    test_request
+  end
+
+  protected
+  def self.input_file_name(user,problem)
+    begin
+      tmpname = UPLOADED_INPUT_FILE_DIR + "/#{user.login}/#{problem.name}/#{rand(10000)}"
+    end while File.exists?(tmpname)
+    tmpname
+  end
+
+  def self.save_input_file(tempfile, user, problem)
+    new_file_name = input_file_name(user,problem)
+    dirname = File.dirname(new_file_name)
+    FileUtils.mkdir_p(File.dirname(new_file_name)) if !File.exists?(dirname)
+    if tempfile.instance_of?(Tempfile)
+      tempfile.close
+      FileUtils.move(tempfile.path,new_file_name)
+    else      
+      File.open(new_file_name, "wb") do |f| 
+        f.write(tempfile.read) 
+      end
+    end
+    new_file_name
+  end
+end