diff --git a/judge/scripts/test/runner_spec.rb b/judge/scripts/test/runner_spec.rb
new file mode 100644
--- /dev/null
+++ b/judge/scripts/test/runner_spec.rb
@@ -0,0 +1,65 @@
+require File.join(File.dirname(__FILE__),'spec_helper')
+require File.join(File.dirname(__FILE__),'engine_spec_helper')
+
+describe "A grader runner, when grade task" do
+
+  include GraderEngineHelperMethods
+
+  before(:each) do
+    @config = Grader::Configuration.get_instance
+    @problem_test_normal = stub(Problem,
+                                :id => 1, :name => 'test_normal', 
+                                :full_score => 135)
+    @user_user1 = stub(User,
+                       :id => 1, :login => 'user1')
+    
+    @engine = Grader::Engine.new    
+    @runner = Grader::Runner.new(@engine)
+    init_sandbox
+  end
+
+  it "should just return nil when there is no submission" do
+    Task.should_receive(:get_inqueue_and_change_status).and_return(nil)
+    @runner.grade_oldest_task.should be_nil
+  end
+
+  it "should grade oldest task in queue" do
+    submission = create_normal_submission_mock_from_file("test1_correct.c")
+
+    submission.should_receive(:graded_at=)
+    submission.should_receive(:points=).with(135)
+    submission.should_receive(:grader_comment=).with(/^PASSED/)
+    submission.should_receive(:compiler_message=).with('')
+    submission.should_receive(:save)
+
+    # mock task
+    task = stub(Task,:id => 1, :submission_id => submission.id)
+    Task.should_receive(:get_inqueue_and_change_status).and_return(task)
+    task.should_receive(:status_complete!)
+
+    # mock Submission
+    Submission.should_receive(:find).
+      with(task.submission_id).
+      and_return(submission)
+
+    @runner.grade_oldest_task
+  end
+
+  # to be converted
+  def test_grade_oldest_task_with_grader_process
+    grader_process = stub
+    grader_process.expects(:report_active)
+
+    @runner = Grader::Runner.new(@engine,grader_process)
+
+    test_grade_oldest_task
+  end
+
+  protected
+
+  def create_normal_submission_mock_from_file(source_fname)
+    create_submission_from_file(1, @user_user1, @problem_test_normal, source_fname)
+  end
+  
+end
+