diff --git a/app/controllers/test_controller.rb b/app/controllers/test_controller.rb
--- a/app/controllers/test_controller.rb
+++ b/app/controllers/test_controller.rb
@@ -2,7 +2,7 @@
 
   before_filter :authenticate
 
-  verify :method => :post, :only => [:test_submit],
+  verify :method => :post, :only => [:submit],
          :redirect_to => { :action => :index }
 
   def index
@@ -24,8 +24,12 @@
   
   def read
     user = User.find(session[:user_id])
-    test_request = TestRequest.find(params[:id])
-    if test_request.user_id != user.id
+    begin
+      test_request = TestRequest.find(params[:id])
+    rescue
+      test_request = nil
+    end
+    if test_request==nil or test_request.user_id != user.id
       flash[:notice] = 'Invalid output'
       redirect_to :action => 'index'
       return
@@ -42,6 +46,20 @@
     end
     redirect_to :action => 'index'
   end
+
+  def result
+    @user = User.find(session[:user_id])
+    begin
+      @test_request = TestRequest.find(params[:id])
+    rescue
+      @test_request = nil
+    end
+    if @test_request==nil or @test_request.user_id != @user.id
+      flash[:notice] = 'Invalid request'
+      redirect_to :action => 'index'
+      return
+    end
+  end
     
   protected
   
diff --git a/app/helpers/test_helper.rb b/app/helpers/test_helper.rb
--- a/app/helpers/test_helper.rb
+++ b/app/helpers/test_helper.rb
@@ -1,2 +1,11 @@
 module TestHelper
+
+  def read_textfile(fname,max_size=2048)
+    begin
+      File.open(fname).read(max_size)
+    rescue
+      nil
+    end
+  end
+
 end
diff --git a/app/views/test/_test_request.html.haml b/app/views/test/_test_request.html.haml
--- a/app/views/test/_test_request.html.haml
+++ b/app/views/test/_test_request.html.haml
@@ -12,3 +12,4 @@
       = link_to '[output]', :action => 'read', :id => test_request.id
   %td= test_request.grader_comment or ''
   %td= simple_format((test_request.compiler_message or ''))
+  %td= link_to '[view]', :action => 'result', :id => test_request.id
diff --git a/app/views/test/index.html.erb b/app/views/test/index.html.erb
--- a/app/views/test/index.html.erb
+++ b/app/views/test/index.html.erb
@@ -74,6 +74,7 @@
     <th>output (first 2kb)</th>
     <th>grading comment</th>
     <th>compiler message</th>
+    <th>Detail</th>
   </tr>
   <%= render :partial => 'test_request', :collection => @test_requests %>
 </table>
diff --git a/spec/controllers/main_controller_spec.rb b/spec/controllers/main_controller_spec.rb
--- a/spec/controllers/main_controller_spec.rb
+++ b/spec/controllers/main_controller_spec.rb
@@ -14,26 +14,34 @@
                        :source => 'sample source',
                        :compiler_message => 'none')
     @user = mock(User, :id => 1, :login => 'john')
-    Submission.should_receive(:find).with(@submission.id.to_s).and_return(@submission)
+  end
+
+  it "should redirect user to login page when unlogged-in user try to access main/list" do
+    get 'list'
+    response.should redirect_to(:action => 'login')
   end
 
   it "should let user sees her own source" do
+    Submission.should_receive(:find).with(@submission.id.to_s).and_return(@submission)
     get 'source', {:id => @submission.id}, {:user_id => 1}
     response.should be_success
   end
 
   it "should let user sees her own compiler message" do
+    Submission.should_receive(:find).with(@submission.id.to_s).and_return(@submission)
     get 'compiler_msg', {:id => @submission.id}, {:user_id => 1}
     response.should be_success
   end
 
   it "should not let user sees other user's source" do
+    Submission.should_receive(:find).with(@submission.id.to_s).and_return(@submission)
     get 'source', {:id => @submission.id}, {:user_id => 2}
     flash[:notice].should =~ /[Ee]rror/ 
     response.should redirect_to(:action => 'list')
   end
 
   it "should not let user sees other user's compiler message" do
+    Submission.should_receive(:find).with(@submission.id.to_s).and_return(@submission)
     get 'compiler_msg', {:id => @submission.id}, {:user_id => 2}
     flash[:notice].should =~ /[Ee]rror/ 
     response.should redirect_to(:action => 'list')