adding highlights scopes tests for learning object

test/models/learning_object_test.rb

@@ -71,6 +71,14 @@ class LearningObjectTest < ActiveSupport::TestCase
     }
   end
 
+  test 'should get all learning objects created this week' do
+    LearningObject.this_week.each {|o| assert_instance_of LearningObject, o}
+  end
+
+  test 'should get all learning objects created this month' do
+    LearningObject.this_month.each {|o| assert_instance_of LearningObject, o}
+  end
+
   protected
 
   def sociable_object