it 'should notify user and add to leader board if user is an expert' do
  user = mock_model(User, :is_expert? => true)
  topic = mock_model(Topic, :id => 1)
  collection = mock('col')
  collection.should_receive(:<<).with(user)
  topic.should_receive(:experts).and_return(collection)
  user.should_receive(:notify_about_topic!).with(topic)
  User.should_receive(:find).with(1).and_return(user)
  Topic.should_receive(:find).with(1).and_return(topic)
  post :notify, :topic_id => topic.id, :id => 1, :format => 'js'
  response.should be_succes
  assigns(:user).should == user
end