testing Delayed Job email sends

... # building up the user, post and topic objects
    assert_difference('Delayed::Job.count') do
      user.send_forum_notification(:post => post, :topic => topic)  
    end
    
    assert_emails 1 do  
      Delayed::Worker.new.work_off
    end 
    notification_email = ActionMailer::Base.deliveries.first 
    
    assert_equal "Forum Topic Notification", notification_email.subject
    assert_equal user.email, notification_email.to.first  
    assert_match /#{user.userid},/, notification_email.body 
    assert_match /The topic, #{topic.title},/, notification_email.body 
    assert_match /in the #{forum.name} forum/, notification_email.body 
    assert_match /post from #{topic.user.display_name}\./, notification_email.body 
    assert_match /#{post.body}/, notification_email.body