[rspec-users] how to test a observer model?

[Zhenning Guan]

I have a user_observer, code like this:

def after_create(user)
 UserMailer.deliver_signup_notification(user)
 user.random_key = random_key_method
 user.save
end


  before do
    @user = mock_model(User)
    @user_observer = UserObserver.instance
  end

UserMailer.should_receive(:deliver_signup_notification).with(@user)
@user_observer.after_create(@user)
---------------------------------------

how can I test the random_key process?
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