How to test with RSpec if an email is delivered

Question

I\'d like to test if an email is delivered if I call a controller method with :post. I\'ll use email_spec so I tried this snipped here: http://rubydoc.info/gems/email_spec/1

Answer 1

This is way how to test that Mailer is called with right arguments. You can use this code in feature, controller or mailer spec:

delivery = double
expect(delivery).to receive(:deliver_now).with(no_args)

expect(ReservationMailer).to receive(:confirm_email)
  .with('reservation')
  .and_return(delivery)