Make ActionMailer Synchronous In Test
rails
Written April 12, 2019
When you set up an ActionMailer email, the default configuration is for it
to use ActiveJob to send the emails. As of Rails 5, it will do so
asynchronously..
Depending on your preferences for testing emails, you may prefer ActiveJob
to send the emails synchronously. This can be done by changing the
queue_adapter back to :inline in your config/environments/test.rb.
config.active_job.queue_adapter = :inline
If you also configure the delivery_method as :test:
config.action_mailer.delivery_method = :test
then emails will be queued up in ActionMailer::Base.deliveries allowing
you to write a test like this:
expect(ActionMailer::Base.deliveries.count).to eq(1)
Check out the
docs for more on
ActionMailer.