rails/actionmailer/CHANGELOG.md

• Add MailDeliveryJob for delivering both regular and parameterized mail. Deprecate using DeliveryJob and Parameterized::DeliveryJob.

  Gannon McGibbon

• Fix ActionMailer assertions not working when a Mail defines a custom delivery job class

  Edouard Chin

• Mails with multipart format blocks with implicit render now also check for a template name in options hash instead of only using the action name.

  Marcus Ilgner

• ActionDispatch::IntegrationTest includes ActionMailer::TestHelper module by default.

  Ricardo Díaz

• Add perform_deliveries to a payload of deliver.action_mailer notification.

  Yoshiyuki Kinjo

• Change delivery logging message when perform_deliveries is false.

  Yoshiyuki Kinjo

• Allow call assert_enqueued_email_with with no block.

  Example:

  def test_email
    ContactMailer.welcome.deliver_later
    assert_enqueued_email_with ContactMailer, :welcome
  end
  
  def test_email_with_arguments
    ContactMailer.welcome("Hello", "Goodbye").deliver_later
    assert_enqueued_email_with ContactMailer, :welcome, args: ["Hello", "Goodbye"]
  end
  

  bogdanvlviv

• Ensure mail gem is eager autoloaded when eager load is true to prevent thread deadlocks.

  Samuel Cochran

• Perform email jobs in assert_emails.

  Gannon McGibbon

• Add Base.unregister_observer, Base.unregister_observers, Base.unregister_interceptor, Base.unregister_interceptors, Base.unregister_preview_interceptor and Base.unregister_preview_interceptors. This makes it possible to dynamically add and remove email observers and interceptors at runtime in the same way they're registered.

  Claudio Ortolina, Kota Miyake

• Rails 6 requires Ruby 2.5.0 or newer.

  Jeremy Daer, Kasper Timm Hansen

Please check 5-2-stable for previous changes.