Added bounce_now_with

`ActionMailbox::Base#bounce_with` enqueues the bounce email. For
situations where it is preferable to skip the email queues, this
commit introduces `#bounce_now_with`, which sends the bounce email
immediately (like `deliver_now` vs. `deliver_later`).

    # Delivers the email immediately
    MyMailbox.bounce_now_with MyMailer.my_method(args)

actionmailbox/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Added `bounce_now_with` to send the bounce email without going through a mailer queue.
+
+    *Ronan Limon Duparcmeur*
+
 *   Support configured primary key types in generated migrations.
 
     *Nishiki Liu*

actionmailbox/lib/action_mailbox/base.rb

@@ -101,13 +101,18 @@ def finished_processing? # :nodoc:
       inbound_email.delivered? || inbound_email.bounced?
     end
 
-
     # Enqueues the given +message+ for delivery and changes the inbound email's status to +:bounced+.
     def bounce_with(message)
       inbound_email.bounced!
       message.deliver_later
     end
 
+    # Immediately sends the given +message+ and changes the inbound email's status to +:bounced+.
+    def bounce_now_with(message)
+      inbound_email.bounced!
+      message.deliver_now
+    end
+
     private
       def instrumentation_payload
         {

actionmailbox/test/unit/mailbox/bouncing_test.rb

@@ -8,6 +8,12 @@ def process
   end
 end
 
+class BouncingWithImmediateReplyMailbox < ActionMailbox::Base
+  def process
+    bounce_now_with BounceMailer.bounce(to: mail.from)
+  end
+end
+
 class ActionMailbox::Base::BouncingTest < ActiveSupport::TestCase
   include ActionMailer::TestHelper
 
@@ -16,6 +22,10 @@ class ActionMailbox::Base::BouncingTest < ActiveSupport::TestCase
       from: "sender@example.com", to: "replies@example.com", subject: "Bounce me"
   end
 
+  teardown do
+    ActionMailer::Base.deliveries.clear
+  end
+
   test "bouncing with a reply" do
     perform_enqueued_jobs only: ActionMailer::MailDeliveryJob do
       BouncingWithReplyMailbox.receive @inbound_email
@@ -28,4 +38,17 @@ class ActionMailbox::Base::BouncingTest < ActiveSupport::TestCase
     assert_equal %w[ sender@example.com ], mail.to
     assert_equal "Your email was not delivered", mail.subject
   end
+
+  test "bouncing now with a reply" do
+    assert_no_enqueued_emails do
+      BouncingWithImmediateReplyMailbox.receive @inbound_email
+    end
+
+    assert @inbound_email.bounced?
+    assert_emails 1
+
+    mail = ActionMailer::Base.deliveries.last
+    assert_equal %w[ sender@example.com ], mail.to
+    assert_equal "Your email was not delivered", mail.subject
+  end
 end