2 files changed, 37 insertions, 0 deletions
diff --git a/test/test_helper.rb b/test/test_helper.rb
index b042cfb679..264f9e8482 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -32,3 +32,11 @@ if ARGV.include?("-v")
   ActiveRecord::Base.logger = Logger.new(STDOUT)
   ActiveJob::Base.logger    = Logger.new(STDOUT)
 end
+
+class BounceMailer < ActionMailer::Base
+  def bounce(to:)
+    mail from: "receiver@example.com", to: to, subject: "Your email was not delivered" do |format|
+      format.html { render plain: "Sorry!" }
+    end
+  end
+end
diff --git a/test/unit/mailbox/bouncing_test.rb b/test/unit/mailbox/bouncing_test.rb
new file mode 100644
index 0000000000..6ac806ba29
--- /dev/null
+++ b/test/unit/mailbox/bouncing_test.rb
@@ -0,0 +1,29 @@
+require_relative '../../test_helper'
+
+class BouncingWithReplyMailbox < ActionMailbox::Base
+  def process
+    bounce_with BounceMailer.bounce(to: mail.from)
+  end
+end
+
+class ActionMailbox::Base::BouncingTest < ActiveSupport::TestCase
+  include ActionMailer::TestHelper
+
+  setup do
+    @inbound_email = create_inbound_email_from_mail \
+      from: "sender@example.com", to: "replies@example.com", subject: "Bounce me"
+  end
+
+  test "bouncing with a reply" do
+    perform_enqueued_jobs only: ActionMailer::DeliveryJob do
+      BouncingWithReplyMailbox.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