Added queue_name_delimiter attribute.

- Added ActiveJob::Base#queue_name_delimiter to allow for
  developers using ActiveJob to change the delimiter from the default
  ('_') to whatever else they may be using (e.g., '.', '-', ...).

- Updated source guide to include a blurb about the delimiter.

1 files changed, 18 insertions, 1 deletions

diff --git a/activejob/test/cases/queue_naming_test.rb b/activejob/test/cases/queue_naming_test.rb
index 886f41271a..898016a704 100644
--- a/activejob/test/cases/queue_naming_test.rb
+++ b/activejob/test/cases/queue_naming_test.rb
@@ -64,7 +64,7 @@ class QueueNamingTest < ActiveSupport::TestCase
     end
   end
 
-  test 'queu_name_prefix prepended to the queue name' do
+  test 'queue_name_prefix prepended to the queue name with default delimiter' do
     original_queue_name_prefix = ActiveJob::Base.queue_name_prefix
     original_queue_name = HelloJob.queue_name
 
@@ -78,6 +78,23 @@ class QueueNamingTest < ActiveSupport::TestCase
     end
   end
 
+  test 'queue_name_prefix prepended to the queue name with custom delimiter' do
+    original_queue_name_prefix = ActiveJob::Base.queue_name_prefix
+    original_queue_name_delimiter = ActiveJob::Base.queue_name_delimiter
+    original_queue_name = HelloJob.queue_name
+
+    begin
+      ActiveJob::Base.queue_name_delimiter = '.'
+      ActiveJob::Base.queue_name_prefix = 'aj'
+      HelloJob.queue_as :low
+      assert_equal 'aj.low', HelloJob.queue_name
+    ensure
+      ActiveJob::Base.queue_name_prefix = original_queue_name_prefix
+      ActiveJob::Base.queue_name_delimiter = original_queue_name_delimiter
+      HelloJob.queue_name = original_queue_name
+    end
+  end
+
   test 'uses queue passed to #set' do
     job = HelloJob.set(queue: :some_queue).perform_later
     assert_equal "some_queue", job.queue_name