[ActiveJob] extract JobBuffer from helper

activejob/test/helper.rb

@@ -28,23 +28,3 @@ def ruby_193?
 require 'active_support/testing/autorun'
 
 ActiveJob::Base.logger.level = Logger::DEBUG
-
-module JobBuffer
-  class << self
-    def clear
-      @buffer = []
-    end
-
-    def add(value)
-      @buffer << value
-    end
-
-    def values
-      @buffer
-    end
-
-    def last_value
-      @buffer.last
-    end
-  end
-end

activejob/test/jobs/gid_job.rb

@@ -1,3 +1,5 @@
+require_relative '../support/job_buffer'
+
 class GidJob < ActiveJob::Base
   def perform(person)
     JobBuffer.add("Person with ID: #{person.id}")

activejob/test/jobs/hello_job.rb

@@ -1,3 +1,5 @@
+require_relative '../support/job_buffer'
+
 class HelloJob < ActiveJob::Base
   def perform(greeter = "David")
     JobBuffer.add("#{greeter} says hello")

activejob/test/jobs/rescue_job.rb

@@ -1,3 +1,5 @@
+require_relative '../support/job_buffer'
+
 class RescueJob < ActiveJob::Base
   class OtherError < StandardError; end
 

activejob/test/support/job_buffer.rb

@@ -0,0 +1,19 @@
+module JobBuffer
+  class << self
+    def clear
+      values.clear
+    end
+
+    def add(value)
+      values << value
+    end
+
+    def values
+      @values ||= []
+    end
+
+    def last_value
+      values.last
+    end
+  end
+end