Changed: Use #prepend over #alias_method for Thread plugin. (#1018)

Author: delner

lib/rollbar/plugins/thread.rb

@@ -1,13 +1,14 @@
 Rollbar.plugins.define('thread') do
-  execute do
-    Thread.class_eval do
-      def initialize_with_rollbar(*args, &block)
+  module Rollbar
+    module ThreadPlugin
+      def initialize(*args)
         self[:_rollbar_notifier] ||= Rollbar.notifier.scope
-        initialize_without_rollbar(*args, &block)
+        super
       end
-
-      alias_method :initialize_without_rollbar, :initialize
-      alias_method :initialize, :initialize_with_rollbar
     end
   end
+
+  execute do
+    Thread.send(:prepend, Rollbar::ThreadPlugin) # rubocop:disable Lint/SendWithMixinArgument
+  end
 end

spec/rollbar/plugins/thread_spec.rb

@@ -0,0 +1,11 @@
+require 'spec_helper'
+
+Rollbar.plugins.load!
+
+describe Rollbar::ThreadPlugin do
+  subject(:thread) { Thread.new {} }
+
+  it 'has a Rollbar notifier' do
+    expect(thread[:_rollbar_notifier]).to be_a_kind_of(Rollbar::Notifier)
+  end
+end