Add an integration spec showing forwardable regression

Author: scpike

Gemfile

@@ -29,6 +29,7 @@ group :development, :test do
 
   gem 'mongoid-compatibility'
   gem 'mongoid-danger', '~> 0.2.0'
+  gem 'mongoid-history'
   gem 'rspec', '~> 3.9'
   gem 'rubocop', '0.81.0'
   gem 'rubocop-rspec', '1.38.1'

spec/integration/mongoid-history/mongoid_history_spec.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require 'mongoid-history'
+
+# This replicates the exception reported at https://github.com/mongoid/mongoid-history/issues/238#issuecomment-1063155193
+# when mongoid-locker required 'forwardable' instead of relying on the
+# active support-provided delegation method
+RSpec.describe 'MongoidHistory' do # rubocop:disable RSpec/DescribeClass
+  # rubocop:disable RSpec/ExampleLength
+  it 'does not raise an exception' do
+    expect do
+      Class.new do
+        include Mongoid::Document
+        include Mongoid::Locker
+        include Mongoid::History::Trackable
+
+        field :title
+
+        track_history on: [:title]
+      end
+    end.not_to raise_exception
+  end
+  # rubocop:enable RSpec/ExampleLength
+end

spec/spec_helper.rb

@@ -2,6 +2,8 @@
 
 ENV['RACK_ENV'] = 'test'
 
+require 'logger' # Required for compatibility with activesupport 7
+
 if ENV['COVERAGE']
   require 'simplecov'
   require 'simplecov_json_formatter'