Test with rails main

.github/workflows/rails_main_testing.yml

@@ -0,0 +1,26 @@
+name: Test against Rails main
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # Run every day at 00:00 UTC
+  workflow_dispatch:
+  push:
+
+jobs:
+  specs:
+    name: Ruby${{ matrix.ruby }} rails_main test
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - '3.3'
+    env:
+      BUNDLE_GEMFILE: gemfiles/rails_main.gemfile
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - run: bundle exec rake test

.gitignore

@@ -19,3 +19,4 @@ pkg
 mkmf.log
 .bundle/config
 .bundle/environment.rb
+/gemfiles/rails_main.gemfile.lock

gemfiles/rails_main.gemfile

@@ -0,0 +1,6 @@
+source "https://rubygems.org"
+
+gem 'activerecord', github: 'rails/rails', branch: 'main'
+gem "sqlite3", "~> 1.4"
+
+gemspec path: ".."