tweaks to github actions testing (for 7.0, 7.1, 7.2, 8.0)

.github/workflows/testing.yml

@@ -1,21 +1,25 @@
 name: RSpec Test Matrix
-on: push
+on:
+  push:
+  pull_request:
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        rails: ['~> 7.1.0', '~> 7.0.0']
-        ruby: ['3.1', '3.2', '3.3']
+        rails: ["7.0", "7.1", "7.2", "8.0"]
+        ruby: ["3.1", "3.2", "3.3"]
     env:
-      RAILS_VERSION: ${{ matrix.rails }}
+      BUNDLE_GEMFILE: "spec/gemfiles/rails_${{ matrix.rails }}.gemfile"
     steps:
       - uses: actions/checkout@v4
+
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true # install gems and cache
 
       - run: bundle install
       - run: bundle exec rspec

Gemfile

@@ -1,8 +1,3 @@
 source 'https://rubygems.org'
 
-# Specify your gem's dependencies in active_record_union.gemspec
-gemspec
-
-gem 'rails', ENV.fetch('RAILS_VERSION')
-gem 'pg'
-gem 'sqlite3', '~> 1.3'
+eval_gemfile File.expand_path('./rails_8.0.gemfile', __dir__)

rails_7.0.gemfile

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in active_record_union.gemspec
+gemspec
+
+gem 'rails', '~> 7.0.0'
+
+# https://github.com/rails/rails/blob/v7.0.2/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb#L13
+gem 'sqlite3', '~> 1.4'
+
+# https://github.com/rails/rails/blob/v7.0.2/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb#L4
+gem 'pg', '~> 1.1'
+
+# https://github.com/rails/rails/blob/v7.0.2/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb#L6
+gem 'mysql2', '~> 0.5'

rails_7.1.gemfile

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in active_record_union.gemspec
+gemspec
+
+gem 'rails', '~> 7.1.0'
+
+# https://github.com/rails/rails/blob/v7.1.2/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb#L13
+gem 'sqlite3', '~> 1.4'
+
+# https://github.com/rails/rails/blob/v7.1.2/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb#L4
+gem 'pg', '~> 1.1'
+
+# https://github.com/rails/rails/blob/v7.1.2/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb#L6
+gem 'mysql2', '~> 0.5'

rails_7.2.gemfile

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in active_record_union.gemspec
+gemspec
+
+gem 'rails', '~> 7.2.0'
+
+# https://github.com/rails/rails/blob/v7.2.0/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb#L13
+gem 'sqlite3', '>= 1.4'
+
+# https://github.com/rails/rails/blob/v7.2.0/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb#L4
+gem 'pg', '~> 1.1'
+
+# https://github.com/rails/rails/blob/v7.2.0/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb#L6
+gem 'mysql2', '~> 0.5'

rails_8.0.gemfile

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in active_record_union.gemspec
+gemspec
+
+gem 'rails', '~> 8.0.0'
+
+# https://github.com/rails/rails/blob/main/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb#L13
+gem 'sqlite3', '>= 2.1'
+
+# https://github.com/rails/rails/blob/main/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb#L4
+gem 'pg', '~> 1.1'
+
+# https://github.com/rails/rails/blob/main/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb#L6
+gem 'mysql2', '~> 0.5'