Run tests in Github actions

.github/workflows/main.yml

@@ -0,0 +1,35 @@
+name: Build
+on: [push, pull_request]
+
+jobs:
+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby-version: [3.2.2]
+        database: [mysql]
+    services:
+      mysql:
+        image: mysql:8.0.31
+        env:
+          MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
+        ports:
+          - 33060:3306
+        options: --health-cmd "mysql -h localhost -e \"select now()\"" --health-interval 1s --health-timeout 5s --health-retries 30
+    env:
+      TARGET_DB: ${{ matrix.database }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Setup Ruby and install gems
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
+      - name: Setup test database
+        run: |
+          bin/rails db:setup
+      - name: Run tests
+        run: bin/rails test

Gemfile.lock

@@ -128,6 +128,8 @@ GEM
     nio4r (2.5.9)
     nokogiri (1.15.4-arm64-darwin)
       racc (~> 1.4)
+    nokogiri (1.15.4-x86_64-linux)
+      racc (~> 1.4)
     racc (1.7.1)
     rack (3.0.8)
     rack-session (2.0.0)
@@ -184,6 +186,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-22
+  x86_64-linux
 
 DEPENDENCIES
   debug

test/test_helper.rb

@@ -86,12 +86,18 @@ def signal_process(pid, signal, wait: nil)
     end
 
     def process_exists?(pid)
+      reap_processes
       Process.getpgid(pid)
       true
     rescue Errno::ESRCH
       false
     end
 
+    def reap_processes
+      Process.waitpid(-1, Process::WNOHANG)
+    rescue Errno::ECHILD
+    end
+
     # Allow skipping AR query cache, necessary when running test code in multiple
     # forks. The queries done in the test might be cached and if we don't perform
     # any non-SELECT queries after previous SELECT queries were cached on the connection