Improve code and examples

examples/yii2-mysql.yml

@@ -0,0 +1,60 @@
+name: Testing Yii2 with MySQL
+on: [push, pull_request]
+jobs:
+  laravel:
+    name: Yii2 (PHP ${{ matrix.php-versions }})
+    runs-on: ubuntu-latest
+    env:
+      DB_USERNAME: root
+      DB_PASSWORD: yii
+      TEST_DB_USERNAME: root
+      TEST_DB_PASSWORD: yii
+      DB_CHARSET: utf8
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ALLOW_EMPTY_PASSWORD: false
+          MYSQL_ROOT_PASSWORD: yii
+          MYSQL_DATABASE: yii
+        ports:
+          - 3306
+        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+    strategy:
+      fail-fast: false
+      max-parallel: 3
+      matrix:
+        php-versions: ['7.2', '7.3', '7.4']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Set Node.js 10.x
+        uses: actions/setup-node@master
+        with:
+          version: 10.x
+      - name: Setup PHP, with composer and extensions
+        uses: shivammathur/setup-php@master #https://github.com/shivammathur/setup-php
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extension-csv: mbstring, intl, gd, imagick, zip, dom, mysql
+          coverage: xdebug #optional
+      - name: Install Composer dependencies
+        run: composer install --no-progress --no-suggest --prefer-dist --optimize-autoloader
+      - name: Prepare the application
+        run: |
+          php -r "file_exists('.env') || copy('.env.dist', '.env');"
+          php console/yii app/setup
+          npm install --development
+          npm run build
+        env:
+          DB_DSN: mysql:host=127.0.0.1;port=${{ job.services.mysql.ports['3306'] }};dbname=yii
+          TEST_DB_DSN: mysql:host=127.0.0.1;port=${{ job.services.mysql.ports['3306'] }};dbname=yii
+      - name: Run Tests
+        run: |
+          vendor/bin/codecept build
+          php tests/bin/yii app/setup --interactive=0
+          nohup php -S localhost:8080 > yii.log 2>&1 &
+          vendor/bin/codecept run
+        env:
+          DB_DSN: mysql:host=127.0.0.1;port=${{ job.services.mysql.ports['3306'] }};dbname=yii
+          TEST_DB_DSN: mysql:host=127.0.0.1;port=${{ job.services.mysql.ports['3306'] }};dbname=yii