Add workflow file for unit tests

.github/workflows/tests.yml

@@ -0,0 +1,57 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - master
+      - change/jiraProjectKey
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  mysql-tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - php: '7.1'
+          - php: '7.2'
+          - php: '7.3'
+          - php: '7.4'
+
+    name: PHP ${{ matrix.php }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: dom, curl, libxml, mbstring, zip, pcntl, intl, gd, exif, iconv, mysqli, pdo, pdo_mysql, ldap
+          coverage: none
+
+      - name: Get Composer Cache Directory
+        id: composer-cache
+        env:
+          PHP_VERSION: ${{ matrix.php }}
+        run: |
+          echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+      - name: Cache Composer dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: composer-${{ matrix.php }}-${{ hashFiles('composer.lock') }}
+
+      - name: Setup composer dependencies
+        env:
+          PHP_VERSION: ${{ matrix.php }}
+        run: |
+          php composer.phar install
+
+      - name: Run unit tests
+        run: |
+          vendor/bin/phpunit --verbose --stop-on-error