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.github/workflows/test.yml

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+name: Tests
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-versions: 
+          - '5.5'
+          - '5.6'
+          - '7.0'
+          - '7.1'
+          - '7.2'
+          # - '8.0'
+          # - '8.1'
+          # - '8.2'
+          # - '8.3'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          ini-values:  zend.assertions=1,  assert.exception=1
+
+      - name: Validate composer.json
+        run: composer validate --strict
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v4
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ matrix.php-versions }}-${{ hashFiles('composer.json') }}
+          restore-keys: |
+            ${{ runner.os }}-php-${{ matrix.php-versions }}
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+
+      - name: Run the unit tests
+        run: |
+          vendor/bin/phpunit tests/
+
+    services:
+      redis:
+        image: redis:7.4
+        ports:
+          - 6379:6379