Integrate unit tests with github actions

Author: rkunjappan

.github/workflows/pull_request.yml

@@ -31,3 +31,21 @@ jobs:
       - name: Setup tmate session
         if: ${{ github.event.inputs.tmate_enabled == 1 }}
         uses: mxschmitt/action-tmate@v3
+
+  tests:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-version: [8.2, 8.3, 8.4]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+      - name: Composer install
+        run: composer install
+      - name: Run tests
+        run: vendor/bin/phpunit -c phpunit.xml

composer.json

@@ -27,7 +27,8 @@
     },
     "require-dev": {
         "drupal/coder": "^8.3",
-        "squizlabs/php_codesniffer": "^3.4"
+        "squizlabs/php_codesniffer": "^3.4",
+        "phpunit/phpunit": "^12.4"
     },
     "scripts": {
         "codesniff": [
@@ -39,6 +40,9 @@
             "vendor/bin/phpcbf . --ignore=vendor src"
         ],
         "code:lint": "find src -name '*.php' -print0 | xargs -0 -n1 php -l",
+        "code:test" : [
+            "vendor/bin/phpunit -c ./phpunit.xml"
+        ],
         "pre-commit": [
             "composer validate --strict",
             "@codesniff",

phpunit.xml

@@ -0,0 +1,12 @@
+<phpunit
+         beStrictAboutTestsThatDoNotTestAnything="true"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutChangesToGlobalState="true"
+         failOnWarning="true"
+         cacheResult="false">
+  <testsuites>
+    <testsuite name="unit">
+      <directory>./tests/src/</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>