test: add an integration suite running against wordpress and woocommerce

.github/workflows/phpunit.yml

@@ -0,0 +1,62 @@
+name: PHPUnit
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  php-matrix:
+    name: PHP matrix
+    runs-on: ubuntu-latest
+    outputs:
+      versions: ${{ steps.php-matrix.outputs.versions }}
+    steps:
+      - uses: actions/checkout@v5
+
+      - uses: typisttech/php-matrix-action@0545a7d54db2c7be158b615b1e7f458ae6e99ad3 # v3.0.2
+        id: php-matrix
+
+  phpunit:
+    name: PHPUnit (PHP ${{ matrix.php }})
+    needs: php-matrix
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ${{ fromJSON(needs.php-matrix.outputs.versions) }}
+    services:
+      mariadb:
+        image: mariadb:11
+        env:
+          MARIADB_ROOT_PASSWORD: root
+          MARIADB_DATABASE: wordpress_test
+        ports:
+          - 3306:3306
+        options: >-
+          --health-cmd="healthcheck.sh --connect --innodb_initialized"
+          --health-interval=5s
+          --health-timeout=5s
+          --health-retries=10
+    env:
+      WP_TESTS_DB_HOST: 127.0.0.1
+      WP_TESTS_DB_NAME: wordpress_test
+      WP_TESTS_DB_USER: root
+      WP_TESTS_DB_PASSWORD: root
+    steps:
+      - uses: actions/checkout@v5
+
+      - uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # 2.37.2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: mysqli
+          coverage: none
+          tools: composer
+
+      - uses: ramsey/composer-install@a8d0d959dab41457692a5e2041bd9b757a119e3f # 3.2.1
+
+      - run: composer test

.gitignore

@@ -2,3 +2,4 @@
 languages/*.mo
 /vendor/
 /vendor-bin/*/vendor/
+/.phpunit.result.cache

composer.json

@@ -3,35 +3,66 @@
     "description": "WordPress theme for the LibreSign SaaS",
     "type": "wordpress-theme",
     "license": "GPL-2.0-or-later",
+    "repositories": [
+        {
+            "type": "composer",
+            "url": "https://wpackagist.org",
+            "only": [
+                "wpackagist-plugin/*"
+            ]
+        }
+    ],
     "require": {
         "php": ">=8.3 <8.6"
     },
     "require-dev": {
-        "bamarni/composer-bin-plugin": "^1.8"
+        "bamarni/composer-bin-plugin": "^1.8",
+        "composer/installers": "^2.3",
+        "roots/wordpress": "^7.0",
+        "wp-phpunit/wp-phpunit": "^7.0",
+        "wpackagist-plugin/woocommerce": "^11.0"
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "LibreSign\\WordPressTheme\\Tests\\": "tests/"
+        }
     },
     "config": {
         "platform": {
             "php": "8.3"
         },
         "allow-plugins": {
-            "bamarni/composer-bin-plugin": true
+            "bamarni/composer-bin-plugin": true,
+            "composer/installers": true,
+            "roots/wordpress-core-installer": true
         }
     },
     "extra": {
         "bamarni-bin": {
             "bin-links": true,
             "forward-command": true
+        },
+        "wordpress-install-dir": "vendor/wordpress",
+        "installer-paths": {
+            "vendor/test-plugins/{$name}/": [
+                "type:wordpress-plugin"
+            ]
         }
     },
     "scripts": {
         "lint": "parallel-lint --exclude vendor --exclude vendor-bin .",
         "cs": "phpcs",
         "cs:fix": "phpcbf",
         "stan": "phpstan analyse --memory-limit=2G",
+        "test": [
+            "@test:integration"
+        ],
+        "test:integration": "phpunit -c phpunit-integration.xml.dist",
         "ci": [
             "@lint",
             "@cs",
-            "@stan"
+            "@stan",
+            "@test"
         ]
     }
 }