Improve PHPunit tests and migrate CI to GitHub actions.

.github/workflows/phpunit-tests.yml

@@ -0,0 +1,46 @@
+name: PHPUnit Tests
+
+on:
+  push:
+    branches: master
+    paths:
+      - '**.php'
+      - 'phpunit.xml.dist'
+      - '**.neon'
+      - 'composer.json'
+      - '.github/workflows/phpunit-tests.yml'
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '**.php'
+      - 'phpunit.xml.dist'
+      - '**.neon'
+      - 'composer.json'
+      - '.github/workflows/phpunit-tests.yml'
+  workflow_dispatch:
+
+jobs:
+  testing:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-version: [7.4, 8.4]
+
+    steps:
+      - name: Check out the source code
+        uses: actions/checkout@v4
+
+      - name: Set up PHP ${{ matrix.php-version }}
+        uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          php-version: ${{ matrix.php-version }}
+
+      - name: Install PHP Dependencies
+        uses: ramsey/composer-install@v3
+        with:
+          dependency-versions: 'highest'
+
+      - name: Run PHPUnit tests
+        run: composer test

composer.json

@@ -8,14 +8,15 @@
 		"szepeviktor/phpstan-wordpress": "^1.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^7 || ^9"
+		"phpunit/phpunit": "^7 || ^9",
+		"wpsyntex/polylang-stubs": "dev-master"
 	},
 	"autoload": {
 		"psr-4": {
 			"WPSyntex\\Polylang\\PHPStan\\": "src/"
 		}
 	},
 	"scripts": {
-		"test":"vendor/bin/phpunit"
+		"test":"vendor/bin/phpunit -d memory_limit=1G"
 	}
 }

tests/DynamicReturnTypeExtensionTest.php

@@ -29,7 +29,7 @@ public function testFileAsserts(string $assertType, string $file, ...$args): voi
 
 	public static function getAdditionalConfigFiles(): array
 	{
-		// path to your project's phpstan.neon, or extension.neon in case of custom extension packages
+		// phpstan.neon or extension.neon use relative paths, so we need to use a fake vendor directory regarding szepeviktor/phpstan-wordpress dependency.
 		return [dirname(__DIR__) . '/vendor/wpsyntex/polylang-phpstan/extension.neon'];
 	}
 }

tests/bootstrap.php

@@ -11,11 +11,9 @@
 if (! is_dir($helperDirectory)) {
 	mkdir($helperDirectory, 0777, true);
 }
-if ( ! file_exists( $helperDirectory . '/extension.neon' ) ) {
-	copy(dirname(__DIR__) . '/extension.neon', $helperDirectory . '/extension.neon');
-}
-if ( ! file_exists( $helperDirectory . '/bootstrap.php' ) ) {
-	copy(dirname(__DIR__) . '/bootstrap.php', $helperDirectory . '/bootstrap.php');
-}
+
+// Copy package to a fake vendor directory.
+copy(dirname(__DIR__) . '/extension.neon', $helperDirectory . '/extension.neon');
+copy(dirname(__DIR__) . '/bootstrap.php', $helperDirectory . '/bootstrap.php');
 
 require_once dirname(__DIR__) . '/vendor/autoload.php';