Add GitHub Actions workflow for unit tests

.github/workflows/unit-tests.yml

@@ -0,0 +1,123 @@
+name: Unit Tests
+
+on:
+  push:
+    branches: [ trunk ]
+  pull_request:
+    branches: [ trunk ]
+
+jobs:
+  # Standalone PHP tests — no WordPress or database dependency.
+  php-standalone:
+    name: "PHP: ${{ matrix.name }}"
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: Serve Happy API
+            working-directory: api.wordpress.org/public_html/core/serve-happy/1.0
+            phpunit-args: "--configuration phpunit.xml --exclude-group serve-happy-live-http"
+            bootstrap: compat
+          - name: Browse Happy API
+            working-directory: api.wordpress.org/public_html/core/browse-happy/1.0
+            phpunit-args: "--configuration phpunit.xml"
+            bootstrap: none
+          - name: Slack Trac Bot
+            working-directory: common/includes/tests/slack/trac
+            phpunit-args: "bot.php"
+            bootstrap: compat
+          - name: Slack Props Library
+            working-directory: common/includes/slack/props/tests
+            phpunit-args: "."
+            bootstrap: wpdb-stub
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "8.0"
+          tools: phpunit:^9
+
+      - name: Create PHPUnit compatibility bootstrap
+        if: matrix.bootstrap == 'compat'
+        run: |
+          cat > /tmp/phpunit-bootstrap.php << 'PHPEOF'
+          <?php
+          // Polyfill for tests using the pre-PHPUnit 8 class name.
+          if ( ! class_exists( 'PHPUnit_Framework_TestCase' ) && class_exists( 'PHPUnit\Framework\TestCase' ) ) {
+              class_alias( 'PHPUnit\Framework\TestCase', 'PHPUnit_Framework_TestCase' );
+          }
+          PHPEOF
+
+      - name: Create wpdb stub bootstrap
+        if: matrix.bootstrap == 'wpdb-stub'
+        run: |
+          cat > /tmp/phpunit-bootstrap.php << 'PHPEOF'
+          <?php
+          // Stub for $wpdb used by PHPUnit's createStub() in the props tests.
+          class wpdbStub {
+              public function prepare( $query, ...$args ) { return $query; }
+              public function get_results( $query, $output = 'OBJECT' ) { return []; }
+          }
+          PHPEOF
+
+      - name: Run PHPUnit
+        working-directory: ${{ matrix.working-directory }}
+        run: |
+          if [ "${{ matrix.bootstrap }}" != "none" ]; then
+            phpunit --bootstrap /tmp/phpunit-bootstrap.php ${{ matrix.phpunit-args }}
+          else
+            phpunit ${{ matrix.phpunit-args }}
+          fi
+
+  # WordPress-dependent PHP tests — require the WP test framework and MySQL.
+  php-wordpress:
+    name: "WP PHP: ${{ matrix.name }}"
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:8.0
+        env:
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_DATABASE: wordpress_test
+        ports:
+          - 3306:3306
+        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: Handbook Plugin
+            working-directory: wordpress.org/public_html/wp-content/plugins/handbook
+            phpunit-args: "--configuration phpunit.xml.dist"
+          - name: Plugin Directory
+            working-directory: wordpress.org/public_html/wp-content/plugins/plugin-directory
+            phpunit-args: "--configuration phpunit.xml --group plugin-directory"
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "8.0"
+          extensions: mysqli
+          tools: phpunit:^9
+
+      - name: Install WordPress test suite
+        run: |
+          git clone --depth=1 https://github.com/WordPress/wordpress-develop.git /tmp/wp-develop
+          cd /tmp/wp-develop && composer install --no-interaction
+          cp wp-tests-config-sample.php tests/phpunit/wp-tests-config.php
+          sed -i "s|dirname( __FILE__ ) . '/src/'|'/tmp/wp-develop/src/'|" tests/phpunit/wp-tests-config.php
+          sed -i "s/youremptytestdbnamehere/wordpress_test/" tests/phpunit/wp-tests-config.php
+          sed -i "s/yourusernamehere/root/" tests/phpunit/wp-tests-config.php
+          sed -i "s/yourpasswordhere/root/" tests/phpunit/wp-tests-config.php
+          sed -i "s/'localhost'/'127.0.0.1'/" tests/phpunit/wp-tests-config.php
+
+      - name: Run PHPUnit
+        working-directory: ${{ matrix.working-directory }}
+        env:
+          WP_TESTS_DIR: /tmp/wp-develop/tests/phpunit
+        run: phpunit ${{ matrix.phpunit-args }}

api.wordpress.org/public_html/core/browse-happy/1.0/tests/phpunit/tests/browse-happy.php

@@ -853,6 +853,12 @@ function test_upgrade_browsers( $header ) {
 			return;
 		}
 
+		// Internet Explorer is always flagged as needing an upgrade.
+		if ( 'Internet Explorer' === $parsed['name'] ) {
+			$this->assertTrue( $parsed['upgrade'] );
+			return;
+		}
+
 		$versions = get_browser_current_versions();
 
 		if ( ! empty( $versions[ $parsed['name'] ] ) ) {

wordpress.org/public_html/wp-content/plugins/handbook/phpunit/bootstrap.php

@@ -14,6 +14,10 @@
 if ( ! $_tests_dir && false !== ( $pos = stripos( __FILE__, '/src/wp-content/plugins/' ) ) ) {
 	$_tests_dir = substr( __FILE__, 0, $pos ) . '/tests/phpunit/';
 }
+// Check for wp-env test directory.
+elseif ( ! $_tests_dir && file_exists( '/wordpress-phpunit/includes/functions.php' ) ) {
+	$_tests_dir = '/wordpress-phpunit/';
+}
 // Elseif no path yet, assume a temp directory path.
 elseif ( ! $_tests_dir ) {
 	$_tests_dir = rtrim( sys_get_temp_dir(), '/\\' ) . '/wordpress-tests-lib/tests/phpunit/';

wordpress.org/public_html/wp-content/plugins/handbook/phpunit/tests/handbook.php

@@ -17,15 +17,15 @@ class WPorg_Handbook_Handbook_Test extends WP_UnitTestCase {
 
 	protected $handbook;
 
-	public function setUp() {
+	public function setUp(): void {
 		parent::setup();
 		WPorg_Handbook_Init::init();
 
 		$handbooks = WPorg_Handbook_Init::get_handbook_objects();
 		$this->handbook = reset( $handbooks );
 	}
 
-	public function tearDown() {
+	public function tearDown(): void {
 		parent::tearDown();
 
 		foreach ( WPorg_Handbook_Init::get_handbook_objects() as $obj ) {
@@ -455,7 +455,7 @@ public function test_handbook_sidebar() {
 
 		$this->assertTrue( isset( $wp_registered_sidebars[ 'handbook' ] ) );
 		$this->assertSame(
-			[ 'name', 'id', 'description', 'class', 'before_widget', 'after_widget', 'before_title', 'after_title', 'before_sidebar', 'after_sidebar' ],
+			[ 'name', 'id', 'description', 'class', 'before_widget', 'after_widget', 'before_title', 'after_title', 'before_sidebar', 'after_sidebar', 'show_in_rest' ],
 			array_keys( $wp_registered_sidebars[ 'handbook' ] )
 		);
 		$this->assertEquals( 'handbook', $wp_registered_sidebars[ 'handbook' ]['id'] );

wordpress.org/public_html/wp-content/plugins/handbook/phpunit/tests/init.php

@@ -4,13 +4,13 @@
 
 class WPorg_Handbook_Init_Test extends WP_UnitTestCase {
 
-	public function setUp() {
+	public function setUp(): void {
 		parent::setup();
 
 		WPorg_Handbook_Init::init();
 	}
 
-	public function tearDown() {
+	public function tearDown(): void {
 		parent::tearDown();
 
 		WPorg_Handbook_Init::reset( true );

wordpress.org/public_html/wp-content/plugins/handbook/phpunit/tests/template-tags.php

@@ -4,13 +4,13 @@
 
 class WPorg_Handbook_Template_Tags_Test extends WP_UnitTestCase {
 
-	public function setUp() {
+	public function setUp(): void {
 		parent::setup();
 
 		WPorg_Handbook_Init::init();
 	}
 
-	public function tearDown() {
+	public function tearDown(): void {
 		parent::tearDown();
 
 		WPorg_Handbook_Init::reset( true );

wordpress.org/public_html/wp-content/plugins/plugin-directory/.wp-env.json

@@ -0,0 +1,16 @@
+{
+	"core": "WordPress/WordPress#master",
+	"plugins": [
+		".",
+		"https://downloads.wordpress.org/plugin/jetpack.latest-stable.zip",
+		"https://downloads.wordpress.org/plugin/advanced-post-cache.latest-stable.zip",
+		"https://github.com/WordPress/plugin-check"
+	],
+	"themes": [
+		"../../../themes/pub/wporg-plugins-2024",
+		"https://github.com/WordPress/wporg-parent-2021"
+	],
+	"mappings": {
+		"wp-content/mu-plugins/wporg-ratings-stub.php": "./tests/stubs/wporg-ratings-stub.php"
+	}
+}

wordpress.org/public_html/wp-content/plugins/plugin-directory/tests/bootstrap.php

@@ -6,6 +6,29 @@
 	return;
 }
 
+// Find the WordPress PHPUnit test framework.
+$_tests_dir = getenv( 'WP_TESTS_DIR' );
+
+if ( ! $_tests_dir ) {
+	// wp-env test directory.
+	if ( file_exists( '/wordpress-phpunit/includes/functions.php' ) ) {
+		$_tests_dir = '/wordpress-phpunit/';
+	} else {
+		$_tests_dir = rtrim( sys_get_temp_dir(), '/\\' ) . '/wordpress-tests-lib/tests/phpunit/';
+	}
+}
+
+if ( ! file_exists( $_tests_dir . '/includes/functions.php' ) ) {
+	echo "Could not find {$_tests_dir}/includes/functions.php\n";
+	exit( 1 );
+}
+
+// Give access to tests_add_filter() function.
+require_once $_tests_dir . '/includes/functions.php';
+
+// Load Jetpack Search stub if Jetpack is not installed.
+require_once __DIR__ . '/stubs/jetpack-search-stub.php';
+
 /**
  * Manually load the plugin being tested.
  */
@@ -14,3 +37,6 @@ function manually_load_plugin() {
 }
 
 tests_add_filter( 'muplugins_loaded', __NAMESPACE__ . '\manually_load_plugin' );
+
+// Start up the WP testing environment.
+require $_tests_dir . '/includes/bootstrap.php';

wordpress.org/public_html/wp-content/plugins/plugin-directory/tests/phpunit/tests/test-markdown.php

@@ -0,0 +1,132 @@
+<?php
+
+use WordPressdotorg\Plugin_Directory\Markdown;
+
+/**
+ * @group plugin-directory
+ * @group markdown
+ */
+class Tests_Markdown extends WP_UnitTestCase {
+
+	function test_transform_basic_paragraph(): void {
+		$md     = new Markdown();
+		$result = $md->transform( 'Hello World' );
+		$this->assertSame( '<p>Hello World</p>', $result );
+	}
+
+	function test_transform_empty_string(): void {
+		$md     = new Markdown();
+		$result = $md->transform( '' );
+		$this->assertSame( '', $result );
+	}
+
+	function test_transform_trims_output(): void {
+		$md     = new Markdown();
+		$result = $md->transform( "  \n  Hello  \n  " );
+		$this->assertSame( $result, trim( $result ) );
+	}
+
+	/**
+	 * Test the custom `= Section Title =` header syntax.
+	 *
+	 * This is WordPress plugin readme specific — converts `= Title =` to <h4>.
+	 */
+	function test_transform_equals_header(): void {
+		$md     = new Markdown();
+		$result = $md->transform( '= Section Title =' );
+		$this->assertStringContainsString( '<h4>Section Title</h4>', $result );
+	}
+
+	function test_transform_multiple_equals_headers(): void {
+		$md     = new Markdown();
+		$result = $md->transform( "= First =\n\nContent\n\n= Second =" );
+		$this->assertStringContainsString( '<h4>First</h4>', $result );
+		$this->assertStringContainsString( '<h4>Second</h4>', $result );
+	}
+
+	function test_equals_header_with_leading_whitespace(): void {
+		$md     = new Markdown();
+		$result = $md->transform( '  = Indented Header =' );
+		$this->assertStringContainsString( '<h4>Indented Header</h4>', $result );
+	}
+
+	/**
+	 * Test code_trick: <pre><code> blocks preserve underscores in code.
+	 *
+	 * This is custom logic in Markdown::code_trick() — pre-existing HTML code blocks
+	 * are converted to backtick format before markdown processing, so markdown
+	 * does not mangle underscores and other special characters inside code.
+	 *
+	 * The block needs surrounding content so trim() does not strip indentation.
+	 */
+	function test_code_trick_preserves_underscores_in_pre_code(): void {
+		$md    = new Markdown();
+		$input = "Some text before.\n\n<pre><code>\$my_var = some_function();\n\$other_var = 1;</code></pre>\n\nSome text after.";
+		$result = $md->transform( $input );
+
+		// Underscores should NOT be converted to <em> tags inside code blocks.
+		$this->assertStringNotContainsString( '<em>', $result );
+		$this->assertStringContainsString( 'my_var', $result );
+		$this->assertStringContainsString( 'some_function', $result );
+	}
+
+	function test_code_trick_inline_code_preserves_underscores(): void {
+		$md     = new Markdown();
+		$input  = "Use <code>my_var_name</code> for the setting.";
+		$result = $md->transform( $input );
+
+		// Inline code should also preserve underscores.
+		$this->assertStringNotContainsString( '<em>', $result );
+		$this->assertStringContainsString( 'my_var_name', $result );
+	}
+
+	/**
+	 * Test code_trick: bbPress-style backtick code blocks at line start are
+	 * converted to indented code (4 spaces) for markdown processing.
+	 */
+	function test_code_trick_bbpress_backtick_block(): void {
+		$md     = new Markdown();
+		$input  = "Some text.\n\n`some_code_here`\n\nMore text.";
+		$result = $md->transform( $input );
+
+		$this->assertStringContainsString( 'some_code_here', $result );
+	}
+
+	/**
+	 * Test that inline markdown code (backticks) in mid-line is preserved.
+	 */
+	function test_inline_backtick_code_preserved(): void {
+		$md     = new Markdown();
+		$result = $md->transform( 'Use `add_filter()` to modify output.' );
+		$this->assertStringContainsString( '<code>add_filter()</code>', $result );
+	}
+
+	/**
+	 * Test standard markdown features (these verify the upstream MarkdownExtra
+	 * library works correctly through our transform() wrapper).
+	 */
+	function test_transform_bold(): void {
+		$md     = new Markdown();
+		$result = $md->transform( '**bold text**' );
+		$this->assertStringContainsString( '<strong>bold text</strong>', $result );
+	}
+
+	function test_transform_italic(): void {
+		$md     = new Markdown();
+		$result = $md->transform( '*italic text*' );
+		$this->assertStringContainsString( '<em>italic text</em>', $result );
+	}
+
+	function test_transform_link(): void {
+		$md     = new Markdown();
+		$result = $md->transform( '[Example](https://example.com)' );
+		$this->assertStringContainsString( '<a href="https://example.com">Example</a>', $result );
+	}
+
+	function test_transform_unordered_list(): void {
+		$md     = new Markdown();
+		$result = $md->transform( "* Item 1\n* Item 2\n* Item 3" );
+		$this->assertStringContainsString( '<li>Item 1</li>', $result );
+		$this->assertStringContainsString( '<ul>', $result );
+	}
+}