Test ServiceWiring.php

Test ServiceWiring.php using tests copied from CentralAuth. Because
phpunit does not support marking a file as covered, the ServiceWiring
file is ignored for code coverage as the tests fully cover the file.

Change-Id: I7da8d74fec84a5aa9c77bc0678ad8f55b550893a

includes/ServiceWiring.php

@@ -4,6 +4,11 @@ namespace MediaWiki\Extension\DiscussionTools;
 
 use MediaWiki\MediaWikiServices;
 
+// PHP unit does not understand code coverage for this file
+// as the @covers annotation cannot cover a specific file
+// This is fully tested in ServiceWiringTest.php
+// @codeCoverageIgnoreStart
+
 return [
 	'DiscussionTools.CommentParser' => static function ( MediaWikiServices $services ): CommentParser {
 		return new CommentParser(
@@ -48,3 +53,5 @@ return [
 		);
 	},
 ];
+
+// @codeCoverageIgnoreEnd

tests/phpunit/ServiceWiringTest.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * Copy of CentralAuth's CentralAuthServiceWiringTest.php
+ * used to test the ServiceWiring.php file.
+ */
+
+namespace MediaWiki\Extension\DiscussionTools\Tests;
+
+use MediaWiki\MediaWikiServices;
+
+/**
+ * Tests ServiceWiring.php
+ *
+ * @coversNothing PHPUnit does not support covering annotations for files
+ * @group DiscussionTools
+ */
+class ServiceWiringTest extends IntegrationTestCase {
+	/**
+	 * @dataProvider provideService
+	 */
+	public function testService( string $name ) {
+		MediaWikiServices::getInstance()->get( $name );
+		$this->addToAssertionCount( 1 );
+	}
+
+	public function provideService() {
+		$wiring = require __DIR__ . '/../../includes/ServiceWiring.php';
+		foreach ( $wiring as $name => $_ ) {
+			yield $name => [ $name ];
+		}
+	}
+}