Replace use of deprecated ResourceLoaderTestModules hook

Use the new extension.json attribute instead.

Bug: T214211
Change-Id: I79c45c6923fd19f6f9f068492b3bd6548161dd04
Depends-On: I27ecebe27d7aaebe6d1317bc5eaea9cca368b45d

extension.json

@@ -30,9 +30,6 @@
 		"ResourceLoaderGetConfigVars": [
 			"WikiEditorHooks::resourceLoaderGetConfigVars"
 		],
-		"ResourceLoaderTestModules": [
-			"WikiEditorHooks::resourceLoaderTestModules"
-		],
 		"MakeGlobalVariablesScript": [
 			"WikiEditorHooks::makeGlobalVariablesScript"
 		],
@@ -298,6 +295,12 @@
 		"localBasePath": "modules",
 		"remoteExtPath": "WikiEditor/modules"
 	},
+	"QUnitTestModule": {
+		"localBasePath": "",
+		"remoteExtPath": "WikiEditor",
+		"scripts": "tests/qunit/ext.wikiEditor.toolbar.test.js",
+		"dependencies": [ "ext.wikiEditor" ]
+	},
 	"DefaultUserOptions": {
 		"usebetatoolbar": true
 	},

includes/WikiEditorHooks.php

@@ -194,24 +194,6 @@ class WikiEditorHooks {
 		$vars['mw.msg.wikieditor'] = wfMessage( 'sig-text', '~~~~' )->inContentLanguage()->text();
 	}
 
-	/**
-	 * ResourceLoaderTestModules hook
-	 *
-	 * Registers JavaScript test modules
-	 *
-	 * @param array &$testModules array of javascript testing modules. 'qunit' is fed using
-	 * tests/qunit/QUnitTestResources.php.
-	 * @param ResourceLoader &$resourceLoader
-	 */
-	public static function resourceLoaderTestModules( &$testModules, &$resourceLoader ) {
-		$testModules['qunit']['ext.wikiEditor.toolbar.test'] = [
-			'scripts' => [ 'tests/qunit/ext.wikiEditor.toolbar.test.js' ],
-			'dependencies' => [ 'ext.wikiEditor' ],
-			'localBasePath' => __DIR__ . '/..',
-			'remoteExtPath' => 'WikiEditor',
-		];
-	}
-
 	/**
 	 * MakeGlobalVariablesScript hook
 	 *