tests/qunit/suites/resources/mediawiki/mediawiki.test.js

   1 ( function ( mw, $ ) {
   2         var specialCharactersPageName;
   3
   4         // Since QUnitTestResources.php loads both mediawiki and mediawiki.jqueryMsg as
   5         // dependencies, this only tests the monkey-patched behavior with the two of them combined.
   6
   7         // See mediawiki.jqueryMsg.test.js for unit tests for jqueryMsg-specific functionality.
   8
   9         QUnit.module( 'mediawiki', QUnit.newMwEnvironment( {
  10                 setup: function () {
  11                         // Messages used in multiple tests
  12                         mw.messages.set( {
  13                                 'other-message': 'Other Message',
  14                                 'mediawiki-test-pagetriage-del-talk-page-notify-summary': 'Notifying author of deletion nomination for [[$1]]',
  15                                 'gender-plural-msg': '{{GENDER:$1|he|she|they}} {{PLURAL:$2|is|are}} awesome',
  16                                 'grammar-msg': 'Przeszukaj {{GRAMMAR:grammar_case_foo|{{SITENAME}}}}',
  17                                 'formatnum-msg': '{{formatnum:$1}}',
  18                                 'int-msg': 'Some {{int:other-message}}',
  19                                 'mediawiki-test-version-entrypoints-index-php': '[https://www.mediawiki.org/wiki/Manual:index.php index.php]',
  20                                 'external-link-replace': 'Foo [$1 bar]'
  21                         } );
  22
  23                         mw.config.set( {
  24                                 wgArticlePath: '/wiki/$1',
  25
  26                                 // For formatnum tests
  27                                 wgUserLanguage: 'en'
  28                         } );
  29
  30                         specialCharactersPageName = '"Who" wants to be a millionaire & live on \'Exotic Island\'?';
  31                 }
  32         } ) );
  33
  34         QUnit.test( 'Initial check', 8, function ( assert ) {
  35                 assert.ok( window.jQuery, 'jQuery defined' );
  36                 assert.ok( window.$, '$j defined' );
  37                 assert.ok( window.$j, '$j defined' );
  38                 assert.strictEqual( window.$, window.jQuery, '$ alias to jQuery' );
  39                 assert.strictEqual( window.$j, window.jQuery, '$j alias to jQuery' );
  40
  41                 assert.ok( window.mediaWiki, 'mediaWiki defined' );
  42                 assert.ok( window.mw, 'mw defined' );
  43                 assert.strictEqual( window.mw, window.mediaWiki, 'mw alias to mediaWiki' );
  44         } );
  45
  46         QUnit.test( 'mw.Map', 27, function ( assert ) {
  47                 var arry, conf, funky, globalConf, nummy, someValues;
  48
  49                 conf = new mw.Map();
  50                 // Dummy variables
  51                 funky = function () {};
  52                 arry = [];
  53                 nummy = 7;
  54
  55                 // Single get and set
  56
  57                 assert.strictEqual( conf.set( 'foo', 'Bar' ), true, 'Map.set returns boolean true if a value was set for a valid key string' );
  58                 assert.equal( conf.get( 'foo' ), 'Bar', 'Map.get returns a single value value correctly' );
  59
  60                 assert.strictEqual( conf.get( 'example' ), null, 'Map.get returns null if selection was a string and the key was not found' );
  61                 assert.strictEqual( conf.get( 'example', arry ), arry, 'Map.get returns fallback by reference if the key was not found' );
  62                 assert.strictEqual( conf.get( 'example', undefined ), undefined, 'Map.get supports `undefined` as fallback instead of `null`' );
  63
  64                 assert.strictEqual( conf.get( 'constructor' ), null, 'Map.get does not look at Object.prototype of internal storage (constructor)' );
  65                 assert.strictEqual( conf.get( 'hasOwnProperty' ), null, 'Map.get does not look at Object.prototype of internal storage (hasOwnProperty)' );
  66
  67                 conf.set( 'hasOwnProperty', function () { return true; } );
  68                 assert.strictEqual( conf.get( 'example', 'missing' ), 'missing', 'Map.get uses neutral hasOwnProperty method (positive)' );
  69
  70                 conf.set( 'example', 'Foo' );
  71                 conf.set( 'hasOwnProperty', function () { return false; } );
  72                 assert.strictEqual( conf.get( 'example' ), 'Foo', 'Map.get uses neutral hasOwnProperty method (negative)' );
  73
  74                 assert.strictEqual( conf.set( 'constructor', 42 ), true, 'Map.set for key "constructor"' );
  75                 assert.strictEqual( conf.get( 'constructor' ), 42, 'Map.get for key "constructor"' );
  76
  77                 assert.strictEqual( conf.set( 'ImUndefined', undefined ), true, 'Map.set allows setting value to `undefined`' );
  78                 assert.equal( conf.get( 'ImUndefined', 'fallback' ), undefined , 'Map.get supports retreiving value of `undefined`' );
  79
  80                 assert.strictEqual( conf.set( funky, 'Funky' ), false, 'Map.set returns boolean false if key was invalid (Function)' );
  81                 assert.strictEqual( conf.set( arry, 'Arry' ), false, 'Map.set returns boolean false if key was invalid (Array)' );
  82                 assert.strictEqual( conf.set( nummy, 'Nummy' ), false, 'Map.set returns boolean false if key was invalid (Number)' );
  83
  84                 assert.strictEqual( conf.get( funky ), null, 'Map.get ruturns null if selection was invalid (Function)' );
  85                 assert.strictEqual( conf.get( nummy ), null, 'Map.get ruturns null if selection was invalid (Number)' );
  86
  87                 conf.set( String( nummy ), 'I used to be a number' );
  88
  89                 assert.strictEqual( conf.exists( 'doesNotExist' ), false, 'Map.exists where property does not exist' );
  90                 assert.strictEqual( conf.exists( 'ImUndefined' ), true, 'Map.exists where value is `undefined`' );
  91                 assert.strictEqual( conf.exists( nummy ), false, 'Map.exists where key is invalid but looks like an existing key' );
  92
  93                 // Multiple values at once
  94                 someValues = {
  95                         'foo': 'bar',
  96                         'lorem': 'ipsum',
  97                         'MediaWiki': true
  98                 };
  99                 assert.strictEqual( conf.set( someValues ), true, 'Map.set returns boolean true if multiple values were set by passing an object' );
 100                 assert.deepEqual( conf.get( ['foo', 'lorem'] ), {
 101                         'foo': 'bar',
 102                         'lorem': 'ipsum'
 103                 }, 'Map.get returns multiple values correctly as an object' );
 104
 105                 assert.deepEqual( conf.get( ['foo', 'notExist'] ), {
 106                         'foo': 'bar',
 107                         'notExist': null
 108                 }, 'Map.get return includes keys that were not found as null values' );
 109
 110
 111                 // Interacting with globals and accessing the values object
 112                 assert.strictEqual( conf.get(), conf.values, 'Map.get returns the entire values object by reference (if called without arguments)' );
 113
 114                 conf.set( 'globalMapChecker', 'Hi' );
 115
 116                 assert.ok( 'globalMapChecker' in window === false, 'new mw.Map did not store its values in the global window object by default' );
 117
 118                 globalConf = new mw.Map( true );
 119                 globalConf.set( 'anotherGlobalMapChecker', 'Hello' );
 120
 121                 assert.ok( 'anotherGlobalMapChecker' in window, 'new mw.Map( true ) did store its values in the global window object' );
 122
 123                 // Whitelist this global variable for QUnit's 'noglobal' mode
 124                 if ( QUnit.config.noglobals ) {
 125                         QUnit.config.pollution.push( 'anotherGlobalMapChecker' );
 126                 }
 127         } );
 128
 129         QUnit.test( 'mw.config', 1, function ( assert ) {
 130                 assert.ok( mw.config instanceof mw.Map, 'mw.config instance of mw.Map' );
 131         } );
 132
 133         QUnit.test( 'mw.message & mw.messages', 100, function ( assert ) {
 134                 var goodbye, hello;
 135
 136                 // Convenience method for asserting the same result for multiple formats
 137                 function assertMultipleFormats( messageArguments, formats, expectedResult, assertMessage ) {
 138                         var len = formats.length, format, i;
 139                         for ( i = 0; i < len; i++ ) {
 140                                 format = formats[i];
 141                                 assert.equal( mw.message.apply( null, messageArguments )[format](), expectedResult, assertMessage + ' when format is ' + format );
 142                         }
 143                 }
 144
 145                 assert.ok( mw.messages, 'messages defined' );
 146                 assert.ok( mw.messages instanceof mw.Map, 'mw.messages instance of mw.Map' );
 147                 assert.ok( mw.messages.set( 'hello', 'Hello <b>awesome</b> world' ), 'mw.messages.set: Register' );
 148
 149                 hello = mw.message( 'hello' );
 150
 151                 // https://bugzilla.wikimedia.org/show_bug.cgi?id=44459
 152                 assert.equal( hello.format, 'text', 'Message property "format" defaults to "text"' );
 153
 154                 assert.strictEqual( hello.map, mw.messages, 'Message property "map" defaults to the global instance in mw.messages' );
 155                 assert.equal( hello.key, 'hello', 'Message property "key" (currect key)' );
 156                 assert.deepEqual( hello.parameters, [], 'Message property "parameters" defaults to an empty array' );
 157
 158                 // Todo
 159                 assert.ok( hello.params, 'Message prototype "params"' );
 160
 161                 hello.format = 'plain';
 162                 assert.equal( hello.toString(), 'Hello <b>awesome</b> world', 'Message.toString returns the message as a string with the current "format"' );
 163
 164                 assert.equal( hello.escaped(), 'Hello &lt;b&gt;awesome&lt;/b&gt; world', 'Message.escaped returns the escaped message' );
 165                 assert.equal( hello.format, 'escaped', 'Message.escaped correctly updated the "format" property' );
 166
 167                 assert.ok( mw.messages.set( 'multiple-curly-brace', '"{{SITENAME}}" is the home of {{int:other-message}}' ), 'mw.messages.set: Register' );
 168                 assertMultipleFormats( ['multiple-curly-brace'], ['text', 'parse'], '"' + mw.config.get( 'wgSiteName') + '" is the home of Other Message', 'Curly brace format works correctly' );
 169                 assert.equal( mw.message( 'multiple-curly-brace' ).plain(), mw.messages.get( 'multiple-curly-brace' ), 'Plain format works correctly for curly brace message' );
 170                 assert.equal( mw.message( 'multiple-curly-brace' ).escaped(), mw.html.escape( '"' + mw.config.get( 'wgSiteName') + '" is the home of Other Message' ), 'Escaped format works correctly for curly brace message' );
 171
 172                 assert.ok( mw.messages.set( 'multiple-square-brackets-and-ampersand', 'Visit the [[Project:Community portal|community portal]] & [[Project:Help desk|help desk]]' ), 'mw.messages.set: Register' );
 173                 assertMultipleFormats( ['multiple-square-brackets-and-ampersand'], ['plain', 'text'], mw.messages.get( 'multiple-square-brackets-and-ampersand' ), 'Square bracket message is not processed' );
 174                 assert.equal( mw.message( 'multiple-square-brackets-and-ampersand' ).escaped(), 'Visit the [[Project:Community portal|community portal]] &amp; [[Project:Help desk|help desk]]', 'Escaped format works correctly for square bracket message' );
 175                 assert.htmlEqual( mw.message( 'multiple-square-brackets-and-ampersand' ).parse(), 'Visit the ' +
 176                         '<a title="Project:Community portal" href="/wiki/Project:Community_portal">community portal</a>' +
 177                         ' &amp; <a title="Project:Help desk" href="/wiki/Project:Help_desk">help desk</a>', 'Internal links work with parse' );
 178
 179                 assertMultipleFormats( ['mediawiki-test-version-entrypoints-index-php'], ['plain', 'text', 'escaped'], mw.messages.get( 'mediawiki-test-version-entrypoints-index-php' ), 'External link markup is unprocessed' );
 180                 assert.htmlEqual( mw.message( 'mediawiki-test-version-entrypoints-index-php' ).parse(), '<a href="https://www.mediawiki.org/wiki/Manual:index.php">index.php</a>', 'External link works correctly in parse mode' );
 181
 182                 assertMultipleFormats( ['external-link-replace', 'http://example.org/?x=y&z'], ['plain', 'text'] , 'Foo [http://example.org/?x=y&z bar]', 'Parameters are substituted but external link is not processed' );
 183                 assert.equal( mw.message( 'external-link-replace', 'http://example.org/?x=y&z' ).escaped(), 'Foo [http://example.org/?x=y&amp;z bar]', 'In escaped mode, parameters are substituted and ampersand is escaped, but external link is not processed' );
 184                 assert.htmlEqual( mw.message( 'external-link-replace', 'http://example.org/?x=y&z' ).parse(), 'Foo <a href="http://example.org/?x=y&amp;z">bar</a>', 'External link with replacement works in parse mode without double-escaping' );
 185
 186                 hello.parse();
 187                 assert.equal( hello.format, 'parse', 'Message.parse correctly updated the "format" property' );
 188
 189                 hello.plain();
 190                 assert.equal( hello.format, 'plain', 'Message.plain correctly updated the "format" property' );
 191
 192                 hello.text();
 193                 assert.equal( hello.format, 'text', 'Message.text correctly updated the "format" property' );
 194
 195                 assert.strictEqual( hello.exists(), true, 'Message.exists returns true for existing messages' );
 196
 197                 goodbye = mw.message( 'goodbye' );
 198                 assert.strictEqual( goodbye.exists(), false, 'Message.exists returns false for nonexistent messages' );
 199
 200                 assertMultipleFormats( ['goodbye'], ['plain', 'text'], '<goodbye>', 'Message.toString returns <key> if key does not exist' );
 201                 // bug 30684
 202                 assertMultipleFormats( ['goodbye'], ['parse', 'escaped'], '&lt;goodbye&gt;', 'Message.toString returns properly escaped &lt;key&gt; if key does not exist' );
 203
 204                 assert.ok( mw.messages.set( 'plural-test-msg', 'There {{PLURAL:$1|is|are}} $1 {{PLURAL:$1|result|results}}' ), 'mw.messages.set: Register' );
 205                 assertMultipleFormats( ['plural-test-msg', 6], ['text', 'parse', 'escaped'], 'There are 6 results', 'plural get resolved' );
 206                 assert.equal( mw.message( 'plural-test-msg', 6 ).plain(), 'There {{PLURAL:6|is|are}} 6 {{PLURAL:6|result|results}}', 'Parameter is substituted but plural is not resolved in plain' );
 207
 208                 assert.ok( mw.messages.set( 'plural-test-msg-explicit', 'There {{plural:$1|is one car|are $1 cars|0=are no cars|12=are a dozen cars}}' ), 'mw.messages.set: Register message with explicit plural forms' );
 209                 assertMultipleFormats( ['plural-test-msg-explicit', 12], ['text', 'parse', 'escaped'], 'There are a dozen cars', 'explicit plural get resolved' );
 210
 211                 assert.ok( mw.messages.set( 'plural-test-msg-explicit-beginning', 'Basket has {{plural:$1|0=no eggs|12=a dozen eggs|6=half a dozen eggs|one egg|$1 eggs}}' ), 'mw.messages.set: Register message with explicit plural forms' );
 212                 assertMultipleFormats( ['plural-test-msg-explicit-beginning', 1], ['text', 'parse', 'escaped'], 'Basket has one egg', 'explicit plural given at beginning get resolved for singular' );
 213                 assertMultipleFormats( ['plural-test-msg-explicit-beginning', 4], ['text', 'parse', 'escaped'], 'Basket has 4 eggs', 'explicit plural given at beginning get resolved for plural' );
 214                 assertMultipleFormats( ['plural-test-msg-explicit-beginning', 6], ['text', 'parse', 'escaped'], 'Basket has half a dozen eggs', 'explicit plural given at beginning get resolved for 6' );
 215                 assertMultipleFormats( ['plural-test-msg-explicit-beginning', 0], ['text', 'parse', 'escaped'], 'Basket has no eggs', 'explicit plural given at beginning get resolved for 0' );
 216
 217
 218                 assertMultipleFormats( ['mediawiki-test-pagetriage-del-talk-page-notify-summary'], ['plain', 'text'], mw.messages.get( 'mediawiki-test-pagetriage-del-talk-page-notify-summary' ), 'Double square brackets with no parameters unchanged' );
 219
 220                 assertMultipleFormats( ['mediawiki-test-pagetriage-del-talk-page-notify-summary', specialCharactersPageName], ['plain', 'text'], 'Notifying author of deletion nomination for [[' + specialCharactersPageName + ']]', 'Double square brackets with one parameter' );
 221
 222                 assert.equal( mw.message( 'mediawiki-test-pagetriage-del-talk-page-notify-summary', specialCharactersPageName ).escaped(), 'Notifying author of deletion nomination for [[' + mw.html.escape( specialCharactersPageName ) + ']]', 'Double square brackets with one parameter, when escaped' );
 223
 224
 225                 assert.ok( mw.messages.set( 'mediawiki-test-categorytree-collapse-bullet', '[<b>−</b>]' ), 'mw.messages.set: Register' );
 226                 assert.equal( mw.message( 'mediawiki-test-categorytree-collapse-bullet' ).plain(), mw.messages.get( 'mediawiki-test-categorytree-collapse-bullet' ), 'Single square brackets unchanged in plain mode' );
 227
 228                 assert.ok( mw.messages.set( 'mediawiki-test-wikieditor-toolbar-help-content-signature-result', '<a href=\'#\' title=\'{{#special:mypage}}\'>Username</a> (<a href=\'#\' title=\'{{#special:mytalk}}\'>talk</a>)' ), 'mw.messages.set: Register' );
 229                 assert.equal( mw.message( 'mediawiki-test-wikieditor-toolbar-help-content-signature-result' ).plain(), mw.messages.get( 'mediawiki-test-wikieditor-toolbar-help-content-signature-result' ), 'HTML message with curly braces is not changed in plain mode' );
 230
 231                 assertMultipleFormats( ['gender-plural-msg', 'male', 1], ['text', 'parse', 'escaped'], 'he is awesome', 'Gender and plural are resolved' );
 232                 assert.equal( mw.message( 'gender-plural-msg', 'male', 1 ).plain(), '{{GENDER:male|he|she|they}} {{PLURAL:1|is|are}} awesome', 'Parameters are substituted, but gender and plural are not resolved in plain mode' );
 233
 234                 assert.equal( mw.message( 'grammar-msg' ).plain(), mw.messages.get( 'grammar-msg' ), 'Grammar is not resolved in plain mode' );
 235                 assertMultipleFormats( ['grammar-msg'], ['text', 'parse'], 'Przeszukaj ' + mw.config.get( 'wgSiteName' ), 'Grammar is resolved' );
 236                 assert.equal( mw.message( 'grammar-msg' ).escaped(), 'Przeszukaj ' + mw.html.escape( mw.config.get( 'wgSiteName' ) ), 'Grammar is resolved in escaped mode' );
 237
 238                 assertMultipleFormats( ['formatnum-msg', '987654321.654321'], ['text', 'parse', 'escaped'], '987,654,321.654', 'formatnum is resolved' );
 239                 assert.equal( mw.message( 'formatnum-msg' ).plain(), mw.messages.get( 'formatnum-msg' ), 'formatnum is not resolved in plain mode' );
 240
 241                 assertMultipleFormats( ['int-msg'], ['text', 'parse', 'escaped'], 'Some Other Message', 'int is resolved' );
 242                 assert.equal( mw.message( 'int-msg' ).plain(), mw.messages.get( 'int-msg' ), 'int is not resolved in plain mode' );
 243
 244                 assert.ok( mw.messages.set( 'mediawiki-italics-msg', '<i>Very</i> important' ), 'mw.messages.set: Register' );
 245                 assertMultipleFormats( ['mediawiki-italics-msg'], ['plain', 'text', 'parse'], mw.messages.get( 'mediawiki-italics-msg' ), 'Simple italics unchanged' );
 246                 assert.htmlEqual(
 247                         mw.message( 'mediawiki-italics-msg' ).escaped(),
 248                         '&lt;i&gt;Very&lt;/i&gt; important',
 249                         'Italics are escaped in escaped mode'
 250                 );
 251
 252                 assert.ok( mw.messages.set( 'mediawiki-italics-with-link', 'An <i>italicized [[link|wiki-link]]</i>' ), 'mw.messages.set: Register' );
 253                 assertMultipleFormats( ['mediawiki-italics-with-link'], ['plain', 'text'], mw.messages.get( 'mediawiki-italics-with-link' ), 'Italics with link unchanged' );
 254                 assert.htmlEqual(
 255                         mw.message( 'mediawiki-italics-with-link' ).escaped(),
 256                         'An &lt;i&gt;italicized [[link|wiki-link]]&lt;/i&gt;',
 257                         'Italics and link unchanged except for escaping in escaped mode'
 258                 );
 259                 assert.htmlEqual(
 260                         mw.message( 'mediawiki-italics-with-link' ).parse(),
 261                         'An <i>italicized <a title="link" href="' + mw.util.wikiGetlink( 'link' ) + '">wiki-link</i>',
 262                         'Italics with link inside in parse mode'
 263                 );
 264
 265                 assert.ok( mw.messages.set( 'mediawiki-script-msg', '<script  >alert( "Who put this script here?" );</script>' ), 'mw.messages.set: Register' );
 266                 assertMultipleFormats( ['mediawiki-script-msg'], ['plain', 'text'], mw.messages.get( 'mediawiki-script-msg' ), 'Script unchanged' );
 267                 assert.htmlEqual(
 268                         mw.message( 'mediawiki-script-msg' ).escaped(),
 269                         '&lt;script  &gt;alert( "Who put this script here?" );&lt;/script&gt;',
 270                         'Script escaped when using escaped format'
 271                 );
 272                 assert.htmlEqual(
 273                         mw.message( 'mediawiki-script-msg' ).parse(),
 274                         '&lt;script  &gt;alert( "Who put this script here?" );&lt;/script&gt;',
 275                         'Script escaped when using parse format'
 276                 );
 277
 278
 279         } );
 280
 281         QUnit.test( 'mw.msg', 14, function ( assert ) {
 282                 assert.ok( mw.messages.set( 'hello', 'Hello <b>awesome</b> world' ), 'mw.messages.set: Register' );
 283                 assert.equal( mw.msg( 'hello' ), 'Hello <b>awesome</b> world', 'Gets message with default options (existing message)' );
 284                 assert.equal( mw.msg( 'goodbye' ), '<goodbye>', 'Gets message with default options (nonexistent message)' );
 285
 286                 assert.ok( mw.messages.set( 'plural-item' , 'Found $1 {{PLURAL:$1|item|items}}' ), 'mw.messages.set: Register' );
 287                 assert.equal( mw.msg( 'plural-item', 5 ), 'Found 5 items', 'Apply plural for count 5' );
 288                 assert.equal( mw.msg( 'plural-item', 0 ), 'Found 0 items', 'Apply plural for count 0' );
 289                 assert.equal( mw.msg( 'plural-item', 1 ), 'Found 1 item', 'Apply plural for count 1' );
 290
 291                 assert.equal( mw.msg( 'mediawiki-test-pagetriage-del-talk-page-notify-summary', specialCharactersPageName ), 'Notifying author of deletion nomination for [[' + specialCharactersPageName + ']]', 'Double square brackets in mw.msg one parameter' );
 292
 293                 assert.equal( mw.msg( 'gender-plural-msg', 'male', 1 ), 'he is awesome', 'Gender test for male, plural count 1' );
 294                 assert.equal( mw.msg( 'gender-plural-msg', 'female', '1' ), 'she is awesome', 'Gender test for female, plural count 1' );
 295                 assert.equal( mw.msg( 'gender-plural-msg', 'unknown', 10 ), 'they are awesome', 'Gender test for neutral, plural count 10' );
 296
 297                 assert.equal( mw.msg( 'grammar-msg' ), 'Przeszukaj ' + mw.config.get( 'wgSiteName' ), 'Grammar is resolved' );
 298
 299                 assert.equal( mw.msg( 'formatnum-msg', '987654321.654321' ), '987,654,321.654', 'formatnum is resolved' );
 300
 301                 assert.equal( mw.msg( 'int-msg' ), 'Some Other Message', 'int is resolved' );
 302         } );
 303
 304         /**
 305          * The sync style load test (for @import). This is, in a way, also an open bug for
 306          * ResourceLoader ("execute js after styles are loaded"), but browsers don't offer a
 307          * way to get a callback from when a stylesheet is loaded (that is, including any
 308          * @import rules inside). To work around this, we'll have a little time loop to check
 309          * if the styles apply.
 310          * Note: This test originally used new Image() and onerror to get a callback
 311          * when the url is loaded, but that is fragile since it doesn't monitor the
 312          * same request as the css @import, and Safari 4 has issues with
 313          * onerror/onload not being fired at all in weird cases like this.
 314          */
 315         function assertStyleAsync( assert, $element, prop, val, fn ) {
 316                 var styleTestStart,
 317                         el = $element.get( 0 ),
 318                         styleTestTimeout = ( QUnit.config.testTimeout || 5000 ) - 200;
 319
 320                 function isCssImportApplied() {
 321                         // Trigger reflow, repaint, redraw, whatever (cross-browser)
 322                         var x = $element.css( 'height' );
 323                         x = el.innerHTML;
 324                         el.className = el.className;
 325                         x = document.documentElement.clientHeight;
 326
 327                         return $element.css( prop ) === val;
 328                 }
 329
 330                 function styleTestLoop() {
 331                         var styleTestSince = new Date().getTime() - styleTestStart;
 332                         // If it is passing or if we timed out, run the real test and stop the loop
 333                         if ( isCssImportApplied() || styleTestSince > styleTestTimeout ) {
 334                                 assert.equal( $element.css( prop ), val,
 335                                         'style "' + prop + ': ' + val + '" from url is applied (after ' + styleTestSince + 'ms)'
 336                                 );
 337
 338                                 if ( fn ) {
 339                                         fn();
 340                                 }
 341
 342                                 return;
 343                         }
 344                         // Otherwise, keep polling
 345                         setTimeout( styleTestLoop, 150 );
 346                 }
 347
 348                 // Start the loop
 349                 styleTestStart = new Date().getTime();
 350                 styleTestLoop();
 351         }
 352
 353         function urlStyleTest( selector, prop, val ) {
 354                 return QUnit.fixurl(
 355                         mw.config.get( 'wgScriptPath' ) +
 356                                 '/tests/qunit/data/styleTest.css.php?' +
 357                                 $.param( {
 358                                         selector: selector,
 359                                         prop: prop,
 360                                         val: val
 361                                 } )
 362                 );
 363         }
 364
 365         QUnit.asyncTest( 'mw.loader', 2, function ( assert ) {
 366                 var isAwesomeDone;
 367
 368                 mw.loader.testCallback = function () {
 369                         QUnit.start();
 370                         assert.strictEqual( isAwesomeDone, undefined, 'Implementing module is.awesome: isAwesomeDone should still be undefined' );
 371                         isAwesomeDone = true;
 372                 };
 373
 374                 mw.loader.implement( 'test.callback', [QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/callMwLoaderTestCallback.js' )], {}, {} );
 375
 376                 mw.loader.using( 'test.callback', function () {
 377
 378                         // /sample/awesome.js declares the "mw.loader.testCallback" function
 379                         // which contains a call to start() and ok()
 380                         assert.strictEqual( isAwesomeDone, true, 'test.callback module should\'ve caused isAwesomeDone to be true' );
 381                         delete mw.loader.testCallback;
 382
 383                 }, function () {
 384                         QUnit.start();
 385                         assert.ok( false, 'Error callback fired while loader.using "test.callback" module' );
 386                 } );
 387         } );
 388
 389         QUnit.asyncTest( 'mw.loader.implement( styles={ "css": [text, ..] } )', 2, function ( assert ) {
 390                 var $element = $( '<div class="mw-test-implement-a"></div>' ).appendTo( '#qunit-fixture' );
 391
 392                 assert.notEqual(
 393                         $element.css( 'float' ),
 394                         'right',
 395                         'style is clear'
 396                 );
 397
 398                 mw.loader.implement(
 399                         'test.implement.a',
 400                         function () {
 401                                 assert.equal(
 402                                         $element.css( 'float' ),
 403                                         'right',
 404                                         'style is applied'
 405                                 );
 406                                 QUnit.start();
 407                         },
 408                         {
 409                                 'all': '.mw-test-implement-a { float: right; }'
 410                         },
 411                         {}
 412                 );
 413
 414                 mw.loader.load( [
 415                         'test.implement.a'
 416                 ] );
 417         } );
 418
 419         QUnit.asyncTest( 'mw.loader.implement( styles={ "url": { <media>: [url, ..] } } )', 7, function ( assert ) {
 420                 var $element1 = $( '<div class="mw-test-implement-b1"></div>' ).appendTo( '#qunit-fixture' ),
 421                         $element2 = $( '<div class="mw-test-implement-b2"></div>' ).appendTo( '#qunit-fixture' ),
 422                         $element3 = $( '<div class="mw-test-implement-b3"></div>' ).appendTo( '#qunit-fixture' );
 423
 424                 assert.notEqual(
 425                         $element1.css( 'text-align' ),
 426                         'center',
 427                         'style is clear'
 428                 );
 429                 assert.notEqual(
 430                         $element2.css( 'float' ),
 431                         'left',
 432                         'style is clear'
 433                 );
 434                 assert.notEqual(
 435                         $element3.css( 'text-align' ),
 436                         'right',
 437                         'style is clear'
 438                 );
 439
 440                 mw.loader.implement(
 441                         'test.implement.b',
 442                         function () {
 443                                 // Note: QUnit.start() must only be called when the entire test is
 444                                 // complete. So, make sure that we don't start until *both*
 445                                 // assertStyleAsync calls have completed.
 446                                 var pending = 2;
 447                                 assertStyleAsync( assert, $element2, 'float', 'left', function () {
 448                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 449
 450                                         pending--;
 451                                         if ( pending === 0 ) {
 452                                                 QUnit.start();
 453                                         }
 454                                 } );
 455                                 assertStyleAsync( assert, $element3, 'float', 'right', function () {
 456                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 457
 458                                         pending--;
 459                                         if ( pending === 0 ) {
 460                                                 QUnit.start();
 461                                         }
 462                                 } );
 463                         },
 464                         {
 465                                 'url': {
 466                                         'print': [urlStyleTest( '.mw-test-implement-b1', 'text-align', 'center' )],
 467                                         'screen': [
 468                                                 // bug 40834: Make sure it actually works with more than 1 stylesheet reference
 469                                                 urlStyleTest( '.mw-test-implement-b2', 'float', 'left' ),
 470                                                 urlStyleTest( '.mw-test-implement-b3', 'float', 'right' )
 471                                         ]
 472                                 }
 473                         },
 474                         {}
 475                 );
 476
 477                 mw.loader.load( [
 478                         'test.implement.b'
 479                 ] );
 480         } );
 481
 482         // Backwards compatibility
 483         QUnit.asyncTest( 'mw.loader.implement( styles={ <media>: text } ) (back-compat)', 2, function ( assert ) {
 484                 var $element = $( '<div class="mw-test-implement-c"></div>' ).appendTo( '#qunit-fixture' );
 485
 486                 assert.notEqual(
 487                         $element.css( 'float' ),
 488                         'right',
 489                         'style is clear'
 490                 );
 491
 492                 mw.loader.implement(
 493                         'test.implement.c',
 494                         function () {
 495                                 assert.equal(
 496                                         $element.css( 'float' ),
 497                                         'right',
 498                                         'style is applied'
 499                                 );
 500                                 QUnit.start();
 501                         },
 502                         {
 503                                 'all': '.mw-test-implement-c { float: right; }'
 504                         },
 505                         {}
 506                 );
 507
 508                 mw.loader.load( [
 509                         'test.implement.c'
 510                 ] );
 511         } );
 512
 513         // Backwards compatibility
 514         QUnit.asyncTest( 'mw.loader.implement( styles={ <media>: [url, ..] } ) (back-compat)', 4, function ( assert ) {
 515                 var $element = $( '<div class="mw-test-implement-d"></div>' ).appendTo( '#qunit-fixture' ),
 516                         $element2 = $( '<div class="mw-test-implement-d2"></div>' ).appendTo( '#qunit-fixture' );
 517
 518                 assert.notEqual(
 519                         $element.css( 'float' ),
 520                         'right',
 521                         'style is clear'
 522                 );
 523                 assert.notEqual(
 524                         $element2.css( 'text-align' ),
 525                         'center',
 526                         'style is clear'
 527                 );
 528
 529                 mw.loader.implement(
 530                         'test.implement.d',
 531                         function () {
 532                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 533
 534                                         assert.notEqual( $element2.css( 'text-align' ), 'center', 'print style is not applied (bug 40500)' );
 535
 536                                         QUnit.start();
 537                                 } );
 538                         },
 539                         {
 540                                 'all': [urlStyleTest( '.mw-test-implement-d', 'float', 'right' )],
 541                                 'print': [urlStyleTest( '.mw-test-implement-d2', 'text-align', 'center' )]
 542                         },
 543                         {}
 544                 );
 545
 546                 mw.loader.load( [
 547                         'test.implement.d'
 548                 ] );
 549         } );
 550
 551         // @import (bug 31676)
 552         QUnit.asyncTest( 'mw.loader.implement( styles has @import)', 5, function ( assert ) {
 553                 var isJsExecuted, $element;
 554
 555                 mw.loader.implement(
 556                         'test.implement.import',
 557                         function () {
 558                                 assert.strictEqual( isJsExecuted, undefined, 'javascript not executed multiple times' );
 559                                 isJsExecuted = true;
 560
 561                                 assert.equal( mw.loader.getState( 'test.implement.import' ), 'ready', 'module state is "ready" while implement() is executing javascript' );
 562
 563                                 $element = $( '<div class="mw-test-implement-import">Foo bar</div>' ).appendTo( '#qunit-fixture' );
 564
 565                                 assert.equal( mw.msg( 'test-foobar' ), 'Hello Foobar, $1!', 'Messages are loaded before javascript execution' );
 566
 567                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 568                                         assert.equal( $element.css( 'text-align' ), 'center',
 569                                                 'CSS styles after the @import rule are working'
 570                                         );
 571
 572                                         QUnit.start();
 573                                 } );
 574                         },
 575                         {
 576                                 'css': [
 577                                         '@import url(\''
 578                                                 + urlStyleTest( '.mw-test-implement-import', 'float', 'right' )
 579                                                 + '\');\n'
 580                                                 + '.mw-test-implement-import { text-align: center; }'
 581                                 ]
 582                         },
 583                         {
 584                                 'test-foobar': 'Hello Foobar, $1!'
 585                         }
 586                 );
 587
 588                 mw.loader.load( 'test.implement' );
 589
 590         } );
 591
 592         QUnit.asyncTest( 'mw.loader.implement( only messages )', 2, function ( assert ) {
 593                 assert.assertFalse( mw.messages.exists( 'bug_29107' ), 'Verify that the test message doesn\'t exist yet' );
 594
 595                 mw.loader.implement( 'test.implement.msgs', [], {}, { 'bug_29107': 'loaded' } );
 596                 mw.loader.using( 'test.implement.msgs', function () {
 597                         QUnit.start();
 598                         assert.ok( mw.messages.exists( 'bug_29107' ), 'Bug 29107: messages-only module should implement ok' );
 599                 }, function () {
 600                         QUnit.start();
 601                         assert.ok( false, 'Error callback fired while implementing "test.implement.msgs" module' );
 602                 } );
 603         } );
 604
 605         QUnit.test( 'mw.loader erroneous indirect dependency', 3, function ( assert ) {
 606                 mw.loader.register( [
 607                         ['test.module1', '0'],
 608                         ['test.module2', '0', ['test.module1']],
 609                         ['test.module3', '0', ['test.module2']]
 610                 ] );
 611                 mw.loader.implement( 'test.module1', function () {
 612                         throw new Error( 'expected' );
 613                 }, {}, {} );
 614                 assert.strictEqual( mw.loader.getState( 'test.module1' ), 'error', 'Expected "error" state for test.module1' );
 615                 assert.strictEqual( mw.loader.getState( 'test.module2' ), 'error', 'Expected "error" state for test.module2' );
 616                 assert.strictEqual( mw.loader.getState( 'test.module3' ), 'error', 'Expected "error" state for test.module3' );
 617         } );
 618
 619         QUnit.test( 'mw.loader out-of-order implementation', 9, function ( assert ) {
 620                 mw.loader.register( [
 621                         ['test.module4', '0'],
 622                         ['test.module5', '0', ['test.module4']],
 623                         ['test.module6', '0', ['test.module5']]
 624                 ] );
 625                 mw.loader.implement( 'test.module4', function () {
 626                 }, {}, {} );
 627                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 628                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 629                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'registered', 'Expected "registered" state for test.module6' );
 630                 mw.loader.implement( 'test.module6', function () {
 631                 }, {}, {} );
 632                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 633                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 634                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'loaded', 'Expected "loaded" state for test.module6' );
 635                 mw.loader.implement( 'test.module5', function () {
 636                 }, {}, {} );
 637                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 638                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'ready', 'Expected "ready" state for test.module5' );
 639                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'ready', 'Expected "ready" state for test.module6' );
 640         } );
 641
 642         QUnit.test( 'mw.loader missing dependency', 13, function ( assert ) {
 643                 mw.loader.register( [
 644                         ['test.module7', '0'],
 645                         ['test.module8', '0', ['test.module7']],
 646                         ['test.module9', '0', ['test.module8']]
 647                 ] );
 648                 mw.loader.implement( 'test.module8', function () {
 649                 }, {}, {} );
 650                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'registered', 'Expected "registered" state for test.module7' );
 651                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'loaded', 'Expected "loaded" state for test.module8' );
 652                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'registered', 'Expected "registered" state for test.module9' );
 653                 mw.loader.state( 'test.module7', 'missing' );
 654                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 655                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 656                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 657                 mw.loader.implement( 'test.module9', function () {
 658                 }, {}, {} );
 659                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 660                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 661                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 662                 mw.loader.using(
 663                         ['test.module7'],
 664                         function () {
 665                                 assert.ok( false, 'Success fired despite missing dependency' );
 666                                 assert.ok( true, 'QUnit expected() count dummy' );
 667                         },
 668                         function ( e, dependencies ) {
 669                                 assert.strictEqual( $.isArray( dependencies ), true, 'Expected array of dependencies' );
 670                                 assert.deepEqual( dependencies, ['test.module7'], 'Error callback called with module test.module7' );
 671                         }
 672                 );
 673                 mw.loader.using(
 674                         ['test.module9'],
 675                         function () {
 676                                 assert.ok( false, 'Success fired despite missing dependency' );
 677                                 assert.ok( true, 'QUnit expected() count dummy' );
 678                         },
 679                         function ( e, dependencies ) {
 680                                 assert.strictEqual( $.isArray( dependencies ), true, 'Expected array of dependencies' );
 681                                 dependencies.sort();
 682                                 assert.deepEqual(
 683                                         dependencies,
 684                                         ['test.module7', 'test.module8', 'test.module9'],
 685                                         'Error callback called with all three modules as dependencies'
 686                                 );
 687                         }
 688                 );
 689         } );
 690
 691         QUnit.asyncTest( 'mw.loader dependency handling', 5, function ( assert ) {
 692                 mw.loader.addSource(
 693                         'testloader',
 694                         {
 695                                 loadScript: QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/load.mock.php' )
 696                         }
 697                 );
 698
 699                 mw.loader.register( [
 700                         // [module, version, dependencies, group, source]
 701                         ['testMissing', '1', [], null, 'testloader'],
 702                         ['testUsesMissing', '1', ['testMissing'], null, 'testloader'],
 703                         ['testUsesNestedMissing', '1', ['testUsesMissing'], null, 'testloader']
 704                 ] );
 705
 706                 function verifyModuleStates() {
 707                         assert.equal( mw.loader.getState( 'testMissing' ), 'missing', 'Module not known to server must have state "missing"' );
 708                         assert.equal( mw.loader.getState( 'testUsesMissing' ), 'error', 'Module with missing dependency must have state "error"' );
 709                         assert.equal( mw.loader.getState( 'testUsesNestedMissing' ), 'error', 'Module with indirect missing dependency must have state "error"' );
 710                 }
 711
 712                 mw.loader.using( ['testUsesNestedMissing'],
 713                         function () {
 714                                 assert.ok( false, 'Error handler should be invoked.' );
 715                                 assert.ok( true ); // Dummy to reach QUnit expect()
 716
 717                                 verifyModuleStates();
 718
 719                                 QUnit.start();
 720                         },
 721                         function ( e, badmodules ) {
 722                                 assert.ok( true, 'Error handler should be invoked.' );
 723                                 // As soon as server spits out state('testMissing', 'missing');
 724                                 // it will bubble up and trigger the error callback.
 725                                 // Therefor the badmodules array is not testUsesMissing or testUsesNestedMissing.
 726                                 assert.deepEqual( badmodules, ['testMissing'], 'Bad modules as expected.' );
 727
 728                                 verifyModuleStates();
 729
 730                                 QUnit.start();
 731                         }
 732                 );
 733         } );
 734
 735         QUnit.asyncTest( 'mw.loader( "//protocol-relative" ) (bug 30825)', 2, function ( assert ) {
 736                 // This bug was actually already fixed in 1.18 and later when discovered in 1.17.
 737                 // Test is for regressions!
 738
 739                 // Forge an URL to the test callback script
 740                 var target = QUnit.fixurl(
 741                         mw.config.get( 'wgServer' ) + mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/qunitOkCall.js'
 742                 );
 743
 744                 // Confirm that mw.loader.load() works with protocol-relative URLs
 745                 target = target.replace( /https?:/, '' );
 746
 747                 assert.equal( target.substr( 0, 2 ), '//',
 748                         'URL must be relative to test relative URLs!'
 749                 );
 750
 751                 // Async!
 752                 // The target calls QUnit.start
 753                 mw.loader.load( target );
 754         } );
 755
 756         QUnit.test( 'mw.html', 13, function ( assert ) {
 757                 assert.throws( function () {
 758                         mw.html.escape();
 759                 }, TypeError, 'html.escape throws a TypeError if argument given is not a string' );
 760
 761                 assert.equal( mw.html.escape( '<mw awesome="awesome" value=\'test\' />' ),
 762                         '&lt;mw awesome=&quot;awesome&quot; value=&#039;test&#039; /&gt;', 'escape() escapes special characters to html entities' );
 763
 764                 assert.equal( mw.html.element(),
 765                         '<undefined/>', 'element() always returns a valid html string (even without arguments)' );
 766
 767                 assert.equal( mw.html.element( 'div' ), '<div/>', 'element() Plain DIV (simple)' );
 768
 769                 assert.equal( mw.html.element( 'div', {}, '' ), '<div></div>', 'element() Basic DIV (simple)' );
 770
 771                 assert.equal(
 772                         mw.html.element(
 773                                 'div', {
 774                                         id: 'foobar'
 775                                 }
 776                         ),
 777                         '<div id="foobar"/>',
 778                         'html.element DIV (attribs)' );
 779
 780                 assert.equal( mw.html.element( 'p', null, 12 ), '<p>12</p>', 'Numbers are valid content and should be casted to a string' );
 781
 782                 assert.equal( mw.html.element( 'p', { title: 12 }, '' ), '<p title="12"></p>', 'Numbers are valid attribute values' );
 783
 784                 // Example from https://www.mediawiki.org/wiki/ResourceLoader/Default_modules#mediaWiki.html
 785                 assert.equal(
 786                         mw.html.element(
 787                                 'div',
 788                                 {},
 789                                 new mw.html.Raw(
 790                                         mw.html.element( 'img', { src: '<' } )
 791                                 )
 792                         ),
 793                         '<div><img src="&lt;"/></div>',
 794                         'Raw inclusion of another element'
 795                 );
 796
 797                 assert.equal(
 798                         mw.html.element(
 799                                 'option', {
 800                                         selected: true
 801                                 }, 'Foo'
 802                         ),
 803                         '<option selected="selected">Foo</option>',
 804                         'Attributes may have boolean values. True copies the attribute name to the value.'
 805                 );
 806
 807                 assert.equal(
 808                         mw.html.element(
 809                                 'option', {
 810                                         value: 'foo',
 811                                         selected: false
 812                                 }, 'Foo'
 813                         ),
 814                         '<option value="foo">Foo</option>',
 815                         'Attributes may have boolean values. False keeps the attribute from output.'
 816                 );
 817
 818                 assert.equal( mw.html.element( 'div',
 819                         null, 'a' ),
 820                         '<div>a</div>',
 821                         'html.element DIV (content)' );
 822
 823                 assert.equal( mw.html.element( 'a',
 824                         { href: 'http://mediawiki.org/w/index.php?title=RL&action=history' }, 'a' ),
 825                         '<a href="http://mediawiki.org/w/index.php?title=RL&amp;action=history">a</a>',
 826                         'html.element DIV (attribs + content)' );
 827
 828         } );
 829
 830         QUnit.test( 'mw.hook', 10, function ( assert ) {
 831                 var hook, add, fire, chars, callback;
 832
 833                 mw.hook( 'test.hook.unfired' ).add( function () {
 834                         assert.ok( false, 'Unfired hook' );
 835                 } );
 836
 837                 mw.hook( 'test.hook.basic' ).add( function () {
 838                         assert.ok( true, 'Basic callback' );
 839                 } );
 840                 mw.hook( 'test.hook.basic' ).fire();
 841
 842                 mw.hook( 'test.hook.data' ).add( function ( data1, data2 ) {
 843                         assert.equal( data1, 'example', 'Fire with data (string param)' );
 844                         assert.deepEqual( data2, ['two'], 'Fire with data (array param)' );
 845                 } );
 846                 mw.hook( 'test.hook.data' ).fire( 'example', ['two'] );
 847
 848                 mw.hook( 'test.hook.chainable' ).add( function () {
 849                         assert.ok( true, 'Chainable' );
 850                 } ).fire();
 851
 852                 hook = mw.hook( 'test.hook.detach' );
 853                 add = hook.add;
 854                 fire = hook.fire;
 855                 add( function ( x, y ) {
 856                         assert.deepEqual( [x, y], ['x', 'y'], 'Detached (contextless) with data' );
 857                 } );
 858                 fire( 'x', 'y' );
 859
 860                 mw.hook( 'test.hook.fireBefore' ).fire().add( function () {
 861                         assert.ok( true, 'Invoke handler right away if it was fired before' );
 862                 } );
 863
 864                 mw.hook( 'test.hook.fireTwiceBefore' ).fire().fire().add( function () {
 865                         assert.ok( true, 'Invoke handler right away if it was fired before (only last one)' );
 866                 } );
 867
 868                 chars = [];
 869
 870                 mw.hook( 'test.hook.many' )
 871                         .add( function ( chr ) {
 872                                 chars.push( chr );
 873                         } )
 874                         .fire( 'x' ).fire( 'y' ).fire( 'z' )
 875                         .add( function ( chr ) {
 876                                 assert.equal( chr, 'z', 'Adding callback later invokes right away with last data' );
 877                         } );
 878
 879                 assert.deepEqual( chars, ['x', 'y', 'z'], 'Multiple callbacks with multiple fires' );
 880
 881                 chars = [];
 882                 callback = function ( chr ) {
 883                         chars.push( chr );
 884                 };
 885
 886                 mw.hook( 'test.hook.variadic' )
 887                         .add(
 888                                 callback,
 889                                 callback,
 890                                 function ( chr ) {
 891                                         chars.push( chr );
 892                                 },
 893                                 callback
 894                         )
 895                         .fire( 'x' )
 896                         .remove(
 897                                 function () {
 898                                         'not-added';
 899                                 },
 900                                 callback
 901                         )
 902                         .fire( 'y' )
 903                         .remove( callback )
 904                         .fire( 'z' );
 905
 906                 assert.deepEqual(
 907                         chars,
 908                         ['x', 'x', 'x', 'x', 'y', 'z'],
 909                         '"add" and "remove" support variadic arguments. ' +
 910                                 '"add" does not filter unique. ' +
 911                                 '"remove" removes all equal by reference. ' +
 912                                 '"remove" is silent if the function is not found'
 913                 );
 914         } );
 915
 916 }( mediaWiki, jQuery ) );