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

   1 /*jshint -W024 */
   2 ( function ( mw, $ ) {
   3         var specialCharactersPageName;
   4
   5         // Since QUnitTestResources.php loads both mediawiki and mediawiki.jqueryMsg as
   6         // dependencies, this only tests the monkey-patched behavior with the two of them combined.
   7
   8         // See mediawiki.jqueryMsg.test.js for unit tests for jqueryMsg-specific functionality.
   9
  10         QUnit.module( 'mediawiki', QUnit.newMwEnvironment( {
  11                 setup: function () {
  12                         // Messages used in multiple tests
  13                         mw.messages.set( {
  14                                 'other-message': 'Other Message',
  15                                 'mediawiki-test-pagetriage-del-talk-page-notify-summary': 'Notifying author of deletion nomination for [[$1]]',
  16                                 'gender-plural-msg': '{{GENDER:$1|he|she|they}} {{PLURAL:$2|is|are}} awesome',
  17                                 'grammar-msg': 'Przeszukaj {{GRAMMAR:grammar_case_foo|{{SITENAME}}}}',
  18                                 'formatnum-msg': '{{formatnum:$1}}',
  19                                 'int-msg': 'Some {{int:other-message}}',
  20                                 'mediawiki-test-version-entrypoints-index-php': '[https://www.mediawiki.org/wiki/Manual:index.php index.php]',
  21                                 'external-link-replace': 'Foo [$1 bar]'
  22                         } );
  23
  24                         mw.config.set( {
  25                                 wgArticlePath: '/wiki/$1',
  26
  27                                 // For formatnum tests
  28                                 wgUserLanguage: 'en'
  29                         } );
  30
  31                         specialCharactersPageName = '"Who" wants to be a millionaire & live on \'Exotic Island\'?';
  32                 }
  33         } ) );
  34
  35         QUnit.test( 'Initial check', 8, function ( assert ) {
  36                 assert.ok( window.jQuery, 'jQuery defined' );
  37                 assert.ok( window.$, '$ defined' );
  38                 assert.strictEqual( window.$, window.jQuery, '$ alias to jQuery' );
  39
  40                 this.suppressWarnings();
  41                 assert.ok( window.$j, '$j defined' );
  42                 assert.strictEqual( window.$j, window.jQuery, '$j alias to jQuery' );
  43                 this.restoreWarnings();
  44
  45                 assert.ok( window.mediaWiki, 'mediaWiki defined' );
  46                 assert.ok( window.mw, 'mw defined' );
  47                 assert.strictEqual( window.mw, window.mediaWiki, 'mw alias to mediaWiki' );
  48         } );
  49
  50         QUnit.test( 'mw.Map', 28, function ( assert ) {
  51                 var arry, conf, funky, globalConf, nummy, someValues;
  52
  53                 conf = new mw.Map();
  54                 // Dummy variables
  55                 funky = function () {};
  56                 arry = [];
  57                 nummy = 7;
  58
  59                 // Single get and set
  60
  61                 assert.strictEqual( conf.set( 'foo', 'Bar' ), true, 'Map.set returns boolean true if a value was set for a valid key string' );
  62                 assert.equal( conf.get( 'foo' ), 'Bar', 'Map.get returns a single value value correctly' );
  63
  64                 assert.strictEqual( conf.get( 'example' ), null, 'Map.get returns null if selection was a string and the key was not found' );
  65                 assert.strictEqual( conf.get( 'example', arry ), arry, 'Map.get returns fallback by reference if the key was not found' );
  66                 assert.strictEqual( conf.get( 'example', undefined ), undefined, 'Map.get supports `undefined` as fallback instead of `null`' );
  67
  68                 assert.strictEqual( conf.get( 'constructor' ), null, 'Map.get does not look at Object.prototype of internal storage (constructor)' );
  69                 assert.strictEqual( conf.get( 'hasOwnProperty' ), null, 'Map.get does not look at Object.prototype of internal storage (hasOwnProperty)' );
  70
  71                 conf.set( 'hasOwnProperty', function () { return true; } );
  72                 assert.strictEqual( conf.get( 'example', 'missing' ), 'missing', 'Map.get uses neutral hasOwnProperty method (positive)' );
  73
  74                 conf.set( 'example', 'Foo' );
  75                 conf.set( 'hasOwnProperty', function () { return false; } );
  76                 assert.strictEqual( conf.get( 'example' ), 'Foo', 'Map.get uses neutral hasOwnProperty method (negative)' );
  77
  78                 assert.strictEqual( conf.set( 'constructor', 42 ), true, 'Map.set for key "constructor"' );
  79                 assert.strictEqual( conf.get( 'constructor' ), 42, 'Map.get for key "constructor"' );
  80
  81                 assert.strictEqual( conf.set( 'ImUndefined', undefined ), true, 'Map.set allows setting value to `undefined`' );
  82                 assert.equal( conf.get( 'ImUndefined', 'fallback' ), undefined, 'Map.get supports retreiving value of `undefined`' );
  83
  84                 assert.strictEqual( conf.set( funky, 'Funky' ), false, 'Map.set returns boolean false if key was invalid (Function)' );
  85                 assert.strictEqual( conf.set( arry, 'Arry' ), false, 'Map.set returns boolean false if key was invalid (Array)' );
  86                 assert.strictEqual( conf.set( nummy, 'Nummy' ), false, 'Map.set returns boolean false if key was invalid (Number)' );
  87
  88                 assert.strictEqual( conf.get( funky ), null, 'Map.get ruturns null if selection was invalid (Function)' );
  89                 assert.strictEqual( conf.get( nummy ), null, 'Map.get ruturns null if selection was invalid (Number)' );
  90
  91                 conf.set( String( nummy ), 'I used to be a number' );
  92
  93                 assert.strictEqual( conf.exists( 'doesNotExist' ), false, 'Map.exists where property does not exist' );
  94                 assert.strictEqual( conf.exists( 'ImUndefined' ), true, 'Map.exists where value is `undefined`' );
  95                 assert.strictEqual( conf.exists( nummy ), false, 'Map.exists where key is invalid but looks like an existing key' );
  96
  97                 // Multiple values at once
  98                 someValues = {
  99                         'foo': 'bar',
 100                         'lorem': 'ipsum',
 101                         'MediaWiki': true
 102                 };
 103                 assert.strictEqual( conf.set( someValues ), true, 'Map.set returns boolean true if multiple values were set by passing an object' );
 104                 assert.deepEqual( conf.get( ['foo', 'lorem'] ), {
 105                         'foo': 'bar',
 106                         'lorem': 'ipsum'
 107                 }, 'Map.get returns multiple values correctly as an object' );
 108
 109                 assert.deepEqual( conf, new mw.Map( conf.values ), 'new mw.Map maps over existing values-bearing object' );
 110
 111                 assert.deepEqual( conf.get( ['foo', 'notExist'] ), {
 112                         'foo': 'bar',
 113                         'notExist': null
 114                 }, 'Map.get return includes keys that were not found as null values' );
 115
 116                 // Interacting with globals and accessing the values object
 117                 assert.strictEqual( conf.get(), conf.values, 'Map.get returns the entire values object by reference (if called without arguments)' );
 118
 119                 conf.set( 'globalMapChecker', 'Hi' );
 120
 121                 assert.ok( 'globalMapChecker' in window === false, 'new mw.Map did not store its values in the global window object by default' );
 122
 123                 globalConf = new mw.Map( true );
 124                 globalConf.set( 'anotherGlobalMapChecker', 'Hello' );
 125
 126                 assert.ok( 'anotherGlobalMapChecker' in window, 'new mw.Map( true ) did store its values in the global window object' );
 127
 128                 // Whitelist this global variable for QUnit's 'noglobal' mode
 129                 if ( QUnit.config.noglobals ) {
 130                         QUnit.config.pollution.push( 'anotherGlobalMapChecker' );
 131                 }
 132         } );
 133
 134         QUnit.test( 'mw.config', 1, function ( assert ) {
 135                 assert.ok( mw.config instanceof mw.Map, 'mw.config instance of mw.Map' );
 136         } );
 137
 138         QUnit.test( 'mw.message & mw.messages', 100, function ( assert ) {
 139                 var goodbye, hello;
 140
 141                 // Convenience method for asserting the same result for multiple formats
 142                 function assertMultipleFormats( messageArguments, formats, expectedResult, assertMessage ) {
 143                         var len = formats.length, format, i;
 144                         for ( i = 0; i < len; i++ ) {
 145                                 format = formats[i];
 146                                 assert.equal( mw.message.apply( null, messageArguments )[format](), expectedResult, assertMessage + ' when format is ' + format );
 147                         }
 148                 }
 149
 150                 assert.ok( mw.messages, 'messages defined' );
 151                 assert.ok( mw.messages instanceof mw.Map, 'mw.messages instance of mw.Map' );
 152                 assert.ok( mw.messages.set( 'hello', 'Hello <b>awesome</b> world' ), 'mw.messages.set: Register' );
 153
 154                 hello = mw.message( 'hello' );
 155
 156                 // https://bugzilla.wikimedia.org/show_bug.cgi?id=44459
 157                 assert.equal( hello.format, 'text', 'Message property "format" defaults to "text"' );
 158
 159                 assert.strictEqual( hello.map, mw.messages, 'Message property "map" defaults to the global instance in mw.messages' );
 160                 assert.equal( hello.key, 'hello', 'Message property "key" (currect key)' );
 161                 assert.deepEqual( hello.parameters, [], 'Message property "parameters" defaults to an empty array' );
 162
 163                 // Todo
 164                 assert.ok( hello.params, 'Message prototype "params"' );
 165
 166                 hello.format = 'plain';
 167                 assert.equal( hello.toString(), 'Hello <b>awesome</b> world', 'Message.toString returns the message as a string with the current "format"' );
 168
 169                 assert.equal( hello.escaped(), 'Hello &lt;b&gt;awesome&lt;/b&gt; world', 'Message.escaped returns the escaped message' );
 170                 assert.equal( hello.format, 'escaped', 'Message.escaped correctly updated the "format" property' );
 171
 172                 assert.ok( mw.messages.set( 'multiple-curly-brace', '"{{SITENAME}}" is the home of {{int:other-message}}' ), 'mw.messages.set: Register' );
 173                 assertMultipleFormats( ['multiple-curly-brace'], ['text', 'parse'], '"' + mw.config.get( 'wgSiteName') + '" is the home of Other Message', 'Curly brace format works correctly' );
 174                 assert.equal( mw.message( 'multiple-curly-brace' ).plain(), mw.messages.get( 'multiple-curly-brace' ), 'Plain format works correctly for curly brace message' );
 175                 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' );
 176
 177                 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' );
 178                 assertMultipleFormats( ['multiple-square-brackets-and-ampersand'], ['plain', 'text'], mw.messages.get( 'multiple-square-brackets-and-ampersand' ), 'Square bracket message is not processed' );
 179                 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' );
 180                 assert.htmlEqual( mw.message( 'multiple-square-brackets-and-ampersand' ).parse(), 'Visit the ' +
 181                         '<a title="Project:Community portal" href="/wiki/Project:Community_portal">community portal</a>' +
 182                         ' &amp; <a title="Project:Help desk" href="/wiki/Project:Help_desk">help desk</a>', 'Internal links work with parse' );
 183
 184                 assertMultipleFormats( ['mediawiki-test-version-entrypoints-index-php'], ['plain', 'text', 'escaped'], mw.messages.get( 'mediawiki-test-version-entrypoints-index-php' ), 'External link markup is unprocessed' );
 185                 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' );
 186
 187                 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' );
 188                 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' );
 189                 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' );
 190
 191                 hello.parse();
 192                 assert.equal( hello.format, 'parse', 'Message.parse correctly updated the "format" property' );
 193
 194                 hello.plain();
 195                 assert.equal( hello.format, 'plain', 'Message.plain correctly updated the "format" property' );
 196
 197                 hello.text();
 198                 assert.equal( hello.format, 'text', 'Message.text correctly updated the "format" property' );
 199
 200                 assert.strictEqual( hello.exists(), true, 'Message.exists returns true for existing messages' );
 201
 202                 goodbye = mw.message( 'goodbye' );
 203                 assert.strictEqual( goodbye.exists(), false, 'Message.exists returns false for nonexistent messages' );
 204
 205                 assertMultipleFormats( ['goodbye'], ['plain', 'text'], '<goodbye>', 'Message.toString returns <key> if key does not exist' );
 206                 // bug 30684
 207                 assertMultipleFormats( ['goodbye'], ['parse', 'escaped'], '&lt;goodbye&gt;', 'Message.toString returns properly escaped &lt;key&gt; if key does not exist' );
 208
 209                 assert.ok( mw.messages.set( 'plural-test-msg', 'There {{PLURAL:$1|is|are}} $1 {{PLURAL:$1|result|results}}' ), 'mw.messages.set: Register' );
 210                 assertMultipleFormats( ['plural-test-msg', 6], ['text', 'parse', 'escaped'], 'There are 6 results', 'plural get resolved' );
 211                 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' );
 212
 213                 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' );
 214                 assertMultipleFormats( ['plural-test-msg-explicit', 12], ['text', 'parse', 'escaped'], 'There are a dozen cars', 'explicit plural get resolved' );
 215
 216                 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' );
 217                 assertMultipleFormats( ['plural-test-msg-explicit-beginning', 1], ['text', 'parse', 'escaped'], 'Basket has one egg', 'explicit plural given at beginning get resolved for singular' );
 218                 assertMultipleFormats( ['plural-test-msg-explicit-beginning', 4], ['text', 'parse', 'escaped'], 'Basket has 4 eggs', 'explicit plural given at beginning get resolved for plural' );
 219                 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' );
 220                 assertMultipleFormats( ['plural-test-msg-explicit-beginning', 0], ['text', 'parse', 'escaped'], 'Basket has no eggs', 'explicit plural given at beginning get resolved for 0' );
 221
 222                 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' );
 223
 224                 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' );
 225
 226                 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' );
 227
 228                 assert.ok( mw.messages.set( 'mediawiki-test-categorytree-collapse-bullet', '[<b>−</b>]' ), 'mw.messages.set: Register' );
 229                 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' );
 230
 231                 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' );
 232                 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' );
 233
 234                 assertMultipleFormats( ['gender-plural-msg', 'male', 1], ['text', 'parse', 'escaped'], 'he is awesome', 'Gender and plural are resolved' );
 235                 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' );
 236
 237                 assert.equal( mw.message( 'grammar-msg' ).plain(), mw.messages.get( 'grammar-msg' ), 'Grammar is not resolved in plain mode' );
 238                 assertMultipleFormats( ['grammar-msg'], ['text', 'parse'], 'Przeszukaj ' + mw.config.get( 'wgSiteName' ), 'Grammar is resolved' );
 239                 assert.equal( mw.message( 'grammar-msg' ).escaped(), 'Przeszukaj ' + mw.html.escape( mw.config.get( 'wgSiteName' ) ), 'Grammar is resolved in escaped mode' );
 240
 241                 assertMultipleFormats( ['formatnum-msg', '987654321.654321'], ['text', 'parse', 'escaped'], '987,654,321.654', 'formatnum is resolved' );
 242                 assert.equal( mw.message( 'formatnum-msg' ).plain(), mw.messages.get( 'formatnum-msg' ), 'formatnum is not resolved in plain mode' );
 243
 244                 assertMultipleFormats( ['int-msg'], ['text', 'parse', 'escaped'], 'Some Other Message', 'int is resolved' );
 245                 assert.equal( mw.message( 'int-msg' ).plain(), mw.messages.get( 'int-msg' ), 'int is not resolved in plain mode' );
 246
 247                 assert.ok( mw.messages.set( 'mediawiki-italics-msg', '<i>Very</i> important' ), 'mw.messages.set: Register' );
 248                 assertMultipleFormats( ['mediawiki-italics-msg'], ['plain', 'text', 'parse'], mw.messages.get( 'mediawiki-italics-msg' ), 'Simple italics unchanged' );
 249                 assert.htmlEqual(
 250                         mw.message( 'mediawiki-italics-msg' ).escaped(),
 251                         '&lt;i&gt;Very&lt;/i&gt; important',
 252                         'Italics are escaped in escaped mode'
 253                 );
 254
 255                 assert.ok( mw.messages.set( 'mediawiki-italics-with-link', 'An <i>italicized [[link|wiki-link]]</i>' ), 'mw.messages.set: Register' );
 256                 assertMultipleFormats( ['mediawiki-italics-with-link'], ['plain', 'text'], mw.messages.get( 'mediawiki-italics-with-link' ), 'Italics with link unchanged' );
 257                 assert.htmlEqual(
 258                         mw.message( 'mediawiki-italics-with-link' ).escaped(),
 259                         'An &lt;i&gt;italicized [[link|wiki-link]]&lt;/i&gt;',
 260                         'Italics and link unchanged except for escaping in escaped mode'
 261                 );
 262                 assert.htmlEqual(
 263                         mw.message( 'mediawiki-italics-with-link' ).parse(),
 264                         'An <i>italicized <a title="link" href="' + mw.util.getUrl( 'link' ) + '">wiki-link</i>',
 265                         'Italics with link inside in parse mode'
 266                 );
 267
 268                 assert.ok( mw.messages.set( 'mediawiki-script-msg', '<script  >alert( "Who put this script here?" );</script>' ), 'mw.messages.set: Register' );
 269                 assertMultipleFormats( ['mediawiki-script-msg'], ['plain', 'text'], mw.messages.get( 'mediawiki-script-msg' ), 'Script unchanged' );
 270                 assert.htmlEqual(
 271                         mw.message( 'mediawiki-script-msg' ).escaped(),
 272                         '&lt;script  &gt;alert( "Who put this script here?" );&lt;/script&gt;',
 273                         'Script escaped when using escaped format'
 274                 );
 275                 assert.htmlEqual(
 276                         mw.message( 'mediawiki-script-msg' ).parse(),
 277                         '&lt;script  &gt;alert( "Who put this script here?" );&lt;/script&gt;',
 278                         'Script escaped when using parse format'
 279                 );
 280
 281         } );
 282
 283         QUnit.test( 'mw.msg', 14, function ( assert ) {
 284                 assert.ok( mw.messages.set( 'hello', 'Hello <b>awesome</b> world' ), 'mw.messages.set: Register' );
 285                 assert.equal( mw.msg( 'hello' ), 'Hello <b>awesome</b> world', 'Gets message with default options (existing message)' );
 286                 assert.equal( mw.msg( 'goodbye' ), '<goodbye>', 'Gets message with default options (nonexistent message)' );
 287
 288                 assert.ok( mw.messages.set( 'plural-item', 'Found $1 {{PLURAL:$1|item|items}}' ), 'mw.messages.set: Register' );
 289                 assert.equal( mw.msg( 'plural-item', 5 ), 'Found 5 items', 'Apply plural for count 5' );
 290                 assert.equal( mw.msg( 'plural-item', 0 ), 'Found 0 items', 'Apply plural for count 0' );
 291                 assert.equal( mw.msg( 'plural-item', 1 ), 'Found 1 item', 'Apply plural for count 1' );
 292
 293                 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' );
 294
 295                 assert.equal( mw.msg( 'gender-plural-msg', 'male', 1 ), 'he is awesome', 'Gender test for male, plural count 1' );
 296                 assert.equal( mw.msg( 'gender-plural-msg', 'female', '1' ), 'she is awesome', 'Gender test for female, plural count 1' );
 297                 assert.equal( mw.msg( 'gender-plural-msg', 'unknown', 10 ), 'they are awesome', 'Gender test for neutral, plural count 10' );
 298
 299                 assert.equal( mw.msg( 'grammar-msg' ), 'Przeszukaj ' + mw.config.get( 'wgSiteName' ), 'Grammar is resolved' );
 300
 301                 assert.equal( mw.msg( 'formatnum-msg', '987654321.654321' ), '987,654,321.654', 'formatnum is resolved' );
 302
 303                 assert.equal( mw.msg( 'int-msg' ), 'Some Other Message', 'int is resolved' );
 304         } );
 305
 306         /**
 307          * The sync style load test (for @import). This is, in a way, also an open bug for
 308          * ResourceLoader ("execute js after styles are loaded"), but browsers don't offer a
 309          * way to get a callback from when a stylesheet is loaded (that is, including any
 310          * @import rules inside). To work around this, we'll have a little time loop to check
 311          * if the styles apply.
 312          * Note: This test originally used new Image() and onerror to get a callback
 313          * when the url is loaded, but that is fragile since it doesn't monitor the
 314          * same request as the css @import, and Safari 4 has issues with
 315          * onerror/onload not being fired at all in weird cases like this.
 316          */
 317         function assertStyleAsync( assert, $element, prop, val, fn ) {
 318                 var styleTestStart,
 319                         el = $element.get( 0 ),
 320                         styleTestTimeout = ( QUnit.config.testTimeout || 5000 ) - 200;
 321
 322                 function isCssImportApplied() {
 323                         // Trigger reflow, repaint, redraw, whatever (cross-browser)
 324                         var x = $element.css( 'height' );
 325                         x = el.innerHTML;
 326                         el.className = el.className;
 327                         x = document.documentElement.clientHeight;
 328
 329                         return $element.css( prop ) === val;
 330                 }
 331
 332                 function styleTestLoop() {
 333                         var styleTestSince = new Date().getTime() - styleTestStart;
 334                         // If it is passing or if we timed out, run the real test and stop the loop
 335                         if ( isCssImportApplied() || styleTestSince > styleTestTimeout ) {
 336                                 assert.equal( $element.css( prop ), val,
 337                                         'style "' + prop + ': ' + val + '" from url is applied (after ' + styleTestSince + 'ms)'
 338                                 );
 339
 340                                 if ( fn ) {
 341                                         fn();
 342                                 }
 343
 344                                 return;
 345                         }
 346                         // Otherwise, keep polling
 347                         setTimeout( styleTestLoop, 150 );
 348                 }
 349
 350                 // Start the loop
 351                 styleTestStart = new Date().getTime();
 352                 styleTestLoop();
 353         }
 354
 355         function urlStyleTest( selector, prop, val ) {
 356                 return QUnit.fixurl(
 357                         mw.config.get( 'wgScriptPath' ) +
 358                                 '/tests/qunit/data/styleTest.css.php?' +
 359                                 $.param( {
 360                                         selector: selector,
 361                                         prop: prop,
 362                                         val: val
 363                                 } )
 364                 );
 365         }
 366
 367         QUnit.asyncTest( 'mw.loader', 2, function ( assert ) {
 368                 var isAwesomeDone;
 369
 370                 mw.loader.testCallback = function () {
 371                         QUnit.start();
 372                         assert.strictEqual( isAwesomeDone, undefined, 'Implementing module is.awesome: isAwesomeDone should still be undefined' );
 373                         isAwesomeDone = true;
 374                 };
 375
 376                 mw.loader.implement( 'test.callback', [QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/callMwLoaderTestCallback.js' )], {}, {} );
 377
 378                 mw.loader.using( 'test.callback', function () {
 379
 380                         // /sample/awesome.js declares the "mw.loader.testCallback" function
 381                         // which contains a call to start() and ok()
 382                         assert.strictEqual( isAwesomeDone, true, 'test.callback module should\'ve caused isAwesomeDone to be true' );
 383                         delete mw.loader.testCallback;
 384
 385                 }, function () {
 386                         QUnit.start();
 387                         assert.ok( false, 'Error callback fired while loader.using "test.callback" module' );
 388                 } );
 389         } );
 390
 391         QUnit.asyncTest( 'mw.loader.using( .. ).promise', 2, function ( assert ) {
 392                 var isAwesomeDone;
 393
 394                 mw.loader.testCallback = function () {
 395                         QUnit.start();
 396                         assert.strictEqual( isAwesomeDone, undefined, 'Implementing module is.awesome: isAwesomeDone should still be undefined' );
 397                         isAwesomeDone = true;
 398                 };
 399
 400                 mw.loader.implement( 'test.promise', [QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/callMwLoaderTestCallback.js' )], {}, {} );
 401
 402                 mw.loader.using( 'test.promise' )
 403                 .done( function () {
 404
 405                         // /sample/awesome.js declares the "mw.loader.testCallback" function
 406                         // which contains a call to start() and ok()
 407                         assert.strictEqual( isAwesomeDone, true, 'test.promise module should\'ve caused isAwesomeDone to be true' );
 408                         delete mw.loader.testCallback;
 409
 410                 } )
 411                 .fail( function () {
 412                         QUnit.start();
 413                         assert.ok( false, 'Error callback fired while loader.using "test.promise" module' );
 414                 } );
 415         } );
 416
 417         QUnit.asyncTest( 'mw.loader.implement( styles={ "css": [text, ..] } )', 2, function ( assert ) {
 418                 var $element = $( '<div class="mw-test-implement-a"></div>' ).appendTo( '#qunit-fixture' );
 419
 420                 assert.notEqual(
 421                         $element.css( 'float' ),
 422                         'right',
 423                         'style is clear'
 424                 );
 425
 426                 mw.loader.implement(
 427                         'test.implement.a',
 428                         function () {
 429                                 assert.equal(
 430                                         $element.css( 'float' ),
 431                                         'right',
 432                                         'style is applied'
 433                                 );
 434                                 QUnit.start();
 435                         },
 436                         {
 437                                 'all': '.mw-test-implement-a { float: right; }'
 438                         },
 439                         {}
 440                 );
 441
 442                 mw.loader.load( [
 443                         'test.implement.a'
 444                 ] );
 445         } );
 446
 447         QUnit.asyncTest( 'mw.loader.implement( styles={ "url": { <media>: [url, ..] } } )', 7, function ( assert ) {
 448                 var $element1 = $( '<div class="mw-test-implement-b1"></div>' ).appendTo( '#qunit-fixture' ),
 449                         $element2 = $( '<div class="mw-test-implement-b2"></div>' ).appendTo( '#qunit-fixture' ),
 450                         $element3 = $( '<div class="mw-test-implement-b3"></div>' ).appendTo( '#qunit-fixture' );
 451
 452                 assert.notEqual(
 453                         $element1.css( 'text-align' ),
 454                         'center',
 455                         'style is clear'
 456                 );
 457                 assert.notEqual(
 458                         $element2.css( 'float' ),
 459                         'left',
 460                         'style is clear'
 461                 );
 462                 assert.notEqual(
 463                         $element3.css( 'text-align' ),
 464                         'right',
 465                         'style is clear'
 466                 );
 467
 468                 mw.loader.implement(
 469                         'test.implement.b',
 470                         function () {
 471                                 // Note: QUnit.start() must only be called when the entire test is
 472                                 // complete. So, make sure that we don't start until *both*
 473                                 // assertStyleAsync calls have completed.
 474                                 var pending = 2;
 475                                 assertStyleAsync( assert, $element2, 'float', 'left', function () {
 476                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 477
 478                                         pending--;
 479                                         if ( pending === 0 ) {
 480                                                 QUnit.start();
 481                                         }
 482                                 } );
 483                                 assertStyleAsync( assert, $element3, 'float', 'right', function () {
 484                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 485
 486                                         pending--;
 487                                         if ( pending === 0 ) {
 488                                                 QUnit.start();
 489                                         }
 490                                 } );
 491                         },
 492                         {
 493                                 'url': {
 494                                         'print': [urlStyleTest( '.mw-test-implement-b1', 'text-align', 'center' )],
 495                                         'screen': [
 496                                                 // bug 40834: Make sure it actually works with more than 1 stylesheet reference
 497                                                 urlStyleTest( '.mw-test-implement-b2', 'float', 'left' ),
 498                                                 urlStyleTest( '.mw-test-implement-b3', 'float', 'right' )
 499                                         ]
 500                                 }
 501                         },
 502                         {}
 503                 );
 504
 505                 mw.loader.load( [
 506                         'test.implement.b'
 507                 ] );
 508         } );
 509
 510         // Backwards compatibility
 511         QUnit.asyncTest( 'mw.loader.implement( styles={ <media>: text } ) (back-compat)', 2, function ( assert ) {
 512                 var $element = $( '<div class="mw-test-implement-c"></div>' ).appendTo( '#qunit-fixture' );
 513
 514                 assert.notEqual(
 515                         $element.css( 'float' ),
 516                         'right',
 517                         'style is clear'
 518                 );
 519
 520                 mw.loader.implement(
 521                         'test.implement.c',
 522                         function () {
 523                                 assert.equal(
 524                                         $element.css( 'float' ),
 525                                         'right',
 526                                         'style is applied'
 527                                 );
 528                                 QUnit.start();
 529                         },
 530                         {
 531                                 'all': '.mw-test-implement-c { float: right; }'
 532                         },
 533                         {}
 534                 );
 535
 536                 mw.loader.load( [
 537                         'test.implement.c'
 538                 ] );
 539         } );
 540
 541         // Backwards compatibility
 542         QUnit.asyncTest( 'mw.loader.implement( styles={ <media>: [url, ..] } ) (back-compat)', 4, function ( assert ) {
 543                 var $element = $( '<div class="mw-test-implement-d"></div>' ).appendTo( '#qunit-fixture' ),
 544                         $element2 = $( '<div class="mw-test-implement-d2"></div>' ).appendTo( '#qunit-fixture' );
 545
 546                 assert.notEqual(
 547                         $element.css( 'float' ),
 548                         'right',
 549                         'style is clear'
 550                 );
 551                 assert.notEqual(
 552                         $element2.css( 'text-align' ),
 553                         'center',
 554                         'style is clear'
 555                 );
 556
 557                 mw.loader.implement(
 558                         'test.implement.d',
 559                         function () {
 560                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 561
 562                                         assert.notEqual( $element2.css( 'text-align' ), 'center', 'print style is not applied (bug 40500)' );
 563
 564                                         QUnit.start();
 565                                 } );
 566                         },
 567                         {
 568                                 'all': [urlStyleTest( '.mw-test-implement-d', 'float', 'right' )],
 569                                 'print': [urlStyleTest( '.mw-test-implement-d2', 'text-align', 'center' )]
 570                         },
 571                         {}
 572                 );
 573
 574                 mw.loader.load( [
 575                         'test.implement.d'
 576                 ] );
 577         } );
 578
 579         // @import (bug 31676)
 580         QUnit.asyncTest( 'mw.loader.implement( styles has @import)', 5, function ( assert ) {
 581                 var isJsExecuted, $element;
 582
 583                 mw.loader.implement(
 584                         'test.implement.import',
 585                         function () {
 586                                 assert.strictEqual( isJsExecuted, undefined, 'javascript not executed multiple times' );
 587                                 isJsExecuted = true;
 588
 589                                 assert.equal( mw.loader.getState( 'test.implement.import' ), 'ready', 'module state is "ready" while implement() is executing javascript' );
 590
 591                                 $element = $( '<div class="mw-test-implement-import">Foo bar</div>' ).appendTo( '#qunit-fixture' );
 592
 593                                 assert.equal( mw.msg( 'test-foobar' ), 'Hello Foobar, $1!', 'Messages are loaded before javascript execution' );
 594
 595                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 596                                         assert.equal( $element.css( 'text-align' ), 'center',
 597                                                 'CSS styles after the @import rule are working'
 598                                         );
 599
 600                                         QUnit.start();
 601                                 } );
 602                         },
 603                         {
 604                                 'css': [
 605                                         '@import url(\''
 606                                                 + urlStyleTest( '.mw-test-implement-import', 'float', 'right' )
 607                                                 + '\');\n'
 608                                                 + '.mw-test-implement-import { text-align: center; }'
 609                                 ]
 610                         },
 611                         {
 612                                 'test-foobar': 'Hello Foobar, $1!'
 613                         }
 614                 );
 615
 616                 mw.loader.load( 'test.implement' );
 617
 618         } );
 619
 620         QUnit.asyncTest( 'mw.loader.implement( only messages )', 2, function ( assert ) {
 621                 assert.assertFalse( mw.messages.exists( 'bug_29107' ), 'Verify that the test message doesn\'t exist yet' );
 622
 623                 mw.loader.implement( 'test.implement.msgs', [], {}, { 'bug_29107': 'loaded' } );
 624                 mw.loader.using( 'test.implement.msgs', function () {
 625                         QUnit.start();
 626                         assert.ok( mw.messages.exists( 'bug_29107' ), 'Bug 29107: messages-only module should implement ok' );
 627                 }, function () {
 628                         QUnit.start();
 629                         assert.ok( false, 'Error callback fired while implementing "test.implement.msgs" module' );
 630                 } );
 631         } );
 632
 633         QUnit.test( 'mw.loader erroneous indirect dependency', 3, function ( assert ) {
 634                 mw.loader.register( [
 635                         ['test.module1', '0'],
 636                         ['test.module2', '0', ['test.module1']],
 637                         ['test.module3', '0', ['test.module2']]
 638                 ] );
 639                 mw.loader.implement( 'test.module1', function () {
 640                         throw new Error( 'expected' );
 641                 }, {}, {} );
 642                 assert.strictEqual( mw.loader.getState( 'test.module1' ), 'error', 'Expected "error" state for test.module1' );
 643                 assert.strictEqual( mw.loader.getState( 'test.module2' ), 'error', 'Expected "error" state for test.module2' );
 644                 assert.strictEqual( mw.loader.getState( 'test.module3' ), 'error', 'Expected "error" state for test.module3' );
 645         } );
 646
 647         QUnit.test( 'mw.loader out-of-order implementation', 9, function ( assert ) {
 648                 mw.loader.register( [
 649                         ['test.module4', '0'],
 650                         ['test.module5', '0', ['test.module4']],
 651                         ['test.module6', '0', ['test.module5']]
 652                 ] );
 653                 mw.loader.implement( 'test.module4', function () {
 654                 }, {}, {} );
 655                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 656                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 657                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'registered', 'Expected "registered" state for test.module6' );
 658                 mw.loader.implement( 'test.module6', function () {
 659                 }, {}, {} );
 660                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 661                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 662                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'loaded', 'Expected "loaded" state for test.module6' );
 663                 mw.loader.implement( 'test.module5', function () {
 664                 }, {}, {} );
 665                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 666                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'ready', 'Expected "ready" state for test.module5' );
 667                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'ready', 'Expected "ready" state for test.module6' );
 668         } );
 669
 670         QUnit.test( 'mw.loader missing dependency', 13, function ( assert ) {
 671                 mw.loader.register( [
 672                         ['test.module7', '0'],
 673                         ['test.module8', '0', ['test.module7']],
 674                         ['test.module9', '0', ['test.module8']]
 675                 ] );
 676                 mw.loader.implement( 'test.module8', function () {
 677                 }, {}, {} );
 678                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'registered', 'Expected "registered" state for test.module7' );
 679                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'loaded', 'Expected "loaded" state for test.module8' );
 680                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'registered', 'Expected "registered" state for test.module9' );
 681                 mw.loader.state( 'test.module7', 'missing' );
 682                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 683                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 684                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 685                 mw.loader.implement( 'test.module9', function () {
 686                 }, {}, {} );
 687                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 688                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 689                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 690                 mw.loader.using(
 691                         ['test.module7'],
 692                         function () {
 693                                 assert.ok( false, 'Success fired despite missing dependency' );
 694                                 assert.ok( true, 'QUnit expected() count dummy' );
 695                         },
 696                         function ( e, dependencies ) {
 697                                 assert.strictEqual( $.isArray( dependencies ), true, 'Expected array of dependencies' );
 698                                 assert.deepEqual( dependencies, ['test.module7'], 'Error callback called with module test.module7' );
 699                         }
 700                 );
 701                 mw.loader.using(
 702                         ['test.module9'],
 703                         function () {
 704                                 assert.ok( false, 'Success fired despite missing dependency' );
 705                                 assert.ok( true, 'QUnit expected() count dummy' );
 706                         },
 707                         function ( e, dependencies ) {
 708                                 assert.strictEqual( $.isArray( dependencies ), true, 'Expected array of dependencies' );
 709                                 dependencies.sort();
 710                                 assert.deepEqual(
 711                                         dependencies,
 712                                         ['test.module7', 'test.module8', 'test.module9'],
 713                                         'Error callback called with all three modules as dependencies'
 714                                 );
 715                         }
 716                 );
 717         } );
 718
 719         QUnit.asyncTest( 'mw.loader dependency handling', 5, function ( assert ) {
 720                 mw.loader.addSource(
 721                         'testloader',
 722                         {
 723                                 loadScript: QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/load.mock.php' )
 724                         }
 725                 );
 726
 727                 mw.loader.register( [
 728                         // [module, version, dependencies, group, source]
 729                         ['testMissing', '1', [], null, 'testloader'],
 730                         ['testUsesMissing', '1', ['testMissing'], null, 'testloader'],
 731                         ['testUsesNestedMissing', '1', ['testUsesMissing'], null, 'testloader']
 732                 ] );
 733
 734                 function verifyModuleStates() {
 735                         assert.equal( mw.loader.getState( 'testMissing' ), 'missing', 'Module not known to server must have state "missing"' );
 736                         assert.equal( mw.loader.getState( 'testUsesMissing' ), 'error', 'Module with missing dependency must have state "error"' );
 737                         assert.equal( mw.loader.getState( 'testUsesNestedMissing' ), 'error', 'Module with indirect missing dependency must have state "error"' );
 738                 }
 739
 740                 mw.loader.using( ['testUsesNestedMissing'],
 741                         function () {
 742                                 assert.ok( false, 'Error handler should be invoked.' );
 743                                 assert.ok( true ); // Dummy to reach QUnit expect()
 744
 745                                 verifyModuleStates();
 746
 747                                 QUnit.start();
 748                         },
 749                         function ( e, badmodules ) {
 750                                 assert.ok( true, 'Error handler should be invoked.' );
 751                                 // As soon as server spits out state('testMissing', 'missing');
 752                                 // it will bubble up and trigger the error callback.
 753                                 // Therefor the badmodules array is not testUsesMissing or testUsesNestedMissing.
 754                                 assert.deepEqual( badmodules, ['testMissing'], 'Bad modules as expected.' );
 755
 756                                 verifyModuleStates();
 757
 758                                 QUnit.start();
 759                         }
 760                 );
 761         } );
 762
 763         QUnit.asyncTest( 'mw.loader( "//protocol-relative" ) (bug 30825)', 2, function ( assert ) {
 764                 // This bug was actually already fixed in 1.18 and later when discovered in 1.17.
 765                 // Test is for regressions!
 766
 767                 // Forge an URL to the test callback script
 768                 var target = QUnit.fixurl(
 769                         mw.config.get( 'wgServer' ) + mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/qunitOkCall.js'
 770                 );
 771
 772                 // Confirm that mw.loader.load() works with protocol-relative URLs
 773                 target = target.replace( /https?:/, '' );
 774
 775                 assert.equal( target.substr( 0, 2 ), '//',
 776                         'URL must be relative to test relative URLs!'
 777                 );
 778
 779                 // Async!
 780                 // The target calls QUnit.start
 781                 mw.loader.load( target );
 782         } );
 783
 784         QUnit.test( 'mw.html', 13, function ( assert ) {
 785                 assert.throws( function () {
 786                         mw.html.escape();
 787                 }, TypeError, 'html.escape throws a TypeError if argument given is not a string' );
 788
 789                 assert.equal( mw.html.escape( '<mw awesome="awesome" value=\'test\' />' ),
 790                         '&lt;mw awesome=&quot;awesome&quot; value=&#039;test&#039; /&gt;', 'escape() escapes special characters to html entities' );
 791
 792                 assert.equal( mw.html.element(),
 793                         '<undefined/>', 'element() always returns a valid html string (even without arguments)' );
 794
 795                 assert.equal( mw.html.element( 'div' ), '<div/>', 'element() Plain DIV (simple)' );
 796
 797                 assert.equal( mw.html.element( 'div', {}, '' ), '<div></div>', 'element() Basic DIV (simple)' );
 798
 799                 assert.equal(
 800                         mw.html.element(
 801                                 'div', {
 802                                         id: 'foobar'
 803                                 }
 804                         ),
 805                         '<div id="foobar"/>',
 806                         'html.element DIV (attribs)' );
 807
 808                 assert.equal( mw.html.element( 'p', null, 12 ), '<p>12</p>', 'Numbers are valid content and should be casted to a string' );
 809
 810                 assert.equal( mw.html.element( 'p', { title: 12 }, '' ), '<p title="12"></p>', 'Numbers are valid attribute values' );
 811
 812                 // Example from https://www.mediawiki.org/wiki/ResourceLoader/Default_modules#mediaWiki.html
 813                 assert.equal(
 814                         mw.html.element(
 815                                 'div',
 816                                 {},
 817                                 new mw.html.Raw(
 818                                         mw.html.element( 'img', { src: '<' } )
 819                                 )
 820                         ),
 821                         '<div><img src="&lt;"/></div>',
 822                         'Raw inclusion of another element'
 823                 );
 824
 825                 assert.equal(
 826                         mw.html.element(
 827                                 'option', {
 828                                         selected: true
 829                                 }, 'Foo'
 830                         ),
 831                         '<option selected="selected">Foo</option>',
 832                         'Attributes may have boolean values. True copies the attribute name to the value.'
 833                 );
 834
 835                 assert.equal(
 836                         mw.html.element(
 837                                 'option', {
 838                                         value: 'foo',
 839                                         selected: false
 840                                 }, 'Foo'
 841                         ),
 842                         '<option value="foo">Foo</option>',
 843                         'Attributes may have boolean values. False keeps the attribute from output.'
 844                 );
 845
 846                 assert.equal( mw.html.element( 'div',
 847                         null, 'a' ),
 848                         '<div>a</div>',
 849                         'html.element DIV (content)' );
 850
 851                 assert.equal( mw.html.element( 'a',
 852                         { href: 'http://mediawiki.org/w/index.php?title=RL&action=history' }, 'a' ),
 853                         '<a href="http://mediawiki.org/w/index.php?title=RL&amp;action=history">a</a>',
 854                         'html.element DIV (attribs + content)' );
 855
 856         } );
 857
 858         QUnit.test( 'mw.hook', 13, function ( assert ) {
 859                 var hook, add, fire, chars, callback;
 860
 861                 mw.hook( 'test.hook.unfired' ).add( function () {
 862                         assert.ok( false, 'Unfired hook' );
 863                 } );
 864
 865                 mw.hook( 'test.hook.basic' ).add( function () {
 866                         assert.ok( true, 'Basic callback' );
 867                 } );
 868                 mw.hook( 'test.hook.basic' ).fire();
 869
 870                 mw.hook( 'hasOwnProperty' ).add( function () {
 871                         assert.ok( true, 'hook with name of predefined method' );
 872                 } );
 873                 mw.hook( 'hasOwnProperty' ).fire();
 874
 875                 mw.hook( 'test.hook.data' ).add( function ( data1, data2 ) {
 876                         assert.equal( data1, 'example', 'Fire with data (string param)' );
 877                         assert.deepEqual( data2, ['two'], 'Fire with data (array param)' );
 878                 } );
 879                 mw.hook( 'test.hook.data' ).fire( 'example', ['two'] );
 880
 881                 hook = mw.hook( 'test.hook.chainable' );
 882                 assert.strictEqual( hook.add(), hook, 'hook.add is chainable' );
 883                 assert.strictEqual( hook.remove(), hook, 'hook.remove is chainable' );
 884                 assert.strictEqual( hook.fire(), hook, 'hook.fire is chainable' );
 885
 886                 hook = mw.hook( 'test.hook.detach' );
 887                 add = hook.add;
 888                 fire = hook.fire;
 889                 add( function ( x, y ) {
 890                         assert.deepEqual( [x, y], ['x', 'y'], 'Detached (contextless) with data' );
 891                 } );
 892                 fire( 'x', 'y' );
 893
 894                 mw.hook( 'test.hook.fireBefore' ).fire().add( function () {
 895                         assert.ok( true, 'Invoke handler right away if it was fired before' );
 896                 } );
 897
 898                 mw.hook( 'test.hook.fireTwiceBefore' ).fire().fire().add( function () {
 899                         assert.ok( true, 'Invoke handler right away if it was fired before (only last one)' );
 900                 } );
 901
 902                 chars = [];
 903
 904                 mw.hook( 'test.hook.many' )
 905                         .add( function ( chr ) {
 906                                 chars.push( chr );
 907                         } )
 908                         .fire( 'x' ).fire( 'y' ).fire( 'z' )
 909                         .add( function ( chr ) {
 910                                 assert.equal( chr, 'z', 'Adding callback later invokes right away with last data' );
 911                         } );
 912
 913                 assert.deepEqual( chars, ['x', 'y', 'z'], 'Multiple callbacks with multiple fires' );
 914
 915                 chars = [];
 916                 callback = function ( chr ) {
 917                         chars.push( chr );
 918                 };
 919
 920                 mw.hook( 'test.hook.variadic' )
 921                         .add(
 922                                 callback,
 923                                 callback,
 924                                 function ( chr ) {
 925                                         chars.push( chr );
 926                                 },
 927                                 callback
 928                         )
 929                         .fire( 'x' )
 930                         .remove(
 931                                 function () {
 932                                         'not-added';
 933                                 },
 934                                 callback
 935                         )
 936                         .fire( 'y' )
 937                         .remove( callback )
 938                         .fire( 'z' );
 939
 940                 assert.deepEqual(
 941                         chars,
 942                         ['x', 'x', 'x', 'x', 'y', 'z'],
 943                         '"add" and "remove" support variadic arguments. ' +
 944                                 '"add" does not filter unique. ' +
 945                                 '"remove" removes all equal by reference. ' +
 946                                 '"remove" is silent if the function is not found'
 947                 );
 948         } );
 949
 950 }( mediaWiki, jQuery ) );