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