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

   1 ( function () {
   2         QUnit.module( 'mediawiki.loader', QUnit.newMwEnvironment( {
   3                 setup: function ( assert ) {
   4                         // Expose for load.mock.php
   5                         mw.loader.testFail = function ( reason ) {
   6                                 assert.ok( false, reason );
   7                         };
   8
   9                         this.useStubClock = function () {
  10                                 this.clock = this.sandbox.useFakeTimers();
  11                                 this.tick = function ( forward ) {
  12                                         return this.clock.tick( forward || 1 );
  13                                 };
  14                                 this.sandbox.stub( mw, 'requestIdleCallback', mw.requestIdleCallbackInternal );
  15                         };
  16                 },
  17                 teardown: function () {
  18                         // Teardown for StringSet shim test
  19                         if ( this.nativeSet ) {
  20                                 window.Set = this.nativeSet;
  21                                 mw.redefineFallbacksForTest();
  22                         }
  23                         // Remove any remaining temporary statics
  24                         // exposed for cross-file mocks.
  25                         delete mw.loader.testCallback;
  26                         delete mw.loader.testFail;
  27                 }
  28         } ) );
  29
  30         mw.loader.addSource( {
  31                 testloader:
  32                         QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/load.mock.php' )
  33         } );
  34
  35         /**
  36          * The sync style load test, for @import. This is, in a way, also an open bug for
  37          * ResourceLoader ("execute js after styles are loaded"), but browsers don't offer a
  38          * way to get a callback from when a stylesheet is loaded (that is, including any
  39          * `@import` rules inside). To work around this, we'll have a little time loop to check
  40          * if the styles apply.
  41          *
  42          * Note: This test originally used new Image() and onerror to get a callback
  43          * when the url is loaded, but that is fragile since it doesn't monitor the
  44          * same request as the css @import, and Safari 4 has issues with
  45          * onerror/onload not being fired at all in weird cases like this.
  46          */
  47         function assertStyleAsync( assert, $element, prop, val, fn ) {
  48                 var styleTestStart,
  49                         el = $element.get( 0 ),
  50                         styleTestTimeout = ( QUnit.config.testTimeout || 5000 ) - 200;
  51
  52                 function isCssImportApplied() {
  53                         // Trigger reflow, repaint, redraw, whatever (cross-browser)
  54                         $element.css( 'height' );
  55                         // eslint-disable-next-line no-unused-expressions
  56                         el.innerHTML;
  57                         // eslint-disable-next-line no-self-assign
  58                         el.className = el.className;
  59                         // eslint-disable-next-line no-unused-expressions
  60                         document.documentElement.clientHeight;
  61
  62                         return $element.css( prop ) === val;
  63                 }
  64
  65                 function styleTestLoop() {
  66                         var styleTestSince = new Date().getTime() - styleTestStart;
  67                         // If it is passing or if we timed out, run the real test and stop the loop
  68                         if ( isCssImportApplied() || styleTestSince > styleTestTimeout ) {
  69                                 assert.strictEqual( $element.css( prop ), val,
  70                                         'style "' + prop + ': ' + val + '" from url is applied (after ' + styleTestSince + 'ms)'
  71                                 );
  72
  73                                 if ( fn ) {
  74                                         fn();
  75                                 }
  76
  77                                 return;
  78                         }
  79                         // Otherwise, keep polling
  80                         setTimeout( styleTestLoop );
  81                 }
  82
  83                 // Start the loop
  84                 styleTestStart = new Date().getTime();
  85                 styleTestLoop();
  86         }
  87
  88         function urlStyleTest( selector, prop, val ) {
  89                 return QUnit.fixurl(
  90                         mw.config.get( 'wgScriptPath' ) +
  91                                 '/tests/qunit/data/styleTest.css.php?' +
  92                                 $.param( {
  93                                         selector: selector,
  94                                         prop: prop,
  95                                         val: val
  96                                 } )
  97                 );
  98         }
  99
 100         QUnit.test( '.using( .., Function callback ) Promise', function ( assert ) {
 101                 var script = 0, callback = 0;
 102                 mw.loader.testCallback = function () {
 103                         script++;
 104                 };
 105                 mw.loader.implement( 'test.promise', [ QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/mwLoaderTestCallback.js' ) ] );
 106
 107                 return mw.loader.using( 'test.promise', function () {
 108                         callback++;
 109                 } ).then( function () {
 110                         assert.strictEqual( script, 1, 'module script ran' );
 111                         assert.strictEqual( callback, 1, 'using() callback ran' );
 112                 } );
 113         } );
 114
 115         QUnit.test( 'Prototype method as module name', function ( assert ) {
 116                 var call = 0;
 117                 mw.loader.testCallback = function () {
 118                         call++;
 119                 };
 120                 mw.loader.implement( 'hasOwnProperty', [ QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/mwLoaderTestCallback.js' ) ], {}, {} );
 121
 122                 return mw.loader.using( 'hasOwnProperty', function () {
 123                         assert.strictEqual( call, 1, 'module script ran' );
 124                 } );
 125         } );
 126
 127         // Covers mw.loader#sortDependencies (with native Set if available)
 128         QUnit.test( '.using() - Error: Circular dependency [StringSet default]', function ( assert ) {
 129                 var done = assert.async();
 130
 131                 mw.loader.register( [
 132                         [ 'test.set.circleA', '0', [ 'test.set.circleB' ] ],
 133                         [ 'test.set.circleB', '0', [ 'test.set.circleC' ] ],
 134                         [ 'test.set.circleC', '0', [ 'test.set.circleA' ] ]
 135                 ] );
 136                 mw.loader.using( 'test.set.circleC' ).then(
 137                         function done() {
 138                                 assert.ok( false, 'Unexpected resolution, expected error.' );
 139                         },
 140                         function fail( e ) {
 141                                 assert.ok( /Circular/.test( String( e ) ), 'Detect circular dependency' );
 142                         }
 143                 )
 144                         .always( done );
 145         } );
 146
 147         // @covers mw.loader#sortDependencies (with fallback shim)
 148         QUnit.test( '.using() - Error: Circular dependency [StringSet shim]', function ( assert ) {
 149                 var done = assert.async();
 150
 151                 if ( !window.Set ) {
 152                         assert.expect( 0 );
 153                         done();
 154                         return;
 155                 }
 156
 157                 this.nativeSet = window.Set;
 158                 window.Set = undefined;
 159                 mw.redefineFallbacksForTest();
 160
 161                 mw.loader.register( [
 162                         [ 'test.shim.circleA', '0', [ 'test.shim.circleB' ] ],
 163                         [ 'test.shim.circleB', '0', [ 'test.shim.circleC' ] ],
 164                         [ 'test.shim.circleC', '0', [ 'test.shim.circleA' ] ]
 165                 ] );
 166                 mw.loader.using( 'test.shim.circleC' ).then(
 167                         function done() {
 168                                 assert.ok( false, 'Unexpected resolution, expected error.' );
 169                         },
 170                         function fail( e ) {
 171                                 assert.ok( /Circular/.test( String( e ) ), 'Detect circular dependency' );
 172                         }
 173                 )
 174                         .always( done );
 175         } );
 176
 177         QUnit.test( '.load() - Error: Circular dependency', function ( assert ) {
 178                 var capture = [];
 179                 mw.loader.register( [
 180                         [ 'test.load.circleA', '0', [ 'test.load.circleB' ] ],
 181                         [ 'test.load.circleB', '0', [ 'test.load.circleC' ] ],
 182                         [ 'test.load.circleC', '0', [ 'test.load.circleA' ] ]
 183                 ] );
 184                 this.sandbox.stub( mw, 'track', function ( topic, data ) {
 185                         capture.push( {
 186                                 topic: topic,
 187                                 error: data.exception && data.exception.message,
 188                                 source: data.source
 189                         } );
 190                 } );
 191
 192                 mw.loader.load( 'test.load.circleC' );
 193                 assert.deepEqual(
 194                         [ {
 195                                 topic: 'resourceloader.exception',
 196                                 error: 'Circular reference detected: test.load.circleB -> test.load.circleC',
 197                                 source: 'resolve'
 198                         } ],
 199                         capture,
 200                         'Detect circular dependency'
 201                 );
 202         } );
 203
 204         QUnit.test( '.load() - Error: Circular dependency (direct)', function ( assert ) {
 205                 var capture = [];
 206                 mw.loader.register( [
 207                         [ 'test.load.circleDirect', '0', [ 'test.load.circleDirect' ] ]
 208                 ] );
 209                 this.sandbox.stub( mw, 'track', function ( topic, data ) {
 210                         capture.push( {
 211                                 topic: topic,
 212                                 error: data.exception && data.exception.message,
 213                                 source: data.source
 214                         } );
 215                 } );
 216
 217                 mw.loader.load( 'test.load.circleDirect' );
 218                 assert.deepEqual(
 219                         [ {
 220                                 topic: 'resourceloader.exception',
 221                                 error: 'Circular reference detected: test.load.circleDirect -> test.load.circleDirect',
 222                                 source: 'resolve'
 223                         } ],
 224                         capture,
 225                         'Detect a direct self-dependency'
 226                 );
 227         } );
 228
 229         QUnit.test( '.using() - Error: Unregistered', function ( assert ) {
 230                 var done = assert.async();
 231
 232                 mw.loader.using( 'test.using.unreg' ).then(
 233                         function done() {
 234                                 assert.ok( false, 'Unexpected resolution, expected error.' );
 235                         },
 236                         function fail( e ) {
 237                                 assert.ok( /Unknown/.test( String( e ) ), 'Detect unknown dependency' );
 238                         }
 239                 ).always( done );
 240         } );
 241
 242         QUnit.test( '.load() - Error: Unregistered', function ( assert ) {
 243                 var capture = [];
 244                 this.sandbox.stub( mw, 'track', function ( topic, data ) {
 245                         capture.push( {
 246                                 topic: topic,
 247                                 error: data.exception && data.exception.message,
 248                                 source: data.source
 249                         } );
 250                 } );
 251
 252                 mw.loader.load( 'test.load.unreg' );
 253                 assert.deepEqual(
 254                         [ {
 255                                 topic: 'resourceloader.exception',
 256                                 error: 'Unknown dependency: test.load.unreg',
 257                                 source: 'resolve'
 258                         } ],
 259                         capture
 260                 );
 261         } );
 262
 263         // Regression test for T36853
 264         QUnit.test( '.load() - Error: Missing dependency', function ( assert ) {
 265                 var capture = [];
 266                 this.sandbox.stub( mw, 'track', function ( topic, data ) {
 267                         capture.push( {
 268                                 topic: topic,
 269                                 error: data.exception && data.exception.message,
 270                                 source: data.source
 271                         } );
 272                 } );
 273
 274                 mw.loader.register( [
 275                         [ 'test.load.missingdep1', '0', [ 'test.load.missingdep2' ] ],
 276                         [ 'test.load.missingdep', '0', [ 'test.load.missingdep1' ] ]
 277                 ] );
 278                 mw.loader.load( 'test.load.missingdep' );
 279                 assert.deepEqual(
 280                         [ {
 281                                 topic: 'resourceloader.exception',
 282                                 error: 'Unknown dependency: test.load.missingdep2',
 283                                 source: 'resolve'
 284                         } ],
 285                         capture
 286                 );
 287         } );
 288
 289         QUnit.test( '.implement( styles={ "css": [text, ..] } )', function ( assert ) {
 290                 var $element = $( '<div class="mw-test-implement-a"></div>' ).appendTo( '#qunit-fixture' );
 291
 292                 assert.notEqual(
 293                         $element.css( 'float' ),
 294                         'right',
 295                         'style is clear'
 296                 );
 297
 298                 mw.loader.implement(
 299                         'test.implement.a',
 300                         function () {
 301                                 assert.strictEqual(
 302                                         $element.css( 'float' ),
 303                                         'right',
 304                                         'style is applied'
 305                                 );
 306                         },
 307                         {
 308                                 all: '.mw-test-implement-a { float: right; }'
 309                         }
 310                 );
 311
 312                 return mw.loader.using( 'test.implement.a' );
 313         } );
 314
 315         QUnit.test( '.implement( styles={ "url": { <media>: [url, ..] } } )', function ( assert ) {
 316                 var $element1 = $( '<div class="mw-test-implement-b1"></div>' ).appendTo( '#qunit-fixture' ),
 317                         $element2 = $( '<div class="mw-test-implement-b2"></div>' ).appendTo( '#qunit-fixture' ),
 318                         $element3 = $( '<div class="mw-test-implement-b3"></div>' ).appendTo( '#qunit-fixture' ),
 319                         done = assert.async();
 320
 321                 assert.notEqual(
 322                         $element1.css( 'text-align' ),
 323                         'center',
 324                         'style is clear'
 325                 );
 326                 assert.notEqual(
 327                         $element2.css( 'float' ),
 328                         'left',
 329                         'style is clear'
 330                 );
 331                 assert.notEqual(
 332                         $element3.css( 'text-align' ),
 333                         'right',
 334                         'style is clear'
 335                 );
 336
 337                 mw.loader.implement(
 338                         'test.implement.b',
 339                         function () {
 340                                 // Note: done() must only be called when the entire test is
 341                                 // complete. So, make sure that we don't start until *both*
 342                                 // assertStyleAsync calls have completed.
 343                                 var pending = 2;
 344                                 assertStyleAsync( assert, $element2, 'float', 'left', function () {
 345                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 346
 347                                         pending--;
 348                                         if ( pending === 0 ) {
 349                                                 done();
 350                                         }
 351                                 } );
 352                                 assertStyleAsync( assert, $element3, 'float', 'right', function () {
 353                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 354
 355                                         pending--;
 356                                         if ( pending === 0 ) {
 357                                                 done();
 358                                         }
 359                                 } );
 360                         },
 361                         {
 362                                 url: {
 363                                         print: [ urlStyleTest( '.mw-test-implement-b1', 'text-align', 'center' ) ],
 364                                         screen: [
 365                                                 // T42834: Make sure it actually works with more than 1 stylesheet reference
 366                                                 urlStyleTest( '.mw-test-implement-b2', 'float', 'left' ),
 367                                                 urlStyleTest( '.mw-test-implement-b3', 'float', 'right' )
 368                                         ]
 369                                 }
 370                         }
 371                 );
 372
 373                 mw.loader.load( 'test.implement.b' );
 374         } );
 375
 376         // Backwards compatibility
 377         QUnit.test( '.implement( styles={ <media>: text } ) (back-compat)', function ( assert ) {
 378                 var $element = $( '<div class="mw-test-implement-c"></div>' ).appendTo( '#qunit-fixture' );
 379
 380                 assert.notEqual(
 381                         $element.css( 'float' ),
 382                         'right',
 383                         'style is clear'
 384                 );
 385
 386                 mw.loader.implement(
 387                         'test.implement.c',
 388                         function () {
 389                                 assert.strictEqual(
 390                                         $element.css( 'float' ),
 391                                         'right',
 392                                         'style is applied'
 393                                 );
 394                         },
 395                         {
 396                                 all: '.mw-test-implement-c { float: right; }'
 397                         }
 398                 );
 399
 400                 return mw.loader.using( 'test.implement.c' );
 401         } );
 402
 403         // Backwards compatibility
 404         QUnit.test( '.implement( styles={ <media>: [url, ..] } ) (back-compat)', function ( assert ) {
 405                 var $element = $( '<div class="mw-test-implement-d"></div>' ).appendTo( '#qunit-fixture' ),
 406                         $element2 = $( '<div class="mw-test-implement-d2"></div>' ).appendTo( '#qunit-fixture' ),
 407                         done = assert.async();
 408
 409                 assert.notEqual(
 410                         $element.css( 'float' ),
 411                         'right',
 412                         'style is clear'
 413                 );
 414                 assert.notEqual(
 415                         $element2.css( 'text-align' ),
 416                         'center',
 417                         'style is clear'
 418                 );
 419
 420                 mw.loader.implement(
 421                         'test.implement.d',
 422                         function () {
 423                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 424                                         assert.notEqual( $element2.css( 'text-align' ), 'center', 'print style is not applied (T42500)' );
 425                                         done();
 426                                 } );
 427                         },
 428                         {
 429                                 all: [ urlStyleTest( '.mw-test-implement-d', 'float', 'right' ) ],
 430                                 print: [ urlStyleTest( '.mw-test-implement-d2', 'text-align', 'center' ) ]
 431                         }
 432                 );
 433
 434                 mw.loader.load( 'test.implement.d' );
 435         } );
 436
 437         QUnit.test( '.implement( messages before script )', function ( assert ) {
 438                 mw.loader.implement(
 439                         'test.implement.order',
 440                         function () {
 441                                 assert.strictEqual( mw.loader.getState( 'test.implement.order' ), 'executing', 'state during script execution' );
 442                                 assert.strictEqual( mw.msg( 'test-foobar' ), 'Hello Foobar, $1!', 'messages load before script execution' );
 443                         },
 444                         {},
 445                         {
 446                                 'test-foobar': 'Hello Foobar, $1!'
 447                         }
 448                 );
 449
 450                 return mw.loader.using( 'test.implement.order' ).then( function () {
 451                         assert.strictEqual( mw.loader.getState( 'test.implement.order' ), 'ready', 'final success state' );
 452                 } );
 453         } );
 454
 455         // @import (T33676)
 456         QUnit.test( '.implement( styles with @import )', function ( assert ) {
 457                 var $element,
 458                         done = assert.async();
 459
 460                 mw.loader.implement(
 461                         'test.implement.import',
 462                         function () {
 463                                 $element = $( '<div class="mw-test-implement-import">Foo bar</div>' ).appendTo( '#qunit-fixture' );
 464
 465                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 466                                         assert.strictEqual( $element.css( 'text-align' ), 'center',
 467                                                 'CSS styles after the @import rule are working'
 468                                         );
 469
 470                                         done();
 471                                 } );
 472                         },
 473                         {
 474                                 css: [
 475                                         '@import url(\''
 476                                                 + urlStyleTest( '.mw-test-implement-import', 'float', 'right' )
 477                                                 + '\');\n'
 478                                                 + '.mw-test-implement-import { text-align: center; }'
 479                                 ]
 480                         }
 481                 );
 482
 483                 return mw.loader.using( 'test.implement.import' );
 484         } );
 485
 486         QUnit.test( '.implement( dependency with styles )', function ( assert ) {
 487                 var $element = $( '<div class="mw-test-implement-e"></div>' ).appendTo( '#qunit-fixture' ),
 488                         $element2 = $( '<div class="mw-test-implement-e2"></div>' ).appendTo( '#qunit-fixture' );
 489
 490                 assert.notEqual(
 491                         $element.css( 'float' ),
 492                         'right',
 493                         'style is clear'
 494                 );
 495                 assert.notEqual(
 496                         $element2.css( 'float' ),
 497                         'left',
 498                         'style is clear'
 499                 );
 500
 501                 mw.loader.register( [
 502                         [ 'test.implement.e', '0', [ 'test.implement.e2' ] ],
 503                         [ 'test.implement.e2', '0' ]
 504                 ] );
 505
 506                 mw.loader.implement(
 507                         'test.implement.e',
 508                         function () {
 509                                 assert.strictEqual(
 510                                         $element.css( 'float' ),
 511                                         'right',
 512                                         'Depending module\'s style is applied'
 513                                 );
 514                         },
 515                         {
 516                                 all: '.mw-test-implement-e { float: right; }'
 517                         }
 518                 );
 519
 520                 mw.loader.implement(
 521                         'test.implement.e2',
 522                         function () {
 523                                 assert.strictEqual(
 524                                         $element2.css( 'float' ),
 525                                         'left',
 526                                         'Dependency\'s style is applied'
 527                                 );
 528                         },
 529                         {
 530                                 all: '.mw-test-implement-e2 { float: left; }'
 531                         }
 532                 );
 533
 534                 return mw.loader.using( 'test.implement.e' );
 535         } );
 536
 537         QUnit.test( '.implement( only scripts )', function ( assert ) {
 538                 mw.loader.implement( 'test.onlyscripts', function () {} );
 539                 return mw.loader.using( 'test.onlyscripts', function () {
 540                         assert.strictEqual( mw.loader.getState( 'test.onlyscripts' ), 'ready' );
 541                 } );
 542         } );
 543
 544         QUnit.test( '.implement( only messages )', function ( assert ) {
 545                 assert.assertFalse( mw.messages.exists( 'T31107' ), 'Verify that the test message doesn\'t exist yet' );
 546
 547                 mw.loader.implement( 'test.implement.msgs', [], {}, { T31107: 'loaded' } );
 548
 549                 return mw.loader.using( 'test.implement.msgs', function () {
 550                         assert.ok( mw.messages.exists( 'T31107' ), 'T31107: messages-only module should implement ok' );
 551                 } );
 552         } );
 553
 554         QUnit.test( '.implement( empty )', function ( assert ) {
 555                 mw.loader.implement( 'test.empty' );
 556                 return mw.loader.using( 'test.empty', function () {
 557                         assert.strictEqual( mw.loader.getState( 'test.empty' ), 'ready' );
 558                 } );
 559         } );
 560
 561         QUnit.test( '.addSource()', function ( assert ) {
 562                 mw.loader.addSource( { testsource1: 'https://1.test/src' } );
 563
 564                 assert.throws( function () {
 565                         mw.loader.addSource( { testsource1: 'https://1.test/src' } );
 566                 }, /already registered/, 'duplicate pair from addSource(Object)' );
 567
 568                 assert.throws( function () {
 569                         mw.loader.addSource( { testsource1: 'https://1.test/src-diff' } );
 570                 }, /already registered/, 'duplicate ID from addSource(Object)' );
 571         } );
 572
 573         // @covers mw.loader#batchRequest
 574         // This is a regression test because in the past we called getCombinedVersion()
 575         // for all requested modules, before url splitting took place.
 576         // Discovered as part of T188076, but not directly related.
 577         QUnit.test( 'Url composition (modules considered for version)', function ( assert ) {
 578                 mw.loader.register( [
 579                         // [module, version, dependencies, group, source]
 580                         [ 'testUrlInc', 'url', [], null, 'testloader' ],
 581                         [ 'testUrlIncDump', 'dump', [], null, 'testloader' ]
 582                 ] );
 583
 584                 mw.config.set( 'wgResourceLoaderMaxQueryLength', 10 );
 585
 586                 return mw.loader.using( [ 'testUrlIncDump', 'testUrlInc' ] ).then( function ( require ) {
 587                         assert.propEqual(
 588                                 require( 'testUrlIncDump' ).query,
 589                                 {
 590                                         modules: 'testUrlIncDump',
 591                                         // Expected: Wrapped hash just for this one module
 592                                         //   $hash = hash( 'fnv132', 'dump');
 593                                         //   base_convert( $hash, 16, 36 ); // "13e9zzn"
 594                                         // Previously: Wrapped hash for both modules, despite being in separate requests
 595                                         //   $hash = hash( 'fnv132', 'urldump' );
 596                                         //   base_convert( $hash, 16, 36 ); // "18kz9ca"
 597                                         version: '13e9zzn'
 598                                 },
 599                                 'Query parameters'
 600                         );
 601
 602                         assert.strictEqual( mw.loader.getState( 'testUrlInc' ), 'ready', 'testUrlInc also loaded' );
 603                 } );
 604         } );
 605
 606         // @covers mw.loader#batchRequest
 607         // @covers mw.loader#buildModulesString
 608         QUnit.test( 'Url composition (order of modules for version) – T188076', function ( assert ) {
 609                 mw.loader.register( [
 610                         // [module, version, dependencies, group, source]
 611                         [ 'testUrlOrder', 'url', [], null, 'testloader' ],
 612                         [ 'testUrlOrder.a', '1', [], null, 'testloader' ],
 613                         [ 'testUrlOrder.b', '2', [], null, 'testloader' ],
 614                         [ 'testUrlOrderDump', 'dump', [], null, 'testloader' ]
 615                 ] );
 616
 617                 return mw.loader.using( [
 618                         'testUrlOrderDump',
 619                         'testUrlOrder.b',
 620                         'testUrlOrder.a',
 621                         'testUrlOrder'
 622                 ] ).then( function ( require ) {
 623                         assert.propEqual(
 624                                 require( 'testUrlOrderDump' ).query,
 625                                 {
 626                                         modules: 'testUrlOrder,testUrlOrderDump|testUrlOrder.a,b',
 627                                         // Expected: Combined in order after string packing
 628                                         //   $hash = hash( 'fnv132', 'urldump12' );
 629                                         //   base_convert( $hash, 16, 36 ); // "1knqzan"
 630                                         // Previously: Combined in order of before string packing
 631                                         //   $hash = hash( 'fnv132', 'url12dump' );
 632                                         //   base_convert( $hash, 16, 36 ); // "11eo3in"
 633                                         version: '1knqzan'
 634                                 },
 635                                 'Query parameters'
 636                         );
 637                 } );
 638         } );
 639
 640         QUnit.test( 'Broken indirect dependency', function ( assert ) {
 641                 this.useStubClock();
 642
 643                 // Don't actually emit an error event
 644                 this.sandbox.stub( mw, 'track' );
 645
 646                 mw.loader.register( [
 647                         [ 'test.module1', '0' ],
 648                         [ 'test.module2', '0', [ 'test.module1' ] ],
 649                         [ 'test.module3', '0', [ 'test.module2' ] ]
 650                 ] );
 651                 mw.loader.implement( 'test.module1', function () {
 652                         throw new Error( 'expected' );
 653                 }, {}, {} );
 654                 this.tick();
 655
 656                 assert.strictEqual( mw.loader.getState( 'test.module1' ), 'error', 'Expected "error" state for test.module1' );
 657                 assert.strictEqual( mw.loader.getState( 'test.module2' ), 'error', 'Expected "error" state for test.module2' );
 658                 assert.strictEqual( mw.loader.getState( 'test.module3' ), 'error', 'Expected "error" state for test.module3' );
 659
 660                 assert.strictEqual( mw.track.callCount, 1 );
 661         } );
 662
 663         QUnit.test( 'Out-of-order implementation', function ( assert ) {
 664                 this.useStubClock();
 665
 666                 mw.loader.register( [
 667                         [ 'test.module4', '0' ],
 668                         [ 'test.module5', '0', [ 'test.module4' ] ],
 669                         [ 'test.module6', '0', [ 'test.module5' ] ]
 670                 ] );
 671
 672                 mw.loader.implement( 'test.module4', function () {} );
 673                 this.tick();
 674                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 675                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 676                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'registered', 'Expected "registered" state for test.module6' );
 677
 678                 mw.loader.implement( 'test.module6', function () {} );
 679                 this.tick();
 680                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 681                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 682                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'loaded', 'Expected "loaded" state for test.module6' );
 683
 684                 mw.loader.implement( 'test.module5', function () {} );
 685                 this.tick();
 686                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 687                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'ready', 'Expected "ready" state for test.module5' );
 688                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'ready', 'Expected "ready" state for test.module6' );
 689         } );
 690
 691         QUnit.test( 'Missing dependency', function ( assert ) {
 692                 this.useStubClock();
 693
 694                 mw.loader.register( [
 695                         [ 'test.module7', '0' ],
 696                         [ 'test.module8', '0', [ 'test.module7' ] ],
 697                         [ 'test.module9', '0', [ 'test.module8' ] ]
 698                 ] );
 699
 700                 mw.loader.implement( 'test.module8', function () {} );
 701                 this.tick();
 702                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'registered', 'Expected "registered" state for test.module7' );
 703                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'loaded', 'Expected "loaded" state for test.module8' );
 704                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'registered', 'Expected "registered" state for test.module9' );
 705
 706                 mw.loader.state( { 'test.module7': 'missing' } );
 707                 this.tick();
 708                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 709                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 710                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 711
 712                 mw.loader.implement( 'test.module9', function () {} );
 713                 this.tick();
 714                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 715                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 716                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 717
 718                 // Restore clock for QUnit and $.Deferred internals
 719                 this.clock.restore();
 720                 return mw.loader.using( [ 'test.module7' ] ).then(
 721                         function () {
 722                                 throw new Error( 'Success fired despite missing dependency' );
 723                         },
 724                         function ( e, dependencies ) {
 725                                 assert.strictEqual( Array.isArray( dependencies ), true, 'Expected array of dependencies' );
 726                                 assert.deepEqual(
 727                                         dependencies,
 728                                         [ 'jquery', 'mediawiki.base', 'test.module7' ],
 729                                         'Error callback called with module test.module7'
 730                                 );
 731                         }
 732                 ).then( function () {
 733                         return mw.loader.using( [ 'test.module9' ] );
 734                 } ).then(
 735                         function () {
 736                                 throw new Error( 'Success fired despite missing dependency' );
 737                         },
 738                         function ( e, dependencies ) {
 739                                 assert.strictEqual( Array.isArray( dependencies ), true, 'Expected array of dependencies' );
 740                                 dependencies.sort();
 741                                 assert.deepEqual(
 742                                         dependencies,
 743                                         [ 'jquery', 'mediawiki.base', 'test.module7', 'test.module8', 'test.module9' ],
 744                                         'Error callback called with all three modules as dependencies'
 745                                 );
 746                         }
 747                 );
 748         } );
 749
 750         QUnit.test( 'Dependency handling', function ( assert ) {
 751                 mw.loader.register( [
 752                         // [module, version, dependencies, group, source]
 753                         [ 'testMissing', '1', [], null, 'testloader' ],
 754                         [ 'testUsesMissing', '1', [ 'testMissing' ], null, 'testloader' ],
 755                         [ 'testUsesNestedMissing', '1', [ 'testUsesMissing' ], null, 'testloader' ]
 756                 ] );
 757
 758                 function verifyModuleStates() {
 759                         assert.strictEqual( mw.loader.getState( 'testMissing' ), 'missing', 'Module "testMissing" state' );
 760                         assert.strictEqual( mw.loader.getState( 'testUsesMissing' ), 'error', 'Module "testUsesMissing" state' );
 761                         assert.strictEqual( mw.loader.getState( 'testUsesNestedMissing' ), 'error', 'Module "testUsesNestedMissing" state' );
 762                 }
 763
 764                 return mw.loader.using( [ 'testUsesNestedMissing' ] ).then(
 765                         function () {
 766                                 verifyModuleStates();
 767                                 throw new Error( 'Error handler should be invoked.' );
 768                         },
 769                         function ( e, modules ) {
 770                                 // When the server sets state of 'testMissing' to 'missing'
 771                                 // it should bubble up and trigger the error callback of the job for 'testUsesNestedMissing'.
 772                                 assert.strictEqual( modules.indexOf( 'testMissing' ) !== -1, true, 'Triggered by testMissing.' );
 773
 774                                 verifyModuleStates();
 775                         }
 776                 );
 777         } );
 778
 779         QUnit.test( 'Skip-function handling', function ( assert ) {
 780                 mw.loader.register( [
 781                         // [module, version, dependencies, group, source, skip]
 782                         [ 'testSkipped', '1', [], null, 'testloader', 'return true;' ],
 783                         [ 'testNotSkipped', '1', [], null, 'testloader', 'return false;' ],
 784                         [ 'testUsesSkippable', '1', [ 'testSkipped', 'testNotSkipped' ], null, 'testloader' ]
 785                 ] );
 786
 787                 return mw.loader.using( [ 'testUsesSkippable' ] ).then(
 788                         function () {
 789                                 assert.strictEqual( mw.loader.getState( 'testSkipped' ), 'ready', 'Skipped module' );
 790                                 assert.strictEqual( mw.loader.getState( 'testNotSkipped' ), 'ready', 'Regular module' );
 791                                 assert.strictEqual( mw.loader.getState( 'testUsesSkippable' ), 'ready', 'Regular module with skippable dependency' );
 792                         },
 793                         function ( e, badmodules ) {
 794                                 // Should not fail and QUnit would already catch this,
 795                                 // but add a handler anyway to report details from 'badmodules
 796                                 assert.deepEqual( badmodules, [], 'Bad modules' );
 797                         }
 798                 );
 799         } );
 800
 801         // This bug was actually already fixed in 1.18 and later when discovered in 1.17.
 802         QUnit.test( '.load( "//protocol-relative" ) - T32825', function ( assert ) {
 803                 var target,
 804                         done = assert.async();
 805
 806                 // URL to the callback script
 807                 target = QUnit.fixurl(
 808                         mw.config.get( 'wgServer' ) + mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/mwLoaderTestCallback.js'
 809                 );
 810                 // Ensure a protocol-relative URL for this test
 811                 target = target.replace( /https?:/, '' );
 812                 assert.strictEqual( target.slice( 0, 2 ), '//', 'URL is protocol-relative' );
 813
 814                 mw.loader.testCallback = function () {
 815                         // Ensure once, delete now
 816                         delete mw.loader.testCallback;
 817                         assert.ok( true, 'callback' );
 818                         done();
 819                 };
 820
 821                 // Go!
 822                 mw.loader.load( target );
 823         } );
 824
 825         QUnit.test( '.load( "/absolute-path" )', function ( assert ) {
 826                 var target,
 827                         done = assert.async();
 828
 829                 // URL to the callback script
 830                 target = QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/mwLoaderTestCallback.js' );
 831                 assert.strictEqual( target.slice( 0, 1 ), '/', 'URL is relative to document root' );
 832
 833                 mw.loader.testCallback = function () {
 834                         // Ensure once, delete now
 835                         delete mw.loader.testCallback;
 836                         assert.ok( true, 'callback' );
 837                         done();
 838                 };
 839
 840                 // Go!
 841                 mw.loader.load( target );
 842         } );
 843
 844         QUnit.test( 'Empty string module name - T28804', function ( assert ) {
 845                 var done = false;
 846
 847                 assert.strictEqual( mw.loader.getState( '' ), null, 'State (unregistered)' );
 848
 849                 mw.loader.register( '', 'v1' );
 850                 assert.strictEqual( mw.loader.getState( '' ), 'registered', 'State (registered)' );
 851                 assert.strictEqual( mw.loader.getVersion( '' ), 'v1', 'Version' );
 852
 853                 mw.loader.implement( '', function () {
 854                         done = true;
 855                 } );
 856
 857                 return mw.loader.using( '', function () {
 858                         assert.strictEqual( done, true, 'script ran' );
 859                         assert.strictEqual( mw.loader.getState( '' ), 'ready', 'State (ready)' );
 860                 } );
 861         } );
 862
 863         QUnit.test( 'Executing race - T112232', function ( assert ) {
 864                 var done = false;
 865
 866                 // The red herring schedules its CSS buffer first. In T112232, a bug in the
 867                 // state machine would cause the job for testRaceLoadMe to run with an earlier job.
 868                 mw.loader.implement(
 869                         'testRaceRedHerring',
 870                         function () {},
 871                         { css: [ '.mw-testRaceRedHerring {}' ] }
 872                 );
 873                 mw.loader.implement(
 874                         'testRaceLoadMe',
 875                         function () {
 876                                 done = true;
 877                         },
 878                         { css: [ '.mw-testRaceLoadMe { float: left; }' ] }
 879                 );
 880
 881                 mw.loader.load( [ 'testRaceRedHerring', 'testRaceLoadMe' ] );
 882                 return mw.loader.using( 'testRaceLoadMe', function () {
 883                         assert.strictEqual( done, true, 'script ran' );
 884                         assert.strictEqual( mw.loader.getState( 'testRaceLoadMe' ), 'ready', 'state' );
 885                 } );
 886         } );
 887
 888         QUnit.test( 'Stale response caching - T117587', function ( assert ) {
 889                 var count = 0;
 890                 // Enable store and stub timeout/idle scheduling
 891                 this.sandbox.stub( mw.loader.store, 'enabled', true );
 892                 this.sandbox.stub( window, 'setTimeout', function ( fn ) {
 893                         fn();
 894                 } );
 895                 this.sandbox.stub( mw, 'requestIdleCallback', function ( fn ) {
 896                         fn();
 897                 } );
 898
 899                 mw.loader.register( 'test.stale', 'v2' );
 900                 assert.strictEqual( mw.loader.store.get( 'test.stale' ), false, 'Not in store' );
 901
 902                 mw.loader.implement( 'test.stale@v1', function () {
 903                         count++;
 904                 } );
 905
 906                 return mw.loader.using( 'test.stale' )
 907                         .then( function () {
 908                                 assert.strictEqual( count, 1 );
 909                                 // After implementing, registry contains version as implemented by the response.
 910                                 assert.strictEqual( mw.loader.getVersion( 'test.stale' ), 'v1', 'Override version' );
 911                                 assert.strictEqual( mw.loader.getState( 'test.stale' ), 'ready' );
 912                                 assert.strictEqual( typeof mw.loader.store.get( 'test.stale' ), 'string', 'In store' );
 913                         } )
 914                         .then( function () {
 915                                 // Reset run time, but keep mw.loader.store
 916                                 mw.loader.moduleRegistry[ 'test.stale' ].script = undefined;
 917                                 mw.loader.moduleRegistry[ 'test.stale' ].state = 'registered';
 918                                 mw.loader.moduleRegistry[ 'test.stale' ].version = 'v2';
 919
 920                                 // Module was stored correctly as v1
 921                                 // On future navigations, it will be ignored until evicted
 922                                 assert.strictEqual( mw.loader.store.get( 'test.stale' ), false, 'Not in store' );
 923                         } );
 924         } );
 925
 926         QUnit.test( 'Stale response caching - backcompat', function ( assert ) {
 927                 var script = 0;
 928                 // Enable store and stub timeout/idle scheduling
 929                 this.sandbox.stub( mw.loader.store, 'enabled', true );
 930                 this.sandbox.stub( window, 'setTimeout', function ( fn ) {
 931                         fn();
 932                 } );
 933                 this.sandbox.stub( mw, 'requestIdleCallback', function ( fn ) {
 934                         fn();
 935                 } );
 936
 937                 mw.loader.register( 'test.stalebc', 'v2' );
 938                 assert.strictEqual( mw.loader.store.get( 'test.stalebc' ), false, 'Not in store' );
 939
 940                 mw.loader.implement( 'test.stalebc', function () {
 941                         script++;
 942                 } );
 943
 944                 return mw.loader.using( 'test.stalebc' )
 945                         .then( function () {
 946                                 assert.strictEqual( script, 1, 'module script ran' );
 947                                 assert.strictEqual( mw.loader.getState( 'test.stalebc' ), 'ready' );
 948                                 assert.strictEqual( typeof mw.loader.store.get( 'test.stalebc' ), 'string', 'In store' );
 949                         } )
 950                         .then( function () {
 951                                 // Reset run time, but keep mw.loader.store
 952                                 mw.loader.moduleRegistry[ 'test.stalebc' ].script = undefined;
 953                                 mw.loader.moduleRegistry[ 'test.stalebc' ].state = 'registered';
 954                                 mw.loader.moduleRegistry[ 'test.stalebc' ].version = 'v2';
 955
 956                                 // Legacy behaviour is storing under the expected version,
 957                                 // which woudl lead to whitewashing and stale values (T117587).
 958                                 assert.ok( mw.loader.store.get( 'test.stalebc' ), 'In store' );
 959                         } );
 960         } );
 961
 962         QUnit.test( 'require()', function ( assert ) {
 963                 mw.loader.register( [
 964                         [ 'test.require1', '0' ],
 965                         [ 'test.require2', '0' ],
 966                         [ 'test.require3', '0' ],
 967                         [ 'test.require4', '0', [ 'test.require3' ] ]
 968                 ] );
 969                 mw.loader.implement( 'test.require1', function () {} );
 970                 mw.loader.implement( 'test.require2', function ( $, jQuery, require, module ) {
 971                         module.exports = 1;
 972                 } );
 973                 mw.loader.implement( 'test.require3', function ( $, jQuery, require, module ) {
 974                         module.exports = function () {
 975                                 return 'hello world';
 976                         };
 977                 } );
 978                 mw.loader.implement( 'test.require4', function ( $, jQuery, require, module ) {
 979                         var other = require( 'test.require3' );
 980                         module.exports = {
 981                                 pizza: function () {
 982                                         return other();
 983                                 }
 984                         };
 985                 } );
 986                 return mw.loader.using( [ 'test.require1', 'test.require2', 'test.require3', 'test.require4' ] ).then( function ( require ) {
 987                         var module1, module2, module3, module4;
 988
 989                         module1 = require( 'test.require1' );
 990                         module2 = require( 'test.require2' );
 991                         module3 = require( 'test.require3' );
 992                         module4 = require( 'test.require4' );
 993
 994                         assert.strictEqual( typeof module1, 'object', 'export of module with no export' );
 995                         assert.strictEqual( module2, 1, 'export a number' );
 996                         assert.strictEqual( module3(), 'hello world', 'export a function' );
 997                         assert.strictEqual( typeof module4.pizza, 'function', 'export an object' );
 998                         assert.strictEqual( module4.pizza(), 'hello world', 'module can require other modules' );
 999
1000                         assert.throws( function () {
1001                                 require( '_badmodule' );
1002                         }, /is not loaded/, 'Requesting non-existent modules throws error.' );
1003                 } );
1004         } );
1005
1006         QUnit.test( 'require() in debug mode', function ( assert ) {
1007                 var path = mw.config.get( 'wgScriptPath' );
1008                 mw.loader.register( [
1009                         [ 'test.require.define', '0' ],
1010                         [ 'test.require.callback', '0', [ 'test.require.define' ] ]
1011                 ] );
1012                 mw.loader.implement( 'test.require.callback', [ QUnit.fixurl( path + '/tests/qunit/data/requireCallMwLoaderTestCallback.js' ) ] );
1013                 mw.loader.implement( 'test.require.define', [ QUnit.fixurl( path + '/tests/qunit/data/defineCallMwLoaderTestCallback.js' ) ] );
1014
1015                 return mw.loader.using( 'test.require.callback' ).then( function ( require ) {
1016                         var cb = require( 'test.require.callback' );
1017                         assert.strictEqual( cb.immediate, 'Defined.', 'module.exports and require work in debug mode' );
1018                         // Must use try-catch because cb.later() will throw if require is undefined,
1019                         // which doesn't work well inside Deferred.then() when using jQuery 1.x with QUnit
1020                         try {
1021                                 assert.strictEqual( cb.later(), 'Defined.', 'require works asynchrously in debug mode' );
1022                         } catch ( e ) {
1023                                 assert.strictEqual( String( e ), null, 'require works asynchrously in debug mode' );
1024                         }
1025                 } );
1026         } );
1027
1028         QUnit.test( 'Implicit dependencies', function ( assert ) {
1029                 var user = 0,
1030                         site = 0,
1031                         siteFromUser = 0;
1032
1033                 mw.loader.implement(
1034                         'site',
1035                         function () {
1036                                 site++;
1037                         }
1038                 );
1039                 mw.loader.implement(
1040                         'user',
1041                         function () {
1042                                 user++;
1043                                 siteFromUser = site;
1044                         }
1045                 );
1046
1047                 return mw.loader.using( 'user', function () {
1048                         assert.strictEqual( site, 1, 'site module' );
1049                         assert.strictEqual( user, 1, 'user module' );
1050                         assert.strictEqual( siteFromUser, 1, 'site ran before user' );
1051                 } ).always( function () {
1052                         // Reset
1053                         mw.loader.moduleRegistry[ 'site' ].state = 'registered';
1054                         mw.loader.moduleRegistry[ 'user' ].state = 'registered';
1055                 } );
1056         } );
1057
1058 }() );