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

   1 ( function ( mw, $ ) {
   2         QUnit.module( 'mediawiki (mw.loader)', QUnit.newMwEnvironment( {
   3                 setup: function () {
   4                         mw.loader.store.enabled = false;
   5                 },
   6                 teardown: function () {
   7                         mw.loader.store.enabled = false;
   8                 }
   9         } ) );
  10
  11         mw.loader.addSource(
  12                 'testloader',
  13                 QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/load.mock.php' )
  14         );
  15
  16         /**
  17          * The sync style load test (for @import). This is, in a way, also an open bug for
  18          * ResourceLoader ("execute js after styles are loaded"), but browsers don't offer a
  19          * way to get a callback from when a stylesheet is loaded (that is, including any
  20          * `@import` rules inside). To work around this, we'll have a little time loop to check
  21          * if the styles apply.
  22          *
  23          * Note: This test originally used new Image() and onerror to get a callback
  24          * when the url is loaded, but that is fragile since it doesn't monitor the
  25          * same request as the css @import, and Safari 4 has issues with
  26          * onerror/onload not being fired at all in weird cases like this.
  27          */
  28         function assertStyleAsync( assert, $element, prop, val, fn ) {
  29                 var styleTestStart,
  30                         el = $element.get( 0 ),
  31                         styleTestTimeout = ( QUnit.config.testTimeout || 5000 ) - 200;
  32
  33                 function isCssImportApplied() {
  34                         // Trigger reflow, repaint, redraw, whatever (cross-browser)
  35                         var x = $element.css( 'height' );
  36                         x = el.innerHTML;
  37                         el.className = el.className;
  38                         x = document.documentElement.clientHeight;
  39
  40                         return $element.css( prop ) === val;
  41                 }
  42
  43                 function styleTestLoop() {
  44                         var styleTestSince = new Date().getTime() - styleTestStart;
  45                         // If it is passing or if we timed out, run the real test and stop the loop
  46                         if ( isCssImportApplied() || styleTestSince > styleTestTimeout ) {
  47                                 assert.equal( $element.css( prop ), val,
  48                                         'style "' + prop + ': ' + val + '" from url is applied (after ' + styleTestSince + 'ms)'
  49                                 );
  50
  51                                 if ( fn ) {
  52                                         fn();
  53                                 }
  54
  55                                 return;
  56                         }
  57                         // Otherwise, keep polling
  58                         setTimeout( styleTestLoop );
  59                 }
  60
  61                 // Start the loop
  62                 styleTestStart = new Date().getTime();
  63                 styleTestLoop();
  64         }
  65
  66         function urlStyleTest( selector, prop, val ) {
  67                 return QUnit.fixurl(
  68                         mw.config.get( 'wgScriptPath' ) +
  69                                 '/tests/qunit/data/styleTest.css.php?' +
  70                                 $.param( {
  71                                         selector: selector,
  72                                         prop: prop,
  73                                         val: val
  74                                 } )
  75                 );
  76         }
  77
  78         QUnit.test( 'Basic', 2, function ( assert ) {
  79                 var isAwesomeDone;
  80
  81                 mw.loader.testCallback = function () {
  82                         assert.strictEqual( isAwesomeDone, undefined, 'Implementing module is.awesome: isAwesomeDone should still be undefined' );
  83                         isAwesomeDone = true;
  84                 };
  85
  86                 mw.loader.implement( 'test.callback', [ QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/callMwLoaderTestCallback.js' ) ] );
  87
  88                 return mw.loader.using( 'test.callback', function () {
  89                         assert.strictEqual( isAwesomeDone, true, 'test.callback module should\'ve caused isAwesomeDone to be true' );
  90                         delete mw.loader.testCallback;
  91
  92                 }, function () {
  93                         assert.ok( false, 'Error callback fired while loader.using "test.callback" module' );
  94                 } );
  95         } );
  96
  97         QUnit.test( 'Object method as module name', 2, function ( assert ) {
  98                 var isAwesomeDone;
  99
 100                 mw.loader.testCallback = function () {
 101                         assert.strictEqual( isAwesomeDone, undefined, 'Implementing module hasOwnProperty: isAwesomeDone should still be undefined' );
 102                         isAwesomeDone = true;
 103                 };
 104
 105                 mw.loader.implement( 'hasOwnProperty', [ QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/callMwLoaderTestCallback.js' ) ], {}, {} );
 106
 107                 return mw.loader.using( 'hasOwnProperty', function () {
 108                         assert.strictEqual( isAwesomeDone, true, 'hasOwnProperty module should\'ve caused isAwesomeDone to be true' );
 109                         delete mw.loader.testCallback;
 110
 111                 }, function () {
 112                         assert.ok( false, 'Error callback fired while loader.using "hasOwnProperty" module' );
 113                 } );
 114         } );
 115
 116         QUnit.test( '.using( .. ) Promise', 2, function ( assert ) {
 117                 var isAwesomeDone;
 118
 119                 mw.loader.testCallback = function () {
 120                         assert.strictEqual( isAwesomeDone, undefined, 'Implementing module is.awesome: isAwesomeDone should still be undefined' );
 121                         isAwesomeDone = true;
 122                 };
 123
 124                 mw.loader.implement( 'test.promise', [ QUnit.fixurl( mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/callMwLoaderTestCallback.js' ) ] );
 125
 126                 return mw.loader.using( 'test.promise' )
 127                 .done( function () {
 128                         assert.strictEqual( isAwesomeDone, true, 'test.promise module should\'ve caused isAwesomeDone to be true' );
 129                         delete mw.loader.testCallback;
 130
 131                 } )
 132                 .fail( function () {
 133                         assert.ok( false, 'Error callback fired while loader.using "test.promise" module' );
 134                 } );
 135         } );
 136
 137         QUnit.test( '.implement( styles={ "css": [text, ..] } )', 2, function ( assert ) {
 138                 var $element = $( '<div class="mw-test-implement-a"></div>' ).appendTo( '#qunit-fixture' );
 139
 140                 assert.notEqual(
 141                         $element.css( 'float' ),
 142                         'right',
 143                         'style is clear'
 144                 );
 145
 146                 mw.loader.implement(
 147                         'test.implement.a',
 148                         function () {
 149                                 assert.equal(
 150                                         $element.css( 'float' ),
 151                                         'right',
 152                                         'style is applied'
 153                                 );
 154                         },
 155                         {
 156                                 all: '.mw-test-implement-a { float: right; }'
 157                         }
 158                 );
 159
 160                 return mw.loader.using( 'test.implement.a' );
 161         } );
 162
 163         QUnit.test( '.implement( styles={ "url": { <media>: [url, ..] } } )', 7, function ( assert ) {
 164                 var $element1 = $( '<div class="mw-test-implement-b1"></div>' ).appendTo( '#qunit-fixture' ),
 165                         $element2 = $( '<div class="mw-test-implement-b2"></div>' ).appendTo( '#qunit-fixture' ),
 166                         $element3 = $( '<div class="mw-test-implement-b3"></div>' ).appendTo( '#qunit-fixture' ),
 167                         done = assert.async();
 168
 169                 assert.notEqual(
 170                         $element1.css( 'text-align' ),
 171                         'center',
 172                         'style is clear'
 173                 );
 174                 assert.notEqual(
 175                         $element2.css( 'float' ),
 176                         'left',
 177                         'style is clear'
 178                 );
 179                 assert.notEqual(
 180                         $element3.css( 'text-align' ),
 181                         'right',
 182                         'style is clear'
 183                 );
 184
 185                 mw.loader.implement(
 186                         'test.implement.b',
 187                         function () {
 188                                 // Note: done() must only be called when the entire test is
 189                                 // complete. So, make sure that we don't start until *both*
 190                                 // assertStyleAsync calls have completed.
 191                                 var pending = 2;
 192                                 assertStyleAsync( assert, $element2, 'float', 'left', function () {
 193                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 194
 195                                         pending--;
 196                                         if ( pending === 0 ) {
 197                                                 done();
 198                                         }
 199                                 } );
 200                                 assertStyleAsync( assert, $element3, 'float', 'right', function () {
 201                                         assert.notEqual( $element1.css( 'text-align' ), 'center', 'print style is not applied' );
 202
 203                                         pending--;
 204                                         if ( pending === 0 ) {
 205                                                 done();
 206                                         }
 207                                 } );
 208                         },
 209                         {
 210                                 url: {
 211                                         print: [ urlStyleTest( '.mw-test-implement-b1', 'text-align', 'center' ) ],
 212                                         screen: [
 213                                                 // bug 40834: Make sure it actually works with more than 1 stylesheet reference
 214                                                 urlStyleTest( '.mw-test-implement-b2', 'float', 'left' ),
 215                                                 urlStyleTest( '.mw-test-implement-b3', 'float', 'right' )
 216                                         ]
 217                                 }
 218                         }
 219                 );
 220
 221                 mw.loader.load( 'test.implement.b' );
 222         } );
 223
 224         // Backwards compatibility
 225         QUnit.test( '.implement( styles={ <media>: text } ) (back-compat)', 2, function ( assert ) {
 226                 var $element = $( '<div class="mw-test-implement-c"></div>' ).appendTo( '#qunit-fixture' );
 227
 228                 assert.notEqual(
 229                         $element.css( 'float' ),
 230                         'right',
 231                         'style is clear'
 232                 );
 233
 234                 mw.loader.implement(
 235                         'test.implement.c',
 236                         function () {
 237                                 assert.equal(
 238                                         $element.css( 'float' ),
 239                                         'right',
 240                                         'style is applied'
 241                                 );
 242                         },
 243                         {
 244                                 all: '.mw-test-implement-c { float: right; }'
 245                         }
 246                 );
 247
 248                 return mw.loader.using( 'test.implement.c' );
 249         } );
 250
 251         // Backwards compatibility
 252         QUnit.test( '.implement( styles={ <media>: [url, ..] } ) (back-compat)', 4, function ( assert ) {
 253                 var $element = $( '<div class="mw-test-implement-d"></div>' ).appendTo( '#qunit-fixture' ),
 254                         $element2 = $( '<div class="mw-test-implement-d2"></div>' ).appendTo( '#qunit-fixture' ),
 255                         done = assert.async();
 256
 257                 assert.notEqual(
 258                         $element.css( 'float' ),
 259                         'right',
 260                         'style is clear'
 261                 );
 262                 assert.notEqual(
 263                         $element2.css( 'text-align' ),
 264                         'center',
 265                         'style is clear'
 266                 );
 267
 268                 mw.loader.implement(
 269                         'test.implement.d',
 270                         function () {
 271                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 272                                         assert.notEqual( $element2.css( 'text-align' ), 'center', 'print style is not applied (bug 40500)' );
 273                                         done();
 274                                 } );
 275                         },
 276                         {
 277                                 all: [ urlStyleTest( '.mw-test-implement-d', 'float', 'right' ) ],
 278                                 print: [ urlStyleTest( '.mw-test-implement-d2', 'text-align', 'center' ) ]
 279                         }
 280                 );
 281
 282                 mw.loader.load( 'test.implement.d' );
 283         } );
 284
 285         // @import (bug 31676)
 286         QUnit.test( '.implement( styles has @import )', 7, function ( assert ) {
 287                 var isJsExecuted, $element,
 288                         done = assert.async();
 289
 290                 mw.loader.implement(
 291                         'test.implement.import',
 292                         function () {
 293                                 assert.strictEqual( isJsExecuted, undefined, 'script not executed multiple times' );
 294                                 isJsExecuted = true;
 295
 296                                 assert.equal( mw.loader.getState( 'test.implement.import' ), 'executing', 'module state during implement() script execution' );
 297
 298                                 $element = $( '<div class="mw-test-implement-import">Foo bar</div>' ).appendTo( '#qunit-fixture' );
 299
 300                                 assert.equal( mw.msg( 'test-foobar' ), 'Hello Foobar, $1!', 'messages load before script execution' );
 301
 302                                 assertStyleAsync( assert, $element, 'float', 'right', function () {
 303                                         assert.equal( $element.css( 'text-align' ), 'center',
 304                                                 'CSS styles after the @import rule are working'
 305                                         );
 306
 307                                         done();
 308                                 } );
 309                         },
 310                         {
 311                                 css: [
 312                                         '@import url(\''
 313                                                 + urlStyleTest( '.mw-test-implement-import', 'float', 'right' )
 314                                                 + '\');\n'
 315                                                 + '.mw-test-implement-import { text-align: center; }'
 316                                 ]
 317                         },
 318                         {
 319                                 'test-foobar': 'Hello Foobar, $1!'
 320                         }
 321                 );
 322
 323                 mw.loader.using( 'test.implement.import' ).always( function () {
 324                         assert.strictEqual( isJsExecuted, true, 'script executed' );
 325                         assert.equal( mw.loader.getState( 'test.implement.import' ), 'ready', 'module state after script execution' );
 326                 } );
 327         } );
 328
 329         QUnit.test( '.implement( dependency with styles )', 4, function ( assert ) {
 330                 var $element = $( '<div class="mw-test-implement-e"></div>' ).appendTo( '#qunit-fixture' ),
 331                         $element2 = $( '<div class="mw-test-implement-e2"></div>' ).appendTo( '#qunit-fixture' );
 332
 333                 assert.notEqual(
 334                         $element.css( 'float' ),
 335                         'right',
 336                         'style is clear'
 337                 );
 338                 assert.notEqual(
 339                         $element2.css( 'float' ),
 340                         'left',
 341                         'style is clear'
 342                 );
 343
 344                 mw.loader.register( [
 345                         [ 'test.implement.e', '0', [ 'test.implement.e2' ] ],
 346                         [ 'test.implement.e2', '0' ]
 347                 ] );
 348
 349                 mw.loader.implement(
 350                         'test.implement.e',
 351                         function () {
 352                                 assert.equal(
 353                                         $element.css( 'float' ),
 354                                         'right',
 355                                         'Depending module\'s style is applied'
 356                                 );
 357                         },
 358                         {
 359                                 all: '.mw-test-implement-e { float: right; }'
 360                         }
 361                 );
 362
 363                 mw.loader.implement(
 364                         'test.implement.e2',
 365                         function () {
 366                                 assert.equal(
 367                                         $element2.css( 'float' ),
 368                                         'left',
 369                                         'Dependency\'s style is applied'
 370                                 );
 371                         },
 372                         {
 373                                 all: '.mw-test-implement-e2 { float: left; }'
 374                         }
 375                 );
 376
 377                 return mw.loader.using( 'test.implement.e' );
 378         } );
 379
 380         QUnit.test( '.implement( only scripts )', 1, function ( assert ) {
 381                 mw.loader.implement( 'test.onlyscripts', function () {} );
 382                 assert.strictEqual( mw.loader.getState( 'test.onlyscripts' ), 'ready' );
 383         } );
 384
 385         QUnit.test( '.implement( only messages )', 2, function ( assert ) {
 386                 assert.assertFalse( mw.messages.exists( 'bug_29107' ), 'Verify that the test message doesn\'t exist yet' );
 387
 388                 // jscs: disable requireCamelCaseOrUpperCaseIdentifiers
 389                 mw.loader.implement( 'test.implement.msgs', [], {}, { bug_29107: 'loaded' } );
 390                 // jscs: enable requireCamelCaseOrUpperCaseIdentifiers
 391
 392                 return mw.loader.using( 'test.implement.msgs', function () {
 393                         assert.ok( mw.messages.exists( 'bug_29107' ), 'Bug 29107: messages-only module should implement ok' );
 394                 }, function () {
 395                         assert.ok( false, 'Error callback fired while implementing "test.implement.msgs" module' );
 396                 } );
 397         } );
 398
 399         QUnit.test( '.implement( empty )', 1, function ( assert ) {
 400                 mw.loader.implement( 'test.empty' );
 401                 assert.strictEqual( mw.loader.getState( 'test.empty' ), 'ready' );
 402         } );
 403
 404         QUnit.test( 'Broken indirect dependency', 4, function ( assert ) {
 405                 // don't emit an error event
 406                 this.sandbox.stub( mw, 'track' );
 407
 408                 mw.loader.register( [
 409                         [ 'test.module1', '0' ],
 410                         [ 'test.module2', '0', [ 'test.module1' ] ],
 411                         [ 'test.module3', '0', [ 'test.module2' ] ]
 412                 ] );
 413                 mw.loader.implement( 'test.module1', function () {
 414                         throw new Error( 'expected' );
 415                 }, {}, {} );
 416                 assert.strictEqual( mw.loader.getState( 'test.module1' ), 'error', 'Expected "error" state for test.module1' );
 417                 assert.strictEqual( mw.loader.getState( 'test.module2' ), 'error', 'Expected "error" state for test.module2' );
 418                 assert.strictEqual( mw.loader.getState( 'test.module3' ), 'error', 'Expected "error" state for test.module3' );
 419
 420                 assert.strictEqual( mw.track.callCount, 1 );
 421         } );
 422
 423         QUnit.test( 'Circular dependency', 1, function ( assert ) {
 424                 mw.loader.register( [
 425                         [ 'test.circle1', '0', [ 'test.circle2' ] ],
 426                         [ 'test.circle2', '0', [ 'test.circle3' ] ],
 427                         [ 'test.circle3', '0', [ 'test.circle1' ] ]
 428                 ] );
 429                 assert.throws( function () {
 430                         mw.loader.using( 'test.circle3' );
 431                 }, /Circular/, 'Detect circular dependency' );
 432         } );
 433
 434         QUnit.test( 'Out-of-order implementation', 9, function ( assert ) {
 435                 mw.loader.register( [
 436                         [ 'test.module4', '0' ],
 437                         [ 'test.module5', '0', [ 'test.module4' ] ],
 438                         [ 'test.module6', '0', [ 'test.module5' ] ]
 439                 ] );
 440                 mw.loader.implement( 'test.module4', function () {} );
 441                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 442                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 443                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'registered', 'Expected "registered" state for test.module6' );
 444                 mw.loader.implement( 'test.module6', function () {} );
 445                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 446                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'registered', 'Expected "registered" state for test.module5' );
 447                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'loaded', 'Expected "loaded" state for test.module6' );
 448                 mw.loader.implement( 'test.module5', function () {} );
 449                 assert.strictEqual( mw.loader.getState( 'test.module4' ), 'ready', 'Expected "ready" state for test.module4' );
 450                 assert.strictEqual( mw.loader.getState( 'test.module5' ), 'ready', 'Expected "ready" state for test.module5' );
 451                 assert.strictEqual( mw.loader.getState( 'test.module6' ), 'ready', 'Expected "ready" state for test.module6' );
 452         } );
 453
 454         QUnit.test( 'Missing dependency', 13, function ( assert ) {
 455                 mw.loader.register( [
 456                         [ 'test.module7', '0' ],
 457                         [ 'test.module8', '0', [ 'test.module7' ] ],
 458                         [ 'test.module9', '0', [ 'test.module8' ] ]
 459                 ] );
 460                 mw.loader.implement( 'test.module8', function () {} );
 461                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'registered', 'Expected "registered" state for test.module7' );
 462                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'loaded', 'Expected "loaded" state for test.module8' );
 463                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'registered', 'Expected "registered" state for test.module9' );
 464                 mw.loader.state( 'test.module7', 'missing' );
 465                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 466                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 467                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 468                 mw.loader.implement( 'test.module9', function () {} );
 469                 assert.strictEqual( mw.loader.getState( 'test.module7' ), 'missing', 'Expected "missing" state for test.module7' );
 470                 assert.strictEqual( mw.loader.getState( 'test.module8' ), 'error', 'Expected "error" state for test.module8' );
 471                 assert.strictEqual( mw.loader.getState( 'test.module9' ), 'error', 'Expected "error" state for test.module9' );
 472                 mw.loader.using(
 473                         [ 'test.module7' ],
 474                         function () {
 475                                 assert.ok( false, 'Success fired despite missing dependency' );
 476                                 assert.ok( true, 'QUnit expected() count dummy' );
 477                         },
 478                         function ( e, dependencies ) {
 479                                 assert.strictEqual( $.isArray( dependencies ), true, 'Expected array of dependencies' );
 480                                 assert.deepEqual( dependencies, [ 'test.module7' ], 'Error callback called with module test.module7' );
 481                         }
 482                 );
 483                 mw.loader.using(
 484                         [ 'test.module9' ],
 485                         function () {
 486                                 assert.ok( false, 'Success fired despite missing dependency' );
 487                                 assert.ok( true, 'QUnit expected() count dummy' );
 488                         },
 489                         function ( e, dependencies ) {
 490                                 assert.strictEqual( $.isArray( dependencies ), true, 'Expected array of dependencies' );
 491                                 dependencies.sort();
 492                                 assert.deepEqual(
 493                                         dependencies,
 494                                         [ 'test.module7', 'test.module8', 'test.module9' ],
 495                                         'Error callback called with all three modules as dependencies'
 496                                 );
 497                         }
 498                 );
 499         } );
 500
 501         QUnit.test( 'Dependency handling', 5, function ( assert ) {
 502                 var done = assert.async();
 503                 mw.loader.register( [
 504                         // [module, version, dependencies, group, source]
 505                         [ 'testMissing', '1', [], null, 'testloader' ],
 506                         [ 'testUsesMissing', '1', [ 'testMissing' ], null, 'testloader' ],
 507                         [ 'testUsesNestedMissing', '1', [ 'testUsesMissing' ], null, 'testloader' ]
 508                 ] );
 509
 510                 function verifyModuleStates() {
 511                         assert.equal( mw.loader.getState( 'testMissing' ), 'missing', 'Module not known to server must have state "missing"' );
 512                         assert.equal( mw.loader.getState( 'testUsesMissing' ), 'error', 'Module with missing dependency must have state "error"' );
 513                         assert.equal( mw.loader.getState( 'testUsesNestedMissing' ), 'error', 'Module with indirect missing dependency must have state "error"' );
 514                 }
 515
 516                 mw.loader.using( [ 'testUsesNestedMissing' ],
 517                         function () {
 518                                 assert.ok( false, 'Error handler should be invoked.' );
 519                                 assert.ok( true ); // Dummy to reach QUnit expect()
 520
 521                                 verifyModuleStates();
 522
 523                                 done();
 524                         },
 525                         function ( e, badmodules ) {
 526                                 assert.ok( true, 'Error handler should be invoked.' );
 527                                 // As soon as server spits out state('testMissing', 'missing');
 528                                 // it will bubble up and trigger the error callback.
 529                                 // Therefor the badmodules array is not testUsesMissing or testUsesNestedMissing.
 530                                 assert.deepEqual( badmodules, [ 'testMissing' ], 'Bad modules as expected.' );
 531
 532                                 verifyModuleStates();
 533
 534                                 done();
 535                         }
 536                 );
 537         } );
 538
 539         QUnit.test( 'Skip-function handling', 5, function ( assert ) {
 540                 mw.loader.register( [
 541                         // [module, version, dependencies, group, source, skip]
 542                         [ 'testSkipped', '1', [], null, 'testloader', 'return true;' ],
 543                         [ 'testNotSkipped', '1', [], null, 'testloader', 'return false;' ],
 544                         [ 'testUsesSkippable', '1', [ 'testSkipped', 'testNotSkipped' ], null, 'testloader' ]
 545                 ] );
 546
 547                 function verifyModuleStates() {
 548                         assert.equal( mw.loader.getState( 'testSkipped' ), 'ready', 'Module is ready when skipped' );
 549                         assert.equal( mw.loader.getState( 'testNotSkipped' ), 'ready', 'Module is ready when not skipped but loaded' );
 550                         assert.equal( mw.loader.getState( 'testUsesSkippable' ), 'ready', 'Module is ready when skippable dependencies are ready' );
 551                 }
 552
 553                 return mw.loader.using( [ 'testUsesSkippable' ],
 554                         function () {
 555                                 assert.ok( true, 'Success handler should be invoked.' );
 556                                 assert.ok( true ); // Dummy to match error handler and reach QUnit expect()
 557
 558                                 verifyModuleStates();
 559                         },
 560                         function ( e, badmodules ) {
 561                                 assert.ok( false, 'Error handler should not be invoked.' );
 562                                 assert.deepEqual( badmodules, [], 'Bad modules as expected.' );
 563
 564                                 verifyModuleStates();
 565                         }
 566                 );
 567         } );
 568
 569         QUnit.asyncTest( '.load( "//protocol-relative" ) - T32825', 2, function ( assert ) {
 570                 // This bug was actually already fixed in 1.18 and later when discovered in 1.17.
 571                 // Test is for regressions!
 572
 573                 // Forge a URL to the test callback script
 574                 var target = QUnit.fixurl(
 575                         mw.config.get( 'wgServer' ) + mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/qunitOkCall.js'
 576                 );
 577
 578                 // Confirm that mw.loader.load() works with protocol-relative URLs
 579                 target = target.replace( /https?:/, '' );
 580
 581                 assert.equal( target.slice( 0, 2 ), '//',
 582                         'URL must be relative to test relative URLs!'
 583                 );
 584
 585                 // Async!
 586                 // The target calls QUnit.start
 587                 mw.loader.load( target );
 588         } );
 589
 590         QUnit.asyncTest( '.load( "/absolute-path" )', 2, function ( assert ) {
 591                 // Forge a URL to the test callback script
 592                 var target = QUnit.fixurl(
 593                         mw.config.get( 'wgScriptPath' ) + '/tests/qunit/data/qunitOkCall.js'
 594                 );
 595
 596                 // Confirm that mw.loader.load() works with absolute-paths (relative to current hostname)
 597                 assert.equal( target.slice( 0, 1 ), '/', 'URL is relative to document root' );
 598
 599                 // Async!
 600                 // The target calls QUnit.start
 601                 mw.loader.load( target );
 602         } );
 603
 604         QUnit.test( 'Empty string module name - T28804', function ( assert ) {
 605                 var done = false;
 606
 607                 assert.strictEqual( mw.loader.getState( '' ), null, 'State (unregistered)' );
 608
 609                 mw.loader.register( '', 'v1' );
 610                 assert.strictEqual( mw.loader.getState( '' ), 'registered', 'State (registered)' );
 611                 assert.strictEqual( mw.loader.getVersion( '' ), 'v1', 'Version' );
 612
 613                 mw.loader.implement( '', function () {
 614                         done = true;
 615                 } );
 616
 617                 return mw.loader.using( '', function () {
 618                         assert.strictEqual( done, true, 'script ran' );
 619                         assert.strictEqual( mw.loader.getState( '' ), 'ready', 'State (ready)' );
 620                 } );
 621         } );
 622
 623         QUnit.test( 'Executing race - T112232', 2, function ( assert ) {
 624                 var done = false;
 625
 626                 // The red herring schedules its CSS buffer first. In T112232, a bug in the
 627                 // state machine would cause the job for testRaceLoadMe to run with an earlier job.
 628                 mw.loader.implement(
 629                         'testRaceRedHerring',
 630                         function () {},
 631                         { css: [ '.mw-testRaceRedHerring {}' ] }
 632                 );
 633                 mw.loader.implement(
 634                         'testRaceLoadMe',
 635                         function () {
 636                                 done = true;
 637                         },
 638                         { css: [ '.mw-testRaceLoadMe { float: left; }' ] }
 639                 );
 640
 641                 mw.loader.load( [ 'testRaceRedHerring', 'testRaceLoadMe' ] );
 642                 return mw.loader.using( 'testRaceLoadMe', function () {
 643                         assert.strictEqual( done, true, 'script ran' );
 644                         assert.strictEqual( mw.loader.getState( 'testRaceLoadMe' ), 'ready', 'state' );
 645                 } );
 646         } );
 647
 648         QUnit.test( 'Stale response caching - T117587', function ( assert ) {
 649                 var count = 0;
 650                 mw.loader.store.enabled = true;
 651                 mw.loader.register( 'test.stale', 'v2' );
 652                 assert.strictEqual( mw.loader.store.get( 'test.stale' ), false, 'Not in store' );
 653
 654                 mw.loader.implement( 'test.stale@v1', function () {
 655                         count++;
 656                 } );
 657
 658                 return mw.loader.using( 'test.stale' )
 659                         .then( function () {
 660                                 assert.strictEqual( count, 1 );
 661                                 // After implementing, registry contains version as implemented by the response.
 662                                 assert.strictEqual( mw.loader.getVersion( 'test.stale' ), 'v1', 'Override version' );
 663                                 assert.strictEqual( mw.loader.getState( 'test.stale' ), 'ready' );
 664                                 assert.ok( mw.loader.store.get( 'test.stale' ), 'In store' );
 665                         } )
 666                         .then( function () {
 667                                 // Reset run time, but keep mw.loader.store
 668                                 mw.loader.moduleRegistry[ 'test.stale' ].script = undefined;
 669                                 mw.loader.moduleRegistry[ 'test.stale' ].state = 'registered';
 670                                 mw.loader.moduleRegistry[ 'test.stale' ].version = 'v2';
 671
 672                                 // Module was stored correctly as v1
 673                                 // On future navigations, it will be ignored until evicted
 674                                 assert.strictEqual( mw.loader.store.get( 'test.stale' ), false, 'Not in store' );
 675                         } );
 676         } );
 677
 678         QUnit.test( 'Stale response caching - backcompat', function ( assert ) {
 679                 var count = 0;
 680                 mw.loader.store.enabled = true;
 681                 mw.loader.register( 'test.stalebc', 'v2' );
 682                 assert.strictEqual( mw.loader.store.get( 'test.stalebc' ), false, 'Not in store' );
 683
 684                 mw.loader.implement( 'test.stalebc', function () {
 685                         count++;
 686                 } );
 687
 688                 return mw.loader.using( 'test.stalebc' )
 689                         .then( function () {
 690                                 assert.strictEqual( count, 1 );
 691                                 assert.strictEqual( mw.loader.getState( 'test.stalebc' ), 'ready' );
 692                                 assert.ok( mw.loader.store.get( 'test.stalebc' ), 'In store' );
 693                         } )
 694                         .then( function () {
 695                                 // Reset run time, but keep mw.loader.store
 696                                 mw.loader.moduleRegistry[ 'test.stalebc' ].script = undefined;
 697                                 mw.loader.moduleRegistry[ 'test.stalebc' ].state = 'registered';
 698                                 mw.loader.moduleRegistry[ 'test.stalebc' ].version = 'v2';
 699
 700                                 // Legacy behaviour is storing under the expected version,
 701                                 // which woudl lead to whitewashing and stale values (T117587).
 702                                 assert.ok( mw.loader.store.get( 'test.stalebc' ), 'In store' );
 703                         } );
 704         } );
 705
 706         QUnit.test( 'require()', 6, function ( assert ) {
 707                 mw.loader.register( [
 708                         [ 'test.require1', '0' ],
 709                         [ 'test.require2', '0' ],
 710                         [ 'test.require3', '0' ],
 711                         [ 'test.require4', '0', [ 'test.require3' ] ]
 712                 ] );
 713                 mw.loader.implement( 'test.require1', function () {} );
 714                 mw.loader.implement( 'test.require2', function ( $, jQuery, require, module ) {
 715                         module.exports = 1;
 716                 } );
 717                 mw.loader.implement( 'test.require3', function ( $, jQuery, require, module ) {
 718                         module.exports = function () {
 719                                 return 'hello world';
 720                         };
 721                 } );
 722                 mw.loader.implement( 'test.require4', function ( $, jQuery, require, module ) {
 723                         var other = require( 'test.require3' );
 724                         module.exports = {
 725                                 pizza: function () {
 726                                         return other();
 727                                 }
 728                         };
 729                 } );
 730                 return mw.loader.using( [ 'test.require1', 'test.require2', 'test.require3', 'test.require4' ] )
 731                 .then( function ( require ) {
 732                         var module1, module2, module3, module4;
 733
 734                         module1 = require( 'test.require1' );
 735                         module2 = require( 'test.require2' );
 736                         module3 = require( 'test.require3' );
 737                         module4 = require( 'test.require4' );
 738
 739                         assert.strictEqual( typeof module1, 'object', 'export of module with no export' );
 740                         assert.strictEqual( module2, 1, 'export a number' );
 741                         assert.strictEqual( module3(), 'hello world', 'export a function' );
 742                         assert.strictEqual( typeof module4.pizza, 'function', 'export an object' );
 743                         assert.strictEqual( module4.pizza(), 'hello world', 'module can require other modules' );
 744
 745                         assert.throws( function () {
 746                                 require( '_badmodule' );
 747                         }, /is not loaded/, 'Requesting non-existent modules throws error.' );
 748                 } );
 749         } );
 750
 751         QUnit.test( 'require() in debug mode', function ( assert ) {
 752                 var path = mw.config.get( 'wgScriptPath' );
 753                 mw.loader.register( [
 754                         [ 'test.require.define', '0' ],
 755                         [ 'test.require.callback', '0', [ 'test.require.define' ] ]
 756                 ] );
 757                 mw.loader.implement( 'test.require.callback', [ QUnit.fixurl( path + '/tests/qunit/data/requireCallMwLoaderTestCallback.js' ) ] );
 758                 mw.loader.implement( 'test.require.define', [ QUnit.fixurl( path + '/tests/qunit/data/defineCallMwLoaderTestCallback.js' ) ] );
 759
 760                 return mw.loader.using( 'test.require.callback' ).then( function ( require ) {
 761                         var cb = require( 'test.require.callback' );
 762                         assert.strictEqual( cb.immediate, 'Defined.', 'module.exports and require work in debug mode' );
 763                         // Must use try-catch because cb.later() will throw if require is undefined,
 764                         // which doesn't work well inside Deferred.then() when using jQuery 1.x with QUnit
 765                         try {
 766                                 assert.strictEqual( cb.later(), 'Defined.', 'require works asynchrously in debug mode' );
 767                         } catch ( e ) {
 768                                 assert.equal( null, String( e ), 'require works asynchrously in debug mode' );
 769                         }
 770                 }, function () {
 771                         assert.ok( false, 'Error callback fired while loader.using "test.require.callback" module' );
 772                 } );
 773         } );
 774
 775 }( mediaWiki, jQuery ) );