tests/phpunit/includes/content/ContentHandlerTest.php

   1 <?php
   2
   3 use MediaWiki\MediaWikiServices;
   4 use Wikimedia\TestingAccessWrapper;
   5
   6 /**
   7  * @group ContentHandler
   8  * @group Database
   9  */
  10 class ContentHandlerTest extends MediaWikiTestCase {
  11
  12         protected function setUp() {
  13                 parent::setUp();
  14
  15                 $this->setMwGlobals( [
  16                         'wgExtraNamespaces' => [
  17                                 12312 => 'Dummy',
  18                                 12313 => 'Dummy_talk',
  19                         ],
  20                         // The below tests assume that namespaces not mentioned here (Help, User, MediaWiki, ..)
  21                         // default to CONTENT_MODEL_WIKITEXT.
  22                         'wgNamespaceContentModels' => [
  23                                 12312 => 'testing',
  24                         ],
  25                         'wgContentHandlers' => [
  26                                 CONTENT_MODEL_WIKITEXT => WikitextContentHandler::class,
  27                                 CONTENT_MODEL_JAVASCRIPT => JavaScriptContentHandler::class,
  28                                 CONTENT_MODEL_JSON => JsonContentHandler::class,
  29                                 CONTENT_MODEL_CSS => CssContentHandler::class,
  30                                 CONTENT_MODEL_TEXT => TextContentHandler::class,
  31                                 'testing' => DummyContentHandlerForTesting::class,
  32                                 'testing-callbacks' => function ( $modelId ) {
  33                                         return new DummyContentHandlerForTesting( $modelId );
  34                                 }
  35                         ],
  36                 ] );
  37
  38                 // Reset LinkCache
  39                 MediaWikiServices::getInstance()->resetServiceForTesting( 'LinkCache' );
  40         }
  41
  42         protected function tearDown() {
  43                 // Reset LinkCache
  44                 MediaWikiServices::getInstance()->resetServiceForTesting( 'LinkCache' );
  45
  46                 parent::tearDown();
  47         }
  48
  49         public function addDBDataOnce() {
  50                 $this->insertPage( 'Not_Main_Page', 'This is not a main page' );
  51                 $this->insertPage( 'Smithee', 'A smithee is one who smiths. See also [[Alan Smithee]]' );
  52         }
  53
  54         public static function dataGetDefaultModelFor() {
  55                 return [
  56                         [ 'Help:Foo', CONTENT_MODEL_WIKITEXT ],
  57                         [ 'Help:Foo.js', CONTENT_MODEL_WIKITEXT ],
  58                         [ 'Help:Foo.css', CONTENT_MODEL_WIKITEXT ],
  59                         [ 'Help:Foo.json', CONTENT_MODEL_WIKITEXT ],
  60                         [ 'Help:Foo/bar.js', CONTENT_MODEL_WIKITEXT ],
  61                         [ 'User:Foo', CONTENT_MODEL_WIKITEXT ],
  62                         [ 'User:Foo.js', CONTENT_MODEL_WIKITEXT ],
  63                         [ 'User:Foo.css', CONTENT_MODEL_WIKITEXT ],
  64                         [ 'User:Foo.json', CONTENT_MODEL_WIKITEXT ],
  65                         [ 'User:Foo/bar.js', CONTENT_MODEL_JAVASCRIPT ],
  66                         [ 'User:Foo/bar.css', CONTENT_MODEL_CSS ],
  67                         [ 'User:Foo/bar.json', CONTENT_MODEL_JSON ],
  68                         [ 'User:Foo/bar.json.nope', CONTENT_MODEL_WIKITEXT ],
  69                         [ 'User talk:Foo/bar.css', CONTENT_MODEL_WIKITEXT ],
  70                         [ 'User:Foo/bar.js.xxx', CONTENT_MODEL_WIKITEXT ],
  71                         [ 'User:Foo/bar.xxx', CONTENT_MODEL_WIKITEXT ],
  72                         [ 'MediaWiki:Foo.js', CONTENT_MODEL_JAVASCRIPT ],
  73                         [ 'MediaWiki:Foo.JS', CONTENT_MODEL_WIKITEXT ],
  74                         [ 'MediaWiki:Foo.css', CONTENT_MODEL_CSS ],
  75                         [ 'MediaWiki:Foo.css.xxx', CONTENT_MODEL_WIKITEXT ],
  76                         [ 'MediaWiki:Foo.CSS', CONTENT_MODEL_WIKITEXT ],
  77                         [ 'MediaWiki:Foo.json', CONTENT_MODEL_JSON ],
  78                         [ 'MediaWiki:Foo.JSON', CONTENT_MODEL_WIKITEXT ],
  79                 ];
  80         }
  81
  82         /**
  83          * @dataProvider dataGetDefaultModelFor
  84          * @covers ContentHandler::getDefaultModelFor
  85          */
  86         public function testGetDefaultModelFor( $title, $expectedModelId ) {
  87                 $title = Title::newFromText( $title );
  88                 $this->assertEquals( $expectedModelId, ContentHandler::getDefaultModelFor( $title ) );
  89         }
  90
  91         /**
  92          * @dataProvider dataGetDefaultModelFor
  93          * @covers ContentHandler::getForTitle
  94          */
  95         public function testGetForTitle( $title, $expectedContentModel ) {
  96                 $title = Title::newFromText( $title );
  97                 MediaWikiServices::getInstance()->getLinkCache()->addBadLinkObj( $title );
  98                 $handler = ContentHandler::getForTitle( $title );
  99                 $this->assertEquals( $expectedContentModel, $handler->getModelID() );
 100         }
 101
 102         public static function dataGetLocalizedName() {
 103                 return [
 104                         [ null, null ],
 105                         [ "xyzzy", null ],
 106
 107                         // XXX: depends on content language
 108                         [ CONTENT_MODEL_JAVASCRIPT, '/javascript/i' ],
 109                 ];
 110         }
 111
 112         /**
 113          * @dataProvider dataGetLocalizedName
 114          * @covers ContentHandler::getLocalizedName
 115          */
 116         public function testGetLocalizedName( $id, $expected ) {
 117                 $name = ContentHandler::getLocalizedName( $id );
 118
 119                 if ( $expected ) {
 120                         $this->assertNotNull( $name, "no name found for content model $id" );
 121                         $this->assertTrue( preg_match( $expected, $name ) > 0,
 122                                 "content model name for #$id did not match pattern $expected"
 123                         );
 124                 } else {
 125                         $this->assertEquals( $id, $name, "localization of unknown model $id should have "
 126                                 . "fallen back to use the model id directly."
 127                         );
 128                 }
 129         }
 130
 131         public static function dataGetPageLanguage() {
 132                 global $wgLanguageCode;
 133
 134                 return [
 135                         [ "Main", $wgLanguageCode ],
 136                         [ "Dummy:Foo", $wgLanguageCode ],
 137                         [ "MediaWiki:common.js", 'en' ],
 138                         [ "User:Foo/common.js", 'en' ],
 139                         [ "MediaWiki:common.css", 'en' ],
 140                         [ "User:Foo/common.css", 'en' ],
 141                         [ "User:Foo", $wgLanguageCode ],
 142
 143                         [ CONTENT_MODEL_JAVASCRIPT, 'javascript' ],
 144                 ];
 145         }
 146
 147         /**
 148          * @dataProvider dataGetPageLanguage
 149          * @covers ContentHandler::getPageLanguage
 150          */
 151         public function testGetPageLanguage( $title, $expected ) {
 152                 if ( is_string( $title ) ) {
 153                         $title = Title::newFromText( $title );
 154                         MediaWikiServices::getInstance()->getLinkCache()->addBadLinkObj( $title );
 155                 }
 156
 157                 $expected = wfGetLangObj( $expected );
 158
 159                 $handler = ContentHandler::getForTitle( $title );
 160                 $lang = $handler->getPageLanguage( $title );
 161
 162                 $this->assertInstanceOf( Language::class, $lang );
 163                 $this->assertEquals( $expected->getCode(), $lang->getCode() );
 164         }
 165
 166         public static function dataGetContentText_Null() {
 167                 return [
 168                         [ 'fail' ],
 169                         [ 'serialize' ],
 170                         [ 'ignore' ],
 171                 ];
 172         }
 173
 174         /**
 175          * @dataProvider dataGetContentText_Null
 176          * @covers ContentHandler::getContentText
 177          */
 178         public function testGetContentText_Null( $contentHandlerTextFallback ) {
 179                 $this->setMwGlobals( 'wgContentHandlerTextFallback', $contentHandlerTextFallback );
 180
 181                 $content = null;
 182
 183                 $text = ContentHandler::getContentText( $content );
 184                 $this->assertSame( '', $text );
 185         }
 186
 187         public static function dataGetContentText_TextContent() {
 188                 return [
 189                         [ 'fail' ],
 190                         [ 'serialize' ],
 191                         [ 'ignore' ],
 192                 ];
 193         }
 194
 195         /**
 196          * @dataProvider dataGetContentText_TextContent
 197          * @covers ContentHandler::getContentText
 198          */
 199         public function testGetContentText_TextContent( $contentHandlerTextFallback ) {
 200                 $this->setMwGlobals( 'wgContentHandlerTextFallback', $contentHandlerTextFallback );
 201
 202                 $content = new WikitextContent( "hello world" );
 203
 204                 $text = ContentHandler::getContentText( $content );
 205                 $this->assertEquals( $content->getText(), $text );
 206         }
 207
 208         /**
 209          * ContentHandler::getContentText should have thrown an exception for non-text Content object
 210          * @expectedException MWException
 211          * @covers ContentHandler::getContentText
 212          */
 213         public function testGetContentText_NonTextContent_fail() {
 214                 $this->setMwGlobals( 'wgContentHandlerTextFallback', 'fail' );
 215
 216                 $content = new DummyContentForTesting( "hello world" );
 217
 218                 ContentHandler::getContentText( $content );
 219         }
 220
 221         /**
 222          * @covers ContentHandler::getContentText
 223          */
 224         public function testGetContentText_NonTextContent_serialize() {
 225                 $this->setMwGlobals( 'wgContentHandlerTextFallback', 'serialize' );
 226
 227                 $content = new DummyContentForTesting( "hello world" );
 228
 229                 $text = ContentHandler::getContentText( $content );
 230                 $this->assertEquals( $content->serialize(), $text );
 231         }
 232
 233         /**
 234          * @covers ContentHandler::getContentText
 235          */
 236         public function testGetContentText_NonTextContent_ignore() {
 237                 $this->setMwGlobals( 'wgContentHandlerTextFallback', 'ignore' );
 238
 239                 $content = new DummyContentForTesting( "hello world" );
 240
 241                 $text = ContentHandler::getContentText( $content );
 242                 $this->assertNull( $text );
 243         }
 244
 245         public static function dataMakeContent() {
 246                 return [
 247                         [ 'hallo', 'Help:Test', null, null, CONTENT_MODEL_WIKITEXT, false ],
 248                         [ 'hallo', 'MediaWiki:Test.js', null, null, CONTENT_MODEL_JAVASCRIPT, false ],
 249                         [ serialize( 'hallo' ), 'Dummy:Test', null, null, "testing", false ],
 250
 251                         [
 252                                 'hallo',
 253                                 'Help:Test',
 254                                 null,
 255                                 CONTENT_FORMAT_WIKITEXT,
 256                                 CONTENT_MODEL_WIKITEXT,
 257                                 false
 258                         ],
 259                         [
 260                                 'hallo',
 261                                 'MediaWiki:Test.js',
 262                                 null,
 263                                 CONTENT_FORMAT_JAVASCRIPT,
 264                                 CONTENT_MODEL_JAVASCRIPT,
 265                                 false
 266                         ],
 267                         [ serialize( 'hallo' ), 'Dummy:Test', null, "testing", "testing", false ],
 268
 269                         [ 'hallo', 'Help:Test', CONTENT_MODEL_CSS, null, CONTENT_MODEL_CSS, false ],
 270                         [
 271                                 'hallo',
 272                                 'MediaWiki:Test.js',
 273                                 CONTENT_MODEL_CSS,
 274                                 null,
 275                                 CONTENT_MODEL_CSS,
 276                                 false
 277                         ],
 278                         [
 279                                 serialize( 'hallo' ),
 280                                 'Dummy:Test',
 281                                 CONTENT_MODEL_CSS,
 282                                 null,
 283                                 CONTENT_MODEL_CSS,
 284                                 false
 285                         ],
 286
 287                         [ 'hallo', 'Help:Test', CONTENT_MODEL_WIKITEXT, "testing", null, true ],
 288                         [ 'hallo', 'MediaWiki:Test.js', CONTENT_MODEL_CSS, "testing", null, true ],
 289                         [ 'hallo', 'Dummy:Test', CONTENT_MODEL_JAVASCRIPT, "testing", null, true ],
 290                 ];
 291         }
 292
 293         /**
 294          * @dataProvider dataMakeContent
 295          * @covers ContentHandler::makeContent
 296          */
 297         public function testMakeContent( $data, $title, $modelId, $format,
 298                 $expectedModelId, $shouldFail
 299         ) {
 300                 $title = Title::newFromText( $title );
 301                 MediaWikiServices::getInstance()->getLinkCache()->addBadLinkObj( $title );
 302                 try {
 303                         $content = ContentHandler::makeContent( $data, $title, $modelId, $format );
 304
 305                         if ( $shouldFail ) {
 306                                 $this->fail( "ContentHandler::makeContent should have failed!" );
 307                         }
 308
 309                         $this->assertEquals( $expectedModelId, $content->getModel(), 'bad model id' );
 310                         $this->assertEquals( $data, $content->serialize(), 'bad serialized data' );
 311                 } catch ( MWException $ex ) {
 312                         if ( !$shouldFail ) {
 313                                 $this->fail( "ContentHandler::makeContent failed unexpectedly: " . $ex->getMessage() );
 314                         } else {
 315                                 // dummy, so we don't get the "test did not perform any assertions" message.
 316                                 $this->assertTrue( true );
 317                         }
 318                 }
 319         }
 320
 321         /**
 322          * @covers ContentHandler::getAutosummary
 323          *
 324          * Test if we become a "Created blank page" summary from getAutoSummary if no Content added to
 325          * page.
 326          */
 327         public function testGetAutosummary() {
 328                 $this->setContentLang( 'en' );
 329
 330                 $content = new DummyContentHandlerForTesting( CONTENT_MODEL_WIKITEXT );
 331                 $title = Title::newFromText( 'Help:Test' );
 332                 // Create a new content object with no content
 333                 $newContent = ContentHandler::makeContent( '', $title, CONTENT_MODEL_WIKITEXT, null );
 334                 // first check, if we become a blank page created summary with the right bitmask
 335                 $autoSummary = $content->getAutosummary( null, $newContent, 97 );
 336                 $this->assertEquals( $autoSummary,
 337                         wfMessage( 'autosumm-newblank' )->inContentLanguage()->text() );
 338                 // now check, what we become with another bitmask
 339                 $autoSummary = $content->getAutosummary( null, $newContent, 92 );
 340                 $this->assertEquals( $autoSummary, '' );
 341         }
 342
 343         /**
 344          * Test software tag that is added when content model of the page changes
 345          * @covers ContentHandler::getChangeTag
 346          */
 347         public function testGetChangeTag() {
 348                 $this->setMwGlobals( 'wgSoftwareTags', [ 'mw-contentmodelchange' => true ] );
 349                 $wikitextContentHandler = new DummyContentHandlerForTesting( CONTENT_MODEL_WIKITEXT );
 350                 // Create old content object with javascript content model
 351                 $oldContent = ContentHandler::makeContent( '', null, CONTENT_MODEL_JAVASCRIPT, null );
 352                 // Create new content object with wikitext content model
 353                 $newContent = ContentHandler::makeContent( '', null, CONTENT_MODEL_WIKITEXT, null );
 354                 // Get the tag for this edit
 355                 $tag = $wikitextContentHandler->getChangeTag( $oldContent, $newContent, EDIT_UPDATE );
 356                 $this->assertSame( $tag, 'mw-contentmodelchange' );
 357         }
 358
 359         /**
 360          * @covers ContentHandler::supportsCategories
 361          */
 362         public function testSupportsCategories() {
 363                 $handler = new DummyContentHandlerForTesting( CONTENT_MODEL_WIKITEXT );
 364                 $this->assertTrue( $handler->supportsCategories(), 'content model supports categories' );
 365         }
 366
 367         /**
 368          * @covers ContentHandler::supportsDirectEditing
 369          */
 370         public function testSupportsDirectEditing() {
 371                 $handler = new DummyContentHandlerForTesting( CONTENT_MODEL_JSON );
 372                 $this->assertFalse( $handler->supportsDirectEditing(), 'direct editing is not supported' );
 373         }
 374
 375         public static function dummyHookHandler( $foo, &$text, $bar ) {
 376                 if ( $text === null || $text === false ) {
 377                         return false;
 378                 }
 379
 380                 $text = strtoupper( $text );
 381
 382                 return true;
 383         }
 384
 385         public function provideGetModelForID() {
 386                 return [
 387                         [ CONTENT_MODEL_WIKITEXT, WikitextContentHandler::class ],
 388                         [ CONTENT_MODEL_JAVASCRIPT, JavaScriptContentHandler::class ],
 389                         [ CONTENT_MODEL_JSON, JsonContentHandler::class ],
 390                         [ CONTENT_MODEL_CSS, CssContentHandler::class ],
 391                         [ CONTENT_MODEL_TEXT, TextContentHandler::class ],
 392                         [ 'testing', DummyContentHandlerForTesting::class ],
 393                         [ 'testing-callbacks', DummyContentHandlerForTesting::class ],
 394                 ];
 395         }
 396
 397         /**
 398          * @covers ContentHandler::getForModelID
 399          * @dataProvider provideGetModelForID
 400          */
 401         public function testGetModelForID( $modelId, $handlerClass ) {
 402                 $handler = ContentHandler::getForModelID( $modelId );
 403
 404                 $this->assertInstanceOf( $handlerClass, $handler );
 405         }
 406
 407         /**
 408          * @covers ContentHandler::getFieldsForSearchIndex
 409          */
 410         public function testGetFieldsForSearchIndex() {
 411                 $searchEngine = $this->newSearchEngine();
 412
 413                 $handler = ContentHandler::getForModelID( CONTENT_MODEL_WIKITEXT );
 414
 415                 $fields = $handler->getFieldsForSearchIndex( $searchEngine );
 416
 417                 $this->assertArrayHasKey( 'category', $fields );
 418                 $this->assertArrayHasKey( 'external_link', $fields );
 419                 $this->assertArrayHasKey( 'outgoing_link', $fields );
 420                 $this->assertArrayHasKey( 'template', $fields );
 421                 $this->assertArrayHasKey( 'content_model', $fields );
 422         }
 423
 424         private function newSearchEngine() {
 425                 $searchEngine = $this->getMockBuilder( SearchEngine::class )
 426                         ->getMock();
 427
 428                 $searchEngine->expects( $this->any() )
 429                         ->method( 'makeSearchFieldMapping' )
 430                         ->will( $this->returnCallback( function ( $name, $type ) {
 431                                         return new DummySearchIndexFieldDefinition( $name, $type );
 432                         } ) );
 433
 434                 return $searchEngine;
 435         }
 436
 437         /**
 438          * @covers ContentHandler::getDataForSearchIndex
 439          */
 440         public function testDataIndexFields() {
 441                 $mockEngine = $this->createMock( SearchEngine::class );
 442                 $title = Title::newFromText( 'Not_Main_Page', NS_MAIN );
 443                 $page = new WikiPage( $title );
 444
 445                 $this->setTemporaryHook( 'SearchDataForIndex',
 446                         function (
 447                                 &$fields,
 448                                 ContentHandler $handler,
 449                                 WikiPage $page,
 450                                 ParserOutput $output,
 451                                 SearchEngine $engine
 452                         ) {
 453                                 $fields['testDataField'] = 'test content';
 454                         } );
 455
 456                 $output = $page->getContent()->getParserOutput( $title );
 457                 $data = $page->getContentHandler()->getDataForSearchIndex( $page, $output, $mockEngine );
 458                 $this->assertArrayHasKey( 'text', $data );
 459                 $this->assertArrayHasKey( 'text_bytes', $data );
 460                 $this->assertArrayHasKey( 'language', $data );
 461                 $this->assertArrayHasKey( 'testDataField', $data );
 462                 $this->assertEquals( 'test content', $data['testDataField'] );
 463                 $this->assertEquals( 'wikitext', $data['content_model'] );
 464         }
 465
 466         /**
 467          * @covers ContentHandler::getParserOutputForIndexing
 468          */
 469         public function testParserOutputForIndexing() {
 470                 $title = Title::newFromText( 'Smithee', NS_MAIN );
 471                 $page = new WikiPage( $title );
 472
 473                 $out = $page->getContentHandler()->getParserOutputForIndexing( $page );
 474                 $this->assertInstanceOf( ParserOutput::class, $out );
 475                 $this->assertContains( 'one who smiths', $out->getRawText() );
 476         }
 477
 478         /**
 479          * @covers ContentHandler::getContentModels
 480          */
 481         public function testGetContentModelsHook() {
 482                 $this->setTemporaryHook( 'GetContentModels', function ( &$models ) {
 483                         $models[] = 'Ferrari';
 484                 } );
 485                 $this->assertContains( 'Ferrari', ContentHandler::getContentModels() );
 486         }
 487
 488         /**
 489          * @covers ContentHandler::getSlotDiffRenderer
 490          */
 491         public function testGetSlotDiffRenderer_default() {
 492                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 493                         'GetSlotDiffRenderer' => [],
 494                 ] );
 495
 496                 // test default renderer
 497                 $contentHandler = new WikitextContentHandler( CONTENT_MODEL_WIKITEXT );
 498                 $slotDiffRenderer = $contentHandler->getSlotDiffRenderer( RequestContext::getMain() );
 499                 $this->assertInstanceOf( TextSlotDiffRenderer::class, $slotDiffRenderer );
 500         }
 501
 502         /**
 503          * @covers ContentHandler::getSlotDiffRenderer
 504          */
 505         public function testGetSlotDiffRenderer_bc() {
 506                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 507                         'GetSlotDiffRenderer' => [],
 508                 ] );
 509
 510                 // test B/C renderer
 511                 $customDifferenceEngine = $this->getMockBuilder( DifferenceEngine::class )
 512                         ->disableOriginalConstructor()
 513                         ->getMock();
 514                 // hack to track object identity across cloning
 515                 $customDifferenceEngine->objectId = 12345;
 516                 $customContentHandler = $this->getMockBuilder( ContentHandler::class )
 517                         ->setConstructorArgs( [ 'foo', [] ] )
 518                         ->setMethods( [ 'createDifferenceEngine' ] )
 519                         ->getMockForAbstractClass();
 520                 $customContentHandler->expects( $this->any() )
 521                         ->method( 'createDifferenceEngine' )
 522                         ->willReturn( $customDifferenceEngine );
 523                 /** @var ContentHandler $customContentHandler */
 524                 $slotDiffRenderer = $customContentHandler->getSlotDiffRenderer( RequestContext::getMain() );
 525                 $this->assertInstanceOf( DifferenceEngineSlotDiffRenderer::class, $slotDiffRenderer );
 526                 $this->assertSame(
 527                         $customDifferenceEngine->objectId,
 528                         TestingAccessWrapper::newFromObject( $slotDiffRenderer )->differenceEngine->objectId
 529                 );
 530         }
 531
 532         /**
 533          * @covers ContentHandler::getSlotDiffRenderer
 534          */
 535         public function testGetSlotDiffRenderer_nobc() {
 536                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 537                         'GetSlotDiffRenderer' => [],
 538                 ] );
 539
 540                 // test that B/C renderer does not get used when getSlotDiffRendererInternal is overridden
 541                 $customDifferenceEngine = $this->getMockBuilder( DifferenceEngine::class )
 542                         ->disableOriginalConstructor()
 543                         ->getMock();
 544                 $customSlotDiffRenderer = $this->getMockBuilder( SlotDiffRenderer::class )
 545                         ->disableOriginalConstructor()
 546                         ->getMockForAbstractClass();
 547                 $customContentHandler2 = $this->getMockBuilder( ContentHandler::class )
 548                         ->setConstructorArgs( [ 'bar', [] ] )
 549                         ->setMethods( [ 'createDifferenceEngine', 'getSlotDiffRendererInternal' ] )
 550                         ->getMockForAbstractClass();
 551                 $customContentHandler2->expects( $this->any() )
 552                         ->method( 'createDifferenceEngine' )
 553                         ->willReturn( $customDifferenceEngine );
 554                 $customContentHandler2->expects( $this->any() )
 555                         ->method( 'getSlotDiffRendererInternal' )
 556                         ->willReturn( $customSlotDiffRenderer );
 557                 /** @var ContentHandler $customContentHandler2 */
 558                 $slotDiffRenderer = $customContentHandler2->getSlotDiffRenderer( RequestContext::getMain() );
 559                 $this->assertSame( $customSlotDiffRenderer, $slotDiffRenderer );
 560         }
 561
 562         /**
 563          * @covers ContentHandler::getSlotDiffRenderer
 564          */
 565         public function testGetSlotDiffRenderer_hook() {
 566                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 567                         'GetSlotDiffRenderer' => [],
 568                 ] );
 569
 570                 // test that the hook handler takes precedence
 571                 $customDifferenceEngine = $this->getMockBuilder( DifferenceEngine::class )
 572                         ->disableOriginalConstructor()
 573                         ->getMock();
 574                 $customContentHandler = $this->getMockBuilder( ContentHandler::class )
 575                         ->setConstructorArgs( [ 'foo', [] ] )
 576                         ->setMethods( [ 'createDifferenceEngine' ] )
 577                         ->getMockForAbstractClass();
 578                 $customContentHandler->expects( $this->any() )
 579                         ->method( 'createDifferenceEngine' )
 580                         ->willReturn( $customDifferenceEngine );
 581                 /** @var ContentHandler $customContentHandler */
 582
 583                 $customSlotDiffRenderer = $this->getMockBuilder( SlotDiffRenderer::class )
 584                         ->disableOriginalConstructor()
 585                         ->getMockForAbstractClass();
 586                 $customContentHandler2 = $this->getMockBuilder( ContentHandler::class )
 587                         ->setConstructorArgs( [ 'bar', [] ] )
 588                         ->setMethods( [ 'createDifferenceEngine', 'getSlotDiffRendererInternal' ] )
 589                         ->getMockForAbstractClass();
 590                 $customContentHandler2->expects( $this->any() )
 591                         ->method( 'createDifferenceEngine' )
 592                         ->willReturn( $customDifferenceEngine );
 593                 $customContentHandler2->expects( $this->any() )
 594                         ->method( 'getSlotDiffRendererInternal' )
 595                         ->willReturn( $customSlotDiffRenderer );
 596                 /** @var ContentHandler $customContentHandler2 */
 597
 598                 $customSlotDiffRenderer2 = $this->getMockBuilder( SlotDiffRenderer::class )
 599                         ->disableOriginalConstructor()
 600                         ->getMockForAbstractClass();
 601                 $this->setTemporaryHook( 'GetSlotDiffRenderer',
 602                         function ( $handler, &$slotDiffRenderer ) use ( $customSlotDiffRenderer2 ) {
 603                                 $slotDiffRenderer = $customSlotDiffRenderer2;
 604                         } );
 605
 606                 $slotDiffRenderer = $customContentHandler->getSlotDiffRenderer( RequestContext::getMain() );
 607                 $this->assertSame( $customSlotDiffRenderer2, $slotDiffRenderer );
 608                 $slotDiffRenderer = $customContentHandler2->getSlotDiffRenderer( RequestContext::getMain() );
 609                 $this->assertSame( $customSlotDiffRenderer2, $slotDiffRenderer );
 610         }
 611
 612 }