tests/phpunit/includes/content/ContentHandlerTest.php

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