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->assertEquals( $expected->getCode(), $lang->getCode() );
 162         }
 163
 164         public static function dataGetContentText_Null() {
 165                 return [
 166                         [ 'fail' ],
 167                         [ 'serialize' ],
 168                         [ 'ignore' ],
 169                 ];
 170         }
 171
 172         /**
 173          * @dataProvider dataGetContentText_Null
 174          * @covers ContentHandler::getContentText
 175          */
 176         public function testGetContentText_Null( $contentHandlerTextFallback ) {
 177                 $this->setMwGlobals( 'wgContentHandlerTextFallback', $contentHandlerTextFallback );
 178
 179                 $content = null;
 180
 181                 $text = ContentHandler::getContentText( $content );
 182                 $this->assertEquals( '', $text );
 183         }
 184
 185         public static function dataGetContentText_TextContent() {
 186                 return [
 187                         [ 'fail' ],
 188                         [ 'serialize' ],
 189                         [ 'ignore' ],
 190                 ];
 191         }
 192
 193         /**
 194          * @dataProvider dataGetContentText_TextContent
 195          * @covers ContentHandler::getContentText
 196          */
 197         public function testGetContentText_TextContent( $contentHandlerTextFallback ) {
 198                 $this->setMwGlobals( 'wgContentHandlerTextFallback', $contentHandlerTextFallback );
 199
 200                 $content = new WikitextContent( "hello world" );
 201
 202                 $text = ContentHandler::getContentText( $content );
 203                 $this->assertEquals( $content->getNativeData(), $text );
 204         }
 205
 206         /**
 207          * ContentHandler::getContentText should have thrown an exception for non-text Content object
 208          * @expectedException MWException
 209          * @covers ContentHandler::getContentText
 210          */
 211         public function testGetContentText_NonTextContent_fail() {
 212                 $this->setMwGlobals( 'wgContentHandlerTextFallback', 'fail' );
 213
 214                 $content = new DummyContentForTesting( "hello world" );
 215
 216                 ContentHandler::getContentText( $content );
 217         }
 218
 219         /**
 220          * @covers ContentHandler::getContentText
 221          */
 222         public function testGetContentText_NonTextContent_serialize() {
 223                 $this->setMwGlobals( 'wgContentHandlerTextFallback', 'serialize' );
 224
 225                 $content = new DummyContentForTesting( "hello world" );
 226
 227                 $text = ContentHandler::getContentText( $content );
 228                 $this->assertEquals( $content->serialize(), $text );
 229         }
 230
 231         /**
 232          * @covers ContentHandler::getContentText
 233          */
 234         public function testGetContentText_NonTextContent_ignore() {
 235                 $this->setMwGlobals( 'wgContentHandlerTextFallback', 'ignore' );
 236
 237                 $content = new DummyContentForTesting( "hello world" );
 238
 239                 $text = ContentHandler::getContentText( $content );
 240                 $this->assertNull( $text );
 241         }
 242
 243         public static function dataMakeContent() {
 244                 return [
 245                         [ 'hallo', 'Help:Test', null, null, CONTENT_MODEL_WIKITEXT, 'hallo', false ],
 246                         [ 'hallo', 'MediaWiki:Test.js', null, null, CONTENT_MODEL_JAVASCRIPT, 'hallo', false ],
 247                         [ serialize( 'hallo' ), 'Dummy:Test', null, null, "testing", 'hallo', false ],
 248
 249                         [
 250                                 'hallo',
 251                                 'Help:Test',
 252                                 null,
 253                                 CONTENT_FORMAT_WIKITEXT,
 254                                 CONTENT_MODEL_WIKITEXT,
 255                                 'hallo',
 256                                 false
 257                         ],
 258                         [
 259                                 'hallo',
 260                                 'MediaWiki:Test.js',
 261                                 null,
 262                                 CONTENT_FORMAT_JAVASCRIPT,
 263                                 CONTENT_MODEL_JAVASCRIPT,
 264                                 'hallo',
 265                                 false
 266                         ],
 267                         [ serialize( 'hallo' ), 'Dummy:Test', null, "testing", "testing", 'hallo', false ],
 268
 269                         [ 'hallo', 'Help:Test', CONTENT_MODEL_CSS, null, CONTENT_MODEL_CSS, 'hallo', false ],
 270                         [
 271                                 'hallo',
 272                                 'MediaWiki:Test.js',
 273                                 CONTENT_MODEL_CSS,
 274                                 null,
 275                                 CONTENT_MODEL_CSS,
 276                                 'hallo',
 277                                 false
 278                         ],
 279                         [
 280                                 serialize( 'hallo' ),
 281                                 'Dummy:Test',
 282                                 CONTENT_MODEL_CSS,
 283                                 null,
 284                                 CONTENT_MODEL_CSS,
 285                                 serialize( 'hallo' ),
 286                                 false
 287                         ],
 288
 289                         [ 'hallo', 'Help:Test', CONTENT_MODEL_WIKITEXT, "testing", null, null, true ],
 290                         [ 'hallo', 'MediaWiki:Test.js', CONTENT_MODEL_CSS, "testing", null, null, true ],
 291                         [ 'hallo', 'Dummy:Test', CONTENT_MODEL_JAVASCRIPT, "testing", null, null, true ],
 292                 ];
 293         }
 294
 295         /**
 296          * @dataProvider dataMakeContent
 297          * @covers ContentHandler::makeContent
 298          */
 299         public function testMakeContent( $data, $title, $modelId, $format,
 300                 $expectedModelId, $expectedNativeData, $shouldFail
 301         ) {
 302                 $title = Title::newFromText( $title );
 303                 MediaWikiServices::getInstance()->getLinkCache()->addBadLinkObj( $title );
 304                 try {
 305                         $content = ContentHandler::makeContent( $data, $title, $modelId, $format );
 306
 307                         if ( $shouldFail ) {
 308                                 $this->fail( "ContentHandler::makeContent should have failed!" );
 309                         }
 310
 311                         $this->assertEquals( $expectedModelId, $content->getModel(), 'bad model id' );
 312                         $this->assertEquals( $expectedNativeData, $content->getNativeData(), 'bads native data' );
 313                 } catch ( MWException $ex ) {
 314                         if ( !$shouldFail ) {
 315                                 $this->fail( "ContentHandler::makeContent failed unexpectedly: " . $ex->getMessage() );
 316                         } else {
 317                                 // dummy, so we don't get the "test did not perform any assertions" message.
 318                                 $this->assertTrue( true );
 319                         }
 320                 }
 321         }
 322
 323         /**
 324          * @covers ContentHandler::getAutosummary
 325          *
 326          * Test if we become a "Created blank page" summary from getAutoSummary if no Content added to
 327          * page.
 328          */
 329         public function testGetAutosummary() {
 330                 $this->setContentLang( 'en' );
 331
 332                 $content = new DummyContentHandlerForTesting( CONTENT_MODEL_WIKITEXT );
 333                 $title = Title::newFromText( 'Help:Test' );
 334                 // Create a new content object with no content
 335                 $newContent = ContentHandler::makeContent( '', $title, CONTENT_MODEL_WIKITEXT, null );
 336                 // first check, if we become a blank page created summary with the right bitmask
 337                 $autoSummary = $content->getAutosummary( null, $newContent, 97 );
 338                 $this->assertEquals( $autoSummary,
 339                         wfMessage( 'autosumm-newblank' )->inContentLanguage()->text() );
 340                 // now check, what we become with another bitmask
 341                 $autoSummary = $content->getAutosummary( null, $newContent, 92 );
 342                 $this->assertEquals( $autoSummary, '' );
 343         }
 344
 345         /**
 346          * Test software tag that is added when content model of the page changes
 347          * @covers ContentHandler::getChangeTag
 348          */
 349         public function testGetChangeTag() {
 350                 $this->setMwGlobals( 'wgSoftwareTags', [ 'mw-contentmodelchange' => true ] );
 351                 $wikitextContentHandler = new DummyContentHandlerForTesting( CONTENT_MODEL_WIKITEXT );
 352                 // Create old content object with javascript content model
 353                 $oldContent = ContentHandler::makeContent( '', null, CONTENT_MODEL_JAVASCRIPT, null );
 354                 // Create new content object with wikitext content model
 355                 $newContent = ContentHandler::makeContent( '', null, CONTENT_MODEL_WIKITEXT, null );
 356                 // Get the tag for this edit
 357                 $tag = $wikitextContentHandler->getChangeTag( $oldContent, $newContent, EDIT_UPDATE );
 358                 $this->assertSame( $tag, 'mw-contentmodelchange' );
 359         }
 360
 361         /**
 362          * @covers ContentHandler::supportsCategories
 363          */
 364         public function testSupportsCategories() {
 365                 $handler = new DummyContentHandlerForTesting( CONTENT_MODEL_WIKITEXT );
 366                 $this->assertTrue( $handler->supportsCategories(), 'content model supports categories' );
 367         }
 368
 369         /**
 370          * @covers ContentHandler::supportsDirectEditing
 371          */
 372         public function testSupportsDirectEditing() {
 373                 $handler = new DummyContentHandlerForTesting( CONTENT_MODEL_JSON );
 374                 $this->assertFalse( $handler->supportsDirectEditing(), 'direct editing is not supported' );
 375         }
 376
 377         public static function dummyHookHandler( $foo, &$text, $bar ) {
 378                 if ( $text === null || $text === false ) {
 379                         return false;
 380                 }
 381
 382                 $text = strtoupper( $text );
 383
 384                 return true;
 385         }
 386
 387         public function provideGetModelForID() {
 388                 return [
 389                         [ CONTENT_MODEL_WIKITEXT, WikitextContentHandler::class ],
 390                         [ CONTENT_MODEL_JAVASCRIPT, JavaScriptContentHandler::class ],
 391                         [ CONTENT_MODEL_JSON, JsonContentHandler::class ],
 392                         [ CONTENT_MODEL_CSS, CssContentHandler::class ],
 393                         [ CONTENT_MODEL_TEXT, TextContentHandler::class ],
 394                         [ 'testing', DummyContentHandlerForTesting::class ],
 395                         [ 'testing-callbacks', DummyContentHandlerForTesting::class ],
 396                 ];
 397         }
 398
 399         /**
 400          * @covers ContentHandler::getForModelID
 401          * @dataProvider provideGetModelForID
 402          */
 403         public function testGetModelForID( $modelId, $handlerClass ) {
 404                 $handler = ContentHandler::getForModelID( $modelId );
 405
 406                 $this->assertInstanceOf( $handlerClass, $handler );
 407         }
 408
 409         /**
 410          * @covers ContentHandler::getFieldsForSearchIndex
 411          */
 412         public function testGetFieldsForSearchIndex() {
 413                 $searchEngine = $this->newSearchEngine();
 414
 415                 $handler = ContentHandler::getForModelID( CONTENT_MODEL_WIKITEXT );
 416
 417                 $fields = $handler->getFieldsForSearchIndex( $searchEngine );
 418
 419                 $this->assertArrayHasKey( 'category', $fields );
 420                 $this->assertArrayHasKey( 'external_link', $fields );
 421                 $this->assertArrayHasKey( 'outgoing_link', $fields );
 422                 $this->assertArrayHasKey( 'template', $fields );
 423                 $this->assertArrayHasKey( 'content_model', $fields );
 424         }
 425
 426         private function newSearchEngine() {
 427                 $searchEngine = $this->getMockBuilder( SearchEngine::class )
 428                         ->getMock();
 429
 430                 $searchEngine->expects( $this->any() )
 431                         ->method( 'makeSearchFieldMapping' )
 432                         ->will( $this->returnCallback( function ( $name, $type ) {
 433                                         return new DummySearchIndexFieldDefinition( $name, $type );
 434                         } ) );
 435
 436                 return $searchEngine;
 437         }
 438
 439         /**
 440          * @covers ContentHandler::getDataForSearchIndex
 441          */
 442         public function testDataIndexFields() {
 443                 $mockEngine = $this->createMock( SearchEngine::class );
 444                 $title = Title::newFromText( 'Not_Main_Page', NS_MAIN );
 445                 $page = new WikiPage( $title );
 446
 447                 $this->setTemporaryHook( 'SearchDataForIndex',
 448                         function (
 449                                 &$fields,
 450                                 ContentHandler $handler,
 451                                 WikiPage $page,
 452                                 ParserOutput $output,
 453                                 SearchEngine $engine
 454                         ) {
 455                                 $fields['testDataField'] = 'test content';
 456                         } );
 457
 458                 $output = $page->getContent()->getParserOutput( $title );
 459                 $data = $page->getContentHandler()->getDataForSearchIndex( $page, $output, $mockEngine );
 460                 $this->assertArrayHasKey( 'text', $data );
 461                 $this->assertArrayHasKey( 'text_bytes', $data );
 462                 $this->assertArrayHasKey( 'language', $data );
 463                 $this->assertArrayHasKey( 'testDataField', $data );
 464                 $this->assertEquals( 'test content', $data['testDataField'] );
 465                 $this->assertEquals( 'wikitext', $data['content_model'] );
 466         }
 467
 468         /**
 469          * @covers ContentHandler::getParserOutputForIndexing
 470          */
 471         public function testParserOutputForIndexing() {
 472                 $title = Title::newFromText( 'Smithee', NS_MAIN );
 473                 $page = new WikiPage( $title );
 474
 475                 $out = $page->getContentHandler()->getParserOutputForIndexing( $page );
 476                 $this->assertInstanceOf( ParserOutput::class, $out );
 477                 $this->assertContains( 'one who smiths', $out->getRawText() );
 478         }
 479
 480         /**
 481          * @covers ContentHandler::getContentModels
 482          */
 483         public function testGetContentModelsHook() {
 484                 $this->setTemporaryHook( 'GetContentModels', function ( &$models ) {
 485                         $models[] = 'Ferrari';
 486                 } );
 487                 $this->assertContains( 'Ferrari', ContentHandler::getContentModels() );
 488         }
 489
 490         /**
 491          * @covers ContentHandler::getSlotDiffRenderer
 492          */
 493         public function testGetSlotDiffRenderer_default() {
 494                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 495                         'GetSlotDiffRenderer' => [],
 496                 ] );
 497
 498                 // test default renderer
 499                 $contentHandler = new WikitextContentHandler( CONTENT_MODEL_WIKITEXT );
 500                 $slotDiffRenderer = $contentHandler->getSlotDiffRenderer( RequestContext::getMain() );
 501                 $this->assertInstanceOf( TextSlotDiffRenderer::class, $slotDiffRenderer );
 502         }
 503
 504         /**
 505          * @covers ContentHandler::getSlotDiffRenderer
 506          */
 507         public function testGetSlotDiffRenderer_bc() {
 508                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 509                         'GetSlotDiffRenderer' => [],
 510                 ] );
 511
 512                 // test B/C renderer
 513                 $customDifferenceEngine = $this->getMockBuilder( DifferenceEngine::class )
 514                         ->disableOriginalConstructor()
 515                         ->getMock();
 516                 // hack to track object identity across cloning
 517                 $customDifferenceEngine->objectId = 12345;
 518                 $customContentHandler = $this->getMockBuilder( ContentHandler::class )
 519                         ->setConstructorArgs( [ 'foo', [] ] )
 520                         ->setMethods( [ 'createDifferenceEngine' ] )
 521                         ->getMockForAbstractClass();
 522                 $customContentHandler->expects( $this->any() )
 523                         ->method( 'createDifferenceEngine' )
 524                         ->willReturn( $customDifferenceEngine );
 525                 /** @var $customContentHandler ContentHandler */
 526                 $slotDiffRenderer = $customContentHandler->getSlotDiffRenderer( RequestContext::getMain() );
 527                 $this->assertInstanceOf( DifferenceEngineSlotDiffRenderer::class, $slotDiffRenderer );
 528                 $this->assertSame(
 529                         $customDifferenceEngine->objectId,
 530                         TestingAccessWrapper::newFromObject( $slotDiffRenderer )->differenceEngine->objectId
 531                 );
 532         }
 533
 534         /**
 535          * @covers ContentHandler::getSlotDiffRenderer
 536          */
 537         public function testGetSlotDiffRenderer_nobc() {
 538                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 539                         'GetSlotDiffRenderer' => [],
 540                 ] );
 541
 542                 // test that B/C renderer does not get used when getSlotDiffRendererInternal is overridden
 543                 $customDifferenceEngine = $this->getMockBuilder( DifferenceEngine::class )
 544                         ->disableOriginalConstructor()
 545                         ->getMock();
 546                 $customSlotDiffRenderer = $this->getMockBuilder( SlotDiffRenderer::class )
 547                         ->disableOriginalConstructor()
 548                         ->getMockForAbstractClass();
 549                 $customContentHandler2 = $this->getMockBuilder( ContentHandler::class )
 550                         ->setConstructorArgs( [ 'bar', [] ] )
 551                         ->setMethods( [ 'createDifferenceEngine', 'getSlotDiffRendererInternal' ] )
 552                         ->getMockForAbstractClass();
 553                 $customContentHandler2->expects( $this->any() )
 554                         ->method( 'createDifferenceEngine' )
 555                         ->willReturn( $customDifferenceEngine );
 556                 $customContentHandler2->expects( $this->any() )
 557                         ->method( 'getSlotDiffRendererInternal' )
 558                         ->willReturn( $customSlotDiffRenderer );
 559                 /** @var $customContentHandler2 ContentHandler */
 560                 $slotDiffRenderer = $customContentHandler2->getSlotDiffRenderer( RequestContext::getMain() );
 561                 $this->assertSame( $customSlotDiffRenderer, $slotDiffRenderer );
 562         }
 563
 564         /**
 565          * @covers ContentHandler::getSlotDiffRenderer
 566          */
 567         public function testGetSlotDiffRenderer_hook() {
 568                 $this->mergeMwGlobalArrayValue( 'wgHooks', [
 569                         'GetSlotDiffRenderer' => [],
 570                 ] );
 571
 572                 // test that the hook handler takes precedence
 573                 $customDifferenceEngine = $this->getMockBuilder( DifferenceEngine::class )
 574                         ->disableOriginalConstructor()
 575                         ->getMock();
 576                 $customContentHandler = $this->getMockBuilder( ContentHandler::class )
 577                         ->setConstructorArgs( [ 'foo', [] ] )
 578                         ->setMethods( [ 'createDifferenceEngine' ] )
 579                         ->getMockForAbstractClass();
 580                 $customContentHandler->expects( $this->any() )
 581                         ->method( 'createDifferenceEngine' )
 582                         ->willReturn( $customDifferenceEngine );
 583                 /** @var $customContentHandler ContentHandler */
 584
 585                 $customSlotDiffRenderer = $this->getMockBuilder( SlotDiffRenderer::class )
 586                         ->disableOriginalConstructor()
 587                         ->getMockForAbstractClass();
 588                 $customContentHandler2 = $this->getMockBuilder( ContentHandler::class )
 589                         ->setConstructorArgs( [ 'bar', [] ] )
 590                         ->setMethods( [ 'createDifferenceEngine', 'getSlotDiffRendererInternal' ] )
 591                         ->getMockForAbstractClass();
 592                 $customContentHandler2->expects( $this->any() )
 593                         ->method( 'createDifferenceEngine' )
 594                         ->willReturn( $customDifferenceEngine );
 595                 $customContentHandler2->expects( $this->any() )
 596                         ->method( 'getSlotDiffRendererInternal' )
 597                         ->willReturn( $customSlotDiffRenderer );
 598                 /** @var $customContentHandler2 ContentHandler */
 599
 600                 $customSlotDiffRenderer2 = $this->getMockBuilder( SlotDiffRenderer::class )
 601                         ->disableOriginalConstructor()
 602                         ->getMockForAbstractClass();
 603                 $this->setTemporaryHook( 'GetSlotDiffRenderer',
 604                         function ( $handler, &$slotDiffRenderer ) use ( $customSlotDiffRenderer2 ) {
 605                                 $slotDiffRenderer = $customSlotDiffRenderer2;
 606                         } );
 607
 608                 $slotDiffRenderer = $customContentHandler->getSlotDiffRenderer( RequestContext::getMain() );
 609                 $this->assertSame( $customSlotDiffRenderer2, $slotDiffRenderer );
 610                 $slotDiffRenderer = $customContentHandler2->getSlotDiffRenderer( RequestContext::getMain() );
 611                 $this->assertSame( $customSlotDiffRenderer2, $slotDiffRenderer );
 612         }
 613
 614 }