tests/parser/parserTest.inc

   1 <?php
   2 /**
   3  * Helper code for the MediaWiki parser test suite.
   4  *
   5  * Copyright © 2004, 2010 Brion Vibber <brion@pobox.com>
   6  * http://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @todo Make this more independent of the configuration (and if possible the database)
  24  * @todo document
  25  * @file
  26  * @ingroup Testing
  27  */
  28
  29 /**
  30  * @ingroup Testing
  31  */
  32 class ParserTest {
  33         /**
  34          * boolean $color whereas output should be colorized
  35          */
  36         private $color;
  37
  38         /**
  39          * boolean $showOutput Show test output
  40          */
  41         private $showOutput;
  42
  43         /**
  44          * boolean $useTemporaryTables Use temporary tables for the temporary database
  45          */
  46         private $useTemporaryTables = true;
  47
  48         /**
  49          * boolean $databaseSetupDone True if the database has been set up
  50          */
  51         private $databaseSetupDone = false;
  52
  53         /**
  54          * Our connection to the database
  55          * @var DatabaseBase
  56          */
  57         private $db;
  58
  59         /**
  60          * Database clone helper
  61          * @var CloneDatabase
  62          */
  63         private $dbClone;
  64
  65         /**
  66          * string $oldTablePrefix Original table prefix
  67          */
  68         private $oldTablePrefix;
  69
  70         private $maxFuzzTestLength = 300;
  71         private $fuzzSeed = 0;
  72         private $memoryLimit = 50;
  73         private $uploadDir = null;
  74
  75         public $regex = "";
  76         private $savedGlobals = array();
  77
  78         /**
  79          * Sets terminal colorization and diff/quick modes depending on OS and
  80          * command-line options (--color and --quick).
  81          */
  82         public function __construct( $options = array() ) {
  83                 # Only colorize output if stdout is a terminal.
  84                 $this->color = !wfIsWindows() && Maintenance::posix_isatty( 1 );
  85
  86                 if ( isset( $options['color'] ) ) {
  87                         switch ( $options['color'] ) {
  88                                 case 'no':
  89                                         $this->color = false;
  90                                         break;
  91                                 case 'yes':
  92                                 default:
  93                                         $this->color = true;
  94                                         break;
  95                         }
  96                 }
  97
  98                 $this->term = $this->color
  99                         ? new AnsiTermColorer()
 100                         : new DummyTermColorer();
 101
 102                 $this->showDiffs = !isset( $options['quick'] );
 103                 $this->showProgress = !isset( $options['quiet'] );
 104                 $this->showFailure = !(
 105                         isset( $options['quiet'] )
 106                                 && ( isset( $options['record'] )
 107                                 || isset( $options['compare'] ) ) ); // redundant output
 108
 109                 $this->showOutput = isset( $options['show-output'] );
 110
 111                 if ( isset( $options['filter'] ) ) {
 112                         $options['regex'] = $options['filter'];
 113                 }
 114
 115                 if ( isset( $options['regex'] ) ) {
 116                         if ( isset( $options['record'] ) ) {
 117                                 echo "Warning: --record cannot be used with --regex, disabling --record\n";
 118                                 unset( $options['record'] );
 119                         }
 120                         $this->regex = $options['regex'];
 121                 } else {
 122                         # Matches anything
 123                         $this->regex = '';
 124                 }
 125
 126                 $this->setupRecorder( $options );
 127                 $this->keepUploads = isset( $options['keep-uploads'] );
 128
 129                 if ( isset( $options['seed'] ) ) {
 130                         $this->fuzzSeed = intval( $options['seed'] ) - 1;
 131                 }
 132
 133                 $this->runDisabled = isset( $options['run-disabled'] );
 134
 135                 $this->hooks = array();
 136                 $this->functionHooks = array();
 137                 self::setUp();
 138         }
 139
 140         static function setUp() {
 141                 global $wgParser, $wgParserConf, $IP, $messageMemc, $wgMemc,
 142                         $wgUser, $wgLang, $wgOut, $wgRequest, $wgStyleDirectory, $wgEnableParserCache,
 143                         $wgNamespaceAliases, $wgNamespaceProtection, $wgLocalFileRepo,
 144                         $parserMemc, $wgThumbnailScriptPath, $wgScriptPath,
 145                         $wgArticlePath, $wgStyleSheetPath, $wgScript, $wgStylePath, $wgExtensionAssetsPath,
 146                         $wgMainCacheType, $wgMessageCacheType, $wgParserCacheType, $wgLockManagers;
 147
 148                 $wgScript = '/index.php';
 149                 $wgScriptPath = '/';
 150                 $wgArticlePath = '/wiki/$1';
 151                 $wgStyleSheetPath = '/skins';
 152                 $wgStylePath = '/skins';
 153                 $wgExtensionAssetsPath = '/extensions';
 154                 $wgThumbnailScriptPath = false;
 155                 $wgLockManagers = array( array(
 156                         'name' => 'fsLockManager',
 157                         'class' => 'FSLockManager',
 158                         'lockDirectory' => wfTempDir() . '/test-repo/lockdir',
 159                 ), array(
 160                         'name' => 'nullLockManager',
 161                         'class' => 'NullLockManager',
 162                 ) );
 163                 $wgLocalFileRepo = array(
 164                         'class' => 'LocalRepo',
 165                         'name' => 'local',
 166                         'url' => 'http://example.com/images',
 167                         'hashLevels' => 2,
 168                         'transformVia404' => false,
 169                         'backend' => new FSFileBackend( array(
 170                                 'name' => 'local-backend',
 171                                 'lockManager' => 'fsLockManager',
 172                                 'containerPaths' => array(
 173                                         'local-public' => wfTempDir() . '/test-repo/public',
 174                                         'local-thumb' => wfTempDir() . '/test-repo/thumb',
 175                                         'local-temp' => wfTempDir() . '/test-repo/temp',
 176                                         'local-deleted' => wfTempDir() . '/test-repo/deleted',
 177                                 )
 178                         ) )
 179                 );
 180                 $wgNamespaceProtection[NS_MEDIAWIKI] = 'editinterface';
 181                 $wgNamespaceAliases['Image'] = NS_FILE;
 182                 $wgNamespaceAliases['Image_talk'] = NS_FILE_TALK;
 183
 184                 // XXX: tests won't run without this (for CACHE_DB)
 185                 if ( $wgMainCacheType === CACHE_DB ) {
 186                         $wgMainCacheType = CACHE_NONE;
 187                 }
 188                 if ( $wgMessageCacheType === CACHE_DB ) {
 189                         $wgMessageCacheType = CACHE_NONE;
 190                 }
 191                 if ( $wgParserCacheType === CACHE_DB ) {
 192                         $wgParserCacheType = CACHE_NONE;
 193                 }
 194
 195                 $wgEnableParserCache = false;
 196                 DeferredUpdates::clearPendingUpdates();
 197                 $wgMemc = wfGetMainCache(); // checks $wgMainCacheType
 198                 $messageMemc = wfGetMessageCacheStorage();
 199                 $parserMemc = wfGetParserCacheStorage();
 200
 201                 // $wgContLang = new StubContLang;
 202                 $wgUser = new User;
 203                 $context = new RequestContext;
 204                 $wgLang = $context->getLanguage();
 205                 $wgOut = $context->getOutput();
 206                 $wgParser = new StubObject( 'wgParser', $wgParserConf['class'], array( $wgParserConf ) );
 207                 $wgRequest = $context->getRequest();
 208
 209                 if ( $wgStyleDirectory === false ) {
 210                         $wgStyleDirectory = "$IP/skins";
 211                 }
 212
 213         }
 214
 215         public function setupRecorder( $options ) {
 216                 if ( isset( $options['record'] ) ) {
 217                         $this->recorder = new DbTestRecorder( $this );
 218                         $this->recorder->version = isset( $options['setversion'] ) ?
 219                                 $options['setversion'] : SpecialVersion::getVersion();
 220                 } elseif ( isset( $options['compare'] ) ) {
 221                         $this->recorder = new DbTestPreviewer( $this );
 222                 } else {
 223                         $this->recorder = new TestRecorder( $this );
 224                 }
 225         }
 226
 227         /**
 228          * Remove last character if it is a newline
 229          * @group utility
 230          */
 231         static public function chomp( $s ) {
 232                 if ( substr( $s, -1 ) === "\n" ) {
 233                         return substr( $s, 0, -1 );
 234                 } else {
 235                         return $s;
 236                 }
 237         }
 238
 239         /**
 240          * Run a fuzz test series
 241          * Draw input from a set of test files
 242          */
 243         function fuzzTest( $filenames ) {
 244                 $GLOBALS['wgContLang'] = Language::factory( 'en' );
 245                 $dict = $this->getFuzzInput( $filenames );
 246                 $dictSize = strlen( $dict );
 247                 $logMaxLength = log( $this->maxFuzzTestLength );
 248                 $this->setupDatabase();
 249                 ini_set( 'memory_limit', $this->memoryLimit * 1048576 );
 250
 251                 $numTotal = 0;
 252                 $numSuccess = 0;
 253                 $user = new User;
 254                 $opts = ParserOptions::newFromUser( $user );
 255                 $title = Title::makeTitle( NS_MAIN, 'Parser_test' );
 256
 257                 while ( true ) {
 258                         // Generate test input
 259                         mt_srand( ++$this->fuzzSeed );
 260                         $totalLength = mt_rand( 1, $this->maxFuzzTestLength );
 261                         $input = '';
 262
 263                         while ( strlen( $input ) < $totalLength ) {
 264                                 $logHairLength = mt_rand( 0, 1000000 ) / 1000000 * $logMaxLength;
 265                                 $hairLength = min( intval( exp( $logHairLength ) ), $dictSize );
 266                                 $offset = mt_rand( 0, $dictSize - $hairLength );
 267                                 $input .= substr( $dict, $offset, $hairLength );
 268                         }
 269
 270                         $this->setupGlobals();
 271                         $parser = $this->getParser();
 272
 273                         // Run the test
 274                         try {
 275                                 $parser->parse( $input, $title, $opts );
 276                                 $fail = false;
 277                         } catch ( Exception $exception ) {
 278                                 $fail = true;
 279                         }
 280
 281                         if ( $fail ) {
 282                                 echo "Test failed with seed {$this->fuzzSeed}\n";
 283                                 echo "Input:\n";
 284                                 printf( "string(%d) \"%s\"\n\n", strlen( $input ), $input );
 285                                 echo "$exception\n";
 286                         } else {
 287                                 $numSuccess++;
 288                         }
 289
 290                         $numTotal++;
 291                         $this->teardownGlobals();
 292                         $parser->__destruct();
 293
 294                         if ( $numTotal % 100 == 0 ) {
 295                                 $usage = intval( memory_get_usage( true ) / $this->memoryLimit / 1048576 * 100 );
 296                                 echo "{$this->fuzzSeed}: $numSuccess/$numTotal (mem: $usage%)\n";
 297                                 if ( $usage > 90 ) {
 298                                         echo "Out of memory:\n";
 299                                         $memStats = $this->getMemoryBreakdown();
 300
 301                                         foreach ( $memStats as $name => $usage ) {
 302                                                 echo "$name: $usage\n";
 303                                         }
 304                                         $this->abort();
 305                                 }
 306                         }
 307                 }
 308         }
 309
 310         /**
 311          * Get an input dictionary from a set of parser test files
 312          */
 313         function getFuzzInput( $filenames ) {
 314                 $dict = '';
 315
 316                 foreach ( $filenames as $filename ) {
 317                         $contents = file_get_contents( $filename );
 318                         preg_match_all( '/!!\s*input\n(.*?)\n!!\s*result/s', $contents, $matches );
 319
 320                         foreach ( $matches[1] as $match ) {
 321                                 $dict .= $match . "\n";
 322                         }
 323                 }
 324
 325                 return $dict;
 326         }
 327
 328         /**
 329          * Get a memory usage breakdown
 330          */
 331         function getMemoryBreakdown() {
 332                 $memStats = array();
 333
 334                 foreach ( $GLOBALS as $name => $value ) {
 335                         $memStats['$' . $name] = strlen( serialize( $value ) );
 336                 }
 337
 338                 $classes = get_declared_classes();
 339
 340                 foreach ( $classes as $class ) {
 341                         $rc = new ReflectionClass( $class );
 342                         $props = $rc->getStaticProperties();
 343                         $memStats[$class] = strlen( serialize( $props ) );
 344                         $methods = $rc->getMethods();
 345
 346                         foreach ( $methods as $method ) {
 347                                 $memStats[$class] += strlen( serialize( $method->getStaticVariables() ) );
 348                         }
 349                 }
 350
 351                 $functions = get_defined_functions();
 352
 353                 foreach ( $functions['user'] as $function ) {
 354                         $rf = new ReflectionFunction( $function );
 355                         $memStats["$function()"] = strlen( serialize( $rf->getStaticVariables() ) );
 356                 }
 357
 358                 asort( $memStats );
 359
 360                 return $memStats;
 361         }
 362
 363         function abort() {
 364                 $this->abort();
 365         }
 366
 367         /**
 368          * Run a series of tests listed in the given text files.
 369          * Each test consists of a brief description, wikitext input,
 370          * and the expected HTML output.
 371          *
 372          * Prints status updates on stdout and counts up the total
 373          * number and percentage of passed tests.
 374          *
 375          * @param $filenames Array of strings
 376          * @return Boolean: true if passed all tests, false if any tests failed.
 377          */
 378         public function runTestsFromFiles( $filenames ) {
 379                 $ok = false;
 380                 $GLOBALS['wgContLang'] = Language::factory( 'en' );
 381                 $this->recorder->start();
 382                 try {
 383                         $this->setupDatabase();
 384                         $ok = true;
 385
 386                         foreach ( $filenames as $filename ) {
 387                                 $tests = new TestFileIterator( $filename, $this );
 388                                 $ok = $this->runTests( $tests ) && $ok;
 389                         }
 390
 391                         $this->teardownDatabase();
 392                         $this->recorder->report();
 393                 } catch ( DBError $e ) {
 394                         echo $e->getMessage();
 395                 }
 396                 $this->recorder->end();
 397
 398                 return $ok;
 399         }
 400
 401         function runTests( $tests ) {
 402                 $ok = true;
 403
 404                 foreach ( $tests as $t ) {
 405                         $result =
 406                                 $this->runTest( $t['test'], $t['input'], $t['result'], $t['options'], $t['config'] );
 407                         $ok = $ok && $result;
 408                         $this->recorder->record( $t['test'], $result );
 409                 }
 410
 411                 if ( $this->showProgress ) {
 412                         print "\n";
 413                 }
 414
 415                 return $ok;
 416         }
 417
 418         /**
 419          * Get a Parser object
 420          */
 421         function getParser( $preprocessor = null ) {
 422                 global $wgParserConf;
 423
 424                 $class = $wgParserConf['class'];
 425                 $parser = new $class( array( 'preprocessorClass' => $preprocessor ) + $wgParserConf );
 426
 427                 foreach ( $this->hooks as $tag => $callback ) {
 428                         $parser->setHook( $tag, $callback );
 429                 }
 430
 431                 foreach ( $this->functionHooks as $tag => $bits ) {
 432                         list( $callback, $flags ) = $bits;
 433                         $parser->setFunctionHook( $tag, $callback, $flags );
 434                 }
 435
 436                 wfRunHooks( 'ParserTestParser', array( &$parser ) );
 437
 438                 return $parser;
 439         }
 440
 441         /**
 442          * Run a given wikitext input through a freshly-constructed wiki parser,
 443          * and compare the output against the expected results.
 444          * Prints status and explanatory messages to stdout.
 445          *
 446          * @param $desc String: test's description
 447          * @param $input String: wikitext to try rendering
 448          * @param $result String: result to output
 449          * @param $opts Array: test's options
 450          * @param $config String: overrides for global variables, one per line
 451          * @return Boolean
 452          */
 453         public function runTest( $desc, $input, $result, $opts, $config ) {
 454                 if ( $this->showProgress ) {
 455                         $this->showTesting( $desc );
 456                 }
 457
 458                 $opts = $this->parseOptions( $opts );
 459                 $context = $this->setupGlobals( $opts, $config );
 460
 461                 $user = $context->getUser();
 462                 $options = ParserOptions::newFromContext( $context );
 463
 464                 if ( isset( $opts['title'] ) ) {
 465                         $titleText = $opts['title'];
 466                 } else {
 467                         $titleText = 'Parser test';
 468                 }
 469
 470                 $local = isset( $opts['local'] );
 471                 $preprocessor = isset( $opts['preprocessor'] ) ? $opts['preprocessor'] : null;
 472                 $parser = $this->getParser( $preprocessor );
 473                 $title = Title::newFromText( $titleText );
 474
 475                 if ( isset( $opts['pst'] ) ) {
 476                         $out = $parser->preSaveTransform( $input, $title, $user, $options );
 477                 } elseif ( isset( $opts['msg'] ) ) {
 478                         $out = $parser->transformMsg( $input, $options, $title );
 479                 } elseif ( isset( $opts['section'] ) ) {
 480                         $section = $opts['section'];
 481                         $out = $parser->getSection( $input, $section );
 482                 } elseif ( isset( $opts['replace'] ) ) {
 483                         $section = $opts['replace'][0];
 484                         $replace = $opts['replace'][1];
 485                         $out = $parser->replaceSection( $input, $section, $replace );
 486                 } elseif ( isset( $opts['comment'] ) ) {
 487                         $out = Linker::formatComment( $input, $title, $local );
 488                 } elseif ( isset( $opts['preload'] ) ) {
 489                         $out = $parser->getpreloadText( $input, $title, $options );
 490                 } else {
 491                         $output = $parser->parse( $input, $title, $options, true, true, 1337 );
 492                         $out = $output->getText();
 493
 494                         if ( isset( $opts['showtitle'] ) ) {
 495                                 if ( $output->getTitleText() ) {
 496                                         $title = $output->getTitleText();
 497                                 }
 498
 499                                 $out = "$title\n$out";
 500                         }
 501
 502                         if ( isset( $opts['ill'] ) ) {
 503                                 $out = $this->tidy( implode( ' ', $output->getLanguageLinks() ) );
 504                         } elseif ( isset( $opts['cat'] ) ) {
 505                                 $outputPage = $context->getOutput();
 506                                 $outputPage->addCategoryLinks( $output->getCategories() );
 507                                 $cats = $outputPage->getCategoryLinks();
 508
 509                                 if ( isset( $cats['normal'] ) ) {
 510                                         $out = $this->tidy( implode( ' ', $cats['normal'] ) );
 511                                 } else {
 512                                         $out = '';
 513                                 }
 514                         }
 515
 516                         $result = $this->tidy( $result );
 517                 }
 518
 519                 $this->teardownGlobals();
 520                 return $this->showTestResult( $desc, $result, $out );
 521         }
 522
 523         /**
 524          *
 525          */
 526         function showTestResult( $desc, $result, $out ) {
 527                 if ( $result === $out ) {
 528                         $this->showSuccess( $desc );
 529                         return true;
 530                 } else {
 531                         $this->showFailure( $desc, $result, $out );
 532                         return false;
 533                 }
 534         }
 535
 536         /**
 537          * Use a regex to find out the value of an option
 538          * @param $key String: name of option val to retrieve
 539          * @param $opts Options array to look in
 540          * @param $default Mixed: default value returned if not found
 541          */
 542         private static function getOptionValue( $key, $opts, $default ) {
 543                 $key = strtolower( $key );
 544
 545                 if ( isset( $opts[$key] ) ) {
 546                         return $opts[$key];
 547                 } else {
 548                         return $default;
 549                 }
 550         }
 551
 552         private function parseOptions( $instring ) {
 553                 $opts = array();
 554                 // foo
 555                 // foo=bar
 556                 // foo="bar baz"
 557                 // foo=[[bar baz]]
 558                 // foo=bar,"baz quux"
 559                 $regex = '/\b
 560                         ([\w-]+)                                                # Key
 561                         \b
 562                         (?:\s*
 563                                 =                                               # First sub-value
 564                                 \s*
 565                                 (
 566                                         "
 567                                                 [^"]*                   # Quoted val
 568                                         "
 569                                 |
 570                                         \[\[
 571                                                 [^]]*                   # Link target
 572                                         \]\]
 573                                 |
 574                                         [\w-]+                          # Plain word
 575                                 )
 576                                 (?:\s*
 577                                         ,                                       # Sub-vals 1..N
 578                                         \s*
 579                                         (
 580                                                 "[^"]*"                 # Quoted val
 581                                         |
 582                                                 \[\[[^]]*\]\]   # Link target
 583                                         |
 584                                                 [\w-]+                  # Plain word
 585                                         )
 586                                 )*
 587                         )?
 588                         /x';
 589
 590                 if ( preg_match_all( $regex, $instring, $matches, PREG_SET_ORDER ) ) {
 591                         foreach ( $matches as $bits ) {
 592                                 array_shift( $bits );
 593                                 $key = strtolower( array_shift( $bits ) );
 594                                 if ( count( $bits ) == 0 ) {
 595                                         $opts[$key] = true;
 596                                 } elseif ( count( $bits ) == 1 ) {
 597                                         $opts[$key] = $this->cleanupOption( array_shift( $bits ) );
 598                                 } else {
 599                                         // Array!
 600                                         $opts[$key] = array_map( array( $this, 'cleanupOption' ), $bits );
 601                                 }
 602                         }
 603                 }
 604                 return $opts;
 605         }
 606
 607         private function cleanupOption( $opt ) {
 608                 if ( substr( $opt, 0, 1 ) == '"' ) {
 609                         return substr( $opt, 1, -1 );
 610                 }
 611
 612                 if ( substr( $opt, 0, 2 ) == '[[' ) {
 613                         return substr( $opt, 2, -2 );
 614                 }
 615                 return $opt;
 616         }
 617
 618         /**
 619          * Set up the global variables for a consistent environment for each test.
 620          * Ideally this should replace the global configuration entirely.
 621          */
 622         private function setupGlobals( $opts = '', $config = '' ) {
 623                 # Find out values for some special options.
 624                 $lang =
 625                         self::getOptionValue( 'language', $opts, 'en' );
 626                 $variant =
 627                         self::getOptionValue( 'variant', $opts, false );
 628                 $maxtoclevel =
 629                         self::getOptionValue( 'wgMaxTocLevel', $opts, 999 );
 630                 $linkHolderBatchSize =
 631                         self::getOptionValue( 'wgLinkHolderBatchSize', $opts, 1000 );
 632
 633                 $settings = array(
 634                         'wgServer' => 'http://Britney-Spears',
 635                         'wgScript' => '/index.php',
 636                         'wgScriptPath' => '/',
 637                         'wgArticlePath' => '/wiki/$1',
 638                         'wgActionPaths' => array(),
 639                         'wgLockManagers' => array( array(
 640                                 'name' => 'fsLockManager',
 641                                 'class' => 'FSLockManager',
 642                                 'lockDirectory' => $this->uploadDir . '/lockdir',
 643                         ), array(
 644                                 'name' => 'nullLockManager',
 645                                 'class' => 'NullLockManager',
 646                         ) ),
 647                         'wgLocalFileRepo' => array(
 648                                 'class' => 'LocalRepo',
 649                                 'name' => 'local',
 650                                 'url' => 'http://example.com/images',
 651                                 'hashLevels' => 2,
 652                                 'transformVia404' => false,
 653                                 'backend' => new FSFileBackend( array(
 654                                         'name' => 'local-backend',
 655                                         'lockManager' => 'fsLockManager',
 656                                         'containerPaths' => array(
 657                                                 'local-public' => $this->uploadDir,
 658                                                 'local-thumb' => $this->uploadDir . '/thumb',
 659                                                 'local-temp' => $this->uploadDir . '/temp',
 660                                                 'local-deleted' => $this->uploadDir . '/delete',
 661                                         )
 662                                 ) )
 663                         ),
 664                         'wgEnableUploads' => self::getOptionValue( 'wgEnableUploads', $opts, true ),
 665                         'wgStylePath' => '/skins',
 666                         'wgStyleSheetPath' => '/skins',
 667                         'wgSitename' => 'MediaWiki',
 668                         'wgLanguageCode' => $lang,
 669                         'wgDBprefix' => $this->db->getType() != 'oracle' ? 'parsertest_' : 'pt_',
 670                         'wgRawHtml' => isset( $opts['rawhtml'] ),
 671                         'wgLang' => null,
 672                         'wgContLang' => null,
 673                         'wgNamespacesWithSubpages' => array( 0 => isset( $opts['subpage'] ) ),
 674                         'wgMaxTocLevel' => $maxtoclevel,
 675                         'wgCapitalLinks' => true,
 676                         'wgNoFollowLinks' => true,
 677                         'wgNoFollowDomainExceptions' => array(),
 678                         'wgThumbnailScriptPath' => false,
 679                         'wgUseImageResize' => true,
 680                         'wgLocaltimezone' => 'UTC',
 681                         'wgAllowExternalImages' => true,
 682                         'wgUseTidy' => false,
 683                         'wgDefaultLanguageVariant' => $variant,
 684                         'wgVariantArticlePath' => false,
 685                         'wgGroupPermissions' => array( '*' => array(
 686                                 'createaccount' => true,
 687                                 'read' => true,
 688                                 'edit' => true,
 689                                 'createpage' => true,
 690                                 'createtalk' => true,
 691                         ) ),
 692                         'wgNamespaceProtection' => array( NS_MEDIAWIKI => 'editinterface' ),
 693                         'wgDefaultExternalStore' => array(),
 694                         'wgForeignFileRepos' => array(),
 695                         'wgLinkHolderBatchSize' => $linkHolderBatchSize,
 696                         'wgExperimentalHtmlIds' => false,
 697                         'wgExternalLinkTarget' => false,
 698                         'wgAlwaysUseTidy' => false,
 699                         'wgHtml5' => true,
 700                         'wgWellFormedXml' => true,
 701                         'wgAllowMicrodataAttributes' => true,
 702                         'wgAdaptiveMessageCache' => true,
 703                         'wgDisableLangConversion' => false,
 704                         'wgDisableTitleConversion' => false,
 705                 );
 706
 707                 if ( $config ) {
 708                         $configLines = explode( "\n", $config );
 709
 710                         foreach ( $configLines as $line ) {
 711                                 list( $var, $value ) = explode( '=', $line, 2 );
 712
 713                                 $settings[$var] = eval( "return $value;" );
 714                         }
 715                 }
 716
 717                 $this->savedGlobals = array();
 718
 719                 /** @since 1.20 */
 720                 wfRunHooks( 'ParserTestGlobals', array( &$settings ) );
 721
 722                 foreach ( $settings as $var => $val ) {
 723                         if ( array_key_exists( $var, $GLOBALS ) ) {
 724                                 $this->savedGlobals[$var] = $GLOBALS[$var];
 725                         }
 726
 727                         $GLOBALS[$var] = $val;
 728                 }
 729
 730                 $GLOBALS['wgContLang'] = Language::factory( $lang );
 731                 $GLOBALS['wgMemc'] = new EmptyBagOStuff;
 732
 733                 $context = new RequestContext();
 734                 $GLOBALS['wgLang'] = $context->getLanguage();
 735                 $GLOBALS['wgOut'] = $context->getOutput();
 736
 737                 $GLOBALS['wgUser'] = new User();
 738
 739                 global $wgHooks;
 740
 741                 $wgHooks['ParserTestParser'][] = 'ParserTestParserHook::setup';
 742                 $wgHooks['ParserGetVariableValueTs'][] = 'ParserTest::getFakeTimestamp';
 743
 744                 MagicWord::clearCache();
 745
 746                 return $context;
 747         }
 748
 749         /**
 750          * List of temporary tables to create, without prefix.
 751          * Some of these probably aren't necessary.
 752          */
 753         private function listTables() {
 754                 $tables = array( 'user', 'user_properties', 'user_former_groups', 'page', 'page_restrictions',
 755                         'protected_titles', 'revision', 'text', 'pagelinks', 'imagelinks',
 756                         'categorylinks', 'templatelinks', 'externallinks', 'langlinks', 'iwlinks',
 757                         'site_stats', 'hitcounter', 'ipblocks', 'image', 'oldimage',
 758                         'recentchanges', 'watchlist', 'interwiki', 'logging',
 759                         'querycache', 'objectcache', 'job', 'l10n_cache', 'redirect', 'querycachetwo',
 760                         'archive', 'user_groups', 'page_props', 'category', 'msg_resource', 'msg_resource_links'
 761                 );
 762
 763                 if ( in_array( $this->db->getType(), array( 'mysql', 'sqlite', 'oracle' ) ) ) {
 764                         array_push( $tables, 'searchindex' );
 765                 }
 766
 767                 // Allow extensions to add to the list of tables to duplicate;
 768                 // may be necessary if they hook into page save or other code
 769                 // which will require them while running tests.
 770                 wfRunHooks( 'ParserTestTables', array( &$tables ) );
 771
 772                 return $tables;
 773         }
 774
 775         /**
 776          * Set up a temporary set of wiki tables to work with for the tests.
 777          * Currently this will only be done once per run, and any changes to
 778          * the db will be visible to later tests in the run.
 779          */
 780         public function setupDatabase() {
 781                 global $wgDBprefix;
 782
 783                 if ( $this->databaseSetupDone ) {
 784                         return;
 785                 }
 786
 787                 $this->db = wfGetDB( DB_MASTER );
 788                 $dbType = $this->db->getType();
 789
 790                 if ( $wgDBprefix === 'parsertest_' || ( $dbType == 'oracle' && $wgDBprefix === 'pt_' ) ) {
 791                         throw new MWException( 'setupDatabase should be called before setupGlobals' );
 792                 }
 793
 794                 $this->databaseSetupDone = true;
 795                 $this->oldTablePrefix = $wgDBprefix;
 796
 797                 # SqlBagOStuff broke when using temporary tables on r40209 (bug 15892).
 798                 # It seems to have been fixed since (r55079?), but regressed at some point before r85701.
 799                 # This works around it for now...
 800                 ObjectCache::$instances[CACHE_DB] = new HashBagOStuff;
 801
 802                 # CREATE TEMPORARY TABLE breaks if there is more than one server
 803                 if ( wfGetLB()->getServerCount() != 1 ) {
 804                         $this->useTemporaryTables = false;
 805                 }
 806
 807                 $temporary = $this->useTemporaryTables || $dbType == 'postgres';
 808                 $prefix = $dbType != 'oracle' ? 'parsertest_' : 'pt_';
 809
 810                 $this->dbClone = new CloneDatabase( $this->db, $this->listTables(), $prefix );
 811                 $this->dbClone->useTemporaryTables( $temporary );
 812                 $this->dbClone->cloneTableStructure();
 813
 814                 if ( $dbType == 'oracle' ) {
 815                         $this->db->query( 'BEGIN FILL_WIKI_INFO; END;' );
 816                         # Insert 0 user to prevent FK violations
 817
 818                         # Anonymous user
 819                         $this->db->insert( 'user', array(
 820                                 'user_id' => 0,
 821                                 'user_name' => 'Anonymous' ) );
 822                 }
 823
 824                 # Hack: insert a few Wikipedia in-project interwiki prefixes,
 825                 # for testing inter-language links
 826                 $this->db->insert( 'interwiki', array(
 827                         array( 'iw_prefix' => 'wikipedia',
 828                                 'iw_url' => 'http://en.wikipedia.org/wiki/$1',
 829                                 'iw_api' => '',
 830                                 'iw_wikiid' => '',
 831                                 'iw_local' => 0 ),
 832                         array( 'iw_prefix' => 'meatball',
 833                                 'iw_url' => 'http://www.usemod.com/cgi-bin/mb.pl?$1',
 834                                 'iw_api' => '',
 835                                 'iw_wikiid' => '',
 836                                 'iw_local' => 0 ),
 837                         array( 'iw_prefix' => 'zh',
 838                                 'iw_url' => 'http://zh.wikipedia.org/wiki/$1',
 839                                 'iw_api' => '',
 840                                 'iw_wikiid' => '',
 841                                 'iw_local' => 1 ),
 842                         array( 'iw_prefix' => 'es',
 843                                 'iw_url' => 'http://es.wikipedia.org/wiki/$1',
 844                                 'iw_api' => '',
 845                                 'iw_wikiid' => '',
 846                                 'iw_local' => 1 ),
 847                         array( 'iw_prefix' => 'fr',
 848                                 'iw_url' => 'http://fr.wikipedia.org/wiki/$1',
 849                                 'iw_api' => '',
 850                                 'iw_wikiid' => '',
 851                                 'iw_local' => 1 ),
 852                         array( 'iw_prefix' => 'ru',
 853                                 'iw_url' => 'http://ru.wikipedia.org/wiki/$1',
 854                                 'iw_api' => '',
 855                                 'iw_wikiid' => '',
 856                                 'iw_local' => 1 ),
 857                 ) );
 858
 859                 # Update certain things in site_stats
 860                 $this->db->insert( 'site_stats', array( 'ss_row_id' => 1, 'ss_images' => 2, 'ss_good_articles' => 1 ) );
 861
 862                 # Reinitialise the LocalisationCache to match the database state
 863                 Language::getLocalisationCache()->unloadAll();
 864
 865                 # Clear the message cache
 866                 MessageCache::singleton()->clear();
 867
 868                 $this->uploadDir = $this->setupUploadDir();
 869                 $user = User::createNew( 'WikiSysop' );
 870                 $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Foobar.jpg' ) );
 871                 $image->recordUpload2( '', 'Upload of some lame file', 'Some lame file', array(
 872                         'size' => 12345,
 873                         'width' => 1941,
 874                         'height' => 220,
 875                         'bits' => 24,
 876                         'media_type' => MEDIATYPE_BITMAP,
 877                         'mime' => 'image/jpeg',
 878                         'metadata' => serialize( array() ),
 879                         'sha1' => wfBaseConvert( '', 16, 36, 31 ),
 880                         'fileExists' => true
 881                 ), $this->db->timestamp( '20010115123500' ), $user );
 882
 883                 # This image will be blacklisted in [[MediaWiki:Bad image list]]
 884                 $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Bad.jpg' ) );
 885                 $image->recordUpload2( '', 'zomgnotcensored', 'Borderline image', array(
 886                         'size' => 12345,
 887                         'width' => 320,
 888                         'height' => 240,
 889                         'bits' => 24,
 890                         'media_type' => MEDIATYPE_BITMAP,
 891                         'mime' => 'image/jpeg',
 892                         'metadata' => serialize( array() ),
 893                         'sha1' => wfBaseConvert( '', 16, 36, 31 ),
 894                         'fileExists' => true
 895                 ), $this->db->timestamp( '20010115123500' ), $user );
 896         }
 897
 898         public function teardownDatabase() {
 899                 if ( !$this->databaseSetupDone ) {
 900                         $this->teardownGlobals();
 901                         return;
 902                 }
 903                 $this->teardownUploadDir( $this->uploadDir );
 904
 905                 $this->dbClone->destroy();
 906                 $this->databaseSetupDone = false;
 907
 908                 if ( $this->useTemporaryTables ) {
 909                         if ( $this->db->getType() == 'sqlite' ) {
 910                                 # Under SQLite the searchindex table is virtual and need
 911                                 # to be explicitly destroyed. See bug 29912
 912                                 # See also MediaWikiTestCase::destroyDB()
 913                                 wfDebug( __METHOD__ . " explicitly destroying sqlite virtual table parsertest_searchindex\n" );
 914                                 $this->db->query( "DROP TABLE `parsertest_searchindex`" );
 915                         }
 916                         # Don't need to do anything
 917                         $this->teardownGlobals();
 918                         return;
 919                 }
 920
 921                 $tables = $this->listTables();
 922
 923                 foreach ( $tables as $table ) {
 924                         $sql = $this->db->getType() == 'oracle' ? "DROP TABLE pt_$table DROP CONSTRAINTS" : "DROP TABLE `parsertest_$table`";
 925                         $this->db->query( $sql );
 926                 }
 927
 928                 if ( $this->db->getType() == 'oracle' ) {
 929                         $this->db->query( 'BEGIN FILL_WIKI_INFO; END;' );
 930                 }
 931
 932                 $this->teardownGlobals();
 933         }
 934
 935         /**
 936          * Create a dummy uploads directory which will contain a couple
 937          * of files in order to pass existence tests.
 938          *
 939          * @return String: the directory
 940          */
 941         private function setupUploadDir() {
 942                 global $IP;
 943
 944                 if ( $this->keepUploads ) {
 945                         $dir = wfTempDir() . '/mwParser-images';
 946
 947                         if ( is_dir( $dir ) ) {
 948                                 return $dir;
 949                         }
 950                 } else {
 951                         $dir = wfTempDir() . "/mwParser-" . mt_rand() . "-images";
 952                 }
 953
 954                 // wfDebug( "Creating upload directory $dir\n" );
 955                 if ( file_exists( $dir ) ) {
 956                         wfDebug( "Already exists!\n" );
 957                         return $dir;
 958                 }
 959
 960                 wfMkdirParents( $dir . '/3/3a', null, __METHOD__ );
 961                 copy( "$IP/skins/monobook/headbg.jpg", "$dir/3/3a/Foobar.jpg" );
 962                 wfMkdirParents( $dir . '/0/09', null, __METHOD__ );
 963                 copy( "$IP/skins/monobook/headbg.jpg", "$dir/0/09/Bad.jpg" );
 964
 965                 return $dir;
 966         }
 967
 968         /**
 969          * Restore default values and perform any necessary clean-up
 970          * after each test runs.
 971          */
 972         private function teardownGlobals() {
 973                 RepoGroup::destroySingleton();
 974                 FileBackendGroup::destroySingleton();
 975                 LockManagerGroup::destroySingletons();
 976                 LinkCache::singleton()->clear();
 977
 978                 foreach ( $this->savedGlobals as $var => $val ) {
 979                         $GLOBALS[$var] = $val;
 980                 }
 981         }
 982
 983         /**
 984          * Remove the dummy uploads directory
 985          */
 986         private function teardownUploadDir( $dir ) {
 987                 if ( $this->keepUploads ) {
 988                         return;
 989                 }
 990
 991                 // delete the files first, then the dirs.
 992                 self::deleteFiles(
 993                         array(
 994                                 "$dir/3/3a/Foobar.jpg",
 995                                 "$dir/thumb/3/3a/Foobar.jpg/180px-Foobar.jpg",
 996                                 "$dir/thumb/3/3a/Foobar.jpg/200px-Foobar.jpg",
 997                                 "$dir/thumb/3/3a/Foobar.jpg/640px-Foobar.jpg",
 998                                 "$dir/thumb/3/3a/Foobar.jpg/120px-Foobar.jpg",
 999                                 "$dir/thumb/3/3a/Foobar.jpg/1280px-Foobar.jpg",
1000                                 "$dir/thumb/3/3a/Foobar.jpg/20px-Foobar.jpg",
1001                                 "$dir/thumb/3/3a/Foobar.jpg/270px-Foobar.jpg",
1002                                 "$dir/thumb/3/3a/Foobar.jpg/300px-Foobar.jpg",
1003                                 "$dir/thumb/3/3a/Foobar.jpg/30px-Foobar.jpg",
1004                                 "$dir/thumb/3/3a/Foobar.jpg/360px-Foobar.jpg",
1005                                 "$dir/thumb/3/3a/Foobar.jpg/400px-Foobar.jpg",
1006                                 "$dir/thumb/3/3a/Foobar.jpg/40px-Foobar.jpg",
1007                                 "$dir/thumb/3/3a/Foobar.jpg/70px-Foobar.jpg",
1008                                 "$dir/thumb/3/3a/Foobar.jpg/960px-Foobar.jpg",
1009
1010                                 "$dir/0/09/Bad.jpg",
1011
1012                                 "$dir/math/f/a/5/fa50b8b616463173474302ca3e63586b.png",
1013                         )
1014                 );
1015
1016                 self::deleteDirs(
1017                         array(
1018                                 "$dir/3/3a",
1019                                 "$dir/3",
1020                                 "$dir/thumb/6/65",
1021                                 "$dir/thumb/6",
1022                                 "$dir/thumb/3/3a/Foobar.jpg",
1023                                 "$dir/thumb/3/3a",
1024                                 "$dir/thumb/3",
1025
1026                                 "$dir/0/09/",
1027                                 "$dir/0/",
1028                                 "$dir/thumb",
1029                                 "$dir/math/f/a/5",
1030                                 "$dir/math/f/a",
1031                                 "$dir/math/f",
1032                                 "$dir/math",
1033                                 "$dir",
1034                         )
1035                 );
1036         }
1037
1038         /**
1039          * Delete the specified files, if they exist.
1040          * @param $files Array: full paths to files to delete.
1041          */
1042         private static function deleteFiles( $files ) {
1043                 foreach ( $files as $file ) {
1044                         if ( file_exists( $file ) ) {
1045                                 unlink( $file );
1046                         }
1047                 }
1048         }
1049
1050         /**
1051          * Delete the specified directories, if they exist. Must be empty.
1052          * @param $dirs Array: full paths to directories to delete.
1053          */
1054         private static function deleteDirs( $dirs ) {
1055                 foreach ( $dirs as $dir ) {
1056                         if ( is_dir( $dir ) ) {
1057                                 rmdir( $dir );
1058                         }
1059                 }
1060         }
1061
1062         /**
1063          * "Running test $desc..."
1064          */
1065         protected function showTesting( $desc ) {
1066                 print "Running test $desc... ";
1067         }
1068
1069         /**
1070          * Print a happy success message.
1071          *
1072          * @param $desc String: the test name
1073          * @return Boolean
1074          */
1075         protected function showSuccess( $desc ) {
1076                 if ( $this->showProgress ) {
1077                         print $this->term->color( '1;32' ) . 'PASSED' . $this->term->reset() . "\n";
1078                 }
1079
1080                 return true;
1081         }
1082
1083         /**
1084          * Print a failure message and provide some explanatory output
1085          * about what went wrong if so configured.
1086          *
1087          * @param $desc String: the test name
1088          * @param $result String: expected HTML output
1089          * @param $html String: actual HTML output
1090          * @return Boolean
1091          */
1092         protected function showFailure( $desc, $result, $html ) {
1093                 if ( $this->showFailure ) {
1094                         if ( !$this->showProgress ) {
1095                                 # In quiet mode we didn't show the 'Testing' message before the
1096                                 # test, in case it succeeded. Show it now:
1097                                 $this->showTesting( $desc );
1098                         }
1099
1100                         print $this->term->color( '31' ) . 'FAILED!' . $this->term->reset() . "\n";
1101
1102                         if ( $this->showOutput ) {
1103                                 print "--- Expected ---\n$result\n--- Actual ---\n$html\n";
1104                         }
1105
1106                         if ( $this->showDiffs ) {
1107                                 print $this->quickDiff( $result, $html );
1108                                 if ( !$this->wellFormed( $html ) ) {
1109                                         print "XML error: $this->mXmlError\n";
1110                                 }
1111                         }
1112                 }
1113
1114                 return false;
1115         }
1116
1117         /**
1118          * Run given strings through a diff and return the (colorized) output.
1119          * Requires writable /tmp directory and a 'diff' command in the PATH.
1120          *
1121          * @param $input String
1122          * @param $output String
1123          * @param $inFileTail String: tailing for the input file name
1124          * @param $outFileTail String: tailing for the output file name
1125          * @return String
1126          */
1127         protected function quickDiff( $input, $output, $inFileTail = 'expected', $outFileTail = 'actual' ) {
1128                 # Windows, or at least the fc utility, is retarded
1129                 $slash = wfIsWindows() ? '\\' : '/';
1130                 $prefix = wfTempDir() . "{$slash}mwParser-" . mt_rand();
1131
1132                 $infile = "$prefix-$inFileTail";
1133                 $this->dumpToFile( $input, $infile );
1134
1135                 $outfile = "$prefix-$outFileTail";
1136                 $this->dumpToFile( $output, $outfile );
1137
1138                 $shellInfile = wfEscapeShellArg( $infile );
1139                 $shellOutfile = wfEscapeShellArg( $outfile );
1140
1141                 global $wgDiff3;
1142                 // we assume that people with diff3 also have usual diff
1143                 $diff = ( wfIsWindows() && !$wgDiff3 )
1144                         ? `fc $shellInfile $shellOutfile`
1145                         : `diff -au $shellInfile $shellOutfile`;
1146                 unlink( $infile );
1147                 unlink( $outfile );
1148
1149                 return $this->colorDiff( $diff );
1150         }
1151
1152         /**
1153          * Write the given string to a file, adding a final newline.
1154          *
1155          * @param $data String
1156          * @param $filename String
1157          */
1158         private function dumpToFile( $data, $filename ) {
1159                 $file = fopen( $filename, "wt" );
1160                 fwrite( $file, $data . "\n" );
1161                 fclose( $file );
1162         }
1163
1164         /**
1165          * Colorize unified diff output if set for ANSI color output.
1166          * Subtractions are colored blue, additions red.
1167          *
1168          * @param $text String
1169          * @return String
1170          */
1171         protected function colorDiff( $text ) {
1172                 return preg_replace(
1173                         array( '/^(-.*)$/m', '/^(\+.*)$/m' ),
1174                         array( $this->term->color( 34 ) . '$1' . $this->term->reset(),
1175                                 $this->term->color( 31 ) . '$1' . $this->term->reset() ),
1176                         $text );
1177         }
1178
1179         /**
1180          * Show "Reading tests from ..."
1181          *
1182          * @param $path String
1183          */
1184         public function showRunFile( $path ) {
1185                 print $this->term->color( 1 ) .
1186                         "Reading tests from \"$path\"..." .
1187                         $this->term->reset() .
1188                         "\n";
1189         }
1190
1191         /**
1192          * Insert a temporary test article
1193          * @param $name String: the title, including any prefix
1194          * @param $text String: the article text
1195          * @param $line Integer: the input line number, for reporting errors
1196          * @param $ignoreDuplicate Boolean: whether to silently ignore duplicate pages
1197          */
1198         static public function addArticle( $name, $text, $line = 'unknown', $ignoreDuplicate = '' ) {
1199                 global $wgCapitalLinks;
1200
1201                 $oldCapitalLinks = $wgCapitalLinks;
1202                 $wgCapitalLinks = true; // We only need this from SetupGlobals() See r70917#c8637
1203
1204                 $text = self::chomp( $text );
1205                 $name = self::chomp( $name );
1206
1207                 $title = Title::newFromText( $name );
1208
1209                 if ( is_null( $title ) ) {
1210                         throw new MWException( "invalid title '$name' at line $line\n" );
1211                 }
1212
1213                 $page = WikiPage::factory( $title );
1214                 $page->loadPageData( 'fromdbmaster' );
1215
1216                 if ( $page->exists() ) {
1217                         if ( $ignoreDuplicate == 'ignoreduplicate' ) {
1218                                 return;
1219                         } else {
1220                                 throw new MWException( "duplicate article '$name' at line $line\n" );
1221                         }
1222                 }
1223
1224                 $page->doEditContent( ContentHandler::makeContent( $text, $title ), '', EDIT_NEW );
1225
1226                 $wgCapitalLinks = $oldCapitalLinks;
1227         }
1228
1229         /**
1230          * Steal a callback function from the primary parser, save it for
1231          * application to our scary parser. If the hook is not installed,
1232          * abort processing of this file.
1233          *
1234          * @param $name String
1235          * @return Bool true if tag hook is present
1236          */
1237         public function requireHook( $name ) {
1238                 global $wgParser;
1239
1240                 $wgParser->firstCallInit(); // make sure hooks are loaded.
1241
1242                 if ( isset( $wgParser->mTagHooks[$name] ) ) {
1243                         $this->hooks[$name] = $wgParser->mTagHooks[$name];
1244                 } else {
1245                         echo "   This test suite requires the '$name' hook extension, skipping.\n";
1246                         return false;
1247                 }
1248
1249                 return true;
1250         }
1251
1252         /**
1253          * Steal a callback function from the primary parser, save it for
1254          * application to our scary parser. If the hook is not installed,
1255          * abort processing of this file.
1256          *
1257          * @param $name String
1258          * @return Bool true if function hook is present
1259          */
1260         public function requireFunctionHook( $name ) {
1261                 global $wgParser;
1262
1263                 $wgParser->firstCallInit(); // make sure hooks are loaded.
1264
1265                 if ( isset( $wgParser->mFunctionHooks[$name] ) ) {
1266                         $this->functionHooks[$name] = $wgParser->mFunctionHooks[$name];
1267                 } else {
1268                         echo "   This test suite requires the '$name' function hook extension, skipping.\n";
1269                         return false;
1270                 }
1271
1272                 return true;
1273         }
1274
1275         /**
1276          * Run the "tidy" command on text if the $wgUseTidy
1277          * global is true
1278          *
1279          * @param $text String: the text to tidy
1280          * @return String
1281          */
1282         private function tidy( $text ) {
1283                 global $wgUseTidy;
1284
1285                 if ( $wgUseTidy ) {
1286                         $text = MWTidy::tidy( $text );
1287                 }
1288
1289                 return $text;
1290         }
1291
1292         private function wellFormed( $text ) {
1293                 $html =
1294                         Sanitizer::hackDocType() .
1295                                 '<html>' .
1296                                 $text .
1297                                 '</html>';
1298
1299                 $parser = xml_parser_create( "UTF-8" );
1300
1301                 # case folding violates XML standard, turn it off
1302                 xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
1303
1304                 if ( !xml_parse( $parser, $html, true ) ) {
1305                         $err = xml_error_string( xml_get_error_code( $parser ) );
1306                         $position = xml_get_current_byte_index( $parser );
1307                         $fragment = $this->extractFragment( $html, $position );
1308                         $this->mXmlError = "$err at byte $position:\n$fragment";
1309                         xml_parser_free( $parser );
1310
1311                         return false;
1312                 }
1313
1314                 xml_parser_free( $parser );
1315
1316                 return true;
1317         }
1318
1319         private function extractFragment( $text, $position ) {
1320                 $start = max( 0, $position - 10 );
1321                 $before = $position - $start;
1322                 $fragment = '...' .
1323                         $this->term->color( 34 ) .
1324                         substr( $text, $start, $before ) .
1325                         $this->term->color( 0 ) .
1326                         $this->term->color( 31 ) .
1327                         $this->term->color( 1 ) .
1328                         substr( $text, $position, 1 ) .
1329                         $this->term->color( 0 ) .
1330                         $this->term->color( 34 ) .
1331                         substr( $text, $position + 1, 9 ) .
1332                         $this->term->color( 0 ) .
1333                         '...';
1334                 $display = str_replace( "\n", ' ', $fragment );
1335                 $caret = '   ' .
1336                         str_repeat( ' ', $before ) .
1337                         $this->term->color( 31 ) .
1338                         '^' .
1339                         $this->term->color( 0 );
1340
1341                 return "$display\n$caret";
1342         }
1343
1344         static function getFakeTimestamp( &$parser, &$ts ) {
1345                 $ts = 123;
1346                 return true;
1347         }
1348 }