tests/parser/parserTest.inc

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