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