maintenance/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 Maintenance
  25  */
  26
  27 /**
  28  * @ingroup Maintenance
  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          * string $oldTablePrefix Original table prefix
  53          */
  54         private $oldTablePrefix;
  55
  56         private $maxFuzzTestLength = 300;
  57         private $fuzzSeed = 0;
  58         private $memoryLimit = 50;
  59         private $uploadDir = null;
  60
  61         public $regex = "";
  62         private $savedGlobals = array();
  63         /**
  64          * Sets terminal colorization and diff/quick modes depending on OS and
  65          * command-line options (--color and --quick).
  66          */
  67         public function ParserTest( $options = array() ) {
  68                 # Only colorize output if stdout is a terminal.
  69                 $this->color = !wfIsWindows() && posix_isatty( 1 );
  70
  71                 if ( isset( $options['color'] ) ) {
  72                         switch( $options['color'] ) {
  73                         case 'no':
  74                                 $this->color = false;
  75                                 break;
  76                         case 'yes':
  77                         default:
  78                                 $this->color = true;
  79                                 break;
  80                         }
  81                 }
  82
  83                 $this->term = $this->color
  84                         ? new AnsiTermColorer()
  85                         : new DummyTermColorer();
  86
  87                 $this->showDiffs = !isset( $options['quick'] );
  88                 $this->showProgress = !isset( $options['quiet'] );
  89                 $this->showFailure = !(
  90                         isset( $options['quiet'] )
  91                         && ( isset( $options['record'] )
  92                                 || isset( $options['compare'] ) ) ); // redundant output
  93
  94                 $this->showOutput = isset( $options['show-output'] );
  95
  96
  97                 if ( isset( $options['regex'] ) ) {
  98                         if ( isset( $options['record'] ) ) {
  99                                 echo "Warning: --record cannot be used with --regex, disabling --record\n";
 100                                 unset( $options['record'] );
 101                         }
 102                         $this->regex = $options['regex'];
 103                 } else {
 104                         # Matches anything
 105                         $this->regex = '';
 106                 }
 107
 108                 $this->setupRecorder( $options );
 109                 $this->keepUploads = isset( $options['keep-uploads'] );
 110
 111                 if ( isset( $options['seed'] ) ) {
 112                         $this->fuzzSeed = intval( $options['seed'] ) - 1;
 113                 }
 114
 115                 $this->runDisabled = isset( $options['run-disabled'] );
 116
 117                 $this->hooks = array();
 118                 $this->functionHooks = array();
 119                 self::setUp();
 120         }
 121
 122         static function setUp() {
 123                 global $wgParser, $wgParserConf, $IP, $messageMemc, $wgMemc, $wgDeferredUpdateList,
 124                         $wgUser, $wgLang, $wgOut, $wgRequest, $wgStyleDirectory, $wgEnableParserCache,
 125                         $wgMessageCache, $wgUseDatabaseMessages, $wgMsgCacheExpiry, $parserMemc,
 126                         $wgNamespaceAliases, $wgNamespaceProtection, $wgLocalFileRepo,
 127                         $wgThumbnailScriptPath, $wgScriptPath,
 128                         $wgArticlePath, $wgStyleSheetPath, $wgScript, $wgStylePath;
 129
 130                 $wgScript = '/index.php';
 131                 $wgScriptPath = '/';
 132                 $wgArticlePath = '/wiki/$1';
 133                 $wgStyleSheetPath = '/skins';
 134                 $wgStylePath = '/skins';
 135                 $wgThumbnailScriptPath = false;
 136                 $wgLocalFileRepo = array(
 137                         'class' => 'LocalRepo',
 138                         'name' => 'local',
 139                         'directory' => wfTempDir() . '/test-repo',
 140                         'url' => 'http://example.com/images',
 141                         'deletedDir' => wfTempDir() . '/test-repo/delete',
 142                         'hashLevels' => 2,
 143                         'transformVia404' => false,
 144                 );
 145                 $wgNamespaceProtection[NS_MEDIAWIKI] = 'editinterface';
 146                 $wgNamespaceAliases['Image'] = NS_FILE;
 147                 $wgNamespaceAliases['Image_talk'] = NS_FILE_TALK;
 148
 149
 150                 $wgEnableParserCache = false;
 151                 $wgDeferredUpdateList = array();
 152                 $wgMemc = &wfGetMainCache();
 153                 $messageMemc = &wfGetMessageCacheStorage();
 154                 $parserMemc = &wfGetParserCacheStorage();
 155
 156                 // $wgContLang = new StubContLang;
 157                 $wgUser = new User;
 158                 $wgLang = new StubUserLang;
 159                 $wgOut = new StubObject( 'wgOut', 'OutputPage' );
 160                 $wgParser = new StubObject( 'wgParser', $wgParserConf['class'], array( $wgParserConf ) );
 161                 $wgRequest = new WebRequest;
 162
 163                 $wgMessageCache = new StubObject( 'wgMessageCache', 'MessageCache',
 164                                                                                   array( $messageMemc, $wgUseDatabaseMessages,
 165                                                                                                  $wgMsgCacheExpiry ) );
 166                 if ( $wgStyleDirectory === false ) {
 167                         $wgStyleDirectory   = "$IP/skins";
 168                 }
 169
 170         }
 171
 172         public function setupRecorder ( $options ) {
 173                 if ( isset( $options['record'] ) ) {
 174                         $this->recorder = new DbTestRecorder( $this );
 175                         $this->recorder->version = isset( $options['setversion'] ) ?
 176                                         $options['setversion'] : SpecialVersion::getVersion();
 177                 } elseif ( isset( $options['compare'] ) ) {
 178                         $this->recorder = new DbTestPreviewer( $this );
 179                 } elseif ( isset( $options['upload'] ) ) {
 180                         $this->recorder = new RemoteTestRecorder( $this );
 181                 } else {
 182                         $this->recorder = new TestRecorder( $this );
 183                 }
 184         }
 185
 186         /**
 187          * Remove last character if it is a newline
 188          * @group utility
 189          */
 190         static public function chomp( $s ) {
 191                 if ( substr( $s, -1 ) === "\n" ) {
 192                         return substr( $s, 0, -1 );
 193                 }
 194                 else {
 195                         return $s;
 196                 }
 197         }
 198
 199         /**
 200          * Run a fuzz test series
 201          * Draw input from a set of test files
 202          */
 203         function fuzzTest( $filenames ) {
 204                 $GLOBALS['wgContLang'] = Language::factory( 'en' );
 205                 $dict = $this->getFuzzInput( $filenames );
 206                 $dictSize = strlen( $dict );
 207                 $logMaxLength = log( $this->maxFuzzTestLength );
 208                 $this->setupDatabase();
 209                 ini_set( 'memory_limit', $this->memoryLimit * 1048576 );
 210
 211                 $numTotal = 0;
 212                 $numSuccess = 0;
 213                 $user = new User;
 214                 $opts = ParserOptions::newFromUser( $user );
 215                 $title = Title::makeTitle( NS_MAIN, 'Parser_test' );
 216
 217                 while ( true ) {
 218                         // Generate test input
 219                         mt_srand( ++$this->fuzzSeed );
 220                         $totalLength = mt_rand( 1, $this->maxFuzzTestLength );
 221                         $input = '';
 222
 223                         while ( strlen( $input ) < $totalLength ) {
 224                                 $logHairLength = mt_rand( 0, 1000000 ) / 1000000 * $logMaxLength;
 225                                 $hairLength = min( intval( exp( $logHairLength ) ), $dictSize );
 226                                 $offset = mt_rand( 0, $dictSize - $hairLength );
 227                                 $input .= substr( $dict, $offset, $hairLength );
 228                         }
 229
 230                         $this->setupGlobals();
 231                         $parser = $this->getParser();
 232
 233                         // Run the test
 234                         try {
 235                                 $parser->parse( $input, $title, $opts );
 236                                 $fail = false;
 237                         } catch ( Exception $exception ) {
 238                                 $fail = true;
 239                         }
 240
 241                         if ( $fail ) {
 242                                 echo "Test failed with seed {$this->fuzzSeed}\n";
 243                                 echo "Input:\n";
 244                                 var_dump( $input );
 245                                 echo "\n\n";
 246                                 echo "$exception\n";
 247                         } else {
 248                                 $numSuccess++;
 249                         }
 250
 251                         $numTotal++;
 252                         $this->teardownGlobals();
 253                         $parser->__destruct();
 254
 255                         if ( $numTotal % 100 == 0 ) {
 256                                 $usage = intval( memory_get_usage( true ) / $this->memoryLimit / 1048576 * 100 );
 257                                 echo "{$this->fuzzSeed}: $numSuccess/$numTotal (mem: $usage%)\n";
 258                                 if ( $usage > 90 ) {
 259                                         echo "Out of memory:\n";
 260                                         $memStats = $this->getMemoryBreakdown();
 261
 262                                         foreach ( $memStats as $name => $usage ) {
 263                                                 echo "$name: $usage\n";
 264                                         }
 265                                         $this->abort();
 266                                 }
 267                         }
 268                 }
 269         }
 270
 271         /**
 272          * Get an input dictionary from a set of parser test files
 273          */
 274         function getFuzzInput( $filenames ) {
 275                 $dict = '';
 276
 277                 foreach ( $filenames as $filename ) {
 278                         $contents = file_get_contents( $filename );
 279                         preg_match_all( '/!!\s*input\n(.*?)\n!!\s*result/s', $contents, $matches );
 280
 281                         foreach ( $matches[1] as $match ) {
 282                                 $dict .= $match . "\n";
 283                         }
 284                 }
 285
 286                 return $dict;
 287         }
 288
 289         /**
 290          * Get a memory usage breakdown
 291          */
 292         function getMemoryBreakdown() {
 293                 $memStats = array();
 294
 295                 foreach ( $GLOBALS as $name => $value ) {
 296                         $memStats['$' . $name] = strlen( serialize( $value ) );
 297                 }
 298
 299                 $classes = get_declared_classes();
 300
 301                 foreach ( $classes as $class ) {
 302                         $rc = new ReflectionClass( $class );
 303                         $props = $rc->getStaticProperties();
 304                         $memStats[$class] = strlen( serialize( $props ) );
 305                         $methods = $rc->getMethods();
 306
 307                         foreach ( $methods as $method ) {
 308                                 $memStats[$class] += strlen( serialize( $method->getStaticVariables() ) );
 309                         }
 310                 }
 311
 312                 $functions = get_defined_functions();
 313
 314                 foreach ( $functions['user'] as $function ) {
 315                         $rf = new ReflectionFunction( $function );
 316                         $memStats["$function()"] = strlen( serialize( $rf->getStaticVariables() ) );
 317                 }
 318
 319                 asort( $memStats );
 320
 321                 return $memStats;
 322         }
 323
 324         function abort() {
 325                 $this->abort();
 326         }
 327
 328         /**
 329          * Run a series of tests listed in the given text files.
 330          * Each test consists of a brief description, wikitext input,
 331          * and the expected HTML output.
 332          *
 333          * Prints status updates on stdout and counts up the total
 334          * number and percentage of passed tests.
 335          *
 336          * @param $filenames Array of strings
 337          * @return Boolean: true if passed all tests, false if any tests failed.
 338          */
 339         public function runTestsFromFiles( $filenames ) {
 340                 $ok = false;
 341                 $GLOBALS['wgContLang'] = Language::factory( 'en' );
 342                 $this->recorder->start();
 343                 try {
 344                         $this->setupDatabase();
 345                         $ok = true;
 346
 347                         foreach ( $filenames as $filename ) {
 348                                 $tests = new TestFileIterator( $filename, $this );
 349                                 $ok = $this->runTests( $tests ) && $ok;
 350                         }
 351
 352                         $this->teardownDatabase();
 353                         $this->recorder->report();
 354                 } catch (DBError $e) {
 355                         echo $e->getMessage();
 356                 }
 357                 $this->recorder->end();
 358
 359                 return $ok;
 360         }
 361
 362         function runTests( $tests ) {
 363                 $ok = true;
 364
 365                 foreach ( $tests as $t ) {
 366                         $result =
 367                                 $this->runTest( $t['test'], $t['input'], $t['result'], $t['options'], $t['config'] );
 368                         $ok = $ok && $result;
 369                         $this->recorder->record( $t['test'], $result );
 370                 }
 371
 372                 if ( $this->showProgress ) {
 373                         print "\n";
 374                 }
 375
 376                 return $ok;
 377         }
 378
 379         /**
 380          * Get a Parser object
 381          */
 382         function getParser( $preprocessor = null ) {
 383                 global $wgParserConf;
 384
 385                 $class = $wgParserConf['class'];
 386                 $parser = new $class( array( 'preprocessorClass' => $preprocessor ) + $wgParserConf );
 387
 388                 foreach ( $this->hooks as $tag => $callback ) {
 389                         $parser->setHook( $tag, $callback );
 390                 }
 391
 392                 foreach ( $this->functionHooks as $tag => $bits ) {
 393                         list( $callback, $flags ) = $bits;
 394                         $parser->setFunctionHook( $tag, $callback, $flags );
 395                 }
 396
 397                 wfRunHooks( 'ParserTestParser', array( &$parser ) );
 398
 399                 return $parser;
 400         }
 401
 402         /**
 403          * Run a given wikitext input through a freshly-constructed wiki parser,
 404          * and compare the output against the expected results.
 405          * Prints status and explanatory messages to stdout.
 406          *
 407          * @param $desc String: test's description
 408          * @param $input String: wikitext to try rendering
 409          * @param $result String: result to output
 410          * @param $opts Array: test's options
 411          * @param $config String: overrides for global variables, one per line
 412          * @return Boolean
 413          */
 414         public function runTest( $desc, $input, $result, $opts, $config ) {
 415                 if ( $this->showProgress ) {
 416                         $this->showTesting( $desc );
 417                 }
 418
 419                 $opts = $this->parseOptions( $opts );
 420                 $this->setupGlobals( $opts, $config );
 421
 422                 $user = new User();
 423                 $options = ParserOptions::newFromUser( $user );
 424
 425                 if ( isset( $opts['title'] ) ) {
 426                         $titleText = $opts['title'];
 427                 }
 428                 else {
 429                         $titleText = 'Parser test';
 430                 }
 431
 432                 $local = isset( $opts['local'] );
 433                 $preprocessor = isset( $opts['preprocessor'] ) ? $opts['preprocessor'] : null;
 434                 $parser = $this->getParser( $preprocessor );
 435                 $title = Title::newFromText( $titleText );
 436
 437                 if ( isset( $opts['pst'] ) ) {
 438                         $out = $parser->preSaveTransform( $input, $title, $user, $options );
 439                 } elseif ( isset( $opts['msg'] ) ) {
 440                         $out = $parser->transformMsg( $input, $options );
 441                 } elseif ( isset( $opts['section'] ) ) {
 442                         $section = $opts['section'];
 443                         $out = $parser->getSection( $input, $section );
 444                 } elseif ( isset( $opts['replace'] ) ) {
 445                         $section = $opts['replace'][0];
 446                         $replace = $opts['replace'][1];
 447                         $out = $parser->replaceSection( $input, $section, $replace );
 448                 } elseif ( isset( $opts['comment'] ) ) {
 449                         $linker = $user->getSkin();
 450                         $out = $linker->formatComment( $input, $title, $local );
 451                 } elseif ( isset( $opts['preload'] ) ) {
 452                         $out = $parser->getpreloadText( $input, $title, $options );
 453                 } else {
 454                         $output = $parser->parse( $input, $title, $options, true, true, 1337 );
 455                         $out = $output->getText();
 456
 457                         if ( isset( $opts['showtitle'] ) ) {
 458                                 if ( $output->getTitleText() ) {
 459                                         $title = $output->getTitleText();
 460                                 }
 461
 462                                 $out = "$title\n$out";
 463                         }
 464
 465                         if ( isset( $opts['ill'] ) ) {
 466                                 $out = $this->tidy( implode( ' ', $output->getLanguageLinks() ) );
 467                         } elseif ( isset( $opts['cat'] ) ) {
 468                                 global $wgOut;
 469
 470                                 $wgOut->addCategoryLinks( $output->getCategories() );
 471                                 $cats = $wgOut->getCategoryLinks();
 472
 473                                 if ( isset( $cats['normal'] ) ) {
 474                                         $out = $this->tidy( implode( ' ', $cats['normal'] ) );
 475                                 } else {
 476                                         $out = '';
 477                                 }
 478                         }
 479
 480                         $result = $this->tidy( $result );
 481                 }
 482
 483                 $this->teardownGlobals();
 484                 return $this->showTestResult( $desc, $result, $out );
 485         }
 486
 487         /**
 488          *
 489          */
 490         function showTestResult( $desc, $result, $out ) {
 491                 if ( $result === $out ) {
 492                         $this->showSuccess( $desc );
 493                         return true;
 494                 } else {
 495                         $this->showFailure( $desc, $result, $out );
 496                         return false;
 497                 }
 498         }
 499
 500         /**
 501          * Use a regex to find out the value of an option
 502          * @param $key String: name of option val to retrieve
 503          * @param $opts Options array to look in
 504          * @param $default Mixed: default value returned if not found
 505          */
 506         private static function getOptionValue( $key, $opts, $default ) {
 507                 $key = strtolower( $key );
 508
 509                 if ( isset( $opts[$key] ) ) {
 510                         return $opts[$key];
 511                 } else {
 512                         return $default;
 513                 }
 514         }
 515
 516         private function parseOptions( $instring ) {
 517                 $opts = array();
 518                 // foo
 519                 // foo=bar
 520                 // foo="bar baz"
 521                 // foo=[[bar baz]]
 522                 // foo=bar,"baz quux"
 523                 $regex = '/\b
 524                         ([\w-]+)                                                # Key
 525                         \b
 526                         (?:\s*
 527                                 =                                               # First sub-value
 528                                 \s*
 529                                 (
 530                                         "
 531                                                 [^"]*                   # Quoted val
 532                                         "
 533                                 |
 534                                         \[\[
 535                                                 [^]]*                   # Link target
 536                                         \]\]
 537                                 |
 538                                         [\w-]+                          # Plain word
 539                                 )
 540                                 (?:\s*
 541                                         ,                                       # Sub-vals 1..N
 542                                         \s*
 543                                         (
 544                                                 "[^"]*"                 # Quoted val
 545                                         |
 546                                                 \[\[[^]]*\]\]   # Link target
 547                                         |
 548                                                 [\w-]+                  # Plain word
 549                                         )
 550                                 )*
 551                         )?
 552                         /x';
 553
 554                 if ( preg_match_all( $regex, $instring, $matches, PREG_SET_ORDER ) ) {
 555                         foreach ( $matches as $bits ) {
 556                                 array_shift( $bits );
 557                                 $key = strtolower( array_shift( $bits ) );
 558                                 if ( count( $bits ) == 0 ) {
 559                                         $opts[$key] = true;
 560                                 } elseif ( count( $bits ) == 1 ) {
 561                                         $opts[$key] = $this->cleanupOption( array_shift( $bits ) );
 562                                 } else {
 563                                         // Array!
 564                                         $opts[$key] = array_map( array( $this, 'cleanupOption' ), $bits );
 565                                 }
 566                         }
 567                 }
 568                 return $opts;
 569         }
 570
 571         private function cleanupOption( $opt ) {
 572                 if ( substr( $opt, 0, 1 ) == '"' ) {
 573                         return substr( $opt, 1, -1 );
 574                 }
 575
 576                 if ( substr( $opt, 0, 2 ) == '[[' ) {
 577                         return substr( $opt, 2, -2 );
 578                 }
 579                 return $opt;
 580         }
 581
 582         /**
 583          * Set up the global variables for a consistent environment for each test.
 584          * Ideally this should replace the global configuration entirely.
 585          */
 586         private function setupGlobals( $opts = '', $config = '' ) {
 587                 global $wgDBtype;
 588
 589                 # Find out values for some special options.
 590                 $lang =
 591                         self::getOptionValue( 'language', $opts, 'en' );
 592                 $variant =
 593                         self::getOptionValue( 'variant', $opts, false );
 594                 $maxtoclevel =
 595                         self::getOptionValue( 'wgMaxTocLevel', $opts, 999 );
 596                 $linkHolderBatchSize =
 597                         self::getOptionValue( 'wgLinkHolderBatchSize', $opts, 1000 );
 598
 599                 $settings = array(
 600                         'wgServer' => 'http://Britney-Spears',
 601                         'wgScript' => '/index.php',
 602                         'wgScriptPath' => '/',
 603                         'wgArticlePath' => '/wiki/$1',
 604                         'wgActionPaths' => array(),
 605                         'wgLocalFileRepo' => array(
 606                                 'class' => 'LocalRepo',
 607                                 'name' => 'local',
 608                                 'directory' => $this->uploadDir,
 609                                 'url' => 'http://example.com/images',
 610                                 'hashLevels' => 2,
 611                                 'transformVia404' => false,
 612                         ),
 613                         'wgEnableUploads' => self::getOptionValue( 'wgEnableUploads', $opts, true ),
 614                         'wgStylePath' => '/skins',
 615                         'wgStyleSheetPath' => '/skins',
 616                         'wgSitename' => 'MediaWiki',
 617                         'wgLanguageCode' => $lang,
 618                         'wgDBprefix' => $wgDBtype != 'oracle' ? 'parsertest_' : 'pt_',
 619                         'wgRawHtml' => isset( $opts['rawhtml'] ),
 620                         'wgLang' => null,
 621                         'wgContLang' => null,
 622                         'wgNamespacesWithSubpages' => array( 0 => isset( $opts['subpage'] ) ),
 623                         'wgMaxTocLevel' => $maxtoclevel,
 624                         'wgCapitalLinks' => true,
 625                         'wgNoFollowLinks' => true,
 626                         'wgNoFollowDomainExceptions' => array(),
 627                         'wgThumbnailScriptPath' => false,
 628                         'wgUseImageResize' => false,
 629                         'wgUseTeX' => isset( $opts['math'] ),
 630                         'wgMathDirectory' => $this->uploadDir . '/math',
 631                         'wgLocaltimezone' => 'UTC',
 632                         'wgAllowExternalImages' => true,
 633                         'wgUseTidy' => false,
 634                         'wgDefaultLanguageVariant' => $variant,
 635                         'wgVariantArticlePath' => false,
 636                         'wgGroupPermissions' => array( '*' => array(
 637                                 'createaccount' => true,
 638                                 'read'          => true,
 639                                 'edit'          => true,
 640                                 'createpage'    => true,
 641                                 'createtalk'    => true,
 642                         ) ),
 643                         'wgNamespaceProtection' => array( NS_MEDIAWIKI => 'editinterface' ),
 644                         'wgDefaultExternalStore' => array(),
 645                         'wgForeignFileRepos' => array(),
 646                         'wgLinkHolderBatchSize' => $linkHolderBatchSize,
 647                         'wgExperimentalHtmlIds' => false,
 648                         'wgExternalLinkTarget' => false,
 649                         'wgAlwaysUseTidy' => false,
 650                         'wgHtml5' => true,
 651                         'wgWellFormedXml' => true,
 652                         'wgAllowMicrodataAttributes' => true,
 653                 );
 654
 655                 if ( $config ) {
 656                         $configLines = explode( "\n", $config );
 657
 658                         foreach ( $configLines as $line ) {
 659                                 list( $var, $value ) = explode( '=', $line, 2 );
 660
 661                                 $settings[$var] = eval( "return $value;" );
 662                         }
 663                 }
 664
 665                 $this->savedGlobals = array();
 666
 667                 foreach ( $settings as $var => $val ) {
 668                         if ( array_key_exists( $var, $GLOBALS ) ) {
 669                                 $this->savedGlobals[$var] = $GLOBALS[$var];
 670                         }
 671
 672                         $GLOBALS[$var] = $val;
 673                 }
 674
 675                 $langObj = Language::factory( $lang );
 676                 $GLOBALS['wgLang'] = $langObj;
 677                 $GLOBALS['wgContLang'] = $langObj;
 678                 $GLOBALS['wgMemc'] = new FakeMemCachedClient;
 679                 $GLOBALS['wgOut'] = new OutputPage;
 680
 681                 global $wgHooks;
 682
 683                 $wgHooks['ParserTestParser'][] = 'ParserTestParserHook::setup';
 684                 $wgHooks['ParserTestParser'][] = 'ParserTestStaticParserHook::setup';
 685                 $wgHooks['ParserGetVariableValueTs'][] = 'ParserTest::getFakeTimestamp';
 686
 687                 MagicWord::clearCache();
 688
 689                 global $wgUser;
 690                 $wgUser = new User();
 691         }
 692
 693         /**
 694          * List of temporary tables to create, without prefix.
 695          * Some of these probably aren't necessary.
 696          */
 697         private function listTables() {
 698                 global $wgDBtype;
 699
 700                 $tables = array( 'user', 'user_properties', 'page', 'page_restrictions',
 701                         'protected_titles', 'revision', 'text', 'pagelinks', 'imagelinks',
 702                         'categorylinks', 'templatelinks', 'externallinks', 'langlinks', 'iwlinks',
 703                         'site_stats', 'hitcounter',     'ipblocks', 'image', 'oldimage',
 704                         'recentchanges', 'watchlist', 'math', 'interwiki', 'logging',
 705                         'querycache', 'objectcache', 'job', 'l10n_cache', 'redirect', 'querycachetwo',
 706                         'archive', 'user_groups', 'page_props', 'category', 'msg_resource', 'msg_resource_links'
 707                 );
 708
 709                 if ( in_array( $wgDBtype, array( 'mysql', 'sqlite', 'oracle' ) ) )
 710                         array_push( $tables, 'searchindex' );
 711
 712                 // Allow extensions to add to the list of tables to duplicate;
 713                 // may be necessary if they hook into page save or other code
 714                 // which will require them while running tests.
 715                 wfRunHooks( 'ParserTestTables', array( &$tables ) );
 716
 717                 return $tables;
 718         }
 719
 720         /**
 721          * Set up a temporary set of wiki tables to work with for the tests.
 722          * Currently this will only be done once per run, and any changes to
 723          * the db will be visible to later tests in the run.
 724          */
 725         public function setupDatabase() {
 726                 global $wgDBprefix, $wgDBtype;
 727
 728                 if ( $this->databaseSetupDone ) {
 729                         return;
 730                 }
 731
 732                 if ( $wgDBprefix === 'parsertest_' || ( $wgDBtype == 'oracle' && $wgDBprefix === 'pt_' ) ) {
 733                         throw new MWException( 'setupDatabase should be called before setupGlobals' );
 734                 }
 735
 736                 $this->databaseSetupDone = true;
 737                 $this->oldTablePrefix = $wgDBprefix;
 738
 739                 # SqlBagOStuff broke when using temporary tables on r40209 (bug 15892).
 740                 # It seems to have been fixed since (r55079?).
 741                 # If it fails, $wgCaches[CACHE_DB] = new HashBagOStuff(); should work around it.
 742
 743                 # CREATE TEMPORARY TABLE breaks if there is more than one server
 744                 if ( wfGetLB()->getServerCount() != 1 ) {
 745                         $this->useTemporaryTables = false;
 746                 }
 747
 748                 $temporary = $this->useTemporaryTables || $wgDBtype == 'postgres';
 749
 750                 $db = wfGetDB( DB_MASTER );
 751                 $tables = $this->listTables();
 752
 753                 foreach ( $tables as $tbl ) {
 754                         # Clean up from previous aborted run.  So that table escaping
 755                         # works correctly across DB engines, we need to change the pre-
 756                         # fix back and forth so tableName() works right.
 757                         $this->changePrefix( $this->oldTablePrefix );
 758                         $oldTableName = $db->tableName( $tbl );
 759                         $this->changePrefix( $wgDBtype != 'oracle' ? 'parsertest_' : 'pt_' );
 760                         $newTableName = $db->tableName( $tbl );
 761
 762                         if ( $wgDBtype == 'mysql' ) {
 763                                 $db->query( "DROP TABLE IF EXISTS $newTableName" );
 764                         } elseif ( in_array( $wgDBtype, array( 'postgres', 'oracle' ) ) ) {
 765                                 /* DROPs wouldn't work due to Foreign Key Constraints (bug 14990, r58669)
 766                                  * Use "DROP TABLE IF EXISTS $newTableName CASCADE" for postgres? That
 767                                  * syntax would also work for mysql.
 768                                  */
 769                         } elseif ( $db->tableExists( $tbl ) ) {
 770                                 $db->query( "DROP TABLE $newTableName" );
 771                         }
 772
 773                         # Create new table
 774                         $db->duplicateTableStructure( $oldTableName, $newTableName, $temporary );
 775                 }
 776
 777                 if ( $wgDBtype == 'oracle' )
 778                         $db->query( 'BEGIN FILL_WIKI_INFO; END;' );
 779
 780                 $this->changePrefix( $wgDBtype != 'oracle' ? 'parsertest_' : 'pt_' );
 781
 782                 if ( $wgDBtype == 'oracle' ) {
 783                         # Insert 0 user to prevent FK violations
 784
 785                         # Anonymous user
 786                         $db->insert( 'user', array(
 787                                 'user_id'         => 0,
 788                                 'user_name'       => 'Anonymous' ) );
 789                 }
 790
 791                 # Hack: insert a few Wikipedia in-project interwiki prefixes,
 792                 # for testing inter-language links
 793                 $db->insert( 'interwiki', array(
 794                         array( 'iw_prefix' => 'wikipedia',
 795                                    'iw_url'    => 'http://en.wikipedia.org/wiki/$1',
 796                                    'iw_api'    => '',
 797                                    'iw_wikiid' => '',
 798                                    'iw_local'  => 0 ),
 799                         array( 'iw_prefix' => 'meatball',
 800                                    'iw_url'    => 'http://www.usemod.com/cgi-bin/mb.pl?$1',
 801                                    'iw_api'    => '',
 802                                    'iw_wikiid' => '',
 803                                    'iw_local'  => 0 ),
 804                         array( 'iw_prefix' => 'zh',
 805                                    'iw_url'    => 'http://zh.wikipedia.org/wiki/$1',
 806                                    'iw_api'    => '',
 807                                    'iw_wikiid' => '',
 808                                    'iw_local'  => 1 ),
 809                         array( 'iw_prefix' => 'es',
 810                                    'iw_url'    => 'http://es.wikipedia.org/wiki/$1',
 811                                    'iw_api'    => '',
 812                                    'iw_wikiid' => '',
 813                                    'iw_local'  => 1 ),
 814                         array( 'iw_prefix' => 'fr',
 815                                    'iw_url'    => 'http://fr.wikipedia.org/wiki/$1',
 816                                    'iw_api'    => '',
 817                                    'iw_wikiid' => '',
 818                                    'iw_local'  => 1 ),
 819                         array( 'iw_prefix' => 'ru',
 820                                    'iw_url'    => 'http://ru.wikipedia.org/wiki/$1',
 821                                    'iw_api'    => '',
 822                                    'iw_wikiid' => '',
 823                                    'iw_local'  => 1 ),
 824                         ) );
 825
 826
 827                 # Update certain things in site_stats
 828                 $db->insert( 'site_stats', array( 'ss_row_id' => 1, 'ss_images' => 2, 'ss_good_articles' => 1 ) );
 829
 830                 # Reinitialise the LocalisationCache to match the database state
 831                 Language::getLocalisationCache()->unloadAll();
 832
 833                 # Make a new message cache
 834                 global $wgMessageCache, $wgMemc;
 835                 $wgMessageCache = new MessageCache( $wgMemc, true, 3600 );
 836
 837                 $this->uploadDir = $this->setupUploadDir();
 838                 $user = User::createNew( 'WikiSysop' );
 839                 $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Foobar.jpg' ) );
 840                 $image->recordUpload2( '', 'Upload of some lame file', 'Some lame file', array(
 841                         'size'        => 12345,
 842                         'width'       => 1941,
 843                         'height'      => 220,
 844                         'bits'        => 24,
 845                         'media_type'  => MEDIATYPE_BITMAP,
 846                         'mime'        => 'image/jpeg',
 847                         'metadata'    => serialize( array() ),
 848                         'sha1'        => wfBaseConvert( '', 16, 36, 31 ),
 849                         'fileExists'  => true
 850                         ), $db->timestamp( '20010115123500' ), $user );
 851
 852                 # This image will be blacklisted in [[MediaWiki:Bad image list]]
 853                 $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Bad.jpg' ) );
 854                 $image->recordUpload2( '', 'zomgnotcensored', 'Borderline image', array(
 855                         'size'        => 12345,
 856                         'width'       => 320,
 857                         'height'      => 240,
 858                         'bits'        => 24,
 859                         'media_type'  => MEDIATYPE_BITMAP,
 860                         'mime'        => 'image/jpeg',
 861                         'metadata'    => serialize( array() ),
 862                         'sha1'        => wfBaseConvert( '', 16, 36, 31 ),
 863                         'fileExists'  => true
 864                         ), $db->timestamp( '20010115123500' ), $user );
 865         }
 866
 867         /**
 868          * Change the table prefix on all open DB connections/
 869          */
 870         protected function changePrefix( $prefix ) {
 871                 global $wgDBprefix;
 872                 wfGetLBFactory()->forEachLB( array( $this, 'changeLBPrefix' ), array( $prefix ) );
 873                 $wgDBprefix = $prefix;
 874         }
 875
 876         public function changeLBPrefix( $lb, $prefix ) {
 877                 $lb->forEachOpenConnection( array( $this, 'changeDBPrefix' ), array( $prefix ) );
 878         }
 879
 880         public function changeDBPrefix( $db, $prefix ) {
 881                 $db->tablePrefix( $prefix );
 882         }
 883
 884         public function teardownDatabase() {
 885                 global $wgDBtype;
 886
 887                 if ( !$this->databaseSetupDone ) {
 888                         $this->teardownGlobals();
 889                         return;
 890                 }
 891                 $this->teardownUploadDir( $this->uploadDir );
 892
 893                 $this->changePrefix( $this->oldTablePrefix );
 894                 $this->databaseSetupDone = false;
 895
 896                 if ( $this->useTemporaryTables ) {
 897                         # Don't need to do anything
 898                         $this->teardownGlobals();
 899                         return;
 900                 }
 901
 902                 $tables = $this->listTables();
 903                 $db = wfGetDB( DB_MASTER );
 904
 905                 foreach ( $tables as $table ) {
 906                         $sql = $wgDBtype == 'oracle' ? "DROP TABLE pt_$table DROP CONSTRAINTS" : "DROP TABLE `parsertest_$table`";
 907                         $db->query( $sql );
 908                 }
 909
 910                 if ( $wgDBtype == 'oracle' )
 911                         $db->query( 'BEGIN FILL_WIKI_INFO; END;' );
 912
 913                 $this->teardownGlobals();
 914         }
 915
 916         /**
 917          * Create a dummy uploads directory which will contain a couple
 918          * of files in order to pass existence tests.
 919          *
 920          * @return String: the directory
 921          */
 922         private function setupUploadDir() {
 923                 global $IP;
 924
 925                 if ( $this->keepUploads ) {
 926                         $dir = wfTempDir() . '/mwParser-images';
 927
 928                         if ( is_dir( $dir ) ) {
 929                                 return $dir;
 930                         }
 931                 } else {
 932                         $dir = wfTempDir() . "/mwParser-" . mt_rand() . "-images";
 933                 }
 934
 935                 // wfDebug( "Creating upload directory $dir\n" );
 936                 if ( file_exists( $dir ) ) {
 937                         wfDebug( "Already exists!\n" );
 938                         return $dir;
 939                 }
 940
 941                 wfMkdirParents( $dir . '/3/3a' );
 942                 copy( "$IP/skins/monobook/headbg.jpg", "$dir/3/3a/Foobar.jpg" );
 943                 wfMkdirParents( $dir . '/0/09' );
 944                 copy( "$IP/skins/monobook/headbg.jpg", "$dir/0/09/Bad.jpg" );
 945
 946                 return $dir;
 947         }
 948
 949         /**
 950          * Restore default values and perform any necessary clean-up
 951          * after each test runs.
 952          */
 953         private function teardownGlobals() {
 954                 RepoGroup::destroySingleton();
 955                 LinkCache::singleton()->clear();
 956
 957                 foreach ( $this->savedGlobals as $var => $val ) {
 958                         $GLOBALS[$var] = $val;
 959                 }
 960         }
 961
 962         /**
 963          * Remove the dummy uploads directory
 964          */
 965         private function teardownUploadDir( $dir ) {
 966                 if ( $this->keepUploads ) {
 967                         return;
 968                 }
 969
 970                 // delete the files first, then the dirs.
 971                 self::deleteFiles(
 972                         array (
 973                                 "$dir/3/3a/Foobar.jpg",
 974                                 "$dir/thumb/3/3a/Foobar.jpg/180px-Foobar.jpg",
 975                                 "$dir/thumb/3/3a/Foobar.jpg/200px-Foobar.jpg",
 976                                 "$dir/thumb/3/3a/Foobar.jpg/640px-Foobar.jpg",
 977                                 "$dir/thumb/3/3a/Foobar.jpg/120px-Foobar.jpg",
 978
 979                                 "$dir/0/09/Bad.jpg",
 980
 981                                 "$dir/math/f/a/5/fa50b8b616463173474302ca3e63586b.png",
 982                         )
 983                 );
 984
 985                 self::deleteDirs(
 986                         array (
 987                                 "$dir/3/3a",
 988                                 "$dir/3",
 989                                 "$dir/thumb/6/65",
 990                                 "$dir/thumb/6",
 991                                 "$dir/thumb/3/3a/Foobar.jpg",
 992                                 "$dir/thumb/3/3a",
 993                                 "$dir/thumb/3",
 994
 995                                 "$dir/0/09/",
 996                                 "$dir/0/",
 997                                 "$dir/thumb",
 998                                 "$dir/math/f/a/5",
 999                                 "$dir/math/f/a",
1000                                 "$dir/math/f",
1001                                 "$dir/math",
1002                                 "$dir",
1003                         )
1004                 );
1005         }
1006
1007         /**
1008          * Delete the specified files, if they exist.
1009          * @param $files Array: full paths to files to delete.
1010          */
1011         private static function deleteFiles( $files ) {
1012                 foreach ( $files as $file ) {
1013                         if ( file_exists( $file ) ) {
1014                                 unlink( $file );
1015                         }
1016                 }
1017         }
1018
1019         /**
1020          * Delete the specified directories, if they exist. Must be empty.
1021          * @param $dirs Array: full paths to directories to delete.
1022          */
1023         private static function deleteDirs( $dirs ) {
1024                 foreach ( $dirs as $dir ) {
1025                         if ( is_dir( $dir ) ) {
1026                                 rmdir( $dir );
1027                         }
1028                 }
1029         }
1030
1031         /**
1032          * "Running test $desc..."
1033          */
1034         protected function showTesting( $desc ) {
1035                 print "Running test $desc... ";
1036         }
1037
1038         /**
1039          * Print a happy success message.
1040          *
1041          * @param $desc String: the test name
1042          * @return Boolean
1043          */
1044         protected function showSuccess( $desc ) {
1045                 if ( $this->showProgress ) {
1046                         print $this->term->color( '1;32' ) . 'PASSED' . $this->term->reset() . "\n";
1047                 }
1048
1049                 return true;
1050         }
1051
1052         /**
1053          * Print a failure message and provide some explanatory output
1054          * about what went wrong if so configured.
1055          *
1056          * @param $desc String: the test name
1057          * @param $result String: expected HTML output
1058          * @param $html String: actual HTML output
1059          * @return Boolean
1060          */
1061         protected function showFailure( $desc, $result, $html ) {
1062                 if ( $this->showFailure ) {
1063                         if ( !$this->showProgress ) {
1064                                 # In quiet mode we didn't show the 'Testing' message before the
1065                                 # test, in case it succeeded. Show it now:
1066                                 $this->showTesting( $desc );
1067                         }
1068
1069                         print $this->term->color( '31' ) . 'FAILED!' . $this->term->reset() . "\n";
1070
1071                         if ( $this->showOutput ) {
1072                                 print "--- Expected ---\n$result\n--- Actual ---\n$html\n";
1073                         }
1074
1075                         if ( $this->showDiffs ) {
1076                                 print $this->quickDiff( $result, $html );
1077                                 if ( !$this->wellFormed( $html ) ) {
1078                                         print "XML error: $this->mXmlError\n";
1079                                 }
1080                         }
1081                 }
1082
1083                 return false;
1084         }
1085
1086         /**
1087          * Run given strings through a diff and return the (colorized) output.
1088          * Requires writable /tmp directory and a 'diff' command in the PATH.
1089          *
1090          * @param $input String
1091          * @param $output String
1092          * @param $inFileTail String: tailing for the input file name
1093          * @param $outFileTail String: tailing for the output file name
1094          * @return String
1095          */
1096         protected function quickDiff( $input, $output, $inFileTail = 'expected', $outFileTail = 'actual' ) {
1097                 $prefix = wfTempDir() . "/mwParser-" . mt_rand();
1098
1099                 $infile = "$prefix-$inFileTail";
1100                 $this->dumpToFile( $input, $infile );
1101
1102                 $outfile = "$prefix-$outFileTail";
1103                 $this->dumpToFile( $output, $outfile );
1104
1105                 $diff = `diff -au $infile $outfile`;
1106                 unlink( $infile );
1107                 unlink( $outfile );
1108
1109                 return $this->colorDiff( $diff );
1110         }
1111
1112         /**
1113          * Write the given string to a file, adding a final newline.
1114          *
1115          * @param $data String
1116          * @param $filename String
1117          */
1118         private function dumpToFile( $data, $filename ) {
1119                 $file = fopen( $filename, "wt" );
1120                 fwrite( $file, $data . "\n" );
1121                 fclose( $file );
1122         }
1123
1124         /**
1125          * Colorize unified diff output if set for ANSI color output.
1126          * Subtractions are colored blue, additions red.
1127          *
1128          * @param $text String
1129          * @return String
1130          */
1131         protected function colorDiff( $text ) {
1132                 return preg_replace(
1133                         array( '/^(-.*)$/m', '/^(\+.*)$/m' ),
1134                         array( $this->term->color( 34 ) . '$1' . $this->term->reset(),
1135                                    $this->term->color( 31 ) . '$1' . $this->term->reset() ),
1136                         $text );
1137         }
1138
1139         /**
1140          * Show "Reading tests from ..."
1141          *
1142          * @param $path String
1143          */
1144         public function showRunFile( $path ) {
1145                 print $this->term->color( 1 ) .
1146                         "Reading tests from \"$path\"..." .
1147                         $this->term->reset() .
1148                         "\n";
1149         }
1150
1151         /**
1152          * Insert a temporary test article
1153          * @param $name String: the title, including any prefix
1154          * @param $text String: the article text
1155          * @param $line Integer: the input line number, for reporting errors
1156          */
1157         static public function addArticle( $name, $text, $line = 'unknown' ) {
1158                 global $wgCapitalLinks;
1159
1160                 $text = self::chomp($text);
1161
1162                 $oldCapitalLinks = $wgCapitalLinks;
1163                 $wgCapitalLinks = true; // We only need this from SetupGlobals() See r70917#c8637
1164
1165                 $name = self::chomp( $name );
1166                 $title = Title::newFromText( $name );
1167
1168                 if ( is_null( $title ) ) {
1169                         wfDie( "invalid title ('$name' => '$title') at line $line\n" );
1170                 }
1171
1172                 $aid = $title->getArticleID( Title::GAID_FOR_UPDATE );
1173
1174                 if ( $aid != 0 ) {
1175                         debug_print_backtrace();
1176                         wfDie( "duplicate article '$name' at line $line\n" );
1177                 }
1178
1179                 $art = new Article( $title );
1180                 $art->insertNewArticle( $text, '', false, false );
1181
1182                 $wgCapitalLinks = $oldCapitalLinks;
1183         }
1184
1185         /**
1186          * Steal a callback function from the primary parser, save it for
1187          * application to our scary parser. If the hook is not installed,
1188          * abort processing of this file.
1189          *
1190          * @param $name String
1191          * @return Bool true if tag hook is present
1192          */
1193         public function requireHook( $name ) {
1194                 global $wgParser;
1195
1196                 $wgParser->firstCallInit( ); // make sure hooks are loaded.
1197
1198                 if ( isset( $wgParser->mTagHooks[$name] ) ) {
1199                         $this->hooks[$name] = $wgParser->mTagHooks[$name];
1200                 } else {
1201                         echo "   This test suite requires the '$name' hook extension, skipping.\n";
1202                         return false;
1203                 }
1204
1205                 return true;
1206         }
1207
1208         /**
1209          * Steal a callback function from the primary parser, save it for
1210          * application to our scary parser. If the hook is not installed,
1211          * abort processing of this file.
1212          *
1213          * @param $name String
1214          * @return Bool true if function hook is present
1215          */
1216         public function requireFunctionHook( $name ) {
1217                 global $wgParser;
1218
1219                 $wgParser->firstCallInit( ); // make sure hooks are loaded.
1220
1221                 if ( isset( $wgParser->mFunctionHooks[$name] ) ) {
1222                         $this->functionHooks[$name] = $wgParser->mFunctionHooks[$name];
1223                 } else {
1224                         echo "   This test suite requires the '$name' function hook extension, skipping.\n";
1225                         return false;
1226                 }
1227
1228                 return true;
1229         }
1230
1231         /*
1232          * Run the "tidy" command on text if the $wgUseTidy
1233          * global is true
1234          *
1235          * @param $text String: the text to tidy
1236          * @return String
1237          * @static
1238          */
1239         private function tidy( $text ) {
1240                 global $wgUseTidy;
1241
1242                 if ( $wgUseTidy ) {
1243                         $text = MWTidy::tidy( $text );
1244                 }
1245
1246                 return $text;
1247         }
1248
1249         private function wellFormed( $text ) {
1250                 $html =
1251                         Sanitizer::hackDocType() .
1252                         '<html>' .
1253                         $text .
1254                         '</html>';
1255
1256                 $parser = xml_parser_create( "UTF-8" );
1257
1258                 # case folding violates XML standard, turn it off
1259                 xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
1260
1261                 if ( !xml_parse( $parser, $html, true ) ) {
1262                         $err = xml_error_string( xml_get_error_code( $parser ) );
1263                         $position = xml_get_current_byte_index( $parser );
1264                         $fragment = $this->extractFragment( $html, $position );
1265                         $this->mXmlError = "$err at byte $position:\n$fragment";
1266                         xml_parser_free( $parser );
1267
1268                         return false;
1269                 }
1270
1271                 xml_parser_free( $parser );
1272
1273                 return true;
1274         }
1275
1276         private function extractFragment( $text, $position ) {
1277                 $start = max( 0, $position - 10 );
1278                 $before = $position - $start;
1279                 $fragment = '...' .
1280                         $this->term->color( 34 ) .
1281                         substr( $text, $start, $before ) .
1282                         $this->term->color( 0 ) .
1283                         $this->term->color( 31 ) .
1284                         $this->term->color( 1 ) .
1285                         substr( $text, $position, 1 ) .
1286                         $this->term->color( 0 ) .
1287                         $this->term->color( 34 ) .
1288                         substr( $text, $position + 1, 9 ) .
1289                         $this->term->color( 0 ) .
1290                         '...';
1291                 $display = str_replace( "\n", ' ', $fragment );
1292                 $caret = '   ' .
1293                         str_repeat( ' ', $before ) .
1294                         $this->term->color( 31 ) .
1295                         '^' .
1296                         $this->term->color( 0 );
1297
1298                 return "$display\n$caret";
1299         }
1300
1301         static function getFakeTimestamp( &$parser, &$ts ) {
1302                 $ts = 123;
1303                 return true;
1304         }
1305 }