maintenance/parserTests.php

   1 <?php
   2 # Copyright (C) 2004 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 # 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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  * @package MediaWiki
  24  * @subpackage Maintenance
  25  */
  26
  27 /** */
  28 $options = array( 'quick', 'color', 'quiet', 'help' );
  29 $optionsWithArgs = array( 'regex' );
  30
  31 require_once( 'commandLine.inc' );
  32 require_once( "$IP/includes/ObjectCache.php" );
  33 require_once( "$IP/languages/LanguageUtf8.php" );
  34
  35 /**
  36  * @package MediaWiki
  37  * @subpackage Maintenance
  38  */
  39 class ParserTest {
  40         /**
  41          * boolean $color whereas output should be colorized
  42          * @access private
  43          */
  44         var $color;
  45
  46         /**
  47          * boolean $lightcolor whereas output should use light colors
  48          * @access private
  49          */
  50         var $lightcolor;
  51
  52         /**
  53          * Sets terminal colorization and diff/quick modes depending on OS and
  54          * command-line options (--color and --quick).
  55          *
  56          * @access public
  57          */
  58         function ParserTest() {
  59                 global $options;
  60
  61                 # Only colorize output if stdout is a terminal.
  62                 $this->lightcolor = false;
  63                 $this->color = !wfIsWindows() && posix_isatty(1);
  64
  65                 if( isset( $options['color'] ) ) {
  66                         switch( $options['color'] ) {
  67                         case 'no':
  68                                 $this->color = false;
  69                                 break;
  70                         case 'light':
  71                                 $this->lightcolor = true;
  72                                 # Fall through
  73                         case 'yes':
  74                         default:
  75                                 $this->color = true;
  76                                 break;
  77                         }
  78                 }
  79
  80                 $this->showDiffs = !isset( $options['quick'] );
  81
  82                 $this->quiet = isset( $options['quiet'] );
  83
  84                 if (isset($options['regex'])) {
  85                         $this->regex = $options['regex'];
  86                 } else {
  87                         # Matches anything
  88                         $this->regex = '';
  89                 }
  90         }
  91
  92         /**
  93          * Remove last character if it is a newline
  94          * @access private
  95          */
  96         function chomp($s) {
  97                 if (substr($s, -1) === "\n") {
  98                         return substr($s, 0, -1);
  99                 }
 100                 else {
 101                         return $s;
 102                 }
 103         }
 104
 105         /**
 106          * Run a series of tests listed in the given text file.
 107          * Each test consists of a brief description, wikitext input,
 108          * and the expected HTML output.
 109          *
 110          * Prints status updates on stdout and counts up the total
 111          * number and percentage of passed tests.
 112          *
 113          * @param string $filename
 114          * @return bool True if passed all tests, false if any tests failed.
 115          * @access public
 116          */
 117         function runTestsFromFile( $filename ) {
 118                 $infile = fopen( $filename, 'rt' );
 119                 if( !$infile ) {
 120                         die( "Couldn't open parserTests.txt\n" );
 121                 }
 122
 123                 $data = array();
 124                 $section = null;
 125                 $success = 0;
 126                 $total = 0;
 127                 $n = 0;
 128                 while( false !== ($line = fgets( $infile ) ) ) {
 129                         $n++;
 130                         if( preg_match( '/^!!\s*(\w+)/', $line, $matches ) ) {
 131                                 $section = strtolower( $matches[1] );
 132                                 if( $section == 'endarticle') {
 133                                         if( !isset( $data['text'] ) ) {
 134                                                 die( "'endarticle' without 'text' at line $n\n" );
 135                                         }
 136                                         if( !isset( $data['article'] ) ) {
 137                                                 die( "'endarticle' without 'article' at line $n\n" );
 138                                         }
 139                                         $this->addArticle($this->chomp($data['article']), $this->chomp($data['text']), $n);
 140                                         $data = array();
 141                                         $section = null;
 142                                         continue;
 143                                 }
 144                                 if( $section == 'end' ) {
 145                                         if( !isset( $data['test'] ) ) {
 146                                                 die( "'end' without 'test' at line $n\n" );
 147                                         }
 148                                         if( !isset( $data['input'] ) ) {
 149                                                 die( "'end' without 'input' at line $n\n" );
 150                                         }
 151                                         if( !isset( $data['result'] ) ) {
 152                                                 die( "'end' without 'result' at line $n\n" );
 153                                         }
 154                                         if( !isset( $data['options'] ) ) {
 155                                                 $data['options'] = '';
 156                                         }
 157                                         else {
 158                                                 $data['options'] = $this->chomp( $data['options'] );
 159                                         }
 160                                         if (preg_match('/\\bdisabled\\b/i', $data['options'])
 161                                                 || !preg_match("/{$this->regex}/i", $data['test'])) {
 162                                                 # disabled test
 163                                                 $data = array();
 164                                                 $section = null;
 165                                                 continue;
 166                                         }
 167                                         if( $this->runTest(
 168                                                 $this->chomp( $data['test'] ),
 169                                                 $this->chomp( $data['input'] ),
 170                                                 $this->chomp( $data['result'] ),
 171                                                 $this->chomp( $data['options'] ) ) ) {
 172                                                 $success++;
 173                                         }
 174                                         $total++;
 175                                         $data = array();
 176                                         $section = null;
 177                                         continue;
 178                                 }
 179                                 if ( isset ($data[$section] ) ) {
 180                                         die ( "duplicate section '$section' at line $n\n" );
 181                                 }
 182                                 $data[$section] = '';
 183                                 continue;
 184                         }
 185                         if( $section ) {
 186                                 $data[$section] .= $line;
 187                         }
 188                 }
 189                 if( $total > 0 ) {
 190                         $ratio = IntVal( 100.0 * $success / $total );
 191                         print $this->termColor( 1 ) . "\nPassed $success of $total tests ($ratio%) ";
 192                         if( $success == $total ) {
 193                                 print $this->termColor( 32 ) . "PASSED!";
 194                         } else {
 195                                 print $this->termColor( 31 ) . "FAILED!";
 196                         }
 197                         print $this->termReset() . "\n";
 198                         return ($success == $total);
 199                 } else {
 200                         die( "No tests found.\n" );
 201                 }
 202         }
 203
 204         /**
 205          * Run a given wikitext input through a freshly-constructed wiki parser,
 206          * and compare the output against the expected results.
 207          * Prints status and explanatory messages to stdout.
 208          *
 209          * @param string $input Wikitext to try rendering
 210          * @param string $result Result to output
 211          * @return bool
 212          */
 213         function runTest( $desc, $input, $result, $opts ) {
 214                 if( !$this->quiet ) {
 215                         $this->showTesting( $desc );
 216                 }
 217
 218                 $this->setupGlobals($opts);
 219
 220                 $user =& new User();
 221                 $options =& ParserOptions::newFromUser( $user );
 222
 223                 if (preg_match('/\\bmath\\b/i', $opts)) {
 224                         # XXX this should probably be done by the ParserOptions
 225                         require_once('Math.php');
 226
 227                         $options->setUseTex(true);
 228                 }
 229
 230                 if (preg_match('/title=\[\[(.*)\]\]/', $opts, $m)) {
 231                         $titleText = $m[1];
 232                 }
 233                 else {
 234                         $titleText = 'Parser test';
 235                 }
 236
 237                 $parser =& new Parser();
 238                 $title =& Title::makeTitle( NS_MAIN, $titleText );
 239
 240                 if (preg_match('/\\bpst\\b/i', $opts)) {
 241                         $out = $parser->preSaveTransform( $input, $title, $user, $options );
 242                 } elseif (preg_match('/\\bmsg\\b/i', $opts)) {
 243                         $out = $parser->transformMsg( $input, $options );
 244                 } else {
 245                         $output =& $parser->parse( $input, $title, $options );
 246                         $out = $output->getText();
 247
 248                         if (preg_match('/\\bill\\b/i', $opts)) {
 249                                 $out = $this->tidy( implode( ' ', $output->getLanguageLinks() ) );
 250                         } else if (preg_match('/\\bcat\\b/i', $opts)) {
 251                                 $out = $this->tidy ( implode( ' ', $output->getCategoryLinks() ) );
 252                         }
 253
 254                         $result = $this->tidy($result);
 255                 }
 256
 257                 $this->teardownGlobals();
 258
 259                 if( $result === $out && $this->wellFormed( $out ) ) {
 260                         return $this->showSuccess( $desc );
 261                 } else {
 262                         return $this->showFailure( $desc, $result, $out );
 263                 }
 264         }
 265
 266         /**
 267          * Set up the global variables for a consistent environment for each test.
 268          * Ideally this should replace the global configuration entirely.
 269          *
 270          * @access private
 271          */
 272         function setupGlobals($opts = '') {
 273                 # Save the prefixed / quoted table names for later use when we make the temporaries.
 274                 $db =& wfGetDB( DB_READ );
 275                 $this->oldTableNames = array();
 276                 foreach( $this->listTables() as $table ) {
 277                         $this->oldTableNames[$table] = $db->tableName( $table );
 278                 }
 279                 if( !isset( $this->uploadDir ) ) {
 280                         $this->uploadDir = $this->setupUploadDir();
 281                 }
 282
 283                 $settings = array(
 284                         'wgServer' => 'http://localhost',
 285                         'wgScript' => '/index.php',
 286                         'wgScriptPath' => '/',
 287                         'wgArticlePath' => '/wiki/$1',
 288                         'wgUploadPath' => '/images',
 289                         'wgUploadDirectory' => $this->uploadDir,
 290                         'wgStyleSheetPath' => '/skins',
 291                         'wgSitename' => 'MediaWiki',
 292                         'wgLanguageCode' => 'en',
 293                         'wgContLanguageCode' => 'en',
 294                         'wgUseLatin1' => false,
 295                         'wgDBprefix' => 'parsertest',
 296                         'wgDefaultUserOptions' => array(),
 297
 298                         'wgLoadBalancer' => LoadBalancer::newFromParams( $GLOBALS['wgDBservers'] ),
 299                         'wgLang' => new LanguageUtf8(),
 300                         'wgContLang' => new LanguageUtf8(),
 301                         'wgNamespacesWithSubpages' => array( 0 => preg_match('/\\bsubpage\\b/i', $opts)),
 302                         'wgMaxTocLevel' => 999,
 303                         'wgCapitalLinks' => true,
 304                         'wgDefaultUserOptions' => array(),
 305                         'wgNoFollowLinks' => true,
 306                         );
 307                 $this->savedGlobals = array();
 308                 foreach( $settings as $var => $val ) {
 309                         $this->savedGlobals[$var] = $GLOBALS[$var];
 310                         $GLOBALS[$var] = $val;
 311                 }
 312                 $GLOBALS['wgLoadBalancer']->loadMasterPos();
 313                 $GLOBALS['wgMessageCache']->initialise( new BagOStuff(), false, 0, $GLOBALS['wgDBname'] );
 314                 $this->setupDatabase();
 315
 316                 global $wgUser;
 317                 $wgUser = new User();
 318         }
 319
 320         # List of temporary tables to create, without prefix
 321         # Some of these probably aren't necessary
 322         function listTables() {
 323                 return array('user', 'page', 'revision', 'text', 'links',
 324                         'brokenlinks', 'imagelinks', 'categorylinks',
 325                         'linkscc', 'site_stats', 'hitcounter',
 326                         'ipblocks', 'image', 'oldimage',
 327                         'recentchanges',
 328                         'watchlist', 'math', 'searchindex',
 329                         'interwiki', 'querycache',
 330                         'objectcache', 'group'
 331                 );
 332         }
 333
 334         /**
 335          * Set up a temporary set of wiki tables to work with for the tests.
 336          * Currently this will only be done once per run, and any changes to
 337          * the db will be visible to later tests in the run.
 338          *
 339          * @access private
 340          */
 341         function setupDatabase() {
 342                 static $setupDB = false;
 343                 global $wgDBprefix;
 344
 345                 # Make sure we don't mess with the live DB
 346                 if (!$setupDB && $wgDBprefix === 'parsertest') {
 347                         $db =& wfGetDB( DB_MASTER );
 348
 349                         $tables = $this->listTables();
 350
 351                         if (!(strcmp($db->getServerVersion(), '4.1') < 0 and stristr($db->getSoftwareLink(), 'MySQL'))) {
 352                                 # Database that supports CREATE TABLE ... LIKE
 353                                 global $wgDBtype;
 354                                 if( $wgDBtype == 'PostgreSQL' ) {
 355                                         $def = 'INCLUDING DEFAULTS';
 356                                 } else {
 357                                         $def = '';
 358                                 }
 359                                 foreach ($tables as $tbl) {
 360                                         $newTableName = $db->tableName( $tbl );
 361                                         $tableName = $this->oldTableNames[$tbl];
 362                                         $db->query("CREATE TEMPORARY TABLE $newTableName (LIKE $tableName $def)");
 363                                 }
 364                         } else {
 365                                 # Hack for MySQL versions < 4.1, which don't support
 366                                 # "CREATE TABLE ... LIKE". Note that
 367                                 # "CREATE TEMPORARY TABLE ... SELECT * FROM ... LIMIT 0"
 368                                 # would not create the indexes we need....
 369                                 foreach ($tables as $tbl) {
 370                                         $res = $db->query("SHOW CREATE TABLE {$this->oldTableNames[$tbl]}");
 371                                         $row = $db->fetchRow($res);
 372                                         $create = $row[1];
 373                                         $create_tmp = preg_replace('/CREATE TABLE `(.*?)`/', 'CREATE TEMPORARY TABLE `'
 374                                                 . $wgDBprefix . $tbl .'`', $create);
 375                                         if ($create === $create_tmp) {
 376                                                 # Couldn't do replacement
 377                                                 die("could not create temporary table $tbl");
 378                                         }
 379                                         $db->query($create_tmp);
 380                                 }
 381
 382                         }
 383
 384                         # Hack: insert a few Wikipedia in-project interwiki prefixes,
 385                         # for testing inter-language links
 386                         $db->insert( 'interwiki', array(
 387                                 array( 'iw_prefix' => 'Wikipedia',
 388                                        'iw_url'    => 'http://en.wikipedia.org/wiki/$1',
 389                                        'iw_local'  => 0 ),
 390                                 array( 'iw_prefix' => 'MeatBall',
 391                                        'iw_url'    => 'http://www.usemod.com/cgi-bin/mb.pl?$1',
 392                                        'iw_local'  => 0 ),
 393                                 array( 'iw_prefix' => 'zh',
 394                                        'iw_url'    => 'http://zh.wikipedia.org/wiki/$1',
 395                                        'iw_local'  => 1 ),
 396                                 array( 'iw_prefix' => 'es',
 397                                        'iw_url'    => 'http://es.wikipedia.org/wiki/$1',
 398                                        'iw_local'  => 1 ),
 399                                 array( 'iw_prefix' => 'fr',
 400                                        'iw_url'    => 'http://fr.wikipedia.org/wiki/$1',
 401                                        'iw_local'  => 1 ),
 402                                 array( 'iw_prefix' => 'ru',
 403                                        'iw_url'    => 'http://ru.wikipedia.org/wiki/$1',
 404                                        'iw_local'  => 1 ),
 405                                 ) );
 406
 407                         # Hack: initialize a group
 408                         $db->insert( 'group', array(
 409                                 'group_id' => 1,
 410                                 'group_name' => 'Anonymous',
 411                                 'group_description' => 'Anonymous users',
 412                                 'group_rights' => 'read' ) );
 413
 414                         $setupDB = true;
 415                 }
 416         }
 417
 418         /**
 419          * Create a dummy uploads directory which will contain a couple
 420          * of files in order to pass existence tests.
 421          * @return string The directory
 422          * @access private
 423          */
 424         function setupUploadDir() {
 425                 $dir = "/tmp/mwParser-" . mt_rand() . "-images";
 426                 mkdir( $dir );
 427                 mkdir( $dir . '/3' );
 428                 mkdir( $dir . '/3/3a' );
 429                 $f = fopen( $dir . '/3/3a/Foobar.jpg', 'wb' );
 430                 fwrite( $f, 'Dummy file' );
 431                 fclose( $f );
 432                 return $dir;
 433         }
 434
 435         /**
 436          * Restore default values and perform any necessary clean-up
 437          * after each test runs.
 438          *
 439          * @access private
 440          */
 441         function teardownGlobals() {
 442                 foreach( $this->savedGlobals as $var => $val ) {
 443                         $GLOBALS[$var] = $val;
 444                 }
 445                 if( isset( $this->uploadDir ) ) {
 446                         $this->teardownUploadDir( $this->uploadDir );
 447                         unset( $this->uploadDir );
 448                 }
 449         }
 450
 451         /**
 452          * Remove the dummy uploads directory
 453          * @access private
 454          */
 455         function teardownUploadDir( $dir ) {
 456                 unlink( "$dir/3/3a/Foobar.jpg" );
 457                 rmdir( "$dir/3/3a" );
 458                 rmdir( "$dir/3" );
 459                 @rmdir( "$dir/thumb/3/39" );
 460                 @rmdir( "$dir/thumb/3" );
 461                 @rmdir( "$dir/thumb" );
 462                 rmdir( "$dir" );
 463         }
 464
 465         /**
 466          * "Running test $desc..."
 467          * @access private
 468          */
 469         function showTesting( $desc ) {
 470                 print "Running test $desc... ";
 471         }
 472
 473         /**
 474          * Print a happy success message.
 475          *
 476          * @param string $desc The test name
 477          * @return bool
 478          * @access private
 479          */
 480         function showSuccess( $desc ) {
 481                 if( !$this->quiet ) {
 482                         print $this->termColor( '1;32' ) . 'PASSED' . $this->termReset() . "\n";
 483                 }
 484                 return true;
 485         }
 486
 487         /**
 488          * Print a failure message and provide some explanatory output
 489          * about what went wrong if so configured.
 490          *
 491          * @param string $desc The test name
 492          * @param string $result Expected HTML output
 493          * @param string $html Actual HTML output
 494          * @return bool
 495          * @access private
 496          */
 497         function showFailure( $desc, $result, $html ) {
 498                 if( $this->quiet ) {
 499                         # In quiet mode we didn't show the 'Testing' message before the
 500                         # test, in case it succeeded. Show it now:
 501                         $this->showTesting( $desc );
 502                 }
 503                 print $this->termColor( '1;31' ) . 'FAILED!' . $this->termReset() . "\n";
 504                 if( $this->showDiffs ) {
 505                         print $this->quickDiff( $result, $html );
 506                 }
 507                 if( !$this->wellFormed( $html ) ) {
 508                         print "XML error: $this->mXmlError\n";
 509                 }
 510                 return false;
 511         }
 512
 513         /**
 514          * Run given strings through a diff and return the (colorized) output.
 515          * Requires writable /tmp directory and a 'diff' command in the PATH.
 516          *
 517          * @param string $input
 518          * @param string $output
 519          * @return string
 520          * @access private
 521          */
 522         function quickDiff( $input, $output ) {
 523                 $prefix = "/tmp/mwParser-" . mt_rand();
 524
 525                 $infile = "$prefix-expected";
 526                 $this->dumpToFile( $input, $infile );
 527
 528                 $outfile = "$prefix-actual";
 529                 $this->dumpToFile( $output, $outfile );
 530
 531                 $diff = `diff -au $infile $outfile`;
 532                 unlink( $infile );
 533                 unlink( $outfile );
 534
 535                 return $this->colorDiff( $diff );
 536         }
 537
 538         /**
 539          * Write the given string to a file, adding a final newline.
 540          *
 541          * @param string $data
 542          * @param string $filename
 543          * @access private
 544          */
 545         function dumpToFile( $data, $filename ) {
 546                 $file = fopen( $filename, "wt" );
 547                 fwrite( $file, $data . "\n" );
 548                 fclose( $file );
 549         }
 550
 551         /**
 552          * Return ANSI terminal escape code for changing text attribs/color,
 553          * or empty string if color output is disabled.
 554          *
 555          * @param string $color Semicolon-separated list of attribute/color codes
 556          * @return string
 557          * @access private
 558          */
 559         function termColor( $color ) {
 560                 if($this->lightcolor) {
 561                         return $this->color ? "\x1b[1;{$color}m" : '';
 562                 } else {
 563                         return $this->color ? "\x1b[{$color}m" : '';
 564                 }
 565         }
 566
 567         /**
 568          * Return ANSI terminal escape code for restoring default text attributes,
 569          * or empty string if color output is disabled.
 570          *
 571          * @return string
 572          * @access private
 573          */
 574         function termReset() {
 575                 return $this->color ? "\x1b[0m" : '';
 576         }
 577
 578         /**
 579          * Colorize unified diff output if set for ANSI color output.
 580          * Subtractions are colored blue, additions red.
 581          *
 582          * @param string $text
 583          * @return string
 584          * @access private
 585          */
 586         function colorDiff( $text ) {
 587                 return preg_replace(
 588                         array( '/^(-.*)$/m', '/^(\+.*)$/m' ),
 589                         array( $this->termColor( 34 ) . '$1' . $this->termReset(),
 590                                $this->termColor( 31 ) . '$1' . $this->termReset() ),
 591                         $text );
 592         }
 593
 594         /**
 595          * Insert a temporary test article
 596          * @param string $name the title, including any prefix
 597          * @param string $text the article text
 598          * @param int $line the input line number, for reporting errors
 599          * @static
 600          * @access private
 601          */
 602         function addArticle($name, $text, $line) {
 603                 $this->setupGlobals();
 604                 $title = Title::newFromText( $name );
 605                 if ( is_null($title) ) {
 606                         die( "invalid title at line $line\n" );
 607                 }
 608
 609                 $aid = $title->getArticleID( GAID_FOR_UPDATE );
 610                 if ($aid != 0) {
 611                         die( "duplicate article at line $line\n" );
 612                 }
 613
 614                 $art = new Article($title);
 615                 $art->insertNewArticle($text, '', false, false );
 616                 $this->teardownGlobals();
 617         }
 618
 619         /*
 620          * Run the "tidy" command on text if the $wgUseTidy
 621          * global is true
 622          *
 623          * @param string $text the text to tidy
 624          * @return string
 625          * @static
 626          * @access private
 627          */
 628         function tidy( $text ) {
 629                 global $wgUseTidy;
 630                 if ($wgUseTidy) {
 631                         $text = Parser::tidy($text);
 632                 }
 633                 return $text;
 634         }
 635
 636         function wellFormed( $text ) {
 637                 $html =
 638                         '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ' .
 639                         '"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">' .
 640                         '<html>' .
 641                         $text .
 642                         '</html>';
 643
 644                 $parser = xml_parser_create( "UTF-8" );
 645
 646                 # case folding violates XML standard, turn it off
 647                 xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
 648
 649                 if( !xml_parse( $parser, $html, true ) ) {
 650                         $err = xml_error_string( xml_get_error_code( $parser ) );
 651                         $position = xml_get_current_byte_index( $parser );
 652                         $fragment = $this->extractFragment( $html, $position );
 653                         $this->mXmlError = "$err at byte $position:\n$fragment";
 654                         xml_parser_free( $parser );
 655                         return false;
 656                 }
 657                 xml_parser_free( $parser );
 658                 return true;
 659         }
 660
 661         function extractFragment( $text, $position ) {
 662                 $start = max( 0, $position - 10 );
 663                 $before = $position - $start;
 664                 $fragment = '...' .
 665                         $this->termColor( 34 ) .
 666                         substr( $text, $start, $before ) .
 667                         $this->termColor( 0 ) .
 668                         $this->termColor( 31 ) .
 669                         $this->termColor( 1 ) .
 670                         substr( $text, $position, 1 ) .
 671                         $this->termColor( 0 ) .
 672                         $this->termColor( 34 ) .
 673                         substr( $text, $position + 1, 9 ) .
 674                         $this->termColor( 0 ) .
 675                         '...';
 676                 $display = str_replace( "\n", ' ', $fragment );
 677                 $caret = '   ' .
 678                         str_repeat( ' ', $before ) .
 679                         $this->termColor( 31 ) .
 680                         '^' .
 681                         $this->termColor( 0 );
 682                 return "$display\n$caret";
 683         }
 684
 685 }
 686
 687 if( isset( $options['help'] ) ) {
 688         echo <<<END
 689 MediaWiki $wgVersion parser test suite
 690 Usage: php parserTests.php [--quick] [--quiet] [--color[=(yes|no|light)]]
 691                            [--regex <expression>] [--help]
 692 Options:
 693   --quick  Suppress diff output of failed tests
 694   --quiet  Suppress notification of passed tests (shows only failed tests)
 695   --color  Override terminal detection and force color output on or off
 696            'light' option is similar to 'yes' but with color for dark backgrounds
 697   --regex  Only run tests whose descriptions which match given regex
 698   --help   Show this help message
 699
 700
 701 END;
 702         exit( 0 );
 703 }
 704
 705 # There is a convention that the parser should never
 706 # refer to $wgTitle directly, but instead use the title
 707 # passed to it.
 708 $wgTitle = Title::newFromText( 'Parser test script do not use' );
 709 $tester =& new ParserTest();
 710
 711 # Note: the command line setup changes the current working directory
 712 # to the parent, which is why we have to put the subdir here:
 713 $ok = $tester->runTestsFromFile( 'maintenance/parserTests.txt' );
 714
 715 exit ($ok ? 0 : -1);
 716
 717 ?>