maintenance/parserTests.inc

   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 # 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  * @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( "$IP/includes/BagOStuff.php" );
  34 require_once( "$IP/languages/LanguageUtf8.php" );
  35 require_once( "$IP/includes/Hooks.php" );
  36 require_once( "$IP/maintenance/parserTestsParserHook.php" );
  37 require_once( "$IP/maintenance/parserTestsStaticParserHook.php" );
  38 require_once( "$IP/maintenance/parserTestsParserTime.php" );
  39
  40 /**
  41  * @package MediaWiki
  42  * @subpackage Maintenance
  43  */
  44 class ParserTest {
  45         /**
  46          * boolean $color whereas output should be colorized
  47          * @private
  48          */
  49         var $color;
  50
  51         /**
  52          * boolean $lightcolor whereas output should use light colors
  53          * @private
  54          */
  55         var $lightcolor;
  56
  57         /**
  58          * Sets terminal colorization and diff/quick modes depending on OS and
  59          * command-line options (--color and --quick).
  60          *
  61          * @public
  62          */
  63         function ParserTest() {
  64                 global $options;
  65
  66                 # Only colorize output if stdout is a terminal.
  67                 $this->lightcolor = false;
  68                 $this->color = !wfIsWindows() && posix_isatty(1);
  69
  70                 if( isset( $options['color'] ) ) {
  71                         switch( $options['color'] ) {
  72                         case 'no':
  73                                 $this->color = false;
  74                                 break;
  75                         case 'light':
  76                                 $this->lightcolor = true;
  77                                 # Fall through
  78                         case 'yes':
  79                         default:
  80                                 $this->color = true;
  81                                 break;
  82                         }
  83                 }
  84
  85                 $this->showDiffs = !isset( $options['quick'] );
  86
  87                 $this->quiet = isset( $options['quiet'] );
  88
  89                 if (isset($options['regex'])) {
  90                         $this->regex = $options['regex'];
  91                 } else {
  92                         # Matches anything
  93                         $this->regex = '';
  94                 }
  95
  96                 $this->hooks = array();
  97         }
  98
  99         /**
 100          * Remove last character if it is a newline
 101          * @private
 102          */
 103         function chomp($s) {
 104                 if (substr($s, -1) === "\n") {
 105                         return substr($s, 0, -1);
 106                 }
 107                 else {
 108                         return $s;
 109                 }
 110         }
 111
 112         /**
 113          * Run a series of tests listed in the given text file.
 114          * Each test consists of a brief description, wikitext input,
 115          * and the expected HTML output.
 116          *
 117          * Prints status updates on stdout and counts up the total
 118          * number and percentage of passed tests.
 119          *
 120          * @param string $filename
 121          * @return bool True if passed all tests, false if any tests failed.
 122          * @public
 123          */
 124         function runTestsFromFile( $filename ) {
 125                 $infile = fopen( $filename, 'rt' );
 126                 if( !$infile ) {
 127                         wfDie( "Couldn't open $filename\n" );
 128                 }
 129
 130                 $data = array();
 131                 $section = null;
 132                 $success = 0;
 133                 $total = 0;
 134                 $n = 0;
 135                 while( false !== ($line = fgets( $infile ) ) ) {
 136                         $n++;
 137                         if( preg_match( '/^!!\s*(\w+)/', $line, $matches ) ) {
 138                                 $section = strtolower( $matches[1] );
 139                                 if( $section == 'endarticle') {
 140                                         if( !isset( $data['text'] ) ) {
 141                                                 wfDie( "'endarticle' without 'text' at line $n\n" );
 142                                         }
 143                                         if( !isset( $data['article'] ) ) {
 144                                                 wfDie( "'endarticle' without 'article' at line $n\n" );
 145                                         }
 146                                         $this->addArticle($this->chomp($data['article']), $this->chomp($data['text']), $n);
 147                                         $data = array();
 148                                         $section = null;
 149                                         continue;
 150                                 }
 151                                 if( $section == 'endhooks' ) {
 152                                         if( !isset( $data['hooks'] ) ) {
 153                                                 wfDie( "'endhooks' without 'hooks' at line $n\n" );
 154                                         }
 155                                         foreach( explode( "\n", $data['hooks'] ) as $line ) {
 156                                                 $line = trim( $line );
 157                                                 if( $line ) {
 158                                                         $this->requireHook( $line );
 159                                                 }
 160                                         }
 161                                         $data = array();
 162                                         $section = null;
 163                                         continue;
 164                                 }
 165                                 if( $section == 'end' ) {
 166                                         if( !isset( $data['test'] ) ) {
 167                                                 wfDie( "'end' without 'test' at line $n\n" );
 168                                         }
 169                                         if( !isset( $data['input'] ) ) {
 170                                                 wfDie( "'end' without 'input' at line $n\n" );
 171                                         }
 172                                         if( !isset( $data['result'] ) ) {
 173                                                 wfDie( "'end' without 'result' at line $n\n" );
 174                                         }
 175                                         if( !isset( $data['options'] ) ) {
 176                                                 $data['options'] = '';
 177                                         }
 178                                         else {
 179                                                 $data['options'] = $this->chomp( $data['options'] );
 180                                         }
 181                                         if (preg_match('/\\bdisabled\\b/i', $data['options'])
 182                                                 || !preg_match("/{$this->regex}/i", $data['test'])) {
 183                                                 # disabled test
 184                                                 $data = array();
 185                                                 $section = null;
 186                                                 continue;
 187                                         }
 188                                         if( $this->runTest(
 189                                                 $this->chomp( $data['test'] ),
 190                                                 $this->chomp( $data['input'] ),
 191                                                 $this->chomp( $data['result'] ),
 192                                                 $this->chomp( $data['options'] ) ) ) {
 193                                                 $success++;
 194                                         }
 195                                         $total++;
 196                                         $data = array();
 197                                         $section = null;
 198                                         continue;
 199                                 }
 200                                 if ( isset ($data[$section] ) ) {
 201                                         wfDie( "duplicate section '$section' at line $n\n" );
 202                                 }
 203                                 $data[$section] = '';
 204                                 continue;
 205                         }
 206                         if( $section ) {
 207                                 $data[$section] .= $line;
 208                         }
 209                 }
 210                 if( $total > 0 ) {
 211                         $ratio = wfPercent( 100 * $success / $total );
 212                         print $this->termColor( 1 ) . "\nPassed $success of $total tests ($ratio) ";
 213                         if( $success == $total ) {
 214                                 print $this->termColor( 32 ) . "PASSED!";
 215                         } else {
 216                                 print $this->termColor( 31 ) . "FAILED!";
 217                         }
 218                         print $this->termReset() . "\n";
 219                         return ($success == $total);
 220                 } else {
 221                         wfDie( "No tests found.\n" );
 222                 }
 223         }
 224
 225         /**
 226          * Run a given wikitext input through a freshly-constructed wiki parser,
 227          * and compare the output against the expected results.
 228          * Prints status and explanatory messages to stdout.
 229          *
 230          * @param string $input Wikitext to try rendering
 231          * @param string $result Result to output
 232          * @return bool
 233          */
 234         function runTest( $desc, $input, $result, $opts ) {
 235                 if( !$this->quiet ) {
 236                         $this->showTesting( $desc );
 237                 }
 238
 239                 $this->setupGlobals($opts);
 240
 241                 $user =& new User();
 242                 $options = ParserOptions::newFromUser( $user );
 243
 244                 if (preg_match('/\\bmath\\b/i', $opts)) {
 245                         # XXX this should probably be done by the ParserOptions
 246                         $options->setUseTex(true);
 247                 }
 248
 249                 if (preg_match('/title=\[\[(.*)\]\]/', $opts, $m)) {
 250                         $titleText = $m[1];
 251                 }
 252                 else {
 253                         $titleText = 'Parser test';
 254                 }
 255
 256                 $noxml = (bool)preg_match( '~\\b noxml \\b~x', $opts );
 257
 258                 $parser =& new Parser();
 259                 foreach( $this->hooks as $tag => $callback ) {
 260                         $parser->setHook( $tag, $callback );
 261                 }
 262                 wfRunHooks( 'ParserTestParser', array( &$parser ) );
 263
 264                 $title =& Title::makeTitle( NS_MAIN, $titleText );
 265
 266                 if (preg_match('/\\bpst\\b/i', $opts)) {
 267                         $out = $parser->preSaveTransform( $input, $title, $user, $options );
 268                 } elseif (preg_match('/\\bmsg\\b/i', $opts)) {
 269                         $out = $parser->transformMsg( $input, $options );
 270                 } elseif( preg_match( '/\\bsection=(\d+)\b/i', $opts, $matches ) ) {
 271                         $section = intval( $matches[1] );
 272                         $out = $parser->getSection( $input, $section );
 273                 } elseif( preg_match( '/\\breplace=(\d+),"(.*?)"/i', $opts, $matches ) ) {
 274                         $section = intval( $matches[1] );
 275                         $replace = $matches[2];
 276                         $out = $parser->replaceSection( $input, $section, $replace );
 277                 } else {
 278                         $output = $parser->parse( $input, $title, $options, true, true, 1337 );
 279                         $out = $output->getText();
 280
 281                         if (preg_match('/\\bill\\b/i', $opts)) {
 282                                 $out = $this->tidy( implode( ' ', $output->getLanguageLinks() ) );
 283                         } else if (preg_match('/\\bcat\\b/i', $opts)) {
 284                                 global $wgOut;
 285                                 $wgOut->addCategoryLinks($output->getCategories());
 286                                 $out = $this->tidy ( implode( ' ', $wgOut->getCategoryLinks() ) );
 287                         }
 288
 289                         $result = $this->tidy($result);
 290                 }
 291
 292                 $this->teardownGlobals();
 293
 294                 if( $result === $out && ( $noxml === true || $this->wellFormed( $out ) ) ) {
 295                         return $this->showSuccess( $desc );
 296                 } else {
 297                         return $this->showFailure( $desc, $result, $out );
 298                 }
 299         }
 300
 301         /**
 302          * Set up the global variables for a consistent environment for each test.
 303          * Ideally this should replace the global configuration entirely.
 304          *
 305          * @private
 306          */
 307         function setupGlobals($opts = '') {
 308                 # Save the prefixed / quoted table names for later use when we make the temporaries.
 309                 $db =& wfGetDB( DB_READ );
 310                 $this->oldTableNames = array();
 311                 foreach( $this->listTables() as $table ) {
 312                         $this->oldTableNames[$table] = $db->tableName( $table );
 313                 }
 314                 if( !isset( $this->uploadDir ) ) {
 315                         $this->uploadDir = $this->setupUploadDir();
 316                 }
 317
 318                 if( preg_match( '/language=([a-z]+(?:_[a-z]+)?)/', $opts, $m ) ) {
 319                         $lang = $m[1];
 320                 } else {
 321                         $lang = 'en';
 322                 }
 323                 $langClass = 'Language' . str_replace( '-', '_', ucfirst( $lang ) );
 324                 $langObj = setupLangObj( $langClass );
 325
 326                 $settings = array(
 327                         'wgServer' => 'http://localhost',
 328                         'wgScript' => '/index.php',
 329                         'wgScriptPath' => '/',
 330                         'wgArticlePath' => '/wiki/$1',
 331                         'wgActionPaths' => array(),
 332                         'wgUploadPath' => 'http://example.com/images',
 333                         'wgUploadDirectory' => $this->uploadDir,
 334                         'wgStyleSheetPath' => '/skins',
 335                         'wgSitename' => 'MediaWiki',
 336                         'wgServerName' => 'Britney Spears',
 337                         'wgLanguageCode' => $lang,
 338                         'wgContLanguageCode' => $lang,
 339                         'wgDBprefix' => 'parsertest_',
 340                         'wgDefaultUserOptions' => array(),
 341
 342                         'wgLang' => $langObj,
 343                         'wgContLang' => $langObj,
 344                         'wgNamespacesWithSubpages' => array( 0 => preg_match('/\\bsubpage\\b/i', $opts)),
 345                         'wgMaxTocLevel' => 999,
 346                         'wgCapitalLinks' => true,
 347                         'wgDefaultUserOptions' => array(),
 348                         'wgNoFollowLinks' => true,
 349                         'wgThumbnailScriptPath' => false,
 350                         'wgUseTeX' => false,
 351                         'wgLocaltimezone' => 'UTC',
 352                         );
 353                 $this->savedGlobals = array();
 354                 foreach( $settings as $var => $val ) {
 355                         $this->savedGlobals[$var] = $GLOBALS[$var];
 356                         $GLOBALS[$var] = $val;
 357                 }
 358                 $GLOBALS['wgLoadBalancer']->loadMasterPos();
 359                 $GLOBALS['wgMessageCache']->initialise( new BagOStuff(), false, 0, $GLOBALS['wgDBname'] );
 360                 $this->setupDatabase();
 361
 362                 global $wgUser;
 363                 $wgUser = new User();
 364         }
 365
 366         # List of temporary tables to create, without prefix
 367         # Some of these probably aren't necessary
 368         function listTables() {
 369                 $tables = array('user', 'page', 'revision', 'text',
 370                         'pagelinks', 'imagelinks', 'categorylinks',
 371                         'templatelinks', 'externallinks', 'langlinks',
 372                         'site_stats', 'hitcounter',
 373                         'ipblocks', 'image', 'oldimage',
 374                         'recentchanges',
 375                         'watchlist', 'math', 'searchindex',
 376                         'interwiki', 'querycache',
 377                         'objectcache', 'job'
 378                 );
 379
 380                 // FIXME manually adding additional table for the tasks extension
 381                 // we probably need a better software wide system to register new
 382                 // tables.
 383                 global $wgExtensionFunctions;
 384                 if( in_array('wfTasksExtension' , $wgExtensionFunctions ) ) {
 385                         $tables[] = 'tasks';
 386                 }
 387
 388                 return $tables;
 389         }
 390
 391         /**
 392          * Set up a temporary set of wiki tables to work with for the tests.
 393          * Currently this will only be done once per run, and any changes to
 394          * the db will be visible to later tests in the run.
 395          *
 396          * @private
 397          */
 398         function setupDatabase() {
 399                 static $setupDB = false;
 400                 global $wgDBprefix;
 401
 402                 # Make sure we don't mess with the live DB
 403                 if (!$setupDB && $wgDBprefix === 'parsertest_') {
 404                         # oh teh horror
 405                         $GLOBALS['wgLoadBalancer'] = LoadBalancer::newFromParams( $GLOBALS['wgDBservers'] );
 406                         $db =& wfGetDB( DB_MASTER );
 407
 408                         $tables = $this->listTables();
 409
 410                         if (!(strcmp($db->getServerVersion(), '4.1') < 0 and stristr($db->getSoftwareLink(), 'MySQL'))) {
 411                                 # Database that supports CREATE TABLE ... LIKE
 412                                 global $wgDBtype;
 413                                 if( $wgDBtype == 'PostgreSQL' ) {
 414                                         $def = 'INCLUDING DEFAULTS';
 415                                 } else {
 416                                         $def = '';
 417                                 }
 418                                 foreach ($tables as $tbl) {
 419                                         $newTableName = $db->tableName( $tbl );
 420                                         $tableName = $this->oldTableNames[$tbl];
 421                                         $db->query("CREATE TEMPORARY TABLE $newTableName (LIKE $tableName $def)");
 422                                 }
 423                         } else {
 424                                 # Hack for MySQL versions < 4.1, which don't support
 425                                 # "CREATE TABLE ... LIKE". Note that
 426                                 # "CREATE TEMPORARY TABLE ... SELECT * FROM ... LIMIT 0"
 427                                 # would not create the indexes we need....
 428                                 foreach ($tables as $tbl) {
 429                                         $res = $db->query("SHOW CREATE TABLE {$this->oldTableNames[$tbl]}");
 430                                         $row = $db->fetchRow($res);
 431                                         $create = $row[1];
 432                                         $create_tmp = preg_replace('/CREATE TABLE `(.*?)`/', 'CREATE TEMPORARY TABLE `'
 433                                                 . $wgDBprefix . $tbl .'`', $create);
 434                                         if ($create === $create_tmp) {
 435                                                 # Couldn't do replacement
 436                                                 wfDie("could not create temporary table $tbl");
 437                                         }
 438                                         $db->query($create_tmp);
 439                                 }
 440
 441                         }
 442
 443                         # Hack: insert a few Wikipedia in-project interwiki prefixes,
 444                         # for testing inter-language links
 445                         $db->insert( 'interwiki', array(
 446                                 array( 'iw_prefix' => 'Wikipedia',
 447                                        'iw_url'    => 'http://en.wikipedia.org/wiki/$1',
 448                                        'iw_local'  => 0 ),
 449                                 array( 'iw_prefix' => 'MeatBall',
 450                                        'iw_url'    => 'http://www.usemod.com/cgi-bin/mb.pl?$1',
 451                                        'iw_local'  => 0 ),
 452                                 array( 'iw_prefix' => 'zh',
 453                                        'iw_url'    => 'http://zh.wikipedia.org/wiki/$1',
 454                                        'iw_local'  => 1 ),
 455                                 array( 'iw_prefix' => 'es',
 456                                        'iw_url'    => 'http://es.wikipedia.org/wiki/$1',
 457                                        'iw_local'  => 1 ),
 458                                 array( 'iw_prefix' => 'fr',
 459                                        'iw_url'    => 'http://fr.wikipedia.org/wiki/$1',
 460                                        'iw_local'  => 1 ),
 461                                 array( 'iw_prefix' => 'ru',
 462                                        'iw_url'    => 'http://ru.wikipedia.org/wiki/$1',
 463                                        'iw_local'  => 1 ),
 464                                 ) );
 465
 466                         # Hack: Insert an image to work with
 467                         $db->insert( 'image', array(
 468                                 'img_name'        => 'Foobar.jpg',
 469                                 'img_size'        => 12345,
 470                                 'img_description' => 'Some lame file',
 471                                 'img_user'        => 1,
 472                                 'img_user_text'   => 'WikiSysop',
 473                                 'img_timestamp'   => $db->timestamp( '20010115123500' ),
 474                                 'img_width'       => 1941,
 475                                 'img_height'      => 220,
 476                                 'img_bits'        => 24,
 477                                 'img_media_type'  => MEDIATYPE_BITMAP,
 478                                 'img_major_mime'  => "image",
 479                                 'img_minor_mime'  => "jpeg",
 480                                 ) );
 481
 482                         # Update certain things in site_stats
 483                         $db->insert( 'site_stats', array( 'ss_row_id' => 1, 'ss_images' => 1, 'ss_good_articles' => 1 ) );
 484
 485                         $setupDB = true;
 486                 }
 487         }
 488
 489         /**
 490          * Create a dummy uploads directory which will contain a couple
 491          * of files in order to pass existence tests.
 492          * @return string The directory
 493          * @private
 494          */
 495         function setupUploadDir() {
 496                 global $IP;
 497
 498                 $dir = wfTempDir() . "/mwParser-" . mt_rand() . "-images";
 499                 mkdir( $dir );
 500                 mkdir( $dir . '/3' );
 501                 mkdir( $dir . '/3/3a' );
 502
 503                 $img = "$IP/skins/monobook/headbg.jpg";
 504                 $h = fopen($img, 'r');
 505                 $c = fread($h, filesize($img));
 506                 fclose($h);
 507
 508                 $f = fopen( $dir . '/3/3a/Foobar.jpg', 'wb' );
 509                 fwrite( $f, $c );
 510                 fclose( $f );
 511                 return $dir;
 512         }
 513
 514         /**
 515          * Restore default values and perform any necessary clean-up
 516          * after each test runs.
 517          *
 518          * @private
 519          */
 520         function teardownGlobals() {
 521                 foreach( $this->savedGlobals as $var => $val ) {
 522                         $GLOBALS[$var] = $val;
 523                 }
 524                 if( isset( $this->uploadDir ) ) {
 525                         $this->teardownUploadDir( $this->uploadDir );
 526                         unset( $this->uploadDir );
 527                 }
 528         }
 529
 530         /**
 531          * Remove the dummy uploads directory
 532          * @private
 533          */
 534         function teardownUploadDir( $dir ) {
 535                 unlink( "$dir/3/3a/Foobar.jpg" );
 536                 rmdir( "$dir/3/3a" );
 537                 rmdir( "$dir/3" );
 538                 @rmdir( "$dir/thumb/6/65" );
 539                 @rmdir( "$dir/thumb/6" );
 540
 541                 @unlink( "$dir/thumb/3/3a/Foobar.jpg/180px-Foobar.jpg" );
 542                 @rmdir( "$dir/thumb/3/3a/Foobar.jpg" );
 543                 @rmdir( "$dir/thumb/3/3a" );
 544                 @rmdir( "$dir/thumb/3/39" ); # wtf?
 545                 @rmdir( "$dir/thumb/3" );
 546                 @rmdir( "$dir/thumb" );
 547                 @rmdir( "$dir" );
 548         }
 549
 550         /**
 551          * "Running test $desc..."
 552          * @private
 553          */
 554         function showTesting( $desc ) {
 555                 print "Running test $desc... ";
 556         }
 557
 558         /**
 559          * Print a happy success message.
 560          *
 561          * @param string $desc The test name
 562          * @return bool
 563          * @private
 564          */
 565         function showSuccess( $desc ) {
 566                 if( !$this->quiet ) {
 567                         print $this->termColor( '1;32' ) . 'PASSED' . $this->termReset() . "\n";
 568                 }
 569                 return true;
 570         }
 571
 572         /**
 573          * Print a failure message and provide some explanatory output
 574          * about what went wrong if so configured.
 575          *
 576          * @param string $desc The test name
 577          * @param string $result Expected HTML output
 578          * @param string $html Actual HTML output
 579          * @return bool
 580          * @private
 581          */
 582         function showFailure( $desc, $result, $html ) {
 583                 if( $this->quiet ) {
 584                         # In quiet mode we didn't show the 'Testing' message before the
 585                         # test, in case it succeeded. Show it now:
 586                         $this->showTesting( $desc );
 587                 }
 588                 print $this->termColor( '1;31' ) . 'FAILED!' . $this->termReset() . "\n";
 589                 if( $this->showDiffs ) {
 590                         print $this->quickDiff( $result, $html );
 591                         if( !$this->wellFormed( $html ) ) {
 592                                 print "XML error: $this->mXmlError\n";
 593                         }
 594                 }
 595                 return false;
 596         }
 597
 598         /**
 599          * Run given strings through a diff and return the (colorized) output.
 600          * Requires writable /tmp directory and a 'diff' command in the PATH.
 601          *
 602          * @param string $input
 603          * @param string $output
 604          * @param string $inFileTail Tailing for the input file name
 605          * @param string $outFileTail Tailing for the output file name
 606          * @return string
 607          * @private
 608          */
 609         function quickDiff( $input, $output, $inFileTail='expected', $outFileTail='actual' ) {
 610                 $prefix = wfTempDir() . "/mwParser-" . mt_rand();
 611
 612                 $infile = "$prefix-$inFileTail";
 613                 $this->dumpToFile( $input, $infile );
 614
 615                 $outfile = "$prefix-$outFileTail";
 616                 $this->dumpToFile( $output, $outfile );
 617
 618                 $diff = `diff -au $infile $outfile`;
 619                 unlink( $infile );
 620                 unlink( $outfile );
 621
 622                 return $this->colorDiff( $diff );
 623         }
 624
 625         /**
 626          * Write the given string to a file, adding a final newline.
 627          *
 628          * @param string $data
 629          * @param string $filename
 630          * @private
 631          */
 632         function dumpToFile( $data, $filename ) {
 633                 $file = fopen( $filename, "wt" );
 634                 fwrite( $file, $data . "\n" );
 635                 fclose( $file );
 636         }
 637
 638         /**
 639          * Return ANSI terminal escape code for changing text attribs/color,
 640          * or empty string if color output is disabled.
 641          *
 642          * @param string $color Semicolon-separated list of attribute/color codes
 643          * @return string
 644          * @private
 645          */
 646         function termColor( $color ) {
 647                 if($this->lightcolor) {
 648                         return $this->color ? "\x1b[1;{$color}m" : '';
 649                 } else {
 650                         return $this->color ? "\x1b[{$color}m" : '';
 651                 }
 652         }
 653
 654         /**
 655          * Return ANSI terminal escape code for restoring default text attributes,
 656          * or empty string if color output is disabled.
 657          *
 658          * @return string
 659          * @private
 660          */
 661         function termReset() {
 662                 return $this->color ? "\x1b[0m" : '';
 663         }
 664
 665         /**
 666          * Colorize unified diff output if set for ANSI color output.
 667          * Subtractions are colored blue, additions red.
 668          *
 669          * @param string $text
 670          * @return string
 671          * @private
 672          */
 673         function colorDiff( $text ) {
 674                 return preg_replace(
 675                         array( '/^(-.*)$/m', '/^(\+.*)$/m' ),
 676                         array( $this->termColor( 34 ) . '$1' . $this->termReset(),
 677                                $this->termColor( 31 ) . '$1' . $this->termReset() ),
 678                         $text );
 679         }
 680
 681         /**
 682          * Insert a temporary test article
 683          * @param string $name the title, including any prefix
 684          * @param string $text the article text
 685          * @param int $line the input line number, for reporting errors
 686          * @private
 687          */
 688         function addArticle($name, $text, $line) {
 689                 $this->setupGlobals();
 690                 $title = Title::newFromText( $name );
 691                 if ( is_null($title) ) {
 692                         wfDie( "invalid title at line $line\n" );
 693                 }
 694
 695                 $aid = $title->getArticleID( GAID_FOR_UPDATE );
 696                 if ($aid != 0) {
 697                         wfDie( "duplicate article at line $line\n" );
 698                 }
 699
 700                 $art = new Article($title);
 701                 $art->insertNewArticle($text, '', false, false );
 702                 $this->teardownGlobals();
 703         }
 704
 705         /**
 706          * Steal a callback function from the primary parser, save it for
 707          * application to our scary parser. If the hook is not installed,
 708          * die a painful dead to warn the others.
 709          * @param string $name
 710          */
 711         private function requireHook( $name ) {
 712                 global $wgParser;
 713                 if( isset( $wgParser->mTagHooks[$name] ) ) {
 714                         $this->hooks[$name] = $wgParser->mTagHooks[$name];
 715                 } else {
 716                         wfDie( "This test suite requires the '$name' hook extension.\n" );
 717                 }
 718         }
 719
 720         /*
 721          * Run the "tidy" command on text if the $wgUseTidy
 722          * global is true
 723          *
 724          * @param string $text the text to tidy
 725          * @return string
 726          * @static
 727          * @private
 728          */
 729         function tidy( $text ) {
 730                 global $wgUseTidy;
 731                 if ($wgUseTidy) {
 732                         $text = Parser::tidy($text);
 733                 }
 734                 return $text;
 735         }
 736
 737         function wellFormed( $text ) {
 738                 $html =
 739                         Sanitizer::hackDocType() .
 740                         '<html>' .
 741                         $text .
 742                         '</html>';
 743
 744                 $parser = xml_parser_create( "UTF-8" );
 745
 746                 # case folding violates XML standard, turn it off
 747                 xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
 748
 749                 if( !xml_parse( $parser, $html, true ) ) {
 750                         $err = xml_error_string( xml_get_error_code( $parser ) );
 751                         $position = xml_get_current_byte_index( $parser );
 752                         $fragment = $this->extractFragment( $html, $position );
 753                         $this->mXmlError = "$err at byte $position:\n$fragment";
 754                         xml_parser_free( $parser );
 755                         return false;
 756                 }
 757                 xml_parser_free( $parser );
 758                 return true;
 759         }
 760
 761         function extractFragment( $text, $position ) {
 762                 $start = max( 0, $position - 10 );
 763                 $before = $position - $start;
 764                 $fragment = '...' .
 765                         $this->termColor( 34 ) .
 766                         substr( $text, $start, $before ) .
 767                         $this->termColor( 0 ) .
 768                         $this->termColor( 31 ) .
 769                         $this->termColor( 1 ) .
 770                         substr( $text, $position, 1 ) .
 771                         $this->termColor( 0 ) .
 772                         $this->termColor( 34 ) .
 773                         substr( $text, $position + 1, 9 ) .
 774                         $this->termColor( 0 ) .
 775                         '...';
 776                 $display = str_replace( "\n", ' ', $fragment );
 777                 $caret = '   ' .
 778                         str_repeat( ' ', $before ) .
 779                         $this->termColor( 31 ) .
 780                         '^' .
 781                         $this->termColor( 0 );
 782                 return "$display\n$caret";
 783         }
 784
 785 }
 786
 787 ?>