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', 'show-output' );
  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/includes/Hooks.php" );
  35 require_once( "$IP/maintenance/parserTestsParserHook.php" );
  36 require_once( "$IP/maintenance/parserTestsStaticParserHook.php" );
  37 require_once( "$IP/maintenance/parserTestsParserTime.php" );
  38
  39 /**
  40  * @package MediaWiki
  41  * @subpackage Maintenance
  42  */
  43 class ParserTest {
  44         /**
  45          * boolean $color whereas output should be colorized
  46          * @private
  47          */
  48         var $color;
  49
  50         /**
  51          * boolean $lightcolor whereas output should use light colors
  52          * @private
  53          */
  54         var $lightcolor;
  55
  56         /**
  57          * boolean $showOutput Show test output
  58          */
  59         var $showOutput;
  60
  61         /**
  62          * Sets terminal colorization and diff/quick modes depending on OS and
  63          * command-line options (--color and --quick).
  64          *
  65          * @public
  66          */
  67         function ParserTest() {
  68                 global $options;
  69
  70                 # Only colorize output if stdout is a terminal.
  71                 $this->lightcolor = false;
  72                 $this->color = !wfIsWindows() && posix_isatty(1);
  73
  74                 if( isset( $options['color'] ) ) {
  75                         switch( $options['color'] ) {
  76                         case 'no':
  77                                 $this->color = false;
  78                                 break;
  79                         case 'light':
  80                                 $this->lightcolor = true;
  81                                 # Fall through
  82                         case 'yes':
  83                         default:
  84                                 $this->color = true;
  85                                 break;
  86                         }
  87                 }
  88
  89                 $this->showDiffs = !isset( $options['quick'] );
  90                 $this->quiet = isset( $options['quiet'] );
  91                 $this->showOutput = isset( $options['show-output'] );
  92
  93
  94                 if (isset($options['regex'])) {
  95                         $this->regex = $options['regex'];
  96                 } else {
  97                         # Matches anything
  98                         $this->regex = '';
  99                 }
 100
 101                 $this->hooks = array();
 102         }
 103
 104         /**
 105          * Remove last character if it is a newline
 106          * @private
 107          */
 108         function chomp($s) {
 109                 if (substr($s, -1) === "\n") {
 110                         return substr($s, 0, -1);
 111                 }
 112                 else {
 113                         return $s;
 114                 }
 115         }
 116
 117         /**
 118          * Run a series of tests listed in the given text file.
 119          * Each test consists of a brief description, wikitext input,
 120          * and the expected HTML output.
 121          *
 122          * Prints status updates on stdout and counts up the total
 123          * number and percentage of passed tests.
 124          *
 125          * @param string $filename
 126          * @return bool True if passed all tests, false if any tests failed.
 127          * @public
 128          */
 129         function runTestsFromFile( $filename ) {
 130                 $infile = fopen( $filename, 'rt' );
 131                 if( !$infile ) {
 132                         wfDie( "Couldn't open $filename\n" );
 133                 }
 134
 135                 $data = array();
 136                 $section = null;
 137                 $success = 0;
 138                 $total = 0;
 139                 $n = 0;
 140                 while( false !== ($line = fgets( $infile ) ) ) {
 141                         $n++;
 142                         if( preg_match( '/^!!\s*(\w+)/', $line, $matches ) ) {
 143                                 $section = strtolower( $matches[1] );
 144                                 if( $section == 'endarticle') {
 145                                         if( !isset( $data['text'] ) ) {
 146                                                 wfDie( "'endarticle' without 'text' at line $n\n" );
 147                                         }
 148                                         if( !isset( $data['article'] ) ) {
 149                                                 wfDie( "'endarticle' without 'article' at line $n\n" );
 150                                         }
 151                                         $this->addArticle($this->chomp($data['article']), $this->chomp($data['text']), $n);
 152                                         $data = array();
 153                                         $section = null;
 154                                         continue;
 155                                 }
 156                                 if( $section == 'endhooks' ) {
 157                                         if( !isset( $data['hooks'] ) ) {
 158                                                 wfDie( "'endhooks' without 'hooks' at line $n\n" );
 159                                         }
 160                                         foreach( explode( "\n", $data['hooks'] ) as $line ) {
 161                                                 $line = trim( $line );
 162                                                 if( $line ) {
 163                                                         $this->requireHook( $line );
 164                                                 }
 165                                         }
 166                                         $data = array();
 167                                         $section = null;
 168                                         continue;
 169                                 }
 170                                 if( $section == 'end' ) {
 171                                         if( !isset( $data['test'] ) ) {
 172                                                 wfDie( "'end' without 'test' at line $n\n" );
 173                                         }
 174                                         if( !isset( $data['input'] ) ) {
 175                                                 wfDie( "'end' without 'input' at line $n\n" );
 176                                         }
 177                                         if( !isset( $data['result'] ) ) {
 178                                                 wfDie( "'end' without 'result' at line $n\n" );
 179                                         }
 180                                         if( !isset( $data['options'] ) ) {
 181                                                 $data['options'] = '';
 182                                         }
 183                                         else {
 184                                                 $data['options'] = $this->chomp( $data['options'] );
 185                                         }
 186                                         if (preg_match('/\\bdisabled\\b/i', $data['options'])
 187                                                 || !preg_match("/{$this->regex}/i", $data['test'])) {
 188                                                 # disabled test
 189                                                 $data = array();
 190                                                 $section = null;
 191                                                 continue;
 192                                         }
 193                                         if( $this->runTest(
 194                                                 $this->chomp( $data['test'] ),
 195                                                 $this->chomp( $data['input'] ),
 196                                                 $this->chomp( $data['result'] ),
 197                                                 $this->chomp( $data['options'] ) ) ) {
 198                                                 $success++;
 199                                         }
 200                                         $total++;
 201                                         $data = array();
 202                                         $section = null;
 203                                         continue;
 204                                 }
 205                                 if ( isset ($data[$section] ) ) {
 206                                         wfDie( "duplicate section '$section' at line $n\n" );
 207                                 }
 208                                 $data[$section] = '';
 209                                 continue;
 210                         }
 211                         if( $section ) {
 212                                 $data[$section] .= $line;
 213                         }
 214                 }
 215                 if( $total > 0 ) {
 216                         $ratio = wfPercent( 100 * $success / $total );
 217                         print $this->termColor( 1 ) . "\nPassed $success of $total tests ($ratio) ";
 218                         if( $success == $total ) {
 219                                 print $this->termColor( 32 ) . "PASSED!";
 220                         } else {
 221                                 print $this->termColor( 31 ) . "FAILED!";
 222                         }
 223                         print $this->termReset() . "\n";
 224                         return ($success == $total);
 225                 } else {
 226                         wfDie( "No tests found.\n" );
 227                 }
 228         }
 229
 230         /**
 231          * Run a given wikitext input through a freshly-constructed wiki parser,
 232          * and compare the output against the expected results.
 233          * Prints status and explanatory messages to stdout.
 234          *
 235          * @param string $input Wikitext to try rendering
 236          * @param string $result Result to output
 237          * @return bool
 238          */
 239         function runTest( $desc, $input, $result, $opts ) {
 240                 if( !$this->quiet ) {
 241                         $this->showTesting( $desc );
 242                 }
 243
 244                 $this->setupGlobals($opts);
 245
 246                 $user = new User();
 247                 $options = ParserOptions::newFromUser( $user );
 248
 249                 if (preg_match('/\\bmath\\b/i', $opts)) {
 250                         # XXX this should probably be done by the ParserOptions
 251                         $options->setUseTex(true);
 252                 }
 253
 254                 if (preg_match('/title=\[\[(.*)\]\]/', $opts, $m)) {
 255                         $titleText = $m[1];
 256                 }
 257                 else {
 258                         $titleText = 'Parser test';
 259                 }
 260
 261                 $noxml = (bool)preg_match( '~\\b noxml \\b~x', $opts );
 262
 263                 $parser = new Parser();
 264                 foreach( $this->hooks as $tag => $callback ) {
 265                         $parser->setHook( $tag, $callback );
 266                 }
 267                 wfRunHooks( 'ParserTestParser', array( &$parser ) );
 268
 269                 $title =& Title::makeTitle( NS_MAIN, $titleText );
 270
 271                 if (preg_match('/\\bpst\\b/i', $opts)) {
 272                         $out = $parser->preSaveTransform( $input, $title, $user, $options );
 273                 } elseif (preg_match('/\\bmsg\\b/i', $opts)) {
 274                         $out = $parser->transformMsg( $input, $options );
 275                 } elseif( preg_match( '/\\bsection=(\d+)\b/i', $opts, $matches ) ) {
 276                         $section = intval( $matches[1] );
 277                         $out = $parser->getSection( $input, $section );
 278                 } elseif( preg_match( '/\\breplace=(\d+),"(.*?)"/i', $opts, $matches ) ) {
 279                         $section = intval( $matches[1] );
 280                         $replace = $matches[2];
 281                         $out = $parser->replaceSection( $input, $section, $replace );
 282                 } else {
 283                         $output = $parser->parse( $input, $title, $options, true, true, 1337 );
 284                         $out = $output->getText();
 285
 286                         if (preg_match('/\\bill\\b/i', $opts)) {
 287                                 $out = $this->tidy( implode( ' ', $output->getLanguageLinks() ) );
 288                         } else if (preg_match('/\\bcat\\b/i', $opts)) {
 289                                 global $wgOut;
 290                                 $wgOut->addCategoryLinks($output->getCategories());
 291                                 $out = $this->tidy ( implode( ' ', $wgOut->getCategoryLinks() ) );
 292                         }
 293
 294                         $result = $this->tidy($result);
 295                 }
 296
 297                 $this->teardownGlobals();
 298
 299                 if( $result === $out && ( $noxml === true || $this->wellFormed( $out ) ) ) {
 300                         return $this->showSuccess( $desc );
 301                 } else {
 302                         return $this->showFailure( $desc, $result, $out );
 303                 }
 304         }
 305
 306         /**
 307          * Set up the global variables for a consistent environment for each test.
 308          * Ideally this should replace the global configuration entirely.
 309          *
 310          * @private
 311          */
 312         function setupGlobals($opts = '') {
 313                 # Save the prefixed / quoted table names for later use when we make the temporaries.
 314                 $db =& wfGetDB( DB_READ );
 315                 $this->oldTableNames = array();
 316                 foreach( $this->listTables() as $table ) {
 317                         $this->oldTableNames[$table] = $db->tableName( $table );
 318                 }
 319                 if( !isset( $this->uploadDir ) ) {
 320                         $this->uploadDir = $this->setupUploadDir();
 321                 }
 322
 323                 if( preg_match( '/language=([a-z]+(?:_[a-z]+)?)/', $opts, $m ) ) {
 324                         $lang = $m[1];
 325                 } else {
 326                         $lang = 'en';
 327                 }
 328
 329                 $settings = array(
 330                         'wgServer' => 'http://localhost',
 331                         'wgScript' => '/index.php',
 332                         'wgScriptPath' => '/',
 333                         'wgArticlePath' => '/wiki/$1',
 334                         'wgActionPaths' => array(),
 335                         'wgUploadPath' => 'http://example.com/images',
 336                         'wgUploadDirectory' => $this->uploadDir,
 337                         'wgStyleSheetPath' => '/skins',
 338                         'wgSitename' => 'MediaWiki',
 339                         'wgServerName' => 'Britney Spears',
 340                         'wgLanguageCode' => $lang,
 341                         'wgContLanguageCode' => $lang,
 342                         'wgDBprefix' => 'parsertest_',
 343
 344                         'wgLang' => null,
 345                         'wgContLang' => null,
 346                         'wgNamespacesWithSubpages' => array( 0 => preg_match('/\\bsubpage\\b/i', $opts)),
 347                         'wgMaxTocLevel' => 999,
 348                         'wgCapitalLinks' => true,
 349                         'wgNoFollowLinks' => true,
 350                         'wgThumbnailScriptPath' => false,
 351                         'wgUseTeX' => false,
 352                         'wgLocaltimezone' => 'UTC',
 353                         'wgAllowExternalImages' => true,
 354                         'wgUseTidy' => false,
 355                         );
 356                 $this->savedGlobals = array();
 357                 foreach( $settings as $var => $val ) {
 358                         $this->savedGlobals[$var] = $GLOBALS[$var];
 359                         $GLOBALS[$var] = $val;
 360                 }
 361                 $langObj = Language::factory( $lang );
 362                 $GLOBALS['wgLang'] = $langObj;
 363                 $GLOBALS['wgContLang'] = $langObj;
 364
 365                 $GLOBALS['wgLoadBalancer']->loadMasterPos();
 366                 //$GLOBALS['wgMessageCache'] = new MessageCache( new BagOStuff(), false, 0, $GLOBALS['wgDBname'] );
 367                 $this->setupDatabase();
 368
 369                 global $wgUser;
 370                 $wgUser = new User();
 371         }
 372
 373         # List of temporary tables to create, without prefix
 374         # Some of these probably aren't necessary
 375         function listTables() {
 376                 $tables = array('user', 'page', 'revision', 'text',
 377                         'pagelinks', 'imagelinks', 'categorylinks',
 378                         'templatelinks', 'externallinks', 'langlinks',
 379                         'site_stats', 'hitcounter',
 380                         'ipblocks', 'image', 'oldimage',
 381                         'recentchanges',
 382                         'watchlist', 'math', 'searchindex',
 383                         'interwiki', 'querycache',
 384                         'objectcache', 'job', 'redirect',
 385                         'querycachetwo'
 386                 );
 387
 388                 // FIXME manually adding additional table for the tasks extension
 389                 // we probably need a better software wide system to register new
 390                 // tables.
 391                 global $wgExtensionFunctions;
 392                 if( in_array('wfTasksExtension' , $wgExtensionFunctions ) ) {
 393                         $tables[] = 'tasks';
 394                 }
 395
 396                 return $tables;
 397         }
 398
 399         /**
 400          * Set up a temporary set of wiki tables to work with for the tests.
 401          * Currently this will only be done once per run, and any changes to
 402          * the db will be visible to later tests in the run.
 403          *
 404          * @private
 405          */
 406         function setupDatabase() {
 407                 static $setupDB = false;
 408                 global $wgDBprefix;
 409
 410                 # Make sure we don't mess with the live DB
 411                 if (!$setupDB && $wgDBprefix === 'parsertest_') {
 412                         # oh teh horror
 413                         $GLOBALS['wgLoadBalancer'] = LoadBalancer::newFromParams( $GLOBALS['wgDBservers'] );
 414                         $db =& wfGetDB( DB_MASTER );
 415
 416                         $tables = $this->listTables();
 417
 418                         if (!(strcmp($db->getServerVersion(), '4.1') < 0 and stristr($db->getSoftwareLink(), 'MySQL'))) {
 419                                 # Database that supports CREATE TABLE ... LIKE
 420                                 global $wgDBtype;
 421                                 if( $wgDBtype == 'postgres' ) {
 422                                         $def = 'INCLUDING DEFAULTS';
 423                                 } else {
 424                                         $def = '';
 425                                 }
 426                                 foreach ($tables as $tbl) {
 427                                         $newTableName = $db->tableName( $tbl );
 428                                         $tableName = $this->oldTableNames[$tbl];
 429                                         $db->query("CREATE TEMPORARY TABLE $newTableName (LIKE $tableName $def)");
 430                                 }
 431                         } else {
 432                                 # Hack for MySQL versions < 4.1, which don't support
 433                                 # "CREATE TABLE ... LIKE". Note that
 434                                 # "CREATE TEMPORARY TABLE ... SELECT * FROM ... LIMIT 0"
 435                                 # would not create the indexes we need....
 436                                 foreach ($tables as $tbl) {
 437                                         $res = $db->query("SHOW CREATE TABLE {$this->oldTableNames[$tbl]}");
 438                                         $row = $db->fetchRow($res);
 439                                         $create = $row[1];
 440                                         $create_tmp = preg_replace('/CREATE TABLE `(.*?)`/', 'CREATE TEMPORARY TABLE `'
 441                                                 . $wgDBprefix . $tbl .'`', $create);
 442                                         if ($create === $create_tmp) {
 443                                                 # Couldn't do replacement
 444                                                 wfDie("could not create temporary table $tbl");
 445                                         }
 446                                         $db->query($create_tmp);
 447                                 }
 448
 449                         }
 450
 451                         # Hack: insert a few Wikipedia in-project interwiki prefixes,
 452                         # for testing inter-language links
 453                         $db->insert( 'interwiki', array(
 454                                 array( 'iw_prefix' => 'Wikipedia',
 455                                        'iw_url'    => 'http://en.wikipedia.org/wiki/$1',
 456                                        'iw_local'  => 0 ),
 457                                 array( 'iw_prefix' => 'MeatBall',
 458                                        'iw_url'    => 'http://www.usemod.com/cgi-bin/mb.pl?$1',
 459                                        'iw_local'  => 0 ),
 460                                 array( 'iw_prefix' => 'zh',
 461                                        'iw_url'    => 'http://zh.wikipedia.org/wiki/$1',
 462                                        'iw_local'  => 1 ),
 463                                 array( 'iw_prefix' => 'es',
 464                                        'iw_url'    => 'http://es.wikipedia.org/wiki/$1',
 465                                        'iw_local'  => 1 ),
 466                                 array( 'iw_prefix' => 'fr',
 467                                        'iw_url'    => 'http://fr.wikipedia.org/wiki/$1',
 468                                        'iw_local'  => 1 ),
 469                                 array( 'iw_prefix' => 'ru',
 470                                        'iw_url'    => 'http://ru.wikipedia.org/wiki/$1',
 471                                        'iw_local'  => 1 ),
 472                                 ) );
 473
 474                         # Hack: Insert an image to work with
 475                         $db->insert( 'image', array(
 476                                 'img_name'        => 'Foobar.jpg',
 477                                 'img_size'        => 12345,
 478                                 'img_description' => 'Some lame file',
 479                                 'img_user'        => 1,
 480                                 'img_user_text'   => 'WikiSysop',
 481                                 'img_timestamp'   => $db->timestamp( '20010115123500' ),
 482                                 'img_width'       => 1941,
 483                                 'img_height'      => 220,
 484                                 'img_bits'        => 24,
 485                                 'img_media_type'  => MEDIATYPE_BITMAP,
 486                                 'img_major_mime'  => "image",
 487                                 'img_minor_mime'  => "jpeg",
 488                                 ) );
 489
 490                         # Update certain things in site_stats
 491                         $db->insert( 'site_stats', array( 'ss_row_id' => 1, 'ss_images' => 1, 'ss_good_articles' => 1 ) );
 492
 493                         $setupDB = true;
 494                 }
 495         }
 496
 497         /**
 498          * Create a dummy uploads directory which will contain a couple
 499          * of files in order to pass existence tests.
 500          * @return string The directory
 501          * @private
 502          */
 503         function setupUploadDir() {
 504                 global $IP;
 505
 506                 $dir = wfTempDir() . "/mwParser-" . mt_rand() . "-images";
 507                 mkdir( $dir );
 508                 mkdir( $dir . '/3' );
 509                 mkdir( $dir . '/3/3a' );
 510
 511                 $img = "$IP/skins/monobook/headbg.jpg";
 512                 $h = fopen($img, 'r');
 513                 $c = fread($h, filesize($img));
 514                 fclose($h);
 515
 516                 $f = fopen( $dir . '/3/3a/Foobar.jpg', 'wb' );
 517                 fwrite( $f, $c );
 518                 fclose( $f );
 519                 return $dir;
 520         }
 521
 522         /**
 523          * Restore default values and perform any necessary clean-up
 524          * after each test runs.
 525          *
 526          * @private
 527          */
 528         function teardownGlobals() {
 529                 foreach( $this->savedGlobals as $var => $val ) {
 530                         $GLOBALS[$var] = $val;
 531                 }
 532                 if( isset( $this->uploadDir ) ) {
 533                         $this->teardownUploadDir( $this->uploadDir );
 534                         unset( $this->uploadDir );
 535                 }
 536         }
 537
 538         /**
 539          * Remove the dummy uploads directory
 540          * @private
 541          */
 542         function teardownUploadDir( $dir ) {
 543                 unlink( "$dir/3/3a/Foobar.jpg" );
 544                 rmdir( "$dir/3/3a" );
 545                 rmdir( "$dir/3" );
 546                 @rmdir( "$dir/thumb/6/65" );
 547                 @rmdir( "$dir/thumb/6" );
 548
 549                 @unlink( "$dir/thumb/3/3a/Foobar.jpg/180px-Foobar.jpg" );
 550                 @rmdir( "$dir/thumb/3/3a/Foobar.jpg" );
 551                 @rmdir( "$dir/thumb/3/3a" );
 552                 @rmdir( "$dir/thumb/3/39" ); # wtf?
 553                 @rmdir( "$dir/thumb/3" );
 554                 @rmdir( "$dir/thumb" );
 555                 @rmdir( "$dir" );
 556         }
 557
 558         /**
 559          * "Running test $desc..."
 560          * @private
 561          */
 562         function showTesting( $desc ) {
 563                 print "Running test $desc... ";
 564         }
 565
 566         /**
 567          * Print a happy success message.
 568          *
 569          * @param string $desc The test name
 570          * @return bool
 571          * @private
 572          */
 573         function showSuccess( $desc ) {
 574                 if( !$this->quiet ) {
 575                         print $this->termColor( '1;32' ) . 'PASSED' . $this->termReset() . "\n";
 576                 }
 577                 return true;
 578         }
 579
 580         /**
 581          * Print a failure message and provide some explanatory output
 582          * about what went wrong if so configured.
 583          *
 584          * @param string $desc The test name
 585          * @param string $result Expected HTML output
 586          * @param string $html Actual HTML output
 587          * @return bool
 588          * @private
 589          */
 590         function showFailure( $desc, $result, $html ) {
 591                 if( $this->quiet ) {
 592                         # In quiet mode we didn't show the 'Testing' message before the
 593                         # test, in case it succeeded. Show it now:
 594                         $this->showTesting( $desc );
 595                 }
 596                 print $this->termColor( '1;31' ) . 'FAILED!' . $this->termReset() . "\n";
 597                 if ( $this->showOutput ) {
 598                         print "--- Expected ---\n$result\n--- Actual ---\n$html\n";
 599                 }
 600                 if( $this->showDiffs ) {
 601                         print $this->quickDiff( $result, $html );
 602                         if( !$this->wellFormed( $html ) ) {
 603                                 print "XML error: $this->mXmlError\n";
 604                         }
 605                 }
 606                 return false;
 607         }
 608
 609         /**
 610          * Run given strings through a diff and return the (colorized) output.
 611          * Requires writable /tmp directory and a 'diff' command in the PATH.
 612          *
 613          * @param string $input
 614          * @param string $output
 615          * @param string $inFileTail Tailing for the input file name
 616          * @param string $outFileTail Tailing for the output file name
 617          * @return string
 618          * @private
 619          */
 620         function quickDiff( $input, $output, $inFileTail='expected', $outFileTail='actual' ) {
 621                 $prefix = wfTempDir() . "/mwParser-" . mt_rand();
 622
 623                 $infile = "$prefix-$inFileTail";
 624                 $this->dumpToFile( $input, $infile );
 625
 626                 $outfile = "$prefix-$outFileTail";
 627                 $this->dumpToFile( $output, $outfile );
 628
 629                 $diff = `diff -au $infile $outfile`;
 630                 unlink( $infile );
 631                 unlink( $outfile );
 632
 633                 return $this->colorDiff( $diff );
 634         }
 635
 636         /**
 637          * Write the given string to a file, adding a final newline.
 638          *
 639          * @param string $data
 640          * @param string $filename
 641          * @private
 642          */
 643         function dumpToFile( $data, $filename ) {
 644                 $file = fopen( $filename, "wt" );
 645                 fwrite( $file, $data . "\n" );
 646                 fclose( $file );
 647         }
 648
 649         /**
 650          * Return ANSI terminal escape code for changing text attribs/color,
 651          * or empty string if color output is disabled.
 652          *
 653          * @param string $color Semicolon-separated list of attribute/color codes
 654          * @return string
 655          * @private
 656          */
 657         function termColor( $color ) {
 658                 if($this->lightcolor) {
 659                         return $this->color ? "\x1b[1;{$color}m" : '';
 660                 } else {
 661                         return $this->color ? "\x1b[{$color}m" : '';
 662                 }
 663         }
 664
 665         /**
 666          * Return ANSI terminal escape code for restoring default text attributes,
 667          * or empty string if color output is disabled.
 668          *
 669          * @return string
 670          * @private
 671          */
 672         function termReset() {
 673                 return $this->color ? "\x1b[0m" : '';
 674         }
 675
 676         /**
 677          * Colorize unified diff output if set for ANSI color output.
 678          * Subtractions are colored blue, additions red.
 679          *
 680          * @param string $text
 681          * @return string
 682          * @private
 683          */
 684         function colorDiff( $text ) {
 685                 return preg_replace(
 686                         array( '/^(-.*)$/m', '/^(\+.*)$/m' ),
 687                         array( $this->termColor( 34 ) . '$1' . $this->termReset(),
 688                                $this->termColor( 31 ) . '$1' . $this->termReset() ),
 689                         $text );
 690         }
 691
 692         /**
 693          * Insert a temporary test article
 694          * @param string $name the title, including any prefix
 695          * @param string $text the article text
 696          * @param int $line the input line number, for reporting errors
 697          * @private
 698          */
 699         function addArticle($name, $text, $line) {
 700                 $this->setupGlobals();
 701                 $title = Title::newFromText( $name );
 702                 if ( is_null($title) ) {
 703                         wfDie( "invalid title at line $line\n" );
 704                 }
 705
 706                 $aid = $title->getArticleID( GAID_FOR_UPDATE );
 707                 if ($aid != 0) {
 708                         wfDie( "duplicate article at line $line\n" );
 709                 }
 710
 711                 $art = new Article($title);
 712                 $art->insertNewArticle($text, '', false, false );
 713                 $this->teardownGlobals();
 714         }
 715
 716         /**
 717          * Steal a callback function from the primary parser, save it for
 718          * application to our scary parser. If the hook is not installed,
 719          * die a painful dead to warn the others.
 720          * @param string $name
 721          */
 722         private function requireHook( $name ) {
 723                 global $wgParser;
 724                 if( isset( $wgParser->mTagHooks[$name] ) ) {
 725                         $this->hooks[$name] = $wgParser->mTagHooks[$name];
 726                 } else {
 727                         wfDie( "This test suite requires the '$name' hook extension.\n" );
 728                 }
 729         }
 730
 731         /*
 732          * Run the "tidy" command on text if the $wgUseTidy
 733          * global is true
 734          *
 735          * @param string $text the text to tidy
 736          * @return string
 737          * @static
 738          * @private
 739          */
 740         function tidy( $text ) {
 741                 global $wgUseTidy;
 742                 if ($wgUseTidy) {
 743                         $text = Parser::tidy($text);
 744                 }
 745                 return $text;
 746         }
 747
 748         function wellFormed( $text ) {
 749                 $html =
 750                         Sanitizer::hackDocType() .
 751                         '<html>' .
 752                         $text .
 753                         '</html>';
 754
 755                 $parser = xml_parser_create( "UTF-8" );
 756
 757                 # case folding violates XML standard, turn it off
 758                 xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
 759
 760                 if( !xml_parse( $parser, $html, true ) ) {
 761                         $err = xml_error_string( xml_get_error_code( $parser ) );
 762                         $position = xml_get_current_byte_index( $parser );
 763                         $fragment = $this->extractFragment( $html, $position );
 764                         $this->mXmlError = "$err at byte $position:\n$fragment";
 765                         xml_parser_free( $parser );
 766                         return false;
 767                 }
 768                 xml_parser_free( $parser );
 769                 return true;
 770         }
 771
 772         function extractFragment( $text, $position ) {
 773                 $start = max( 0, $position - 10 );
 774                 $before = $position - $start;
 775                 $fragment = '...' .
 776                         $this->termColor( 34 ) .
 777                         substr( $text, $start, $before ) .
 778                         $this->termColor( 0 ) .
 779                         $this->termColor( 31 ) .
 780                         $this->termColor( 1 ) .
 781                         substr( $text, $position, 1 ) .
 782                         $this->termColor( 0 ) .
 783                         $this->termColor( 34 ) .
 784                         substr( $text, $position + 1, 9 ) .
 785                         $this->termColor( 0 ) .
 786                         '...';
 787                 $display = str_replace( "\n", ' ', $fragment );
 788                 $caret = '   ' .
 789                         str_repeat( ' ', $before ) .
 790                         $this->termColor( 31 ) .
 791                         '^' .
 792                         $this->termColor( 0 );
 793                 return "$display\n$caret";
 794         }
 795
 796 }
 797
 798 ?>