parserTest.inc

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<?php
# Copyright (C) 2004, 2010 Brion Vibber <[email protected]>
# http://www.mediawiki.org/
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# http://www.gnu.org/copyleft/gpl.html

class ParserTest {
        private $color;

        private $showOutput;

        private $useTemporaryTables = true;

        private $databaseSetupDone = false;

        private $db;

        private $dbClone;

        private $oldTablePrefix;

        private $maxFuzzTestLength = 300;
        private $fuzzSeed = 0;
        private $memoryLimit = 50;
        private $uploadDir = null;

        public $regex = "";
        private $savedGlobals = array();
        public function __construct( $options = array() ) {
                # Only colorize output if stdout is a terminal.
                $this->color = !wfIsWindows() && Maintenance::posix_isatty( 1 );

                if ( isset( $options['color'] ) ) {
                        switch( $options['color'] ) {
                        case 'no':
                                $this->color = false;
                                break;
                        case 'yes':
                        default:
                                $this->color = true;
                                break;
                        }
                }

                $this->term = $this->color
                        ? new AnsiTermColorer()
                        : new DummyTermColorer();

                $this->showDiffs = !isset( $options['quick'] );
                $this->showProgress = !isset( $options['quiet'] );
                $this->showFailure = !(
                        isset( $options['quiet'] )
                        && ( isset( $options['record'] )
                                || isset( $options['compare'] ) ) ); // redundant output

                $this->showOutput = isset( $options['show-output'] );

                if ( isset( $options['filter'] ) ) {
                        $options['regex'] = $options['filter'];
                }

                if ( isset( $options['regex'] ) ) {
                        if ( isset( $options['record'] ) ) {
                                echo "Warning: --record cannot be used with --regex, disabling --record\n";
                                unset( $options['record'] );
                        }
                        $this->regex = $options['regex'];
                } else {
                        # Matches anything
                        $this->regex = '';
                }

                $this->setupRecorder( $options );
                $this->keepUploads = isset( $options['keep-uploads'] );

                if ( isset( $options['seed'] ) ) {
                        $this->fuzzSeed = intval( $options['seed'] ) - 1;
                }

                $this->runDisabled = isset( $options['run-disabled'] );

                $this->hooks = array();
                $this->functionHooks = array();
                self::setUp();
        }

        static function setUp() {
                global $wgParser, $wgParserConf, $IP, $messageMemc, $wgMemc,
                        $wgUser, $wgLang, $wgOut, $wgRequest, $wgStyleDirectory, $wgEnableParserCache,
                        $wgNamespaceAliases, $wgNamespaceProtection, $wgLocalFileRepo,
                        $parserMemc, $wgThumbnailScriptPath, $wgScriptPath,
                        $wgArticlePath, $wgStyleSheetPath, $wgScript, $wgStylePath, $wgExtensionAssetsPath,
                        $wgMainCacheType, $wgMessageCacheType, $wgParserCacheType, $wgLockManagers;

                $wgScript = '/index.php';
                $wgScriptPath = '/';
                $wgArticlePath = '/wiki/$1';
                $wgStyleSheetPath = '/skins';
                $wgStylePath = '/skins';
                $wgExtensionAssetsPath = '/extensions';
                $wgThumbnailScriptPath = false;
                $wgLockManagers = array( array(
                        'name'          => 'fsLockManager',
                        'class'         => 'FSLockManager',
                        'lockDirectory' => wfTempDir() . '/test-repo/lockdir',
                ) );
                $wgLocalFileRepo = array(
                        'class'           => 'LocalRepo',
                        'name'            => 'local',
                        'url'             => 'http://example.com/images',
                        'hashLevels'      => 2,
                        'transformVia404' => false,
                        'backend'         => new FSFileBackend( array(
                                'name'        => 'local-backend',
                                'lockManager' => 'fsLockManager',
                                'containerPaths' => array(
                                        'local-public'  => wfTempDir() . '/test-repo/public',
                                        'local-thumb'   => wfTempDir() . '/test-repo/thumb',
                                        'local-temp'    => wfTempDir() . '/test-repo/temp',
                                        'local-deleted' => wfTempDir() . '/test-repo/deleted',
                                )
                        ) )
                );
                $wgNamespaceProtection[NS_MEDIAWIKI] = 'editinterface';
                $wgNamespaceAliases['Image'] = NS_FILE;
                $wgNamespaceAliases['Image_talk'] = NS_FILE_TALK;

                // XXX: tests won't run without this (for CACHE_DB)
                if ( $wgMainCacheType === CACHE_DB ) {
                        $wgMainCacheType = CACHE_NONE;
                }
                if ( $wgMessageCacheType === CACHE_DB ) {
                        $wgMessageCacheType = CACHE_NONE;
                }
                if ( $wgParserCacheType === CACHE_DB ) {
                        $wgParserCacheType = CACHE_NONE;
                }

                $wgEnableParserCache = false;
                DeferredUpdates::clearPendingUpdates();
                $wgMemc = wfGetMainCache(); // checks $wgMainCacheType
                $messageMemc = wfGetMessageCacheStorage();
                $parserMemc = wfGetParserCacheStorage();

                // $wgContLang = new StubContLang;
                $wgUser = new User;
                $context = new RequestContext;
                $wgLang = $context->getLanguage();
                $wgOut = $context->getOutput();
                $wgParser = new StubObject( 'wgParser', $wgParserConf['class'], array( $wgParserConf ) );
                $wgRequest = $context->getRequest();

                if ( $wgStyleDirectory === false ) {
                        $wgStyleDirectory   = "$IP/skins";
                }

        }

        public function setupRecorder ( $options ) {
                if ( isset( $options['record'] ) ) {
                        $this->recorder = new DbTestRecorder( $this );
                        $this->recorder->version = isset( $options['setversion'] ) ?
                                        $options['setversion'] : SpecialVersion::getVersion();
                } elseif ( isset( $options['compare'] ) ) {
                        $this->recorder = new DbTestPreviewer( $this );
                } else {
                        $this->recorder = new TestRecorder( $this );
                }
        }

        static public function chomp( $s ) {
                if ( substr( $s, -1 ) === "\n" ) {
                        return substr( $s, 0, -1 );
                }
                else {
                        return $s;
                }
        }

        function fuzzTest( $filenames ) {
                $GLOBALS['wgContLang'] = Language::factory( 'en' );
                $dict = $this->getFuzzInput( $filenames );
                $dictSize = strlen( $dict );
                $logMaxLength = log( $this->maxFuzzTestLength );
                $this->setupDatabase();
                ini_set( 'memory_limit', $this->memoryLimit * 1048576 );

                $numTotal = 0;
                $numSuccess = 0;
                $user = new User;
                $opts = ParserOptions::newFromUser( $user );
                $title = Title::makeTitle( NS_MAIN, 'Parser_test' );

                while ( true ) {
                        // Generate test input
                        mt_srand( ++$this->fuzzSeed );
                        $totalLength = mt_rand( 1, $this->maxFuzzTestLength );
                        $input = '';

                        while ( strlen( $input ) < $totalLength ) {
                                $logHairLength = mt_rand( 0, 1000000 ) / 1000000 * $logMaxLength;
                                $hairLength = min( intval( exp( $logHairLength ) ), $dictSize );
                                $offset = mt_rand( 0, $dictSize - $hairLength );
                                $input .= substr( $dict, $offset, $hairLength );
                        }

                        $this->setupGlobals();
                        $parser = $this->getParser();

                        // Run the test
                        try {
                                $parser->parse( $input, $title, $opts );
                                $fail = false;
                        } catch ( Exception $exception ) {
                                $fail = true;
                        }

                        if ( $fail ) {
                                echo "Test failed with seed {$this->fuzzSeed}\n";
                                echo "Input:\n";
                                printf( "string(%d) \"%s\"\n\n", strlen( $input ), $input );
                                echo "$exception\n";
                        } else {
                                $numSuccess++;
                        }

                        $numTotal++;
                        $this->teardownGlobals();
                        $parser->__destruct();

                        if ( $numTotal % 100 == 0 ) {
                                $usage = intval( memory_get_usage( true ) / $this->memoryLimit / 1048576 * 100 );
                                echo "{$this->fuzzSeed}: $numSuccess/$numTotal (mem: $usage%)\n";
                                if ( $usage > 90 ) {
                                        echo "Out of memory:\n";
                                        $memStats = $this->getMemoryBreakdown();

                                        foreach ( $memStats as $name => $usage ) {
                                                echo "$name: $usage\n";
                                        }
                                        $this->abort();
                                }
                        }
                }
        }

        function getFuzzInput( $filenames ) {
                $dict = '';

                foreach ( $filenames as $filename ) {
                        $contents = file_get_contents( $filename );
                        preg_match_all( '/!!\s*input\n(.*?)\n!!\s*result/s', $contents, $matches );

                        foreach ( $matches[1] as $match ) {
                                $dict .= $match . "\n";
                        }
                }

                return $dict;
        }

        function getMemoryBreakdown() {
                $memStats = array();

                foreach ( $GLOBALS as $name => $value ) {
                        $memStats['$' . $name] = strlen( serialize( $value ) );
                }

                $classes = get_declared_classes();

                foreach ( $classes as $class ) {
                        $rc = new ReflectionClass( $class );
                        $props = $rc->getStaticProperties();
                        $memStats[$class] = strlen( serialize( $props ) );
                        $methods = $rc->getMethods();

                        foreach ( $methods as $method ) {
                                $memStats[$class] += strlen( serialize( $method->getStaticVariables() ) );
                        }
                }

                $functions = get_defined_functions();

                foreach ( $functions['user'] as $function ) {
                        $rf = new ReflectionFunction( $function );
                        $memStats["$function()"] = strlen( serialize( $rf->getStaticVariables() ) );
                }

                asort( $memStats );

                return $memStats;
        }

        function abort() {
                $this->abort();
        }

        public function runTestsFromFiles( $filenames ) {
                $ok = false;
                $GLOBALS['wgContLang'] = Language::factory( 'en' );
                $this->recorder->start();
                try {
                        $this->setupDatabase();
                        $ok = true;

                        foreach ( $filenames as $filename ) {
                                $tests = new TestFileIterator( $filename, $this );
                                $ok = $this->runTests( $tests ) && $ok;
                        }

                        $this->teardownDatabase();
                        $this->recorder->report();
                } catch (DBError $e) {
                        echo $e->getMessage();
                }
                $this->recorder->end();

                return $ok;
        }

        function runTests( $tests ) {
                $ok = true;

                foreach ( $tests as $t ) {
                        $result =
                                $this->runTest( $t['test'], $t['input'], $t['result'], $t['options'], $t['config'] );
                        $ok = $ok && $result;
                        $this->recorder->record( $t['test'], $result );
                }

                if ( $this->showProgress ) {
                        print "\n";
                }

                return $ok;
        }

        function getParser( $preprocessor = null ) {
                global $wgParserConf;

                $class = $wgParserConf['class'];
                $parser = new $class( array( 'preprocessorClass' => $preprocessor ) + $wgParserConf );

                foreach ( $this->hooks as $tag => $callback ) {
                        $parser->setHook( $tag, $callback );
                }

                foreach ( $this->functionHooks as $tag => $bits ) {
                        list( $callback, $flags ) = $bits;
                        $parser->setFunctionHook( $tag, $callback, $flags );
                }

                wfRunHooks( 'ParserTestParser', array( &$parser ) );

                return $parser;
        }

        public function runTest( $desc, $input, $result, $opts, $config ) {
                if ( $this->showProgress ) {
                        $this->showTesting( $desc );
                }

                $opts = $this->parseOptions( $opts );
                $context = $this->setupGlobals( $opts, $config );

                $user = $context->getUser();
                $options = ParserOptions::newFromContext( $context );

                if ( isset( $opts['title'] ) ) {
                        $titleText = $opts['title'];
                }
                else {
                        $titleText = 'Parser test';
                }

                $local = isset( $opts['local'] );
                $preprocessor = isset( $opts['preprocessor'] ) ? $opts['preprocessor'] : null;
                $parser = $this->getParser( $preprocessor );
                $title = Title::newFromText( $titleText );

                if ( isset( $opts['pst'] ) ) {
                        $out = $parser->preSaveTransform( $input, $title, $user, $options );
                } elseif ( isset( $opts['msg'] ) ) {
                        $out = $parser->transformMsg( $input, $options, $title );
                } elseif ( isset( $opts['section'] ) ) {
                        $section = $opts['section'];
                        $out = $parser->getSection( $input, $section );
                } elseif ( isset( $opts['replace'] ) ) {
                        $section = $opts['replace'][0];
                        $replace = $opts['replace'][1];
                        $out = $parser->replaceSection( $input, $section, $replace );
                } elseif ( isset( $opts['comment'] ) ) {
                        $out = Linker::formatComment( $input, $title, $local );
                } elseif ( isset( $opts['preload'] ) ) {
                        $out = $parser->getpreloadText( $input, $title, $options );
                } else {
                        $output = $parser->parse( $input, $title, $options, true, true, 1337 );
                        $out = $output->getText();

                        if ( isset( $opts['showtitle'] ) ) {
                                if ( $output->getTitleText() ) {
                                        $title = $output->getTitleText();
                                }

                                $out = "$title\n$out";
                        }

                        if ( isset( $opts['ill'] ) ) {
                                $out = $this->tidy( implode( ' ', $output->getLanguageLinks() ) );
                        } elseif ( isset( $opts['cat'] ) ) {
                                $outputPage = $context->getOutput();
                                $outputPage->addCategoryLinks( $output->getCategories() );
                                $cats = $outputPage->getCategoryLinks();

                                if ( isset( $cats['normal'] ) ) {
                                        $out = $this->tidy( implode( ' ', $cats['normal'] ) );
                                } else {
                                        $out = '';
                                }
                        }

                        $result = $this->tidy( $result );
                }

                $this->teardownGlobals();
                return $this->showTestResult( $desc, $result, $out );
        }

        function showTestResult( $desc, $result, $out ) {
                if ( $result === $out ) {
                        $this->showSuccess( $desc );
                        return true;
                } else {
                        $this->showFailure( $desc, $result, $out );
                        return false;
                }
        }

        private static function getOptionValue( $key, $opts, $default ) {
                $key = strtolower( $key );

                if ( isset( $opts[$key] ) ) {
                        return $opts[$key];
                } else {
                        return $default;
                }
        }

        private function parseOptions( $instring ) {
                $opts = array();
                // foo
                // foo=bar
                // foo="bar baz"
                // foo=[[bar baz]]
                // foo=bar,"baz quux"
                $regex = '/\b
                        ([\w-]+)                                                # Key
                        \b
                        (?:\s*
                                =                                               # First sub-value
                                \s*
                                (
                                        "
                                                [^"]*                   # Quoted val
                                        "
                                |
                                        \[\[
                                                [^]]*                   # Link target
                                        \]\]
                                |
                                        [\w-]+                          # Plain word
                                )
                                (?:\s*
                                        ,                                       # Sub-vals 1..N
                                        \s*
                                        (
                                                "[^"]*"                 # Quoted val
                                        |
                                                \[\[[^]]*\]\]   # Link target
                                        |
                                                [\w-]+                  # Plain word
                                        )
                                )*
                        )?
                        /x';

                if ( preg_match_all( $regex, $instring, $matches, PREG_SET_ORDER ) ) {
                        foreach ( $matches as $bits ) {
                                array_shift( $bits );
                                $key = strtolower( array_shift( $bits ) );
                                if ( count( $bits ) == 0 ) {
                                        $opts[$key] = true;
                                } elseif ( count( $bits ) == 1 ) {
                                        $opts[$key] = $this->cleanupOption( array_shift( $bits ) );
                                } else {
                                        // Array!
                                        $opts[$key] = array_map( array( $this, 'cleanupOption' ), $bits );
                                }
                        }
                }
                return $opts;
        }

        private function cleanupOption( $opt ) {
                if ( substr( $opt, 0, 1 ) == '"' ) {
                        return substr( $opt, 1, -1 );
                }

                if ( substr( $opt, 0, 2 ) == '[[' ) {
                        return substr( $opt, 2, -2 );
                }
                return $opt;
        }

        private function setupGlobals( $opts = '', $config = '' ) {
                # Find out values for some special options.
                $lang =
                        self::getOptionValue( 'language', $opts, 'en' );
                $variant =
                        self::getOptionValue( 'variant', $opts, false );
                $maxtoclevel =
                        self::getOptionValue( 'wgMaxTocLevel', $opts, 999 );
                $linkHolderBatchSize =
                        self::getOptionValue( 'wgLinkHolderBatchSize', $opts, 1000 );

                $settings = array(
                        'wgServer' => 'http://Britney-Spears',
                        'wgScript' => '/index.php',
                        'wgScriptPath' => '/',
                        'wgArticlePath' => '/wiki/$1',
                        'wgActionPaths' => array(),
                        'wgLockManagers' => array(
                                'name'          => 'fsLockManager',
                                'class'         => 'FSLockManager',
                                'lockDirectory' => $this->uploadDir . '/lockdir',
                        ),
                        'wgLocalFileRepo' => array(
                                'class' => 'LocalRepo',
                                'name' => 'local',
                                'url' => 'http://example.com/images',
                                'hashLevels' => 2,
                                'transformVia404' => false,
                                'backend'         => new FSFileBackend( array(
                                        'name'        => 'local-backend',
                                        'lockManager' => 'fsLockManager',
                                        'containerPaths' => array(
                                                'local-public'  => $this->uploadDir,
                                                'local-thumb'   => $this->uploadDir . '/thumb',
                                                'local-temp'    => $this->uploadDir . '/temp',
                                                'local-deleted' => $this->uploadDir . '/delete',
                                        )
                                ) )
                        ),
                        'wgEnableUploads' => self::getOptionValue( 'wgEnableUploads', $opts, true ),
                        'wgStylePath' => '/skins',
                        'wgStyleSheetPath' => '/skins',
                        'wgSitename' => 'MediaWiki',
                        'wgLanguageCode' => $lang,
                        'wgDBprefix' => $this->db->getType() != 'oracle' ? 'parsertest_' : 'pt_',
                        'wgRawHtml' => isset( $opts['rawhtml'] ),
                        'wgLang' => null,
                        'wgContLang' => null,
                        'wgNamespacesWithSubpages' => array( 0 => isset( $opts['subpage'] ) ),
                        'wgMaxTocLevel' => $maxtoclevel,
                        'wgCapitalLinks' => true,
                        'wgNoFollowLinks' => true,
                        'wgNoFollowDomainExceptions' => array(),
                        'wgThumbnailScriptPath' => false,
                        'wgUseImageResize' => false,
                        'wgLocaltimezone' => 'UTC',
                        'wgAllowExternalImages' => true,
                        'wgUseTidy' => false,
                        'wgDefaultLanguageVariant' => $variant,
                        'wgVariantArticlePath' => false,
                        'wgGroupPermissions' => array( '*' => array(
                                'createaccount' => true,
                                'read'          => true,
                                'edit'          => true,
                                'createpage'    => true,
                                'createtalk'    => true,
                        ) ),
                        'wgNamespaceProtection' => array( NS_MEDIAWIKI => 'editinterface' ),
                        'wgDefaultExternalStore' => array(),
                        'wgForeignFileRepos' => array(),
                        'wgLinkHolderBatchSize' => $linkHolderBatchSize,
                        'wgExperimentalHtmlIds' => false,
                        'wgExternalLinkTarget' => false,
                        'wgAlwaysUseTidy' => false,
                        'wgHtml5' => true,
                        'wgWellFormedXml' => true,
                        'wgAllowMicrodataAttributes' => true,
                        'wgAdaptiveMessageCache' => true,
                        'wgDisableLangConversion' => false,
                        'wgDisableTitleConversion' => false,
                );

                if ( $config ) {
                        $configLines = explode( "\n", $config );

                        foreach ( $configLines as $line ) {
                                list( $var, $value ) = explode( '=', $line, 2 );

                                $settings[$var] = eval( "return $value;" );
                        }
                }

                $this->savedGlobals = array();

                wfRunHooks( 'ParserTestGlobals', array( &$settings ) );

                foreach ( $settings as $var => $val ) {
                        if ( array_key_exists( $var, $GLOBALS ) ) {
                                $this->savedGlobals[$var] = $GLOBALS[$var];
                        }

                        $GLOBALS[$var] = $val;
                }

                $GLOBALS['wgContLang'] = Language::factory( $lang );
                $GLOBALS['wgMemc'] = new EmptyBagOStuff;

                $context = new RequestContext();
                $GLOBALS['wgLang'] = $context->getLanguage();
                $GLOBALS['wgOut'] = $context->getOutput();

                $GLOBALS['wgUser'] = new User();

                global $wgHooks;

                $wgHooks['ParserTestParser'][] = 'ParserTestParserHook::setup';
                $wgHooks['ParserGetVariableValueTs'][] = 'ParserTest::getFakeTimestamp';

                MagicWord::clearCache();

                return $context;
        }

        private function listTables() {
                $tables = array( 'user', 'user_properties', 'user_former_groups', 'page', 'page_restrictions',
                        'protected_titles', 'revision', 'text', 'pagelinks', 'imagelinks',
                        'categorylinks', 'templatelinks', 'externallinks', 'langlinks', 'iwlinks',
                        'site_stats', 'hitcounter',     'ipblocks', 'image', 'oldimage',
                        'recentchanges', 'watchlist', 'interwiki', 'logging',
                        'querycache', 'objectcache', 'job', 'l10n_cache', 'redirect', 'querycachetwo',
                        'archive', 'user_groups', 'page_props', 'category', 'msg_resource', 'msg_resource_links'
                );

                if ( in_array( $this->db->getType(), array( 'mysql', 'sqlite', 'oracle' ) ) ) {
                        array_push( $tables, 'searchindex' );
                }

                // Allow extensions to add to the list of tables to duplicate;
                // may be necessary if they hook into page save or other code
                // which will require them while running tests.
                wfRunHooks( 'ParserTestTables', array( &$tables ) );

                return $tables;
        }

        public function setupDatabase() {
                global $wgDBprefix;

                if ( $this->databaseSetupDone ) {
                        return;
                }

                $this->db = wfGetDB( DB_MASTER );
                $dbType = $this->db->getType();

                if ( $wgDBprefix === 'parsertest_' || ( $dbType == 'oracle' && $wgDBprefix === 'pt_' ) ) {
                        throw new MWException( 'setupDatabase should be called before setupGlobals' );
                }

                $this->databaseSetupDone = true;
                $this->oldTablePrefix = $wgDBprefix;

                # SqlBagOStuff broke when using temporary tables on r40209 (bug 15892).
                # It seems to have been fixed since (r55079?), but regressed at some point before r85701.
                # This works around it for now...
                ObjectCache::$instances[CACHE_DB] = new HashBagOStuff;

                # CREATE TEMPORARY TABLE breaks if there is more than one server
                if ( wfGetLB()->getServerCount() != 1 ) {
                        $this->useTemporaryTables = false;
                }

                $temporary = $this->useTemporaryTables || $dbType == 'postgres';
                $prefix = $dbType != 'oracle' ? 'parsertest_' : 'pt_';

                $this->dbClone = new CloneDatabase( $this->db, $this->listTables(), $prefix );
                $this->dbClone->useTemporaryTables( $temporary );
                $this->dbClone->cloneTableStructure();

                if ( $dbType == 'oracle' ) {
                        $this->db->query( 'BEGIN FILL_WIKI_INFO; END;' );
                        # Insert 0 user to prevent FK violations

                        # Anonymous user
                        $this->db->insert( 'user', array(
                                'user_id'         => 0,
                                'user_name'       => 'Anonymous' ) );
                }

                # Hack: insert a few Wikipedia in-project interwiki prefixes,
                # for testing inter-language links
                $this->db->insert( 'interwiki', array(
                        array( 'iw_prefix' => 'wikipedia',
                                   'iw_url'    => 'http://en.wikipedia.org/wiki/$1',
                                   'iw_api'    => '',
                                   'iw_wikiid' => '',
                                   'iw_local'  => 0 ),
                        array( 'iw_prefix' => 'meatball',
                                   'iw_url'    => 'http://www.usemod.com/cgi-bin/mb.pl?$1',
                                   'iw_api'    => '',
                                   'iw_wikiid' => '',
                                   'iw_local'  => 0 ),
                        array( 'iw_prefix' => 'zh',
                                   'iw_url'    => 'http://zh.wikipedia.org/wiki/$1',
                                   'iw_api'    => '',
                                   'iw_wikiid' => '',
                                   'iw_local'  => 1 ),
                        array( 'iw_prefix' => 'es',
                                   'iw_url'    => 'http://es.wikipedia.org/wiki/$1',
                                   'iw_api'    => '',
                                   'iw_wikiid' => '',
                                   'iw_local'  => 1 ),
                        array( 'iw_prefix' => 'fr',
                                   'iw_url'    => 'http://fr.wikipedia.org/wiki/$1',
                                   'iw_api'    => '',
                                   'iw_wikiid' => '',
                                   'iw_local'  => 1 ),
                        array( 'iw_prefix' => 'ru',
                                   'iw_url'    => 'http://ru.wikipedia.org/wiki/$1',
                                   'iw_api'    => '',
                                   'iw_wikiid' => '',
                                   'iw_local'  => 1 ),
                        ) );

                # Update certain things in site_stats
                $this->db->insert( 'site_stats', array( 'ss_row_id' => 1, 'ss_images' => 2, 'ss_good_articles' => 1 ) );

                # Reinitialise the LocalisationCache to match the database state
                Language::getLocalisationCache()->unloadAll();

                # Clear the message cache
                MessageCache::singleton()->clear();

                $this->uploadDir = $this->setupUploadDir();
                $user = User::createNew( 'WikiSysop' );
                $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Foobar.jpg' ) );
                $image->recordUpload2( '', 'Upload of some lame file', 'Some lame file', array(
                        'size'        => 12345,
                        'width'       => 1941,
                        'height'      => 220,
                        'bits'        => 24,
                        'media_type'  => MEDIATYPE_BITMAP,
                        'mime'        => 'image/jpeg',
                        'metadata'    => serialize( array() ),
                        'sha1'        => wfBaseConvert( '', 16, 36, 31 ),
                        'fileExists'  => true
                        ), $this->db->timestamp( '20010115123500' ), $user );

                # This image will be blacklisted in [[MediaWiki:Bad image list]]
                $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Bad.jpg' ) );
                $image->recordUpload2( '', 'zomgnotcensored', 'Borderline image', array(
                        'size'        => 12345,
                        'width'       => 320,
                        'height'      => 240,
                        'bits'        => 24,
                        'media_type'  => MEDIATYPE_BITMAP,
                        'mime'        => 'image/jpeg',
                        'metadata'    => serialize( array() ),
                        'sha1'        => wfBaseConvert( '', 16, 36, 31 ),
                        'fileExists'  => true
                        ), $this->db->timestamp( '20010115123500' ), $user );
        }

        public function teardownDatabase() {
                if ( !$this->databaseSetupDone ) {
                        $this->teardownGlobals();
                        return;
                }
                $this->teardownUploadDir( $this->uploadDir );

                $this->dbClone->destroy();
                $this->databaseSetupDone = false;

                if ( $this->useTemporaryTables ) {
                        if( $this->db->getType() == 'sqlite' ) {
                                # Under SQLite the searchindex table is virtual and need
                                # to be explicitly destroyed. See bug 29912
                                # See also MediaWikiTestCase::destroyDB()
                                wfDebug( __METHOD__ . " explicitly destroying sqlite virtual table parsertest_searchindex\n" );
                                $this->db->query( "DROP TABLE `parsertest_searchindex`" );
                        }
                        # Don't need to do anything
                        $this->teardownGlobals();
                        return;
                }

                $tables = $this->listTables();

                foreach ( $tables as $table ) {
                        $sql = $this->db->getType() == 'oracle' ? "DROP TABLE pt_$table DROP CONSTRAINTS" : "DROP TABLE `parsertest_$table`";
                        $this->db->query( $sql );
                }

                if ( $this->db->getType() == 'oracle' )
                        $this->db->query( 'BEGIN FILL_WIKI_INFO; END;' );

                $this->teardownGlobals();
        }

        private function setupUploadDir() {
                global $IP;

                if ( $this->keepUploads ) {
                        $dir = wfTempDir() . '/mwParser-images';

                        if ( is_dir( $dir ) ) {
                                return $dir;
                        }
                } else {
                        $dir = wfTempDir() . "/mwParser-" . mt_rand() . "-images";
                }

                // wfDebug( "Creating upload directory $dir\n" );
                if ( file_exists( $dir ) ) {
                        wfDebug( "Already exists!\n" );
                        return $dir;
                }

                wfMkdirParents( $dir . '/3/3a', null, __METHOD__ );
                copy( "$IP/skins/monobook/headbg.jpg", "$dir/3/3a/Foobar.jpg" );
                wfMkdirParents( $dir . '/0/09', null, __METHOD__ );
                copy( "$IP/skins/monobook/headbg.jpg", "$dir/0/09/Bad.jpg" );

                return $dir;
        }

        private function teardownGlobals() {
                RepoGroup::destroySingleton();
                FileBackendGroup::destroySingleton();
                LockManagerGroup::destroySingleton();
                LinkCache::singleton()->clear();

                foreach ( $this->savedGlobals as $var => $val ) {
                        $GLOBALS[$var] = $val;
                }
        }

        private function teardownUploadDir( $dir ) {
                if ( $this->keepUploads ) {
                        return;
                }

                // delete the files first, then the dirs.
                self::deleteFiles(
                        array (
                                "$dir/3/3a/Foobar.jpg",
                                "$dir/thumb/3/3a/Foobar.jpg/180px-Foobar.jpg",
                                "$dir/thumb/3/3a/Foobar.jpg/200px-Foobar.jpg",
                                "$dir/thumb/3/3a/Foobar.jpg/640px-Foobar.jpg",
                                "$dir/thumb/3/3a/Foobar.jpg/120px-Foobar.jpg",

                                "$dir/0/09/Bad.jpg",

                                "$dir/math/f/a/5/fa50b8b616463173474302ca3e63586b.png",
                        )
                );

                self::deleteDirs(
                        array (
                                "$dir/3/3a",
                                "$dir/3",
                                "$dir/thumb/6/65",
                                "$dir/thumb/6",
                                "$dir/thumb/3/3a/Foobar.jpg",
                                "$dir/thumb/3/3a",
                                "$dir/thumb/3",

                                "$dir/0/09/",
                                "$dir/0/",
                                "$dir/thumb",
                                "$dir/math/f/a/5",
                                "$dir/math/f/a",
                                "$dir/math/f",
                                "$dir/math",
                                "$dir",
                        )
                );
        }

        private static function deleteFiles( $files ) {
                foreach ( $files as $file ) {
                        if ( file_exists( $file ) ) {
                                unlink( $file );
                        }
                }
        }

        private static function deleteDirs( $dirs ) {
                foreach ( $dirs as $dir ) {
                        if ( is_dir( $dir ) ) {
                                rmdir( $dir );
                        }
                }
        }

        protected function showTesting( $desc ) {
                print "Running test $desc... ";
        }

        protected function showSuccess( $desc ) {
                if ( $this->showProgress ) {
                        print $this->term->color( '1;32' ) . 'PASSED' . $this->term->reset() . "\n";
                }

                return true;
        }

        protected function showFailure( $desc, $result, $html ) {
                if ( $this->showFailure ) {
                        if ( !$this->showProgress ) {
                                # In quiet mode we didn't show the 'Testing' message before the
                                # test, in case it succeeded. Show it now:
                                $this->showTesting( $desc );
                        }

                        print $this->term->color( '31' ) . 'FAILED!' . $this->term->reset() . "\n";

                        if ( $this->showOutput ) {
                                print "--- Expected ---\n$result\n--- Actual ---\n$html\n";
                        }

                        if ( $this->showDiffs ) {
                                print $this->quickDiff( $result, $html );
                                if ( !$this->wellFormed( $html ) ) {
                                        print "XML error: $this->mXmlError\n";
                                }
                        }
                }

                return false;
        }

        protected function quickDiff( $input, $output, $inFileTail = 'expected', $outFileTail = 'actual' ) {
                # Windows, or at least the fc utility, is retarded
                $slash = wfIsWindows() ? '\\' : '/';
                $prefix = wfTempDir() . "{$slash}mwParser-" . mt_rand();

                $infile = "$prefix-$inFileTail";
                $this->dumpToFile( $input, $infile );

                $outfile = "$prefix-$outFileTail";
                $this->dumpToFile( $output, $outfile );

                $shellInfile = wfEscapeShellArg($infile);
                $shellOutfile = wfEscapeShellArg($outfile);

                global $wgDiff3;
                // we assume that people with diff3 also have usual diff
                $diff = ( wfIsWindows() && !$wgDiff3 )
                        ? `fc $shellInfile $shellOutfile`
                        : `diff -au $shellInfile $shellOutfile`;
                unlink( $infile );
                unlink( $outfile );

                return $this->colorDiff( $diff );
        }

        private function dumpToFile( $data, $filename ) {
                $file = fopen( $filename, "wt" );
                fwrite( $file, $data . "\n" );
                fclose( $file );
        }

        protected function colorDiff( $text ) {
                return preg_replace(
                        array( '/^(-.*)$/m', '/^(\+.*)$/m' ),
                        array( $this->term->color( 34 ) . '$1' . $this->term->reset(),
                                   $this->term->color( 31 ) . '$1' . $this->term->reset() ),
                        $text );
        }

        public function showRunFile( $path ) {
                print $this->term->color( 1 ) .
                        "Reading tests from \"$path\"..." .
                        $this->term->reset() .
                        "\n";
        }

        static public function addArticle( $name, $text, $line = 'unknown', $ignoreDuplicate = '' ) {
                global $wgCapitalLinks;

                $oldCapitalLinks = $wgCapitalLinks;
                $wgCapitalLinks = true; // We only need this from SetupGlobals() See r70917#c8637

                $text = self::chomp( $text );
                $name = self::chomp( $name );

                $title = Title::newFromText( $name );

                if ( is_null( $title ) ) {
                        throw new MWException( "invalid title '$name' at line $line\n" );
                }

                $page = WikiPage::factory( $title );
                $page->loadPageData( 'fromdbmaster' );

                if ( $page->exists() ) {
                        if ( $ignoreDuplicate == 'ignoreduplicate' ) {
                                return;
                        } else {
                                throw new MWException( "duplicate article '$name' at line $line\n" );
                        }
                }

                $page->doEdit( $text, '', EDIT_NEW );

                $wgCapitalLinks = $oldCapitalLinks;
        }

        public function requireHook( $name ) {
                global $wgParser;

                $wgParser->firstCallInit( ); // make sure hooks are loaded.

                if ( isset( $wgParser->mTagHooks[$name] ) ) {
                        $this->hooks[$name] = $wgParser->mTagHooks[$name];
                } else {
                        echo "   This test suite requires the '$name' hook extension, skipping.\n";
                        return false;
                }

                return true;
        }

        public function requireFunctionHook( $name ) {
                global $wgParser;

                $wgParser->firstCallInit( ); // make sure hooks are loaded.

                if ( isset( $wgParser->mFunctionHooks[$name] ) ) {
                        $this->functionHooks[$name] = $wgParser->mFunctionHooks[$name];
                } else {
                        echo "   This test suite requires the '$name' function hook extension, skipping.\n";
                        return false;
                }

                return true;
        }

        private function tidy( $text ) {
                global $wgUseTidy;

                if ( $wgUseTidy ) {
                        $text = MWTidy::tidy( $text );
                }

                return $text;
        }

        private function wellFormed( $text ) {
                $html =
                        Sanitizer::hackDocType() .
                        '<html>' .
                        $text .
                        '</html>';

                $parser = xml_parser_create( "UTF-8" );

                # case folding violates XML standard, turn it off
                xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );

                if ( !xml_parse( $parser, $html, true ) ) {
                        $err = xml_error_string( xml_get_error_code( $parser ) );
                        $position = xml_get_current_byte_index( $parser );
                        $fragment = $this->extractFragment( $html, $position );
                        $this->mXmlError = "$err at byte $position:\n$fragment";
                        xml_parser_free( $parser );

                        return false;
                }

                xml_parser_free( $parser );

                return true;
        }

        private function extractFragment( $text, $position ) {
                $start = max( 0, $position - 10 );
                $before = $position - $start;
                $fragment = '...' .
                        $this->term->color( 34 ) .
                        substr( $text, $start, $before ) .
                        $this->term->color( 0 ) .
                        $this->term->color( 31 ) .
                        $this->term->color( 1 ) .
                        substr( $text, $position, 1 ) .
                        $this->term->color( 0 ) .
                        $this->term->color( 34 ) .
                        substr( $text, $position + 1, 9 ) .
                        $this->term->color( 0 ) .
                        '...';
                $display = str_replace( "\n", ' ', $fragment );
                $caret = '   ' .
                        str_repeat( ' ', $before ) .
                        $this->term->color( 31 ) .
                        '^' .
                        $this->term->color( 0 );

                return "$display\n$caret";
        }

        static function getFakeTimestamp( &$parser, &$ts ) {
                $ts = 123;
                return true;
        }
}