ParserTestRunner.php

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<?php
use MediaWiki\MediaWikiServices;
use Wikimedia\ScopedCallback;

class ParserTestRunner {
    private $useTemporaryTables = true;

    private $setupDone = [
        'staticSetup' => false,
        'perTestSetup' => false,
        'setupDatabase' => false,
        'setDatabase' => false,
        'setupUploads' => false,
    ];

    private $db;

    private $dbClone;

    private $tidySupport;

    private $tidyDriver = null;

    private $recorder;

    private $uploadDir = null;

    private $fileBackendName;

    private $regex;

    private $normalizationFunctions = [];

    public function __construct( TestRecorder $recorder, $options = [] ) {
        $this->recorder = $recorder;

        if ( isset( $options['norm'] ) ) {
            foreach ( $options['norm'] as $func ) {
                if ( in_array( $func, [ 'removeTbody', 'trimWhitespace' ] ) ) {
                    $this->normalizationFunctions[] = $func;
                } else {
                    $this->recorder->warning(
                        "Warning: unknown normalization option \"$func\"\n" );
                }
            }
        }

        if ( isset( $options['regex'] ) && $options['regex'] !== false ) {
            $this->regex = $options['regex'];
        } else {
            # Matches anything
            $this->regex = '//';
        }

        $this->keepUploads = !empty( $options['keep-uploads'] );

        $this->fileBackendName = isset( $options['file-backend'] ) ?
            $options['file-backend'] : false;

        $this->runDisabled = !empty( $options['run-disabled'] );
        $this->runParsoid = !empty( $options['run-parsoid'] );

        $this->tidySupport = new TidySupport( !empty( $options['use-tidy-config'] ) );
        if ( !$this->tidySupport->isEnabled() ) {
            $this->recorder->warning(
                "Warning: tidy is not installed, skipping some tests\n" );
        }

        if ( isset( $options['upload-dir'] ) ) {
            $this->uploadDir = $options['upload-dir'];
        }
    }

    public function getRecorder() {
        return $this->recorder;
    }

    public function staticSetup( $nextTeardown = null ) {
        // A note on coding style:

        // The general idea here is to keep setup code together with
        // corresponding teardown code, in a fine-grained manner. We have two
        // arrays: $setup and $teardown. The code snippets in the $setup array
        // are executed at the end of the method, before it returns, and the
        // code snippets in the $teardown array are executed in reverse order
        // when the Wikimedia\ScopedCallback object is consumed.

        // Because it is a common operation to save, set and restore global
        // variables, we have an additional convention: when the array key of
        // $setup is a string, the string is taken to be the name of the global
        // variable, and the element value is taken to be the desired new value.

        // It's acceptable to just do the setup immediately, instead of adding
        // a closure to $setup, except when the setup action depends on global
        // variable initialisation being done first. In this case, you have to
        // append a closure to $setup after the global variable is appended.

        // When you add to setup functions in this class, please keep associated
        // setup and teardown actions together in the source code, and please
        // add comments explaining why the setup action is necessary.

        $setup = [];
        $teardown = [];

        $teardown[] = $this->markSetupDone( 'staticSetup' );

        // Some settings which influence HTML output
        $setup['wgSitename'] = 'MediaWiki';
        $setup['wgServer'] = 'http://example.org';
        $setup['wgServerName'] = 'example.org';
        $setup['wgScriptPath'] = '';
        $setup['wgScript'] = '/index.php';
        $setup['wgResourceBasePath'] = '';
        $setup['wgStylePath'] = '/skins';
        $setup['wgExtensionAssetsPath'] = '/extensions';
        $setup['wgArticlePath'] = '/wiki/$1';
        $setup['wgActionPaths'] = [];
        $setup['wgVariantArticlePath'] = false;
        $setup['wgUploadNavigationUrl'] = false;
        $setup['wgCapitalLinks'] = true;
        $setup['wgNoFollowLinks'] = true;
        $setup['wgNoFollowDomainExceptions'] = [ 'no-nofollow.org' ];
        $setup['wgExternalLinkTarget'] = false;
        $setup['wgExperimentalHtmlIds'] = false;
        $setup['wgLocaltimezone'] = 'UTC';
        $setup['wgHtml5'] = true;
        $setup['wgDisableLangConversion'] = false;
        $setup['wgDisableTitleConversion'] = false;

        // "extra language links"
        // see https://gerrit.wikimedia.org/r/111390
        $setup['wgExtraInterlanguageLinkPrefixes'] = [ 'mul' ];

        // All FileRepo changes should be done here by injecting services,
        // there should be no need to change global variables.
        RepoGroup::setSingleton( $this->createRepoGroup() );
        $teardown[] = function () {
            RepoGroup::destroySingleton();
        };

        // Set up null lock managers
        $setup['wgLockManagers'] = [ [
            'name' => 'fsLockManager',
            'class' => 'NullLockManager',
        ], [
            'name' => 'nullLockManager',
            'class' => 'NullLockManager',
        ] ];
        $reset = function() {
            LockManagerGroup::destroySingletons();
        };
        $setup[] = $reset;
        $teardown[] = $reset;

        // This allows article insertion into the prefixed DB
        $setup['wgDefaultExternalStore'] = false;

        // This might slightly reduce memory usage
        $setup['wgAdaptiveMessageCache'] = true;

        // This is essential and overrides disabling of database messages in TestSetup
        $setup['wgUseDatabaseMessages'] = true;
        $reset = function () {
            MessageCache::destroyInstance();
        };
        $setup[] = $reset;
        $teardown[] = $reset;

        // It's not necessary to actually convert any files
        $setup['wgSVGConverter'] = 'null';
        $setup['wgSVGConverters'] = [ 'null' => 'echo "1">$output' ];

        // Fake constant timestamp
        Hooks::register( 'ParserGetVariableValueTs', 'ParserTestRunner::getFakeTimestamp' );
        $teardown[] = function () {
            Hooks::clear( 'ParserGetVariableValueTs' );
        };

        $this->appendNamespaceSetup( $setup, $teardown );

        // Set up interwikis and append teardown function
        $teardown[] = $this->setupInterwikis();

        // This affects title normalization in links. It invalidates
        // MediaWikiTitleCodec objects.
        $setup['wgLocalInterwikis'] = [ 'local', 'mi' ];
        $reset = function () {
            $this->resetTitleServices();
        };
        $setup[] = $reset;
        $teardown[] = $reset;

        // Set up a mock MediaHandlerFactory
        MediaWikiServices::getInstance()->disableService( 'MediaHandlerFactory' );
        MediaWikiServices::getInstance()->redefineService(
            'MediaHandlerFactory',
            function() {
                return new MockMediaHandlerFactory();
            }
        );
        $teardown[] = function () {
            MediaWikiServices::getInstance()->resetServiceForTesting( 'MediaHandlerFactory' );
        };

        // 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...
        global $wgObjectCaches;
        $setup['wgObjectCaches'] = [ CACHE_DB => $wgObjectCaches['hash'] ] + $wgObjectCaches;
        if ( isset( ObjectCache::$instances[CACHE_DB] ) ) {
            $savedCache = ObjectCache::$instances[CACHE_DB];
            ObjectCache::$instances[CACHE_DB] = new HashBagOStuff;
            $teardown[] = function () use ( $savedCache ) {
                ObjectCache::$instances[CACHE_DB] = $savedCache;
            };
        }

        $teardown[] = $this->executeSetupSnippets( $setup );

        // Schedule teardown snippets in reverse order
        return $this->createTeardownObject( $teardown, $nextTeardown );
    }

    private function appendNamespaceSetup( &$setup, &$teardown ) {
        // Add a namespace shadowing a interwiki link, to test
        // proper precedence when resolving links. (bug 51680)
        $setup['wgExtraNamespaces'] = [
            100 => 'MemoryAlpha',
            101 => 'MemoryAlpha_talk'
        ];
        // Changing wgExtraNamespaces invalidates caches in MWNamespace and
        // any live Language object, both on setup and teardown
        $reset = function () {
            MWNamespace::getCanonicalNamespaces( true );
            $GLOBALS['wgContLang']->resetNamespaces();
        };
        $setup[] = $reset;
        $teardown[] = $reset;
    }

    protected function createRepoGroup() {
        if ( $this->uploadDir ) {
            if ( $this->fileBackendName ) {
                throw new MWException( 'You cannot specify both use-filebackend and upload-dir' );
            }
            $backend = new FSFileBackend( [
                'name' => 'local-backend',
                'wikiId' => wfWikiID(),
                'basePath' => $this->uploadDir,
                'tmpDirectory' => wfTempDir()
            ] );
        } elseif ( $this->fileBackendName ) {
            global $wgFileBackends;
            $name = $this->fileBackendName;
            $useConfig = false;
            foreach ( $wgFileBackends as $conf ) {
                if ( $conf['name'] === $name ) {
                    $useConfig = $conf;
                }
            }
            if ( $useConfig === false ) {
                throw new MWException( "Unable to find file backend \"$name\"" );
            }
            $useConfig['name'] = 'local-backend'; // swap name
            unset( $useConfig['lockManager'] );
            unset( $useConfig['fileJournal'] );
            $class = $useConfig['class'];
            $backend = new $class( $useConfig );
        } else {
            # Replace with a mock. We do not care about generating real
            # files on the filesystem, just need to expose the file
            # informations.
            $backend = new MockFileBackend( [
                'name' => 'local-backend',
                'wikiId' => wfWikiID()
            ] );
        }

        return new RepoGroup(
            [
                'class' => 'MockLocalRepo',
                'name' => 'local',
                'url' => 'http://example.com/images',
                'hashLevels' => 2,
                'transformVia404' => false,
                'backend' => $backend
            ],
            []
        );
    }

    protected function executeSetupSnippets( $setup ) {
        $saved = [];
        foreach ( $setup as $name => $value ) {
            if ( is_int( $name ) ) {
                $value();
            } else {
                $saved[$name] = isset( $GLOBALS[$name] ) ? $GLOBALS[$name] : null;
                $GLOBALS[$name] = $value;
            }
        }
        return function () use ( $saved ) {
            $this->executeSetupSnippets( $saved );
        };
    }

    protected function createTeardownObject( $teardown, $nextTeardown ) {
        return new ScopedCallback( function() use ( $teardown, $nextTeardown ) {
            // Schedule teardown snippets in reverse order
            $teardown = array_reverse( $teardown );

            $this->executeSetupSnippets( $teardown );
            if ( $nextTeardown ) {
                ScopedCallback::consume( $nextTeardown );
            }
        } );
    }

    protected function markSetupDone( $funcName ) {
        if ( $this->setupDone[$funcName] ) {
            throw new MWException( "$funcName is already done" );
        }
        $this->setupDone[$funcName] = true;
        return function () use ( $funcName ) {
            $this->setupDone[$funcName] = false;
        };
    }

    protected function checkSetupDone( $funcName, $funcName2 = null ) {
        if ( !$this->setupDone[$funcName]
            && ( $funcName === null || !$this->setupDone[$funcName2] )
        ) {
            throw new MWException( "$funcName must be called before calling " .
                wfGetCaller() );
        }
    }

    public function isSetupDone( $funcName ) {
        return isset( $this->setupDone[$funcName] ) ? $this->setupDone[$funcName] : false;
    }

    private function setupInterwikis() {
        # Hack: insert a few Wikipedia in-project interwiki prefixes,
        # for testing inter-language links
        Hooks::register( 'InterwikiLoadPrefix', function ( $prefix, &$iwData ) {
            static $testInterwikis = [
                'local' => [
                    'iw_url' => 'http://doesnt.matter.org/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 0 ],
                'wikipedia' => [
                    'iw_url' => 'http://en.wikipedia.org/wiki/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 0 ],
                'meatball' => [
                    'iw_url' => 'http://www.usemod.com/cgi-bin/mb.pl?$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 0 ],
                'memoryalpha' => [
                    'iw_url' => 'http://www.memory-alpha.org/en/index.php/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 0 ],
                'zh' => [
                    'iw_url' => 'http://zh.wikipedia.org/wiki/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 1 ],
                'es' => [
                    'iw_url' => 'http://es.wikipedia.org/wiki/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 1 ],
                'fr' => [
                    'iw_url' => 'http://fr.wikipedia.org/wiki/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 1 ],
                'ru' => [
                    'iw_url' => 'http://ru.wikipedia.org/wiki/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 1 ],
                'mi' => [
                    'iw_url' => 'http://mi.wikipedia.org/wiki/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 1 ],
                'mul' => [
                    'iw_url' => 'http://wikisource.org/wiki/$1',
                    'iw_api' => '',
                    'iw_wikiid' => '',
                    'iw_local' => 1 ],
            ];
            if ( array_key_exists( $prefix, $testInterwikis ) ) {
                $iwData = $testInterwikis[$prefix];
            }

            // We only want to rely on the above fixtures
            return false;
        } );// hooks::register

        return function () {
            // Tear down
            Hooks::clear( 'InterwikiLoadPrefix' );
        };
    }

    private function resetTitleServices() {
        $services = MediaWikiServices::getInstance();
        $services->resetServiceForTesting( 'TitleFormatter' );
        $services->resetServiceForTesting( 'TitleParser' );
        $services->resetServiceForTesting( '_MediaWikiTitleCodec' );
        $services->resetServiceForTesting( 'LinkRenderer' );
        $services->resetServiceForTesting( 'LinkRendererFactory' );
    }

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

    public function runTestsFromFiles( $filenames ) {
        $ok = false;

        $teardownGuard = $this->staticSetup();
        $teardownGuard = $this->setupDatabase( $teardownGuard );
        $teardownGuard = $this->setupUploads( $teardownGuard );

        $this->recorder->start();
        try {
            $ok = true;

            foreach ( $filenames as $filename ) {
                $testFileInfo = TestFileReader::read( $filename, [
                    'runDisabled' => $this->runDisabled,
                    'runParsoid' => $this->runParsoid,
                    'regex' => $this->regex ] );

                // Don't start the suite if there are no enabled tests in the file
                if ( !$testFileInfo['tests'] ) {
                    continue;
                }

                $this->recorder->startSuite( $filename );
                $ok = $this->runTests( $testFileInfo ) && $ok;
                $this->recorder->endSuite( $filename );
            }

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

        ScopedCallback::consume( $teardownGuard );

        return $ok;
    }

    public function meetsRequirements( $requirements ) {
        foreach ( $requirements as $requirement ) {
            switch ( $requirement['type'] ) {
            case 'hook':
                $ok = $this->requireHook( $requirement['name'] );
                break;
            case 'functionHook':
                $ok = $this->requireFunctionHook( $requirement['name'] );
                break;
            case 'transparentHook':
                $ok = $this->requireTransparentHook( $requirement['name'] );
                break;
            }
            if ( !$ok ) {
                return false;
            }
        }
        return true;
    }

    public function runTests( $testFileInfo ) {
        $ok = true;

        $this->checkSetupDone( 'staticSetup' );

        // Don't add articles from the file if there are no enabled tests from the file
        if ( !$testFileInfo['tests'] ) {
            return true;
        }

        // If any requirements are not met, mark all tests from the file as skipped
        if ( !$this->meetsRequirements( $testFileInfo['requirements'] ) ) {
            foreach ( $testFileInfo['tests'] as $test ) {
                $this->recorder->startTest( $test );
                $this->recorder->skipped( $test, 'required extension not enabled' );
            }
            return true;
        }

        // Add articles
        $this->addArticles( $testFileInfo['articles'] );

        // Run tests
        foreach ( $testFileInfo['tests'] as $test ) {
            $this->recorder->startTest( $test );
            $result =
                $this->runTest( $test );
            if ( $result !== false ) {
                $ok = $ok && $result->isSuccess();
                $this->recorder->record( $test, $result );
            }
        }

        return $ok;
    }

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

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

        return $parser;
    }

    public function runTest( $test ) {
        wfDebug( __METHOD__.": running {$test['desc']}" );
        $opts = $this->parseOptions( $test['options'] );
        $teardownGuard = $this->perTestSetup( $test );

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

        if ( isset( $opts['tidy'] ) ) {
            if ( !$this->tidySupport->isEnabled() ) {
                $this->recorder->skipped( $test, 'tidy extension is not installed' );
                return false;
            } else {
                $options->setTidy( true );
            }
        }

        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( $test['input'], $title, $user, $options );
        } elseif ( isset( $opts['msg'] ) ) {
            $out = $parser->transformMsg( $test['input'], $options, $title );
        } elseif ( isset( $opts['section'] ) ) {
            $section = $opts['section'];
            $out = $parser->getSection( $test['input'], $section );
        } elseif ( isset( $opts['replace'] ) ) {
            $section = $opts['replace'][0];
            $replace = $opts['replace'][1];
            $out = $parser->replaceSection( $test['input'], $section, $replace );
        } elseif ( isset( $opts['comment'] ) ) {
            $out = Linker::formatComment( $test['input'], $title, $local );
        } elseif ( isset( $opts['preload'] ) ) {
            $out = $parser->getPreloadText( $test['input'], $title, $options );
        } else {
            $output = $parser->parse( $test['input'], $title, $options, true, true, 1337 );
            $output->setTOCEnabled( !isset( $opts['notoc'] ) );
            $out = $output->getText();
            if ( isset( $opts['tidy'] ) ) {
                $out = preg_replace( '/\s+$/', '', $out );
            }

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

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

            if ( isset( $opts['showindicators'] ) ) {
                $indicators = '';
                foreach ( $output->getIndicators() as $id => $content ) {
                    $indicators .= "$id=$content\n";
                }
                $out = $indicators . $out;
            }

            if ( isset( $opts['ill'] ) ) {
                $out = implode( ' ', $output->getLanguageLinks() );
            } elseif ( isset( $opts['cat'] ) ) {
                $out = '';
                foreach ( $output->getCategories() as $name => $sortkey ) {
                    if ( $out !== '' ) {
                        $out .= "\n";
                    }
                    $out .= "cat=$name sort=$sortkey";
                }
            }
        }

        ScopedCallback::consume( $teardownGuard );

        $expected = $test['result'];
        if ( count( $this->normalizationFunctions ) ) {
            $expected = ParserTestResultNormalizer::normalize(
                $test['expected'], $this->normalizationFunctions );
            $out = ParserTestResultNormalizer::normalize( $out, $this->normalizationFunctions );
        }

        $testResult = new ParserTestResult( $test, $expected, $out );
        return $testResult;
    }

    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 = [];
        // foo
        // foo=bar
        // foo="bar baz"
        // foo=[[bar baz]]
        // foo=bar,"baz quux"
        // foo={...json...}
        $defs = '(?(DEFINE)
            (?<qstr>                    # Quoted string
                "
                (?:[^\\\\"] | \\\\.)*
                "
            )
            (?<json>
                \{      # Open bracket
                (?:
                    [^"{}] |                # Not a quoted string or object, or
                    (?&qstr) |              # A quoted string, or
                    (?&json)                # A json object (recursively)
                )*
                \}      # Close bracket
            )
            (?<value>
                (?:
                    (?&qstr)            # Quoted val
                |
                    \[\[
                        [^]]*           # Link target
                    \]\]
                |
                    [\w-]+              # Plain word
                |
                    (?&json)            # JSON object
                )
            )
        )';
        $regex = '/' . $defs . '\b
            (?<k>[\w-]+)                # Key
            \b
            (?:\s*
                =                       # First sub-value
                \s*
                (?<v>
                    (?&value)
                    (?:\s*
                        ,               # Sub-vals 1..N
                        \s*
                        (?&value)
                    )*
                )
            )?
            /x';
        $valueregex = '/' . $defs . '(?&value)/x';

        if ( preg_match_all( $regex, $instring, $matches, PREG_SET_ORDER ) ) {
            foreach ( $matches as $bits ) {
                $key = strtolower( $bits['k'] );
                if ( !isset( $bits['v'] ) ) {
                    $opts[$key] = true;
                } else {
                    preg_match_all( $valueregex, $bits['v'], $vmatches );
                    $opts[$key] = array_map( [ $this, 'cleanupOption' ], $vmatches[0] );
                    if ( count( $opts[$key] ) == 1 ) {
                        $opts[$key] = $opts[$key][0];
                    }
                }
            }
        }
        return $opts;
    }

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

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

        if ( substr( $opt, 0, 1 ) == '{' ) {
            return FormatJson::decode( $opt, true );
        }
        return $opt;
    }

    public function perTestSetup( $test, $nextTeardown = null ) {
        $teardown = [];

        $this->checkSetupDone( 'setupDatabase', 'setDatabase' );
        $teardown[] = $this->markSetupDone( 'perTestSetup' );

        $opts = $this->parseOptions( $test['options'] );
        $config = $test['config'];

        // Find out values for some special options.
        $langCode =
            self::getOptionValue( 'language', $opts, 'en' );
        $variant =
            self::getOptionValue( 'variant', $opts, false );
        $maxtoclevel =
            self::getOptionValue( 'wgMaxTocLevel', $opts, 999 );
        $linkHolderBatchSize =
            self::getOptionValue( 'wgLinkHolderBatchSize', $opts, 1000 );

        $setup = [
            'wgEnableUploads' => self::getOptionValue( 'wgEnableUploads', $opts, true ),
            'wgLanguageCode' => $langCode,
            'wgRawHtml' => self::getOptionValue( 'wgRawHtml', $opts, false ),
            'wgNamespacesWithSubpages' => [ 0 => isset( $opts['subpage'] ) ],
            'wgMaxTocLevel' => $maxtoclevel,
            'wgAllowExternalImages' => self::getOptionValue( 'wgAllowExternalImages', $opts, true ),
            'wgThumbLimits' => [ self::getOptionValue( 'thumbsize', $opts, 180 ) ],
            'wgDefaultLanguageVariant' => $variant,
            'wgLinkHolderBatchSize' => $linkHolderBatchSize,
            // Set as a JSON object like:
            // wgEnableMagicLinks={"ISBN":false, "PMID":false, "RFC":false}
            'wgEnableMagicLinks' => self::getOptionValue( 'wgEnableMagicLinks', $opts, [] )
                + [ 'ISBN' => true, 'PMID' => true, 'RFC' => true ],
        ];

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

            foreach ( $configLines as $line ) {
                list( $var, $value )  = explode( '=', $line, 2 );
                $setup[$var] = eval( "return $value;" );
            }
        }

        Hooks::run( 'ParserTestGlobals', [ &$setup ] );

        // Create tidy driver
        if ( isset( $opts['tidy'] ) ) {
            // Cache a driver instance
            if ( $this->tidyDriver === null ) {
                $this->tidyDriver = MWTidy::factory( $this->tidySupport->getConfig() );
            }
            $tidy = $this->tidyDriver;
        } else {
            $tidy = false;
        }
        MWTidy::setInstance( $tidy );
        $teardown[] = function () {
            MWTidy::destroySingleton();
        };

        // Set content language. This invalidates the magic word cache and title services
        $lang = Language::factory( $langCode );
        $setup['wgContLang'] = $lang;
        $reset = function () {
            MagicWord::clearCache();
            $this->resetTitleServices();
        };
        $setup[] = $reset;
        $teardown[] = $reset;

        // Make a user object with the same language
        $user = new User;
        $user->setOption( 'language', $langCode );
        $setup['wgLang'] = $lang;

        // We (re)set $wgThumbLimits to a single-element array above.
        $user->setOption( 'thumbsize', 0 );

        $setup['wgUser'] = $user;

        // And put both user and language into the context
        $context = RequestContext::getMain();
        $context->setUser( $user );
        $context->setLanguage( $lang );
        $teardown[] = function () use ( $context ) {
            // Reset context to the restored globals
            $context->setUser( $GLOBALS['wgUser'] );
            $context->setLanguage( $GLOBALS['wgContLang'] );
        };

        $teardown[] = $this->executeSetupSnippets( $setup );

        return $this->createTeardownObject( $teardown, $nextTeardown );
    }

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

        if ( in_array( $this->db->getType(), [ '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.
        Hooks::run( 'ParserTestTables', [ &$tables ] );

        return $tables;
    }

    public function setDatabase( IDatabase $db ) {
        $this->db = $db;
        $this->setupDone['setDatabase'] = true;
    }

    public function setupDatabase( $nextTeardown = null ) {
        global $wgDBprefix;

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

        if ( $dbType == 'oracle' ) {
            $suspiciousPrefixes = [ 'pt_', MediaWikiTestCase::ORA_DB_PREFIX ];
        } else {
            $suspiciousPrefixes = [ 'parsertest_', MediaWikiTestCase::DB_PREFIX ];
        }
        if ( in_array( $wgDBprefix, $suspiciousPrefixes ) ) {
            throw new MWException( "\$wgDBprefix=$wgDBprefix suggests DB setup is already done" );
        }

        $teardown = [];

        $teardown[] = $this->markSetupDone( 'setupDatabase' );

        # 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', [
                'user_id' => 0,
                'user_name' => 'Anonymous' ] );
        }

        $teardown[] = function () {
            $this->teardownDatabase();
        };

        // Wipe some DB query result caches on setup and teardown
        $reset = function () {
            LinkCache::singleton()->clear();

            // Clear the message cache
            MessageCache::singleton()->clear();
        };
        $reset();
        $teardown[] = $reset;
        return $this->createTeardownObject( $teardown, $nextTeardown );
    }

    public function setupUploads( $nextTeardown = null ) {
        $teardown = [];

        $this->checkSetupDone( 'setupDatabase', 'setDatabase' );
        $teardown[] = $this->markSetupDone( 'setupUploads' );

        // Create the files in the upload directory (or pretend to create them
        // in a MockFileBackend). Append teardown callback.
        $teardown[] = $this->setupUploadBackend();

        // Create a user
        $user = User::createNew( 'WikiSysop' );

        // Register the uploads in the database

        $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Foobar.jpg' ) );
        # note that the size/width/height/bits/etc of the file
        # are actually set by inspecting the file itself; the arguments
        # to recordUpload2 have no effect.  That said, we try to make things
        # match up so it is less confusing to readers of the code & tests.
        $image->recordUpload2( '', 'Upload of some lame file', 'Some lame file', [
            'size' => 7881,
            'width' => 1941,
            'height' => 220,
            'bits' => 8,
            'media_type' => MEDIATYPE_BITMAP,
            'mime' => 'image/jpeg',
            'metadata' => serialize( [] ),
            'sha1' => Wikimedia\base_convert( '1', 16, 36, 31 ),
            'fileExists' => true
        ], $this->db->timestamp( '20010115123500' ), $user );

        $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Thumb.png' ) );
        # again, note that size/width/height below are ignored; see above.
        $image->recordUpload2( '', 'Upload of some lame thumbnail', 'Some lame thumbnail', [
            'size' => 22589,
            'width' => 135,
            'height' => 135,
            'bits' => 8,
            'media_type' => MEDIATYPE_BITMAP,
            'mime' => 'image/png',
            'metadata' => serialize( [] ),
            'sha1' => Wikimedia\base_convert( '2', 16, 36, 31 ),
            'fileExists' => true
        ], $this->db->timestamp( '20130225203040' ), $user );

        $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Foobar.svg' ) );
        $image->recordUpload2( '', 'Upload of some lame SVG', 'Some lame SVG', [
                'size'        => 12345,
                'width'       => 240,
                'height'      => 180,
                'bits'        => 0,
                'media_type'  => MEDIATYPE_DRAWING,
                'mime'        => 'image/svg+xml',
                'metadata'    => serialize( [] ),
                'sha1'        => Wikimedia\base_convert( '', 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', [
            'size' => 12345,
            'width' => 320,
            'height' => 240,
            'bits' => 24,
            'media_type' => MEDIATYPE_BITMAP,
            'mime' => 'image/jpeg',
            'metadata' => serialize( [] ),
            'sha1' => Wikimedia\base_convert( '3', 16, 36, 31 ),
            'fileExists' => true
        ], $this->db->timestamp( '20010115123500' ), $user );

        $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Video.ogv' ) );
        $image->recordUpload2( '', 'A pretty movie', 'Will it play', [
            'size' => 12345,
            'width' => 320,
            'height' => 240,
            'bits' => 0,
            'media_type' => MEDIATYPE_VIDEO,
            'mime' => 'application/ogg',
            'metadata' => serialize( [] ),
            'sha1' => Wikimedia\base_convert( '', 16, 36, 31 ),
            'fileExists' => true
        ], $this->db->timestamp( '20010115123500' ), $user );

        $image = wfLocalFile( Title::makeTitle( NS_FILE, 'Audio.oga' ) );
        $image->recordUpload2( '', 'An awesome hitsong', 'Will it play', [
            'size' => 12345,
            'width' => 0,
            'height' => 0,
            'bits' => 0,
            'media_type' => MEDIATYPE_AUDIO,
            'mime' => 'application/ogg',
            'metadata' => serialize( [] ),
            'sha1' => Wikimedia\base_convert( '', 16, 36, 31 ),
            'fileExists' => true
        ], $this->db->timestamp( '20010115123500' ), $user );

        # A DjVu file
        $image = wfLocalFile( Title::makeTitle( NS_FILE, 'LoremIpsum.djvu' ) );
        $image->recordUpload2( '', 'Upload a DjVu', 'A DjVu', [
            'size' => 3249,
            'width' => 2480,
            'height' => 3508,
            'bits' => 0,
            'media_type' => MEDIATYPE_BITMAP,
            'mime' => 'image/vnd.djvu',
            'metadata' => '<?xml version="1.0" ?>
<!DOCTYPE DjVuXML PUBLIC "-//W3C//DTD DjVuXML 1.1//EN" "pubtext/DjVuXML-s.dtd">
<DjVuXML>
<HEAD></HEAD>
<BODY><OBJECT height="3508" width="2480">
<PARAM name="DPI" value="300" />
<PARAM name="GAMMA" value="2.2" />
</OBJECT>
<OBJECT height="3508" width="2480">
<PARAM name="DPI" value="300" />
<PARAM name="GAMMA" value="2.2" />
</OBJECT>
<OBJECT height="3508" width="2480">
<PARAM name="DPI" value="300" />
<PARAM name="GAMMA" value="2.2" />
</OBJECT>
<OBJECT height="3508" width="2480">
<PARAM name="DPI" value="300" />
<PARAM name="GAMMA" value="2.2" />
</OBJECT>
<OBJECT height="3508" width="2480">
<PARAM name="DPI" value="300" />
<PARAM name="GAMMA" value="2.2" />
</OBJECT>
</BODY>
</DjVuXML>',
            'sha1' => Wikimedia\base_convert( '', 16, 36, 31 ),
            'fileExists' => true
        ], $this->db->timestamp( '20010115123600' ), $user );

        return $this->createTeardownObject( $teardown, $nextTeardown );
    }

    private function teardownDatabase() {
        $this->checkSetupDone( 'setupDatabase' );

        $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
            return;
        }

        $tables = $this->listTables();

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

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

    private function setupUploadBackend() {
        global $IP;

        $repo = RepoGroup::singleton()->getLocalRepo();
        $base = $repo->getZonePath( 'public' );
        $backend = $repo->getBackend();
        $backend->prepare( [ 'dir' => "$base/3/3a" ] );
        $backend->store( [
            'src' => "$IP/tests/phpunit/data/parser/headbg.jpg",
            'dst' => "$base/3/3a/Foobar.jpg"
        ] );
        $backend->prepare( [ 'dir' => "$base/e/ea" ] );
        $backend->store( [
            'src' => "$IP/tests/phpunit/data/parser/wiki.png",
            'dst' => "$base/e/ea/Thumb.png"
        ] );
        $backend->prepare( [ 'dir' => "$base/0/09" ] );
        $backend->store( [
            'src' => "$IP/tests/phpunit/data/parser/headbg.jpg",
            'dst' => "$base/0/09/Bad.jpg"
        ] );
        $backend->prepare( [ 'dir' => "$base/5/5f" ] );
        $backend->store( [
            'src' => "$IP/tests/phpunit/data/parser/LoremIpsum.djvu",
            'dst' => "$base/5/5f/LoremIpsum.djvu"
        ] );

        // No helpful SVG file to copy, so make one ourselves
        $data = '<?xml version="1.0" encoding="utf-8"?>' .
            '<svg xmlns="http://www.w3.org/2000/svg"' .
            ' version="1.1" width="240" height="180"/>';

        $backend->prepare( [ 'dir' => "$base/f/ff" ] );
        $backend->quickCreate( [
            'content' => $data, 'dst' => "$base/f/ff/Foobar.svg"
        ] );

        return function () use ( $backend ) {
            if ( $backend instanceof MockFileBackend ) {
                // In memory backend, so dont bother cleaning them up.
                return;
            }
            $this->teardownUploadBackend();
        };
    }

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

        $repo = RepoGroup::singleton()->getLocalRepo();
        $public = $repo->getZonePath( 'public' );

        $this->deleteFiles(
            [
                "$public/3/3a/Foobar.jpg",
                "$public/e/ea/Thumb.png",
                "$public/0/09/Bad.jpg",
                "$public/5/5f/LoremIpsum.djvu",
                "$public/f/ff/Foobar.svg",
                "$public/0/00/Video.ogv",
                "$public/4/41/Audio.oga",
            ]
        );
    }

    private function deleteFiles( $files ) {
        // Delete the files
        $backend = RepoGroup::singleton()->getLocalRepo()->getBackend();
        foreach ( $files as $file ) {
            $backend->delete( [ 'src' => $file ], [ 'force' => 1 ] );
        }

        // Delete the parent directories
        foreach ( $files as $file ) {
            $tmp = FileBackend::parentStoragePath( $file );
            while ( $tmp ) {
                if ( !$backend->clean( [ 'dir' => $tmp ] )->isOK() ) {
                    break;
                }
                $tmp = FileBackend::parentStoragePath( $tmp );
            }
        }
    }

    public function addArticles( $articles ) {
        global $wgContLang;
        $setup = [];
        $teardown = [];

        // Be sure ParserTestRunner::addArticle has correct language set,
        // so that system messages get into the right language cache
        if ( $wgContLang->getCode() !== 'en' ) {
            $setup['wgLanguageCode'] = 'en';
            $setup['wgContLang'] = Language::factory( 'en' );
        }

        // Add special namespaces, in case that hasn't been done by staticSetup() yet
        $this->appendNamespaceSetup( $setup, $teardown );

        // wgCapitalLinks obviously needs initialisation
        $setup['wgCapitalLinks'] = true;

        $teardown[] = $this->executeSetupSnippets( $setup );

        foreach ( $articles as $info ) {
            $this->addArticle( $info['name'], $info['text'], $info['file'], $info['line'] );
        }

        // Wipe WANObjectCache process cache, which is invalidated by article insertion
        // due to T144706
        ObjectCache::getMainWANInstance()->clearProcessCache();

        $this->executeSetupSnippets( $teardown );
    }

    private function addArticle( $name, $text, $file, $line ) {
        $text = self::chomp( $text );
        $name = self::chomp( $name );

        $title = Title::newFromText( $name );
        wfDebug( __METHOD__ . ": adding $name" );

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

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

        if ( $page->exists() ) {
            throw new MWException( "duplicate article '$name' at $file:$line\n" );
        }

        $status = $page->doEditContent( ContentHandler::makeContent( $text, $title ), '', EDIT_NEW );
        if ( !$status->isOK() ) {
            throw new MWException( $status->getWikiText( false, false, 'en' ) );
        }

        // The RepoGroup cache is invalidated by the creation of file redirects
        if ( $title->inNamespace( NS_FILE ) ) {
            RepoGroup::singleton()->clearCache( $title );
        }
    }

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

        $wgParser->firstCallInit(); // make sure hooks are loaded.
        if ( isset( $wgParser->mTagHooks[$name] ) ) {
            return true;
        } else {
            $this->recorder->warning( "   This test suite requires the '$name' hook " .
                "extension, skipping." );
            return false;
        }
    }

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

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

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

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

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

        if ( isset( $wgParser->mTransparentTagHooks[$name] ) ) {
            return true;
        } else {
            $this->recorder->warning( "   This test suite requires the '$name' transparent " .
                "hook extension, skipping.\n" );
            return false;
        }
    }

    static function getFakeTimestamp( &$parser, &$ts ) {
        $ts = 123; // parsed as '1970-01-01T00:02:03Z'
        return true;
    }
}