Merge "[FileBackend] Process cache fixes and cleanups."

[mediawiki.git] / tests / phpunit / maintenance / DumpTestCase.php

<?php

/**
 * Base TestCase for dumps
 */
abstract class DumpTestCase extends MediaWikiLangTestCase {

        /**
         * exception to be rethrown once in sound PHPUnit surrounding
         *
         * As the current MediaWikiTestCase::run is not robust enough to recover
         * from thrown exceptions directly, we cannot throw frow within
         * self::addDBData, although it would be appropriate. Hence, we catch the
         * exception and store it until we are in setUp and may finally rethrow
         * the exception without crashing the test suite.
         *
         * @var Exception|null
         */
        protected $exceptionFromAddDBData = null;

        /**
         * Holds the xmlreader used for analyzing an xml dump
         *
         * @var XMLReader|null
         */
        protected $xml = null;

        /**
         * Adds a revision to a page, while returning the resuting revision's id
         *
         * @param $page WikiPage: page to add the revision to
         * @param $text string: revisions text
         * @param $text string: revisions summare
         *
         * @throws MWExcepion
         */
        protected function addRevision( Page $page, $text, $summary ) {
                $status = $page->doEdit( $text, $summary );
                if ( $status->isGood() ) {
                        $value = $status->getValue();
                        $revision = $value['revision'];
                        $revision_id = $revision->getId();
                        $text_id = $revision->getTextId();
                        if ( ( $revision_id > 0 ) && ( $text_id > 0 ) ) {
                                return array( $revision_id, $text_id );
                        }
                }
                throw new MWException( "Could not determine revision id (" . $status->getXML() . ")" );
        }


        /**
         * gunzips the given file and stores the result in the original file name
         *
         * @param $fname string: filename to read the gzipped data from and stored
         *             the gunzipped data into
         */
        protected function gunzip( $fname ) {
                $gzipped_contents = file_get_contents( $fname );
                if ( $gzipped_contents === FALSE ) {
                        $this->fail( "Could not get contents of $fname" );
                }
                // We resort to use gzinflate instead of gzdecode, as gzdecode
                // need not be available
                $contents = gzinflate( substr( $gzipped_contents, 10, -8 ) );
                $this->assertEquals( strlen( $contents ),
                        file_put_contents( $fname, $contents ), "# bytes written" );
        }

        /**
         * Default set up function.
         *
         * Clears $wgUser, and reports errors from addDBData to PHPUnit
         */
        public function setUp() {
                global $wgUser;

                parent::setUp();

                // Check if any Exception is stored for rethrowing from addDBData
                // @see self::exceptionFromAddDBData
                if ( $this->exceptionFromAddDBData !== null ) {
                        throw $this->exceptionFromAddDBData;
                }

                $wgUser = new User();
        }

        /**
         * Checks for test output consisting only of lines containing ETA announcements
         */
        function expectETAOutput() {
                // Newer PHPUnits require assertion about the output using PHPUnit's own
                // expectOutput[...] functions. However, the PHPUnit shipped prediactes
                // do not allow to check /each/ line of the output using /readable/ REs.
                // So we ...
                //
                // 1. ... add a dummy output checking to make PHPUnit not complain
                //    about unchecked test output
                $this->expectOutputRegex( '//' );

                // 2. Do the real output checking on our own.
                $lines = explode( "\n", $this->getActualOutput() );
                $this->assertGreaterThan( 1, count( $lines ), "Minimal lines of produced output" );
                $this->assertEquals( '', array_pop( $lines ), "Output ends in LF" );
                $timestamp_re = "[0-9]{4}-[01][0-9]-[0-3][0-9] [0-2][0-9]:[0-5][0-9]:[0-6][0-9]";
                foreach ( $lines as $line ) {
                        $this->assertRegExp( "/$timestamp_re: .* \(ID [0-9]+\) [0-9]* pages .*, [0-9]* revs .*, ETA/", $line );
                }
        }


        /**
         * Step the current XML reader until node end of given name is found.
         *
         * @param $name string: name of the closing element to look for
         *           (e.g.: "mediawiki" when looking for </mediawiki>)
         *
         * @return bool: true iff the end node could be found. false otherwise.
         */
        protected function skipToNodeEnd( $name ) {
                while ( $this->xml->read() ) {
                        if ( $this->xml->nodeType == XMLReader::END_ELEMENT &&
                                $this->xml->name == $name ) {
                                return true;
                        }
                }
                return false;
        }

        /**
         * Step the current XML reader to the first element start after the node
         * end of a given name.
         *
         * @param $name string: name of the closing element to look for
         *           (e.g.: "mediawiki" when looking for </mediawiki>)
         *
         * @return bool: true iff new element after the closing of $name could be
         *           found. false otherwise.
         */
        protected function skipPastNodeEnd( $name ) {
                $this->assertTrue( $this->skipToNodeEnd( $name ),
                        "Skipping to end of $name" );
                while ( $this->xml->read() ) {
                        if ( $this->xml->nodeType == XMLReader::ELEMENT ) {
                                return true;
                        }
                }
                return false;
        }

        /**
         * Opens an XML file to analyze and optionally skips past siteinfo.
         *
         * @param $fname string: name of file to analyze
         * @param $skip_siteinfo bool: (optional) If true, step the xml reader
         *           to the first element after </siteinfo>
         */
        protected function assertDumpStart( $fname, $skip_siteinfo = true ) {
                $this->xml = new XMLReader();
                $this->assertTrue( $this->xml->open( $fname ),
                        "Opening temporary file $fname via XMLReader failed" );
                if ( $skip_siteinfo ) {
                        $this->assertTrue( $this->skipPastNodeEnd( "siteinfo" ),
                                "Skipping past end of siteinfo" );
                }
        }

        /**
         * Asserts that the xml reader is at the final closing tag of an xml file and
         * closes the reader.
         *
         * @param $tag string: (optional) the name of the final tag
         *           (e.g.: "mediawiki" for </mediawiki>)
         */
        protected function assertDumpEnd( $name = "mediawiki" ) {
                $this->assertNodeEnd( $name, false );
                if ( $this->xml->read() ) {
                        $this->skipWhitespace();
                }
                $this->assertEquals( $this->xml->nodeType, XMLReader::NONE,
                        "No proper entity left to parse" );
                $this->xml->close();
        }

        /**
         * Steps the xml reader over white space
         */
        protected function skipWhitespace() {
                $cont = true;
                while ( $cont && ( ( $this->xml->nodeType == XMLReader::WHITESPACE )
                                || ( $this->xml->nodeType == XMLReader::SIGNIFICANT_WHITESPACE ) ) ) {
                        $cont = $this->xml->read();
                }
        }

        /**
         * Asserts that the xml reader is at an element of given name, and optionally
         * skips past it.
         *
         * @param $name string: the name of the element to check for
         *           (e.g.: "mediawiki" for <mediawiki>)
         * @param $skip bool: (optional) if true, skip past the found element
         */
        protected function assertNodeStart( $name, $skip = true ) {
                $this->assertEquals( $name, $this->xml->name, "Node name" );
                $this->assertEquals( XMLReader::ELEMENT, $this->xml->nodeType, "Node type" );
                if ( $skip ) {
                        $this->assertTrue( $this->xml->read(), "Skipping past start tag" );
                }
        }

        /**
         * Asserts that the xml reader is at an closing element of given name, and optionally
         * skips past it.
         *
         * @param $name string: the name of the closing element to check for
         *           (e.g.: "mediawiki" for </mediawiki>)
         * @param $skip bool: (optional) if true, skip past the found element
         */
        protected function assertNodeEnd( $name, $skip = true ) {
                $this->assertEquals( $name, $this->xml->name, "Node name" );
                $this->assertEquals( XMLReader::END_ELEMENT, $this->xml->nodeType, "Node type" );
                if ( $skip ) {
                        $this->assertTrue( $this->xml->read(), "Skipping past end tag" );
                }
        }


        /**
         * Asserts that the xml reader is at an element of given tag that contains a given text,
         * and skips over the element.
         *
         * @param $name string: the name of the element to check for
         *           (e.g.: "mediawiki" for <mediawiki>...</mediawiki>)
         * @param $text string|false: If string, check if it equals the elements text.
         *           If false, ignore the element's text
         * @param $skip_ws bool: (optional) if true, skip past white spaces that trail the
         *           closing element.
         */
        protected function assertTextNode( $name, $text, $skip_ws = true ) {
                $this->assertNodeStart( $name );

                if ( $text !== false ) {
                        $this->assertEquals( $text, $this->xml->value, "Text of node " . $name );
                }
                $this->assertTrue( $this->xml->read(), "Skipping past processed text of " . $name );
                $this->assertNodeEnd( $name );

                if ( $skip_ws ) {
                        $this->skipWhitespace();
                }
        }

        /**
         * Asserts that the xml reader is at the start of a page element and skips over the first
         * tags, after checking them.
         *
         * Besides the opening page element, this function also checks for and skips over the
         * title, ns, and id tags. Hence after this function, the xml reader is at the first
         * revision of the current page.
         *
         * @param $id int: id of the page to assert
         * @param $ns int: number of namespage to assert
         * @param $name string: title of the current page
         */
        protected function assertPageStart( $id, $ns, $name ) {

                $this->assertNodeStart( "page" );
                $this->skipWhitespace();

                $this->assertTextNode( "title", $name );
                $this->assertTextNode( "ns", $ns );
                $this->assertTextNode( "id", $id );

        }

        /**
         * Asserts that the xml reader is at the page's closing element and skips to the next
         * element.
         */
        protected function assertPageEnd() {
                $this->assertNodeEnd( "page" );
                $this->skipWhitespace();
        }

        /**
         * Asserts that the xml reader is at a revision and checks its representation before
         * skipping over it.
         *
         * @param $id int: id of the revision
         * @param $summary string: summary of the revision
         * @param $text_id int: id of the revision's text
         * @param $text_bytes int: # of bytes in the revision's text
         * @param $text_sha1 string: the base36 SHA-1 of the revision's text
         * @param $text string|false: (optional) The revision's string, or false to check for a
         *            revision stub
         */
        protected function assertRevision( $id, $summary, $text_id, $text_bytes, $text_sha1, $text = false ) {

                $this->assertNodeStart( "revision" );
                $this->skipWhitespace();

                $this->assertTextNode( "id", $id );
                $this->assertTextNode( "timestamp", false );

                $this->assertNodeStart( "contributor" );
                $this->skipWhitespace();
                $this->assertTextNode( "ip", false );
                $this->assertNodeEnd( "contributor" );
                $this->skipWhitespace();

                $this->assertTextNode( "comment", $summary );

                $this->assertTextNode( "sha1", $text_sha1 );

                $this->assertNodeStart( "text", false );
                if ( $text_bytes !== false ) {
                        $this->assertEquals( $this->xml->getAttribute( "bytes" ), $text_bytes,
                                "Attribute 'bytes' of revision " . $id );
                }

                if ( $text === false ) {
                        // Testing for a stub
                        $this->assertEquals( $this->xml->getAttribute( "id" ), $text_id,
                                "Text id of revision " . $id );
                        $this->assertFalse( $this->xml->hasValue, "Revision has text" );
                        $this->assertTrue( $this->xml->read(), "Skipping text start tag" );
                        if ( ( $this->xml->nodeType == XMLReader::END_ELEMENT )
                                && ( $this->xml->name == "text" ) ) {

                                $this->xml->read();
                        }
                        $this->skipWhitespace();
                } else {
                        // Testing for a real dump
                        $this->assertTrue( $this->xml->read(), "Skipping text start tag" );
                        $this->assertEquals( $text, $this->xml->value, "Text of revision " . $id );
                        $this->assertTrue( $this->xml->read(), "Skipping past text" );
                        $this->assertNodeEnd( "text" );
                        $this->skipWhitespace();
                }

                $this->assertNodeEnd( "revision" );
                $this->skipWhitespace();
        }

}