backupTextPassTest.php

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<?php

require_once __DIR__ . "/../../../maintenance/backupTextPass.inc";

class TextPassDumperTest extends DumpTestCase {

        // We'll add several pages, revision and texts. The following variables hold the
        // corresponding ids.
        private $pageId1, $pageId2, $pageId3, $pageId4;
        private static $numOfPages = 4;
        private $revId1_1, $textId1_1;
        private $revId2_1, $textId2_1, $revId2_2, $textId2_2;
        private $revId2_3, $textId2_3, $revId2_4, $textId2_4;
        private $revId3_1, $textId3_1, $revId3_2, $textId3_2;
        private $revId4_1, $textId4_1;
        private static $numOfRevs = 8;

        function addDBData() {
                $this->tablesUsed[] = 'page';
                $this->tablesUsed[] = 'revision';
                $this->tablesUsed[] = 'text';

                try {
                        // Simple page
                        $title = Title::newFromText( 'BackupDumperTestP1' );
                        $page = WikiPage::factory( $title );
                        list( $this->revId1_1, $this->textId1_1 ) = $this->addRevision( $page,
                                "BackupDumperTestP1Text1", "BackupDumperTestP1Summary1" );
                        $this->pageId1 = $page->getId();

                        // Page with more than one revision
                        $title = Title::newFromText( 'BackupDumperTestP2' );
                        $page = WikiPage::factory( $title );
                        list( $this->revId2_1, $this->textId2_1 ) = $this->addRevision( $page,
                                "BackupDumperTestP2Text1", "BackupDumperTestP2Summary1" );
                        list( $this->revId2_2, $this->textId2_2 ) = $this->addRevision( $page,
                                "BackupDumperTestP2Text2", "BackupDumperTestP2Summary2" );
                        list( $this->revId2_3, $this->textId2_3 ) = $this->addRevision( $page,
                                "BackupDumperTestP2Text3", "BackupDumperTestP2Summary3" );
                        list( $this->revId2_4, $this->textId2_4 ) = $this->addRevision( $page,
                                "BackupDumperTestP2Text4 some additional Text  ",
                                "BackupDumperTestP2Summary4 extra " );
                        $this->pageId2 = $page->getId();

                        // Deleted page.
                        $title = Title::newFromText( 'BackupDumperTestP3' );
                        $page = WikiPage::factory( $title );
                        list( $this->revId3_1, $this->textId3_1 ) = $this->addRevision( $page,
                                "BackupDumperTestP3Text1", "BackupDumperTestP2Summary1" );
                        list( $this->revId3_2, $this->textId3_2 ) = $this->addRevision( $page,
                                "BackupDumperTestP3Text2", "BackupDumperTestP2Summary2" );
                        $this->pageId3 = $page->getId();
                        $page->doDeleteArticle( "Testing ;)" );

                        // Page from non-default namespace
                        $title = Title::newFromText( 'BackupDumperTestP1', NS_TALK );
                        $page = WikiPage::factory( $title );
                        list( $this->revId4_1, $this->textId4_1 ) = $this->addRevision( $page,
                                "Talk about BackupDumperTestP1 Text1",
                                "Talk BackupDumperTestP1 Summary1" );
                        $this->pageId4 = $page->getId();
                } catch ( Exception $e ) {
                        // We'd love to pass $e directly. However, ... see
                        // documentation of exceptionFromAddDBData in
                        // DumpTestCase
                        $this->exceptionFromAddDBData = $e;
                }

        }

        public function setUp() {
                parent::setUp();

                // Since we will restrict dumping by page ranges (to allow
                // working tests, even if the db gets prepopulated by a base
                // class), we have to assert, that the page id are consecutively
                // increasing
                $this->assertEquals(
                        array( $this->pageId2, $this->pageId3, $this->pageId4 ),
                        array( $this->pageId1 + 1, $this->pageId2 + 1, $this->pageId3 + 1 ),
                        "Page ids increasing without holes" );

        }

        function testPlain() {
                // Setting up the dump
                $nameStub = $this->setUpStub();
                $nameFull = $this->getNewTempFile();
                $dumper = new TextPassDumper( array ( "--stub=file:" . $nameStub,
                                "--output=file:" . $nameFull ) );
                $dumper->reporting = false;
                $dumper->setDb( $this->db );

                // Performing the dump
                $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );

                // Checking for correctness of the dumped data
                $this->assertDumpStart( $nameFull );

                // Page 1
                $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
                $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
                        $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
                        "BackupDumperTestP1Text1" );
                $this->assertPageEnd();

                // Page 2
                $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
                $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
                        $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
                        "BackupDumperTestP2Text1" );
                $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
                        $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
                        "BackupDumperTestP2Text2", $this->revId2_1 );
                $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
                        $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
                        "BackupDumperTestP2Text3", $this->revId2_2 );
                $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
                        $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
                        "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
                $this->assertPageEnd();

                // Page 3
                // -> Page is marked deleted. Hence not visible

                // Page 4
                $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
                $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
                        $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
                        "Talk about BackupDumperTestP1 Text1" );
                $this->assertPageEnd();

                $this->assertDumpEnd();
        }

        function testPrefetchPlain() {
                // The mapping between ids and text, for the hits of the prefetch mock
                $prefetchMap = array(
                        array( $this->pageId1, $this->revId1_1, "Prefetch_________1Text1" ),
                        array( $this->pageId2, $this->revId2_3, "Prefetch_________2Text3" )
                );

                // The mock itself
                $prefetchMock = $this->getMock( 'BaseDump', array( 'prefetch' ), array(), '', FALSE );
                $prefetchMock->expects( $this->exactly( 6 ) )
                        ->method( 'prefetch' )
                        ->will( $this->returnValueMap( $prefetchMap ) );

                // Setting up of the dump
                $nameStub = $this->setUpStub();
                $nameFull = $this->getNewTempFile();
                $dumper = new TextPassDumper( array ( "--stub=file:"
                                . $nameStub, "--output=file:" . $nameFull ) );
                $dumper->prefetch = $prefetchMock;
                $dumper->reporting = false;
                $dumper->setDb( $this->db );

                // Performing the dump
                $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );

                // Checking for correctness of the dumped data
                $this->assertDumpStart( $nameFull );

                // Page 1
                $this->assertPageStart( $this->pageId1, NS_MAIN, "BackupDumperTestP1" );
                // Prefetch kicks in. This is still the SHA-1 of the original text,
                // But the actual text (with different SHA-1) comes from prefetch.
                $this->assertRevision( $this->revId1_1, "BackupDumperTestP1Summary1",
                        $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
                        "Prefetch_________1Text1" );
                $this->assertPageEnd();

                // Page 2
                $this->assertPageStart( $this->pageId2, NS_MAIN, "BackupDumperTestP2" );
                $this->assertRevision( $this->revId2_1, "BackupDumperTestP2Summary1",
                        $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
                        "BackupDumperTestP2Text1" );
                $this->assertRevision( $this->revId2_2, "BackupDumperTestP2Summary2",
                        $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
                        "BackupDumperTestP2Text2", $this->revId2_1 );
                // Prefetch kicks in. This is still the SHA-1 of the original text,
                // But the actual text (with different SHA-1) comes from prefetch.
                $this->assertRevision( $this->revId2_3, "BackupDumperTestP2Summary3",
                        $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
                        "Prefetch_________2Text3", $this->revId2_2 );
                $this->assertRevision( $this->revId2_4, "BackupDumperTestP2Summary4 extra",
                        $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
                        "BackupDumperTestP2Text4 some additional Text", $this->revId2_3 );
                $this->assertPageEnd();

                // Page 3
                // -> Page is marked deleted. Hence not visible

                // Page 4
                $this->assertPageStart( $this->pageId4, NS_TALK, "Talk:BackupDumperTestP1" );
                $this->assertRevision( $this->revId4_1, "Talk BackupDumperTestP1 Summary1",
                        $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
                        "Talk about BackupDumperTestP1 Text1" );
                $this->assertPageEnd();

                $this->assertDumpEnd();

        }

        private function checkpointHelper( $checkpointFormat = "file" ) {
                // Getting temporary names
                $nameStub = $this->getNewTempFile();
                $nameOutputDir = $this->getNewTempDirectory();

                $stderr = fopen( 'php://output', 'a' );
                if ( $stderr === FALSE ) {
                        $this->fail( "Could not open stream for stderr" );
                }

                $iterations = 32; // We'll start with that many iterations of revisions in stub
                $lastDuration = 0;
                $minDuration = 2; // We want the dump to take at least this many seconds
                $checkpointAfter = 0.5; // Generate checkpoint after this many seconds


                // Until a dump takes at least $minDuration seconds, perform a dump and check
                // duration. If the dump did not take long enough increase the iteration
                // count, to generate a bigger stub file next time.
                while ( $lastDuration < $minDuration ) {

                        // Setting up the dump
                        wfRecursiveRemoveDir( $nameOutputDir );
                        $this->assertTrue( wfMkdirParents( $nameOutputDir ),
                                "Creating temporary output directory " );
                        $this->setUpStub( $nameStub, $iterations );
                        $dumper = new TextPassDumper( array ( "--stub=file:" . $nameStub,
                                        "--output=" . $checkpointFormat . ":" . $nameOutputDir . "/full",
                                        "--maxtime=1" /*This is in minutes. Fixup is below*/,
                                        "--checkpointfile=checkpoint-%s-%s.xml.gz" ) );
                        $dumper->setDb( $this->db );
                        $dumper->maxTimeAllowed = $checkpointAfter; // Patching maxTime from 1 minute
                        $dumper->stderr = $stderr;

                        // The actual dump and taking time
                        $ts_before = microtime( true );
                        $dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
                        $ts_after = microtime( true );
                        $lastDuration = $ts_after - $ts_before;

                        // Handling increasing the iteration count for the stubs
                        if ( $lastDuration < $minDuration ) {
                                $old_iterations = $iterations;
                                if ( $lastDuration > 0.2 ) {
                                        // lastDuration is big enough, to allow an educated guess
                                        $factor = ( $minDuration + 0.5 ) / $lastDuration;
                                        if ( ( $factor > 1.1 ) && ( $factor < 100 ) ) {
                                                // educated guess is reasonable
                                                $iterations = (int)( $iterations * $factor );
                                        }
                                }

                                if ( $old_iterations == $iterations ) {
                                        // Heuristics were not applied, so we just *2.
                                        $iterations *= 2;
                                }

                                $this->assertLessThan( 50000, $iterations,
                                        "Emergency stop against infinitely increasing iteration "
                                        . "count ( last duration: $lastDuration )" );
                        }
                }

                // The dump (hopefully) did take long enough to produce more than one
                // checkpoint file.
                //
                // We now check all the checkpoint files for validity.

                $files = scandir( $nameOutputDir );
                $this->assertTrue( asort( $files ), "Sorting files in temporary directory" );
                $fileOpened = false;
                $lookingForPage = 1;
                $checkpointFiles = 0;

                // Each run of the following loop body tries to handle exactly 1 /page/ (not
                // iteration of stub content). $i is only increased after having treated page 4.
                for ( $i = 0 ; $i < $iterations ; ) {

                        // 1. Assuring a file is opened and ready. Skipping across header if
                        //    necessary.
                        if ( ! $fileOpened ) {
                                $this->assertNotEmpty( $files, "No more existing dump files, "
                                        . "but not yet all pages found" );
                                $fname = array_shift( $files );
                                while ( $fname == "." || $fname == ".." ) {
                                        $this->assertNotEmpty( $files, "No more existing dump"
                                                . " files, but not yet all pages found" );
                                        $fname = array_shift( $files );
                                }
                                if ( $checkpointFormat == "gzip" ) {
                                        $this->gunzip( $nameOutputDir . "/" . $fname );
                                }
                                $this->assertDumpStart( $nameOutputDir . "/" . $fname );
                                $fileOpened = true;
                                $checkpointFiles++;
                        }

                        // 2. Performing a single page check
                        switch ( $lookingForPage ) {
                        case 1:
                                // Page 1
                                $this->assertPageStart( $this->pageId1 + $i * self::$numOfPages, NS_MAIN,
                                        "BackupDumperTestP1" );
                                $this->assertRevision( $this->revId1_1 + $i * self::$numOfRevs, "BackupDumperTestP1Summary1",
                                        $this->textId1_1, false, "0bolhl6ol7i6x0e7yq91gxgaan39j87",
                                        "BackupDumperTestP1Text1" );
                                $this->assertPageEnd();

                                $lookingForPage = 2;
                                break;

                        case 2:
                                // Page 2
                                $this->assertPageStart( $this->pageId2 + $i * self::$numOfPages, NS_MAIN,
                                        "BackupDumperTestP2" );
                                $this->assertRevision( $this->revId2_1 + $i * self::$numOfRevs, "BackupDumperTestP2Summary1",
                                        $this->textId2_1, false, "jprywrymfhysqllua29tj3sc7z39dl2",
                                        "BackupDumperTestP2Text1" );
                                $this->assertRevision( $this->revId2_2 + $i * self::$numOfRevs, "BackupDumperTestP2Summary2",
                                        $this->textId2_2, false, "b7vj5ks32po5m1z1t1br4o7scdwwy95",
                                        "BackupDumperTestP2Text2", $this->revId2_1 + $i * self::$numOfRevs );
                                $this->assertRevision( $this->revId2_3 + $i * self::$numOfRevs, "BackupDumperTestP2Summary3",
                                        $this->textId2_3, false, "jfunqmh1ssfb8rs43r19w98k28gg56r",
                                        "BackupDumperTestP2Text3", $this->revId2_2 + $i * self::$numOfRevs );
                                $this->assertRevision( $this->revId2_4 + $i * self::$numOfRevs,
                                        "BackupDumperTestP2Summary4 extra",
                                        $this->textId2_4, false, "6o1ciaxa6pybnqprmungwofc4lv00wv",
                                        "BackupDumperTestP2Text4 some additional Text",
                                        $this->revId2_3 + $i * self::$numOfRevs );
                                $this->assertPageEnd();

                                $lookingForPage = 4;
                                break;

                        case 4:
                                // Page 4
                                $this->assertPageStart( $this->pageId4 + $i * self::$numOfPages, NS_TALK,
                                        "Talk:BackupDumperTestP1" );
                                $this->assertRevision( $this->revId4_1 + $i * self::$numOfRevs,
                                        "Talk BackupDumperTestP1 Summary1",
                                        $this->textId4_1, false, "nktofwzd0tl192k3zfepmlzxoax1lpe",
                                        "Talk about BackupDumperTestP1 Text1" );
                                $this->assertPageEnd();

                                $lookingForPage = 1;

                                // We dealt with the whole iteration.
                                $i++;
                                break;

                        default:
                                $this->fail( "Bad setting for lookingForPage ($lookingForPage)" );
                        }

                        // 3. Checking for the end of the current checkpoint file
                        if ( $this->xml->nodeType == XMLReader::END_ELEMENT
                                && $this->xml->name == "mediawiki" ) {

                                $this->assertDumpEnd();
                                $fileOpened = false;
                        }
                }

                // Assuring we completely read all files ...
                $this->assertFalse( $fileOpened, "Currently read file still open?" );
                $this->assertEmpty( $files, "Remaining unchecked files" );

                // ... and have dealt with more than one checkpoint file
                $this->assertGreaterThan( 1, $checkpointFiles, "# of checkpoint files" );

                $this->expectETAOutput();
        }

        function testCheckpointPlain() {
                $this->checkpointHelper();
        }

        function testCheckpointGzip() {
                $this->checkpointHelper( "gzip" );
        }


        private function setUpStub( $fname = null, $iterations = 1 ) {
                if ( $fname === null ) {
                        $fname = $this->getNewTempFile();
                }
                $header = '<mediawiki xmlns="http://www.mediawiki.org/xml/export-0.7/" '
                        . 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" '
                        . 'xsi:schemaLocation="http://www.mediawiki.org/xml/export-0.7/ '
                        . 'http://www.mediawiki.org/xml/export-0.7.xsd" version="0.7" xml:lang="en">
  <siteinfo>
    <sitename>wikisvn</sitename>
    <base>http://localhost/wiki-svn/index.php/Main_Page</base>
    <generator>MediaWiki 1.20alpha</generator>
    <case>first-letter</case>
    <namespaces>
      <namespace key="-2" case="first-letter">Media</namespace>
      <namespace key="-1" case="first-letter">Special</namespace>
      <namespace key="0" case="first-letter" />
      <namespace key="1" case="first-letter">Talk</namespace>
      <namespace key="2" case="first-letter">User</namespace>
      <namespace key="3" case="first-letter">User talk</namespace>
      <namespace key="4" case="first-letter">Wikisvn</namespace>
      <namespace key="5" case="first-letter">Wikisvn talk</namespace>
      <namespace key="6" case="first-letter">File</namespace>
      <namespace key="7" case="first-letter">File talk</namespace>
      <namespace key="8" case="first-letter">MediaWiki</namespace>
      <namespace key="9" case="first-letter">MediaWiki talk</namespace>
      <namespace key="10" case="first-letter">Template</namespace>
      <namespace key="11" case="first-letter">Template talk</namespace>
      <namespace key="12" case="first-letter">Help</namespace>
      <namespace key="13" case="first-letter">Help talk</namespace>
      <namespace key="14" case="first-letter">Category</namespace>
      <namespace key="15" case="first-letter">Category talk</namespace>
    </namespaces>
  </siteinfo>
';
                $tail = '</mediawiki>
';

                $content = $header;
                $iterations = intval( $iterations );
                for ( $i = 0; $i < $iterations; $i++ ) {

                        $page1 = '  <page>
    <title>BackupDumperTestP1</title>
    <ns>0</ns>
    <id>' . ( $this->pageId1 + $i * self::$numOfPages ) . '</id>
    <revision>
      <id>' . ( $this->revId1_1 + $i * self::$numOfRevs ) . '</id>
      <timestamp>2012-04-01T16:46:05Z</timestamp>
      <contributor>
        <ip>127.0.0.1</ip>
      </contributor>
      <comment>BackupDumperTestP1Summary1</comment>
      <sha1>0bolhl6ol7i6x0e7yq91gxgaan39j87</sha1>
      <text id="' . $this->textId1_1 . '" bytes="23" />
    </revision>
  </page>
';
                        $page2 = '  <page>
    <title>BackupDumperTestP2</title>
    <ns>0</ns>
    <id>' . ( $this->pageId2 + $i * self::$numOfPages ) . '</id>
    <revision>
      <id>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</id>
      <timestamp>2012-04-01T16:46:05Z</timestamp>
      <contributor>
        <ip>127.0.0.1</ip>
      </contributor>
      <comment>BackupDumperTestP2Summary1</comment>
      <sha1>jprywrymfhysqllua29tj3sc7z39dl2</sha1>
      <text id="' . $this->textId2_1 . '" bytes="23" />
    </revision>
    <revision>
      <id>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</id>
      <parentid>' . ( $this->revId2_1 + $i * self::$numOfRevs ) . '</parentid>
      <timestamp>2012-04-01T16:46:05Z</timestamp>
      <contributor>
        <ip>127.0.0.1</ip>
      </contributor>
      <comment>BackupDumperTestP2Summary2</comment>
      <sha1>b7vj5ks32po5m1z1t1br4o7scdwwy95</sha1>
      <text id="' . $this->textId2_2 . '" bytes="23" />
    </revision>
    <revision>
      <id>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</id>
      <parentid>' . ( $this->revId2_2 + $i * self::$numOfRevs ) . '</parentid>
      <timestamp>2012-04-01T16:46:05Z</timestamp>
      <contributor>
        <ip>127.0.0.1</ip>
      </contributor>
      <comment>BackupDumperTestP2Summary3</comment>
      <sha1>jfunqmh1ssfb8rs43r19w98k28gg56r</sha1>
      <text id="' . $this->textId2_3 . '" bytes="23" />
    </revision>
    <revision>
      <id>' . ( $this->revId2_4 + $i * self::$numOfRevs ) . '</id>
      <parentid>' . ( $this->revId2_3 + $i * self::$numOfRevs ) . '</parentid>
      <timestamp>2012-04-01T16:46:05Z</timestamp>
      <contributor>
        <ip>127.0.0.1</ip>
      </contributor>
      <comment>BackupDumperTestP2Summary4 extra</comment>
      <sha1>6o1ciaxa6pybnqprmungwofc4lv00wv</sha1>
      <text id="' . $this->textId2_4 . '" bytes="44" />
    </revision>
  </page>
';
                        // page 3 not in stub

                        $page4 = '  <page>
    <title>Talk:BackupDumperTestP1</title>
    <ns>1</ns>
    <id>' . ( $this->pageId4 + $i * self::$numOfPages ) . '</id>
    <revision>
      <id>' . ( $this->revId4_1 + $i * self::$numOfRevs ) . '</id>
      <timestamp>2012-04-01T16:46:05Z</timestamp>
      <contributor>
        <ip>127.0.0.1</ip>
      </contributor>
      <comment>Talk BackupDumperTestP1 Summary1</comment>
      <sha1>nktofwzd0tl192k3zfepmlzxoax1lpe</sha1>
      <text id="' . $this->textId4_1 . '" bytes="35" />
    </revision>
  </page>
';
                        $content .= $page1 . $page2 . $page4;
                }
                $content .= $tail;
                $this->assertEquals( strlen( $content ), file_put_contents(
                                $fname, $content ), "Length of prepared stub" );
                return $fname;
        }

}