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<?php
namespace MediaWiki\Tests\Maintenance;
use BaseDump;
use MediaWiki\Maintenance\TextPassDumper;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Revision\SlotRecord;
use MediaWikiLangTestCase;
use WikiExporter;
use XmlDumpWriter;
/**
* Tests for TextPassDumper that rely on the database
*
* Some of these tests use the old constuctor for TextPassDumper
* and the dump() function, while others use the new loadWithArgv( $args )
* function and execute(). This is to ensure both the old and new methods
* work properly.
*
* @group Database
* @group Dump
* @covers \MediaWiki\Maintenance\TextPassDumper
*/
class TextPassDumperDatabaseTest extends DumpTestCase {
use PageDumpTestDataTrait;
public function addDBData() {
parent::addDBData();
$this->addTestPages( $this->getTestSysop()->getUser() );
}
public static function schemaVersionProvider() {
foreach ( XmlDumpWriter::$supportedSchemas as $schemaVersion ) {
yield [ $schemaVersion ];
}
}
/**
* @dataProvider schemaVersionProvider
*/
public function testFullTextPlain( $schemaVersion ) {
// Setting up the dump
$nameStub = $this->setUpStub( 'AllStubs', $schemaVersion );
$nameFull = $this->getNewTempFile();
$dumper = new TextPassDumper( [ "--stub=file:" . $nameStub,
"--output=file:" . $nameFull, '--schema-version', $schemaVersion ] );
$dumper->reporting = false;
$dumper->setDB( $this->getDb() );
// Performing the dump
$dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
// Checking the dumped data
$this->assertDumpSchema( $nameFull, $this->getXmlSchemaPath( $schemaVersion ) );
$asserter = $this->getDumpAsserter( $schemaVersion );
$this->setSiteVarMappings( $asserter );
$this->setAllRevisionsVarMappings( $asserter );
$siteInfoTemplate = $this->getDumpTemplatePath( 'SiteInfo', $schemaVersion );
$pagesTemplate = $this->getDumpTemplatePath( 'AllText', $schemaVersion );
$asserter->open( $nameFull );
$asserter->assertDumpHead( $siteInfoTemplate );
$asserter->assertDOM( $pagesTemplate );
$asserter->assertDumpEnd();
}
public function testPrefetchPlain() {
global $wgXmlDumpSchemaVersion;
/** @var RevisionRecord[] $revisions */
$revisions = [
$this->rev1_1->getId() => $this->rev1_1,
$this->rev2_1->getId() => $this->rev2_1,
$this->rev2_2->getId() => $this->rev2_2,
$this->rev2_3->getId() => $this->rev2_3,
$this->rev2_4->getId() => $this->rev2_4,
$this->rev4_1->getId() => $this->rev4_1,
];
$getPrefetchText = static function ( $pageid, $revid, $role ) use ( $revisions ) {
$rev = $revisions[$revid];
$slot = $rev->getSlot( $role );
// NOTE: TextPassDumper does a check on the string length,
// so we have to pad to match the original length. The hash is not checked.
return str_pad( "Prefetch: ({$pageid}/{$revid}/$role)", $slot->getSize(), '*' );
};
// The mock itself
$prefetchMock = $this->getMockBuilder( BaseDump::class )
->onlyMethods( [ 'prefetch' ] )
->disableOriginalConstructor()
->getMock();
$prefetchMock->method( 'prefetch' )
->willReturnCallback( $getPrefetchText );
// Setting up of the dump
$nameStub = $this->setUpStub( 'AllStubs', $wgXmlDumpSchemaVersion );
$nameFull = $this->getNewTempFile();
$dumper = new TextPassDumper( [ "--stub=file:" . $nameStub,
"--output=file:" . $nameFull ] );
$dumper->prefetch = $prefetchMock;
$dumper->reporting = false;
$dumper->setDB( $this->getDb() );
// Performing the dump
$dumper->dump( WikiExporter::FULL, WikiExporter::TEXT );
// Checking the dumped data
$this->assertDumpSchema( $nameFull, $this->getXmlSchemaPath( $wgXmlDumpSchemaVersion ) );
$asserter = $this->getDumpAsserter( $wgXmlDumpSchemaVersion );
$this->setSiteVarMappings( $asserter );
$this->setAllRevisionsVarMappings( $asserter );
$siteInfoTemplate = $this->getDumpTemplatePath( 'SiteInfo', $wgXmlDumpSchemaVersion );
$pagesTemplate = $this->getDumpTemplatePath( 'AllText', $wgXmlDumpSchemaVersion );
$asserter->setVarMapping(
'rev1_1_main_text',
$getPrefetchText( $this->rev1_1->getPageId(), $this->rev1_1->getId(), SlotRecord::MAIN )
);
$asserter->setVarMapping(
'rev1_1_aux_text',
$getPrefetchText( $this->rev1_1->getPageId(), $this->rev1_1->getId(), 'aux' )
);
$asserter->setVarMapping(
'rev2_1_main_text',
$getPrefetchText( $this->rev2_1->getPageId(), $this->rev2_1->getId(), SlotRecord::MAIN )
);
$asserter->setVarMapping(
'rev2_2_main_text',
$getPrefetchText( $this->rev2_2->getPageId(), $this->rev2_2->getId(), SlotRecord::MAIN )
);
$asserter->setVarMapping(
'rev2_3_main_text',
$getPrefetchText( $this->rev2_3->getPageId(), $this->rev2_3->getId(), SlotRecord::MAIN )
);
$asserter->setVarMapping(
'rev2_4_main_text',
$getPrefetchText( $this->rev2_4->getPageId(), $this->rev2_4->getId(), SlotRecord::MAIN )
);
$asserter->setVarMapping(
'rev4_1_main_text',
$getPrefetchText( $this->rev4_1->getPageId(), $this->rev4_1->getId(), SlotRecord::MAIN )
);
$asserter->open( $nameFull );
$asserter->assertDumpHead( $siteInfoTemplate );
$asserter->assertDOM( $pagesTemplate );
$asserter->assertDumpEnd();
}
/**
* Ensures that checkpoint dumps are used and written, by successively increasing the
* stub size and dumping until the duration crosses a threshold.
*
* @param string $checkpointFormat Either "file" for plain text or "gzip" for gzipped
* checkpoint files.
*/
private function checkpointHelper( $checkpointFormat = "file" ) {
global $wgXmlDumpSchemaVersion;
// 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. Make sure that the generated volume is above the buffer size
// set below. Otherwise, the checkpointing does not trigger.
$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( 'AllStubs', $wgXmlDumpSchemaVersion, $nameStub, $iterations );
$dumper = new TextPassDumper();
$dumper->loadWithArgv( [ "--stub=file:" . $nameStub,
"--output=" . $checkpointFormat . ":" . $nameOutputDir . "/full",
"--maxtime=1", // This is in minutes. Fixup is below
"--buffersize=32768", // The default of 32 iterations fill up 32 KiB about twice
"--checkpointfile=checkpoint-%s-%s.xml.gz" ] );
$dumper->setDB( $this->getDb() );
$dumper->maxTimeAllowed = $checkpointAfter; // Patching maxTime from 1 minute
$dumper->stderr = $stderr;
// The actual dump and taking time
$ts_before = microtime( true );
$dumper->execute();
$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;
$asserter = $this->getDumpAsserter();
// 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 );
}
$asserter->open( $nameOutputDir . "/" . $fname );
$asserter->assertDumpHead();
$fileOpened = true;
$checkpointFiles++;
}
// 2. Performing a single page check
switch ( $lookingForPage ) {
case 1:
// Page 1
$asserter->assertPageStart(
$this->pageId1 + $i * self::$numOfPages,
NS_MAIN,
$this->pageTitle1->getPrefixedText()
);
$asserter->assertRevision(
$this->rev1_1->getId() + $i * self::$numOfRevs,
$this->rev1_1->getComment()->text,
$this->getSlotTextId( $this->rev1_1->getSlot( SlotRecord::MAIN ) ),
false,
$this->rev1_1->getSha1(),
$this->getSlotText( $this->rev1_1->getSlot( SlotRecord::MAIN ) )
);
$asserter->assertPageEnd();
$lookingForPage = 2;
break;
case 2:
// Page 2
$asserter->assertPageStart(
$this->pageId2 + $i * self::$numOfPages,
NS_MAIN,
$this->pageTitle2->getPrefixedText()
);
$asserter->assertRevision(
$this->rev2_1->getId() + $i * self::$numOfRevs,
$this->rev2_1->getComment()->text,
$this->getSlotTextId( $this->rev2_1->getSlot( SlotRecord::MAIN ) ),
false,
$this->rev2_1->getSha1(),
$this->getSlotText( $this->rev2_1->getSlot( SlotRecord::MAIN ) )
);
$asserter->assertRevision(
$this->rev2_2->getId() + $i * self::$numOfRevs,
$this->rev2_2->getComment()->text,
$this->getSlotTextId( $this->rev2_2->getSlot( SlotRecord::MAIN ) ),
false,
$this->rev2_2->getSha1(),
$this->getSlotText( $this->rev2_2->getSlot( SlotRecord::MAIN ) ),
$this->rev2_1->getId() + $i * self::$numOfRevs
);
$asserter->assertRevision(
$this->rev2_3->getId() + $i * self::$numOfRevs,
$this->rev2_3->getComment()->text,
$this->getSlotTextId( $this->rev2_3->getSlot( SlotRecord::MAIN ) ),
false,
$this->rev2_3->getSha1(),
$this->getSlotText( $this->rev2_3->getSlot( SlotRecord::MAIN ) ),
$this->rev2_2->getId() + $i * self::$numOfRevs
);
$asserter->assertRevision(
$this->rev2_4->getId() + $i * self::$numOfRevs,
$this->rev2_4->getComment()->text,
$this->getSlotTextId( $this->rev2_4->getSlot( SlotRecord::MAIN ) ),
false,
$this->rev2_4->getSha1(),
$this->getSlotText( $this->rev2_4->getSlot( SlotRecord::MAIN ) ),
$this->rev2_3->getId() + $i * self::$numOfRevs
);
$asserter->assertPageEnd();
$lookingForPage = 4;
break;
case 4:
// Page 4
$asserter->assertPageStart(
$this->pageId4 + $i * self::$numOfPages,
NS_TALK,
$this->pageTitle4->getPrefixedText()
);
$asserter->assertRevision(
$this->rev4_1->getId() + $i * self::$numOfRevs,
$this->rev4_1->getComment()->text,
$this->getSlotTextId( $this->rev4_1->getSlot( SlotRecord::MAIN ) ),
false,
$this->rev4_1->getSha1(),
$this->getSlotText( $this->rev4_1->getSlot( SlotRecord::MAIN ) ),
false,
"BackupTextPassTestModel",
"text/plain"
);
$asserter->assertPageEnd();
$lookingForPage = 1;
// We dealt with the whole iteration.
$i++;
break;
default:
$this->fail( "Bad setting for lookingForPage ($lookingForPage)" );
}
}
$asserter->assertDumpEnd();
$fileOpened = false;
// Assuring we completely read all files ...
$this->assertFalse( $fileOpened, "Currently read file still open?" );
$this->assertSame( [], $files, "Remaining unchecked files" );
// ... and have dealt with more than one checkpoint file
$this->assertGreaterThan(
1,
$checkpointFiles,
"expected more than 1 checkpoint to have been created. "
. "Checkpoint interval is $checkpointAfter seconds, maybe your computer is too fast?"
);
$this->expectETAOutput();
}
/**
* Broken per T70653.
*
* @group large
* @group Broken
*/
public function testCheckpointPlain() {
$this->checkpointHelper();
}
/**
* tests for working checkpoint generation in gzip format work.
*
* We keep this test in addition to the simpler self::testCheckpointPlain, as there
* were once problems when the used sinks were DumpPipeOutputs.
*
* xmldumps-backup typically uses bzip2 instead of gzip. However, as bzip2 requires
* PHP extensions, we go for gzip instead, which triggers the same relevant code
* paths while still being testable on more systems.
*
* Broken per T70653.
*
* @group large
* @group Broken
*/
public function testCheckpointGzip() {
$this->checkHasGzip();
$this->checkpointHelper( "gzip" );
}
/**
* Creates a stub file that is used for testing the text pass of dumps
*
* @param string $templateName
* @param string $schemaVersion
* @param string|null $outFile Absolute name of the file to write
* the stub into. If this parameter is null, a new temporary
* file is generated that is automatically removed upon tearDown.
* @param int $iterations (Optional) specifies how often the block
* of 3 pages should go into the stub file. The page and
* revision id increase further and further, while the text
* id of the first iteration is reused. The pages and revision
* of iteration > 1 have no corresponding representation in the database.
*
* @return string Absolute filename of the stub
*/
private function setUpStub( $templateName, $schemaVersion, $outFile = null, $iterations = 1 ) {
$outFile ??= $this->getNewTempFile();
$templatePath = $this->getDumpTemplatePath( $templateName, $schemaVersion );
$asserter = $this->getDumpAsserter( $schemaVersion );
$this->setAllRevisionsVarMappings( $asserter );
// Make revision point to a non-existent address, to test refreshing
// content address
$asserter->setVarMapping( 'rev4_1_main_location', 'tt:11111111' );
$writer = new XmlDumpWriter( XmlDumpWriter::WRITE_STUB, $schemaVersion );
$content = $writer->openStream();
for ( $i = 0; $i < $iterations; $i++ ) {
$asserter->setVarMapping( 'rev1_1_pageid', $this->pageId1 + $i * self::$numOfPages );
$asserter->setVarMapping( 'rev1_1_id', $this->rev1_1->getId() + $i * self::$numOfRevs );
$asserter->setVarMapping( 'rev2_1_pageid', $this->pageId2 + $i * self::$numOfPages );
$asserter->setVarMapping( 'rev2_1_id', $this->rev2_1->getId() + $i * self::$numOfRevs );
$asserter->setVarMapping( 'rev2_2_id', $this->rev2_2->getId() + $i * self::$numOfRevs );
$asserter->setVarMapping( 'rev2_3_id', $this->rev2_3->getId() + $i * self::$numOfRevs );
$asserter->setVarMapping( 'rev2_4_id', $this->rev2_4->getId() + $i * self::$numOfRevs );
$asserter->setVarMapping( 'rev4_1_pageid', $this->pageId4 + $i * self::$numOfPages );
$asserter->setVarMapping( 'rev4_1_id', $this->rev4_1->getId() + $i * self::$numOfRevs );
$asserter->setVarMapping( 'rev5_1_pageid', $this->pageId5 + $i * self::$numOfPages );
$asserter->setVarMapping( 'rev5_1_id', $this->rev5_1->getId() + $i * self::$numOfRevs );
$xml = file_get_contents( $templatePath );
$xml = $asserter->stripTestTags( $xml );
$xml = $asserter->resolveVars( $xml );
$content .= $xml;
}
$content .= $writer->closeStream();
$this->assertEquals( strlen( $content ), file_put_contents(
$outFile, $content ), "Length of prepared stub" );
return $outFile;
}
}
/**
* Tests for TextPassDumper that do not rely on the database
*
* (As the Database group is only detected at class level (not method level), we
* cannot bring this test case's tests into the above main test case.)
*
* @group Dump
* @covers \MediaWiki\Maintenance\TextPassDumper
*/
class TextPassDumperDatabaselessTest extends MediaWikiLangTestCase {
/**
* Ensures that setting the buffer size is effective.
*
* @dataProvider bufferSizeProvider
*/
public function testBufferSizeSetting( $expected, $size, $msg ) {
$dumper = new TextPassDumperAccessor();
$dumper->loadWithArgv( [ "--buffersize=" . $size ] );
$dumper->execute();
$this->assertEquals( $expected, $dumper->getBufferSize(), $msg );
}
/**
* Ensures that setting the buffer size is effective.
*
* @dataProvider bufferSizeProvider
*/
public static function bufferSizeProvider() {
// expected, bufferSize to initialize with, message
return [
[ 512 * 1024, 512 * 1024, "Setting 512 KiB is not effective" ],
[ 8192, 8192, "Setting 8 KiB is not effective" ],
[ 4096, 2048, "Could set buffer size below lower bound" ]
];
}
}
/**
* Accessor for internal state of TextPassDumper
*
* Do not warrentless add getters here.
*/
class TextPassDumperAccessor extends TextPassDumper {
/**
* Gets the bufferSize.
*
* If bufferSize setting does not work correctly, testCheckpoint... tests
* fail and point in the wrong direction. To aid in troubleshooting when
* testCheckpoint... tests break at some point in the future, we test the
* bufferSize setting, hence need this accessor.
*
* (Yes, bufferSize is internal state of the TextPassDumper, but aiding
* debugging of testCheckpoint... in the future seems to be worth testing
* against it nonetheless.)
*
* @return int
*/
public function getBufferSize() {
return $this->bufferSize;
}
public function dump( $history, $text = null ) {
return true;
}
}