ParserCacheSerializationTestCases.php
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ParserCacheSerializationTestCases.php
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	<?php

	namespace MediaWiki\Tests\Parser;

	use JsonSerializable;
	use MediaWiki\Debug\MWDebug;
	use MediaWiki\Json\JsonCodec;
	use MediaWiki\Parser\CacheTime;
	use MediaWiki\Parser\ParserOutput;
	use MediaWiki\Tests\Json\JsonDeserializableSubClass;
	use MediaWiki\Title\Title;
	use MediaWiki\Title\TitleValue;
	use MediaWiki\Utils\MWTimestamp;
	use MediaWikiIntegrationTestCase;
	use stdClass;
	use Wikimedia\TestingAccessWrapper;
	use Wikimedia\Tests\SerializationTestUtils;

	/**
	* A collection of serialization test cases for parser cache.
	*
	* Contains a set of acceptance tests for CacheTime and ParserOutput objects.
	* The acceptance tests will be run on instances created by the current code,
	* as well as instances deserialized from stored serializations for various MW
	* versions.
	*
	* Since backwards compatibility for objects stored in ParserCache is necessary,
	* failure of a deserialization test most likely indicates an error in the code.
	* However, since the serialization format may change, thus if proper compatibility
	* logic was added but a serialization test is still failing, you might want to
	* update stored serialized data using validateParserCacheSerializationTestData.php
	* script. The same script should be run when more acceptance tests are added
	* to generate and save serialized object, which would be used for acceptance
	* deserialization tests.
	*
	* See:
	* https://www.mediawiki.org/wiki/Manual:Parser_cache/Serialization_compatibility
	*
	* @see SerializationTestTrait
	* @see SerializationTestUtils
	* @see ValidateParserCacheSerializationTestData
	*/
	abstract class ParserCacheSerializationTestCases {

	public const FAKE_TIME = 123456789;

	public const FAKE_CACHE_EXPIRY = 42;

	private const MOCK_EXT_DATA = [
	'boolean' => true,
	'null' => null,
	'number' => 42,
	'string' => 'string',
	'array' => [ 1, 2, 3 ],
	'map' => [ 'key' => 'value' ]
	];

	private const MOCK_FALSY_PROPERTIES = [
	'boolean' => false,
	'null' => null,
	'number' => 0,
	'string' => '',
	'numstring' => '0',
	'array' => [],
	];

	private const MOCK_BINARY_PROPERTIES = [
	'empty' => '',
	'\x00' => "\x00",
	'gzip' => "\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x03\xcb\x48\xcd\xc9\xc9\x57\x28\xcf\x2f'
	. '\xca\x49\x01\x00\x85\x11\x4a\x0d\x0b\x00\x00\x00",
	];

	private const SECTIONS = [
	[
	'toclevel' => 0,
	'line' => 'heading_1',
	'level' => 1,
	'number' => '1.0',
	'index' => 'T-1',
	'fromtitle' => '',
	'byteoffset' => null,
	'anchor' => 'heading_1',
	'linkAnchor' => '#heading_1',
	],
	[
	'toclevel' => 1,
	'line' => 'heading_2',
	'level' => 2,
	'number' => '2.0',
	'index' => 'T-2',
	'fromtitle' => '',
	'byteoffset' => null,
	'anchor' => 'heading_2',
	'linkAnchor' => '#heading_2'
	],
	];

	private const CACHE_TIME = '20010419042521';

	/**
	* Get acceptance test cases for CacheTime class.
	* @see SerializationTestTrait::getTestInstancesAndAssertions()
	* @return array[]
	*/
	public static function getCacheTimeTestCases(): array {
	$cacheTimeWithUsedOptions = new CacheTime();
	$cacheTimeWithUsedOptions->recordOptions( [ 'optA', 'optX' ] );

	$cacheTimeWithTime = new CacheTime();
	$cacheTimeWithTime->setCacheTime( self::CACHE_TIME );

	$cacheExpiry = 10;
	$cacheTimeWithExpiry = new CacheTime();
	$cacheTimeWithExpiry->updateCacheExpiry( $cacheExpiry );

	$cacheRevisionId = 1234;
	$cacheTimeWithRevId = new CacheTime();
	$cacheTimeWithRevId->setCacheRevisionId( $cacheRevisionId );

	return [
	'empty' => [
	'instance' => new CacheTime(),
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, CacheTime $object ) {
	$testCase->assertSame( self::FAKE_CACHE_EXPIRY, $object->getCacheExpiry() );
	$testCase->assertNull( $object->getCacheRevisionId() );
	$testCase->assertSame(
	MWTimestamp::convert( TS_MW, self::FAKE_TIME ),
	$object->getCacheTime()
	);
	// When the cacheRevisionId is not set, this method always returns true.
	$testCase->assertFalse( $object->isDifferentRevision( 29 ) );
	$testCase->assertFalse( $object->isDifferentRevision( 31 ) );
	$testCase->assertTrue( $object->isCacheable() );
	$testCase->assertSame(
	$object->getCacheTime(),
	MWTimestamp::convert( TS_MW, self::FAKE_TIME )
	);
	}
	],
	'usedOptions' => [
	'instance' => $cacheTimeWithUsedOptions,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, CacheTime $object ) {
	$testCase->assertArrayEquals( [ 'optA', 'optX' ], $object->getUsedOptions() );
	}
	],
	'cacheTime' => [
	'instance' => $cacheTimeWithTime,
	'assertions' => static function (
	MediaWikiIntegrationTestCase $testCase, CacheTime $object
	) {
	$testCase->assertSame( self::CACHE_TIME, $object->getCacheTime() );
	}
	],
	'cacheExpiry' => [
	'instance' => $cacheTimeWithExpiry,
	'assertions' => static function (
	MediaWikiIntegrationTestCase $testCase, CacheTime $object
	) use ( $cacheExpiry ) {
	$testCase->assertSame( $cacheExpiry, $object->getCacheExpiry() );
	}
	],
	'cacheRevisionId' => [
	'instance' => $cacheTimeWithRevId,
	'assertions' => static function (
	MediaWikiIntegrationTestCase $testCase, CacheTime $object
	) use ( $cacheRevisionId ) {
	$testCase->assertSame( $cacheRevisionId, $object->getCacheRevisionId() );
	}
	]
	];
	}

	/**
	* This matches PagePropsTable::encodeValue() and represents how
	* page properties are actually stored in the database.
	* @param mixed $v
	* @return int\|float\|string
	*/
	public static function pagePropEncode( $v ) {
	if ( is_int( $v ) \|\| is_float( $v ) \|\| is_string( $v ) ) {
	return $v;
	}
	if ( is_bool( $v ) ) {
	return (int)$v;
	}
	if ( $v === null ) {
	return '';
	}
	if ( is_array( $v ) ) {
	// strval on an array yield 'Array' plus a warning.
	return 'Array';
	}
	return strval( $v );
	}

	/**
	* Assert equality in terms of semantically equivalent page property
	* values.
	* @param MediaWikiIntegrationTestCase $testCase
	* @param mixed $expected
	* @param mixed $actual
	*/
	public static function assertPagePropSame( MediaWikiIntegrationTestCase $testCase, $expected, $actual ): void {
	$testCase->assertSame(
	self::pagePropEncode( $expected ),
	$actual
	);
	}

	/**
	* Get acceptance test cases for ParserOutput class.
	* @see SerializationTestTrait::getTestInstancesAndAssertions()
	* @return array[]
	*/
	public static function getParserOutputTestCases() {
	MWDebug::filterDeprecationForTest( '/::setPageProperty with (non-scalar\|non-string\|null) value/' );
	MWDebug::filterDeprecationForTest( '/::addLanguageLink without prefix/' );
	$parserOutputWithCacheTimeProps = new ParserOutput( 'CacheTime' );
	$parserOutputWithCacheTimeProps->setCacheTime( self::CACHE_TIME );
	$parserOutputWithCacheTimeProps->updateCacheExpiry( 10 );
	$parserOutputWithCacheTimeProps->setCacheRevisionId( 42 );

	$parserOutputWithUsedOptions = new ParserOutput( 'Dummy' );
	$parserOutputWithUsedOptions->recordOption( 'optA' );
	$parserOutputWithUsedOptions->recordOption( 'optX' );

	$parserOutputWithExtensionData = new ParserOutput( '' );
	foreach ( self::MOCK_EXT_DATA as $key => $value ) {
	$parserOutputWithExtensionData->setExtensionData( $key, $value );
	}

	$parserOutputWithCodecableExtensionData = new ParserOutput( '' );
	$parserOutputWithCodecableExtensionData->setExtensionData(
	'map',
	[
	'a' => new JsonDeserializableSubClass( 'super', 'sub' ),
	'b' => (object)[ 'r' => 2, 'd' => '2' ],
	]
	);

	$parserOutputWithProperties = new ParserOutput( '' );
	foreach ( self::MOCK_EXT_DATA as $key => $value ) {
	$parserOutputWithProperties->setPageProperty( $key, $value );
	}

	$parserOutputWithProperties1_45 = new ParserOutput( '' );
	foreach ( self::MOCK_EXT_DATA as $key => $value ) {
	$value = self::pagePropEncode( $value );
	$parserOutputWithProperties1_45->setPageProperty( $key, $value );
	}

	$parserOutputWithFalsyProperties = new ParserOutput( '' );
	foreach ( self::MOCK_FALSY_PROPERTIES as $key => $value ) {
	$parserOutputWithFalsyProperties->setPageProperty( $key, $value );
	}

	$parserOutputWithFalsyProperties1_45 = new ParserOutput( '' );
	foreach ( self::MOCK_FALSY_PROPERTIES as $key => $value ) {
	$value = self::pagePropEncode( $value );
	$parserOutputWithFalsyProperties1_45->setPageProperty( $key, $value );
	}

	$parserOutputWithBinaryProperties = new ParserOutput( '' );
	foreach ( self::MOCK_BINARY_PROPERTIES as $key => $value ) {
	$parserOutputWithBinaryProperties->setPageProperty( $key, $value );
	}

	$parserOutputWithMetadata = new ParserOutput( '' );
	$parserOutputWithMetadata->setSpeculativeRevIdUsed( 42 );
	$parserOutputWithMetadata->addLanguageLink( Title::makeTitle( NS_MAIN, 'link1' ) );
	$parserOutputWithMetadata->addLanguageLink( Title::makeTItle( NS_MAIN, 'link2' ) );
	$parserOutputWithMetadata->addInterwikiLink( Title::makeTitle( NS_MAIN, 'interwiki1', '', 'enwiki' ) );
	$parserOutputWithMetadata->addInterwikiLink( Title::makeTitle( NS_MAIN, 'interwiki2', '', 'enwiki' ) );
	$parserOutputWithMetadata->addCategory( Title::makeTitle( NS_CATEGORY, 'category2' ), '1' );
	$parserOutputWithMetadata->addCategory( Title::makeTitle( NS_CATEGORY, 'category1' ), '2' );
	$parserOutputWithMetadata->setIndicator( 'indicator1', 'indicator1_value' );
	$parserOutputWithMetadata->setTitleText( 'title_text1' );
	$parserOutputWithMetadata->setSections( self::SECTIONS );
	$parserOutputWithMetadata->addLink( Title::makeTitle( NS_MAIN, 'Link1' ), 42 );
	$parserOutputWithMetadata->addLink( Title::makeTitle( NS_USER, 'Link2' ), 43 );
	$parserOutputWithMetadata->addTemplate(
	Title::makeTitle( NS_TEMPLATE, 'Template1' ),
	42,
	4242
	);
	$parserOutputWithMetadata->addImage(
	new TitleValue( NS_FILE, 'Image1' ),
	MWTimestamp::convert( TS_MW, 123456789 ),
	'test_sha1'
	);
	$parserOutputWithMetadata->addExternalLink( 'https://test.org' );
	$parserOutputWithMetadata->addHeadItem( 'head_item1', 'tag1' );
	$parserOutputWithMetadata->addModules( [ 'module1' ] );
	$parserOutputWithMetadata->addModuleStyles( [ 'module_style1' ] );
	$parserOutputWithMetadata->setJsConfigVar( 'key1', 'value1' );
	$parserOutputWithMetadata->addWarningMsg( 'rawmessage', 'warning1' );
	$parserOutputWithMetadata->setIndexPolicy( 'noindex' );
	$parserOutputWithMetadata->setRevisionTimestamp( MWTimestamp::convert( TS_MW, 987654321 ) );
	$parserOutputWithMetadata->setLimitReportData( 'limit_report_key1', 'value1' );
	$parserOutputWithMetadata->setEnableOOUI( true );
	$parserOutputWithMetadata->setHideNewSection( true );
	$parserOutputWithMetadata->setNewSection( true );
	$parserOutputWithMetadata->setOutputFlag( 'test' );

	// For compatibility with older serialized objects, clear out the
	// $mWarningMsgs array, which is not currently stored.
	// See T343050 for the steps required to remove this workaround in
	// the future.
	TestingAccessWrapper::newFromObject(
	$parserOutputWithMetadata
	)->mWarningMsgs = [];

	$parserOutputWithMetadataPost1_44 = clone $parserOutputWithMetadata;
	$parserOutputWithMetadataPost1_44->setLanguageLinks( [ 'm:link1', 'mw:link2' ] );

	$parserOutputWithSections = new ParserOutput( '' );
	$parserOutputWithSections->setSections( self::SECTIONS );

	$parserOutputWithMetadataPost1_31 = new ParserOutput( '' );
	$parserOutputWithMetadataPost1_31->addWrapperDivClass( 'test_wrapper' );
	$parserOutputWithMetadataPost1_31->setSpeculativePageIdUsed( 4242 );
	$parserOutputWithMetadataPost1_31->setRevisionTimestampUsed(
	MWTimestamp::convert( TS_MW, 123456789 )
	);
	$parserOutputWithMetadataPost1_31->setRevisionUsedSha1Base36( 'test_hash' );
	$parserOutputWithMetadataPost1_31->setNoGallery( true );

	$parserOutputWithMetadataPost1_34 = new ParserOutput( '' );
	$parserOutputWithMetadataPost1_34->addExtraCSPStyleSrc( 'style1' );
	$parserOutputWithMetadataPost1_34->addExtraCSPDefaultSrc( 'default1' );
	$parserOutputWithMetadataPost1_34->addExtraCSPScriptSrc( 'script1' );
	$parserOutputWithMetadataPost1_34->addLink( Title::makeTitle( NS_SPECIAL, 'Link3' ) );

	$parserOutputWithEmptyToC = new ParserOutput( '' );
	$parserOutputWithEmptyToC->setSections( [] );

	MWDebug::clearDeprecationFilters();

	$testCases = [
	'empty' => [
	'instance' => new ParserOutput( '' ),
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	// Empty CacheTime assertions
	self::getCacheTimeTestCases()['empty']['assertions']( $testCase, $object );
	// Empty string text is counted as having text.
	$testCase->assertTrue( $object->hasText() );

	$testCase->assertSame( '', $object->getRawText() );
	$testCase->assertSame( '', $object->getWrapperDivClass() );
	$testCase->assertNull( $object->getSpeculativeRevIdUsed() );
	$testCase->assertNull( $object->getSpeculativePageIdUsed() );
	$testCase->assertNull( $object->getRevisionTimestampUsed() );
	$testCase->assertNull( $object->getRevisionUsedSha1Base36() );
	$testCase->assertArrayEquals( [], $object->getLanguageLinks() );
	$testCase->assertArrayEquals( [], $object->getInterwikiLinks() );
	$testCase->assertArrayEquals( [], $object->getCategoryNames() );
	$testCase->assertArrayEquals( [], $object->getCategoryMap() );
	$testCase->assertArrayEquals( [], $object->getIndicators() );
	$testCase->assertSame( '', $object->getTitleText() );
	$testCase->assertArrayEquals( [], $object->getSections() );
	$testCase->assertNull( $object->getTOCData() );
	$testCase->assertArrayEquals( [], $object->getLinks() );
	$testCase->assertArrayEquals( [], $object->getLinksSpecial() );
	$testCase->assertArrayEquals( [], $object->getTemplates() );
	$testCase->assertArrayEquals( [], $object->getTemplateIds() );
	$testCase->assertArrayEquals( [], $object->getImages() );
	$testCase->assertArrayEquals( [], $object->getFileSearchOptions() );
	$testCase->assertArrayEquals( [], $object->getExternalLinks() );
	$testCase->assertFalse( $object->getNoGallery() );
	$testCase->assertArrayEquals( [], $object->getHeadItems() );
	$testCase->assertArrayEquals( [], $object->getModules() );
	$testCase->assertArrayEquals( [], $object->getModuleStyles() );
	$testCase->assertArrayEquals( [], $object->getJsConfigVars() );
	$testCase->assertArrayEquals( [], $object->getWarnings() );
	$testCase->assertSame( '', $object->getIndexPolicy() );
	$testCase->assertNull( $object->getRevisionTimestamp() );
	$testCase->assertArrayEquals( [], $object->getLimitReportData() );
	$testCase->assertArrayEquals( [], $object->getLimitReportJSData() );
	$testCase->assertFalse( $object->getEnableOOUI() );
	$testCase->assertArrayEquals( [], $object->getExtraCSPDefaultSrcs() );
	$testCase->assertArrayEquals( [], $object->getExtraCSPScriptSrcs() );
	$testCase->assertArrayEquals( [], $object->getExtraCSPStyleSrcs() );
	$testCase->assertFalse( $object->getHideNewSection() );
	$testCase->assertFalse( $object->getNewSection() );
	$testCase->assertFalse( $object->getDisplayTitle() );
	$testCase->assertFalse( $object->getOutputFlag( 'test' ) );
	$testCase->assertArrayEquals( [], $object->getAllFlags() );
	$testCase->assertNull( $object->getPageProperty( 'test_prop' ) );
	$testCase->assertArrayEquals( [], $object->getPageProperties() );
	$testCase->assertArrayEquals( [], $object->getUsedOptions() );
	$testCase->assertNull( $object->getExtensionData( 'test_ext_data' ) );
	$testCase->assertNull( $object->getTimeProfile( 'wall' ) );
	}
	],
	'cacheTime' => [
	'instance' => $parserOutputWithCacheTimeProps,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame( self::CACHE_TIME, $object->getCacheTime() );
	$testCase->assertSame( 10, $object->getCacheExpiry() );
	$testCase->assertSame( 42, $object->getCacheRevisionId() );
	}
	],
	'text' => [
	'instance' => new ParserOutput( 'Lorem Ipsum' ),
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertTrue( $object->hasText() );
	$testCase->assertSame( 'Lorem Ipsum', $object->getRawText() );
	}
	],
	'usedOptions' => [
	'instance' => $parserOutputWithUsedOptions,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertArrayEquals( [ 'optA', 'optX' ], $object->getUsedOptions() );
	}
	],
	'extensionData' => [
	'instance' => $parserOutputWithExtensionData,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame( self::MOCK_EXT_DATA['boolean'], $object->getExtensionData( 'boolean' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['null'], $object->getExtensionData( 'null' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['number'], $object->getExtensionData( 'number' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['string'], $object->getExtensionData( 'string' ) );
	$testCase->assertArrayEquals( self::MOCK_EXT_DATA['array'], $object->getExtensionData( 'array' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['map'], $object->getExtensionData( 'map' ) );
	}
	],
	'codecableExtensionData' => [
	'instance' => $parserOutputWithCodecableExtensionData,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$actual = $object->getExtensionData( 'map' );
	$testCase->assertIsArray( $actual );
	$testCase->assertArrayHasKey( 'a', $actual );
	$testCase->assertInstanceOf(
	JsonDeserializableSubClass::class, $actual['a']
	);
	$testCase->assertSame( 'super', $actual['a']->getSuperClassField() );
	$testCase->assertSame( 'sub', $actual['a']->getSubClassField() );
	$testCase->assertArrayHasKey( 'b', $actual );
	$testCase->assertInstanceOf(
	stdClass::class, $actual['b']
	);
	$testCase->assertSame(
	2, $actual['b']->r
	);
	$testCase->assertSame(
	'2', $actual['b']->d
	);
	$testCase->assertCount( 2, (array)$actual['b'] );
	$testCase->assertCount( 2, $actual );
	}
	],
	'pageProperties' => [
	'instance' => $parserOutputWithProperties,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame( self::MOCK_EXT_DATA['boolean'], $object->getPageProperty( 'boolean' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['null'], $object->getPageProperty( 'null' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['number'], $object->getPageProperty( 'number' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['string'], $object->getPageProperty( 'string' ) );
	$testCase->assertArrayEquals( self::MOCK_EXT_DATA['array'], $object->getPageProperty( 'array' ) );
	$testCase->assertSame( self::MOCK_EXT_DATA['map'], $object->getPageProperty( 'map' ) );
	$testCase->assertArrayEquals( self::MOCK_EXT_DATA, $object->getPageProperties() );
	}
	],
	'pageProperties1_45' => [
	'instance' => $parserOutputWithProperties1_45,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	self::assertPagePropSame( $testCase, self::MOCK_EXT_DATA['boolean'], $object->getPageProperty( 'boolean' ) );
	self::assertPagePropSame( $testCase, self::MOCK_EXT_DATA['null'], $object->getPageProperty( 'null' ) );
	self::assertPagePropSame( $testCase, self::MOCK_EXT_DATA['number'], $object->getPageProperty( 'number' ) );
	self::assertPagePropSame( $testCase, self::MOCK_EXT_DATA['string'], $object->getPageProperty( 'string' ) );
	self::assertPagePropSame( $testCase, self::MOCK_EXT_DATA['array'], $object->getPageProperty( 'array' ) );
	self::assertPagePropSame( $testCase, self::MOCK_EXT_DATA['map'], $object->getPageProperty( 'map' ) );
	$testCase->assertArrayEquals(
	array_map( fn ( $v )=>self::pagePropEncode( $v ), self::MOCK_EXT_DATA ),
	array_map( fn ( $v )=>self::pagePropEncode( $v ), $object->getPageProperties() )
	);
	}
	],
	'binaryPageProperties' => [
	'instance' => $parserOutputWithBinaryProperties,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame( self::MOCK_BINARY_PROPERTIES['empty'], $object->getPageProperty( 'empty' ) );
	$testCase->assertSame( self::MOCK_BINARY_PROPERTIES['\x00'], $object->getPageProperty( '\x00' ) );
	$testCase->assertSame( self::MOCK_BINARY_PROPERTIES['gzip'], $object->getPageProperty( 'gzip' ) );
	$testCase->assertArrayEquals( self::MOCK_BINARY_PROPERTIES, $object->getPageProperties() );
	}
	],
	'withMetadata' => [
	'instance' => $parserOutputWithMetadata,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame( 42, $object->getSpeculativeRevIdUsed() );
	$testCase->assertArrayEquals( [ 'link1', 'link2' ], $object->getLanguageLinks() );
	$testCase->assertArrayEquals( [ 'enwiki' => [
	'interwiki1' => 1,
	'interwiki2' => 1
	] ], $object->getInterwikiLinks() );
	$testCase->assertArrayEquals( [ 'category1', 'category2' ], $object->getCategoryNames() );
	$testCase->assertArrayEquals( [
	'category1' => '2',
	'category2' => '1'
	], $object->getCategoryMap() );
	$testCase->assertArrayEquals( [ 'indicator1' => 'indicator1_value' ], $object->getIndicators() );
	$testCase->assertSame( 'title_text1', $object->getTitleText() );
	$testCase->assertArrayEquals( self::SECTIONS, $object->getSections() );
	$testCase->assertNotNull( $object->getTOCData() );
	$testCase->assertArrayEquals( [
	NS_MAIN => [ 'Link1' => 42 ],
	NS_USER => [ 'Link2' => 43 ]
	], $object->getLinks() );
	$testCase->assertArrayEquals( [
	NS_SPECIAL => [ 'Template1' => 42 ]
	], $object->getTemplates() );
	$testCase->assertArrayEquals( [
	NS_SPECIAL => [ 'Template1' => 4242 ]
	], $object->getTemplateIds() );
	$testCase->assertArrayEquals( [ 'Image1' => 1 ], $object->getImages() );
	$testCase->assertArrayEquals( [ 'Image1' => [
	'time' => MWTimestamp::convert( TS_MW, 123456789 ), 'sha1' => 'test_sha1'
	] ], $object->getFileSearchOptions() );
	$testCase->assertArrayEquals( [ 'https://test.com' => 1 ], $object->getExternalLinks() );
	$testCase->assertArrayEquals( [ 'tag1' => 'head_item1' ], $object->getHeadItems() );
	$testCase->assertArrayEquals( [ 'module1' ], $object->getModules() );
	$testCase->assertArrayEquals( [ 'module_style1' ], $object->getModuleStyles() );
	$testCase->assertArrayEquals( [ 'key1' => 'value1' ], $object->getJsConfigVars() );
	$testCase->assertArrayEquals( [ 'warning1' ], $object->getWarnings() );
	$testCase->assertSame( 'noindex', $object->getIndexPolicy() );
	$testCase->assertSame( MWTimestamp::convert( TS_MW, 987654321 ), $object->getRevisionTimestamp() );
	$testCase->assertArrayEquals(
	[ 'limit_report_key1' => 'value1' ],
	$object->getLimitReportData()
	);
	$testCase->assertArrayEquals(
	[ 'limit_report_key1' => 'value1' ],
	$object->getLimitReportJSData()
	);
	$testCase->assertTrue( $object->getEnableOOUI() );
	$testCase->assertTrue( $object->getHideNewSection() );
	$testCase->assertTrue( $object->getNewSection() );
	$testCase->assertTrue( $object->getOutputFlag( 'test' ) );
	$testCase->assertArrayEquals( [ 'test' ], $object->getAllFlags() );
	}
	],
	'withMetadataPost1_44' => [
	'instance' => $parserOutputWithMetadataPost1_44,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame( 42, $object->getSpeculativeRevIdUsed() );
	$testCase->assertArrayEquals( [ 'm:link1', 'mw:link2' ], $object->getLanguageLinks() );
	$testCase->assertArrayEquals( [ 'enwiki' => [
	'interwiki1' => 1,
	'interwiki2' => 1
	] ], $object->getInterwikiLinks() );
	$testCase->assertArrayEquals( [ 'category1', 'category2' ], $object->getCategoryNames() );
	$testCase->assertArrayEquals( [
	'category1' => '2',
	'category2' => '1'
	], $object->getCategoryMap() );
	$testCase->assertArrayEquals( [ 'indicator1' => 'indicator1_value' ], $object->getIndicators() );
	$testCase->assertSame( 'title_text1', $object->getTitleText() );
	$testCase->assertArrayEquals( self::SECTIONS, $object->getSections() );
	$testCase->assertNotNull( $object->getTOCData() );
	$testCase->assertArrayEquals( [
	NS_MAIN => [ 'Link1' => 42 ],
	NS_USER => [ 'Link2' => 43 ]
	], $object->getLinks() );
	$testCase->assertArrayEquals( [
	NS_SPECIAL => [ 'Template1' => 42 ]
	], $object->getTemplates() );
	$testCase->assertArrayEquals( [
	NS_SPECIAL => [ 'Template1' => 4242 ]
	], $object->getTemplateIds() );
	$testCase->assertArrayEquals( [ 'Image1' => 1 ], $object->getImages() );
	$testCase->assertArrayEquals( [ 'Image1' => [
	'time' => MWTimestamp::convert( TS_MW, 123456789 ), 'sha1' => 'test_sha1'
	] ], $object->getFileSearchOptions() );
	$testCase->assertArrayEquals( [ 'https://test.com' => 1 ], $object->getExternalLinks() );
	$testCase->assertArrayEquals( [ 'tag1' => 'head_item1' ], $object->getHeadItems() );
	$testCase->assertArrayEquals( [ 'module1' ], $object->getModules() );
	$testCase->assertArrayEquals( [ 'module_style1' ], $object->getModuleStyles() );
	$testCase->assertArrayEquals( [ 'key1' => 'value1' ], $object->getJsConfigVars() );
	$testCase->assertArrayEquals( [ 'warning1' ], $object->getWarnings() );
	$testCase->assertSame( 'noindex', $object->getIndexPolicy() );
	$testCase->assertSame( MWTimestamp::convert( TS_MW, 987654321 ), $object->getRevisionTimestamp() );
	$testCase->assertArrayEquals(
	[ 'limit_report_key1' => 'value1' ],
	$object->getLimitReportData()
	);
	$testCase->assertArrayEquals(
	[ 'limit_report_key1' => 'value1' ],
	$object->getLimitReportJSData()
	);
	$testCase->assertTrue( $object->getEnableOOUI() );
	$testCase->assertTrue( $object->getHideNewSection() );
	$testCase->assertTrue( $object->getNewSection() );
	$testCase->assertTrue( $object->getOutputFlag( 'test' ) );
	$testCase->assertArrayEquals( [ 'test' ], $object->getAllFlags() );
	}
	],
	'withSections' => [
	'instance' => $parserOutputWithSections,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertArrayEquals( self::SECTIONS, $object->getSections() );
	$testCase->assertNotNull( $object->getTOCData() );
	}
	],
	'withMetadataPost1_31' => [
	'instance' => $parserOutputWithMetadataPost1_31,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame( 'test_wrapper', $object->getWrapperDivClass() );
	$testCase->assertSame( 4242, $object->getSpeculativePageIdUsed() );
	$testCase->assertSame(
	MWTimestamp::convert( TS_MW, 123456789 ),
	$object->getRevisionTimestampUsed()
	);
	$testCase->assertSame( 'test_hash', $object->getRevisionUsedSha1Base36() );
	$testCase->assertTrue( $object->getNoGallery() );
	}
	],
	'withMetadataPost1_34' => [
	'instance' => $parserOutputWithMetadataPost1_34,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertArrayEquals( [ 'default1' ], $object->getExtraCSPDefaultSrcs() );
	$testCase->assertArrayEquals( [ 'script1' ], $object->getExtraCSPScriptSrcs() );
	$testCase->assertArrayEquals( [ 'style1' ], $object->getExtraCSPStyleSrcs() );
	$testCase->assertArrayEquals( [ 'Link3' => 1 ], $object->getLinksSpecial() );
	}
	],
	'withFalsyProperties' => [
	'instance' => $parserOutputWithFalsyProperties,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertSame(
	self::MOCK_FALSY_PROPERTIES['boolean'],
	$object->getPageProperty( 'boolean' )
	);
	$testCase->assertSame(
	self::MOCK_FALSY_PROPERTIES['null'],
	$object->getPageProperty( 'null' )
	);
	$testCase->assertSame(
	self::MOCK_FALSY_PROPERTIES['number'],
	$object->getPageProperty( 'number' )
	);
	$testCase->assertSame(
	self::MOCK_FALSY_PROPERTIES['string'],
	$object->getPageProperty( 'string' )
	);
	$testCase->assertSame(
	self::MOCK_FALSY_PROPERTIES['numstring'],
	$object->getPageProperty( 'numstring' )
	);
	$testCase->assertArrayEquals(
	self::MOCK_FALSY_PROPERTIES['array'],
	$object->getPageProperty( 'array' )
	);
	}
	],
	'withFalsyProperties1_45' => [
	'instance' => $parserOutputWithFalsyProperties1_45,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	self::assertPagePropSame( $testCase,
	self::MOCK_FALSY_PROPERTIES['boolean'],
	$object->getPageProperty( 'boolean' )
	);
	self::assertPagePropSame( $testCase,
	self::MOCK_FALSY_PROPERTIES['null'],
	$object->getPageProperty( 'null' )
	);
	self::assertPagePropSame( $testCase,
	self::MOCK_FALSY_PROPERTIES['number'],
	$object->getPageProperty( 'number' )
	);
	self::assertPagePropSame( $testCase,
	self::MOCK_FALSY_PROPERTIES['string'],
	$object->getPageProperty( 'string' )
	);
	self::assertPagePropSame( $testCase,
	self::MOCK_FALSY_PROPERTIES['numstring'],
	$object->getPageProperty( 'numstring' )
	);
	self::assertPagePropSame( $testCase,
	self::MOCK_FALSY_PROPERTIES['array'],
	$object->getPageProperty( 'array' )
	);
	}
	],
	'withEmptyToC' => [
	'instance' => $parserOutputWithEmptyToC,
	'assertions' => static function ( MediaWikiIntegrationTestCase $testCase, ParserOutput $object ) {
	$testCase->assertArrayEquals( [], $object->getSections() );
	$testCase->assertNotNull( $object->getTOCData() );
	},
	],
	];
	// We don't serialize or restore parseStartTime any more, so
	// ensure that it is cleared in the instances we are going to
	// compare against.
	foreach ( $testCases as $name => $case ) {
	$case['instance']->clearParseStartTime();
	}
	return $testCases;
	}

	/**
	* @param string $class the class name
	* @return string[][] a list of supported serialization formats info
	* in the following format:
	* 'ext' => string file extension for stored serializations
	* 'serializer' => callable to serialize objects
	* 'deserializer' => callable to deserialize objects
	*/
	public static function getSupportedSerializationFormats( string $class ): array {
	$serializationFormats = [ [
	'ext' => 'serialized',
	'serializer' => 'serialize',
	'deserializer' => 'unserialize'
	] ];
	if ( is_subclass_of( $class, JsonSerializable::class ) ) {
	$jsonCodec = new JsonCodec();
	$serializationFormats[] = [
	'ext' => 'json',
	'serializer' => static function ( JsonSerializable $obj ) use ( $jsonCodec ) {
	return $jsonCodec->serialize( $obj );
	},
	'deserializer' => static function ( $data ) use ( $jsonCodec ) {
	return $jsonCodec->deserialize( $data );
	}
	];
	}
	// T374736: hack for old test cases
	foreach ( $serializationFormats as [ 'deserializer' => &$d ] ) {
	$oldDeserializer = $d;
	$d = static function ( $data ) use ( $oldDeserializer ) {
	MWDebug::filterDeprecationForTest( '/::addLanguageLink without prefix/' );
	return $oldDeserializer( $data );
	};
	}
	return $serializationFormats;
	}
	}

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