MediaWikiIntegrationTestCaseTest.php
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MediaWikiIntegrationTestCaseTest.php
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	<?php

	use MediaWiki\Content\TextContent;
	use MediaWiki\Logger\LoggerFactory;
	use MediaWiki\MainConfigNames;
	use MediaWiki\MediaWikiServices;
	use MediaWiki\Revision\SlotRecord;
	use MediaWiki\Title\Title;
	use PHPUnit\Framework\AssertionFailedError;
	use PHPUnit\Framework\MockObject\MockObject;
	use Psr\Log\LoggerInterface;
	use Psr\Log\NullLogger;
	use Wikimedia\ObjectCache\EmptyBagOStuff;
	use Wikimedia\ObjectCache\HashBagOStuff;
	use Wikimedia\Rdbms\LoadBalancer;
	use Wikimedia\Rdbms\ReadOnlyMode;
	use Wikimedia\TestingAccessWrapper;

	/**
	* @covers \MediaWikiIntegrationTestCase
	* @group MediaWikiIntegrationTestCaseTest
	* @group Database
	*
	* @author Addshore
	*/
	class MediaWikiIntegrationTestCaseTest extends MediaWikiIntegrationTestCase {

	private const START_GLOBALS = [
	'MediaWikiIntegrationTestCaseTestGLOBAL-ExistingString' => 'foo',
	'MediaWikiIntegrationTestCaseTestGLOBAL-ExistingStringEmpty' => '',
	'MediaWikiIntegrationTestCaseTestGLOBAL-ExistingArray' => [ 1, 'foo' => 'bar' ],
	'MediaWikiIntegrationTestCaseTestGLOBAL-ExistingArrayEmpty' => [],
	];

	public static function setUpBeforeClass(): void {
	parent::setUpBeforeClass();
	foreach ( self::START_GLOBALS as $key => $value ) {
	$GLOBALS[$key] = $value;
	}
	}

	public static function tearDownAfterClass(): void {
	parent::tearDownAfterClass();
	foreach ( self::START_GLOBALS as $key => $value ) {
	unset( $GLOBALS[$key] );
	}
	}

	public static function provideExistingKeysAndNewValues() {
	$providedArray = [];
	foreach ( self::START_GLOBALS as $key => $_ ) {
	$providedArray[] = [ $key, 'newValue' ];
	$providedArray[] = [ $key, [ 'newValue' ] ];
	}
	return $providedArray;
	}

	/**
	* @dataProvider provideExistingKeysAndNewValues
	*
	* @covers \MediaWikiIntegrationTestCase::setMwGlobals
	* @covers \MediaWikiIntegrationTestCase::mediaWikiTearDown
	*/
	public function testSetGlobalsAreRestoredOnTearDown__before( $globalKey, $newValue ) {
	$this->setMwGlobals( $globalKey, $newValue );
	$this->assertEquals(
	$newValue,
	$GLOBALS[$globalKey],
	'Global failed to correctly set'
	);
	}

	/**
	* @note This cannot use depends because the other test also uses a data provider.
	* @dataProvider provideExistingKeysAndNewValues
	*
	* @covers \MediaWikiIntegrationTestCase::setMwGlobals
	* @covers \MediaWikiIntegrationTestCase::mediaWikiTearDown
	*/
	public function testSetGlobalsAreRestoredOnTearDown__after( $globalKey ) {
	$this->assertSame(
	self::START_GLOBALS[$globalKey],
	$GLOBALS[$globalKey],
	'Global failed to be restored on tearDown'
	);
	}

	public function testObjectCache() {
	$this->assertSame( 'hash', $this->getConfVar( MainConfigNames::MainCacheType ) );

	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getObjectCacheFactory()->getLocalClusterInstance() );
	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getObjectCacheFactory()->getLocalServerInstance() );
	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getObjectCacheFactory()->getInstance( CACHE_ANYTHING ) );
	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getObjectCacheFactory()->getInstance( CACHE_ACCEL ) );
	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getObjectCacheFactory()->getInstance( CACHE_DB ) );
	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getObjectCacheFactory()->getInstance( CACHE_MEMCACHED ) );

	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getLocalServerObjectCache() );
	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()->getMainObjectStash() );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setMwGlobals
	* @covers \MediaWikiIntegrationTestCase::mediaWikiTearDown
	*/
	public function testSetNonExistentGlobalsAreUnsetOnTearDown__before() {
	$globalKey = 'abcdefg1234567';
	$this->setMwGlobals( $globalKey, true );
	$this->assertTrue(
	$GLOBALS[$globalKey],
	'Global failed to correctly set'
	);
	return $globalKey;
	}

	/**
	* @depends testSetNonExistentGlobalsAreUnsetOnTearDown__before
	* @covers \MediaWikiIntegrationTestCase::setMwGlobals
	* @covers \MediaWikiIntegrationTestCase::mediaWikiTearDown
	*/
	public function testSetNonExistentGlobalsAreUnsetOnTearDown__after( string $globalKey ) {
	$this->assertFalse(
	isset( $GLOBALS[$globalKey] ),
	'Global failed to be correctly unset'
	);
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::overrideConfigValue
	* @covers \MediaWikiIntegrationTestCase::overrideConfigValues
	*/
	public function testOverrideConfigValues__before() {
	$nsInfo1 = $this->getServiceContainer()->getNamespaceInfo();

	$oldSitename = $this->getConfVar( MainConfigNames::Sitename );

	$this->overrideConfigValue( MainConfigNames::Sitename, 'TestingSitenameOverride' );
	$nsInfo2 = $this->getServiceContainer()->getNamespaceInfo();

	$this->overrideConfigValues( [ 'TestDummyConfig4556' => 'TestDummyConfigOverride' ] );
	$nsInfo3 = $this->getServiceContainer()->getNamespaceInfo();

	$this->assertNotSame( $nsInfo1, $nsInfo2, 'Service instances should have been reset' );
	$this->assertNotSame( $nsInfo2, $nsInfo3, 'Service instances should have been reset' );

	$config = $this->getServiceContainer()->getMainConfig();
	$fakeConfigKey = 'TestDummyConfig4556';
	$this->assertSame( 'TestingSitenameOverride', $config->get( MainConfigNames::Sitename ) );
	$this->assertSame( 'TestDummyConfigOverride', $config->get( $fakeConfigKey ) );

	return [ $oldSitename, $fakeConfigKey ];
	}

	/**
	* @depends testOverrideConfigValues__before
	* @covers \MediaWikiIntegrationTestCase::overrideConfigValue
	* @covers \MediaWikiIntegrationTestCase::overrideConfigValues
	*/
	public function testOverrideConfigValues__after( array $data ) {
	[ $oldSitename, $fakeConfigKey ] = $data;
	$config = $this->getServiceContainer()->getMainConfig();
	$this->assertSame(
	$oldSitename,
	$config->get( MainConfigNames::Sitename ),
	'Config variable should have been restored'
	);
	$this->assertFalse( $config->has( $fakeConfigKey ), 'Config variable should have been unset' );
	}

	/**
	* Some configuration variables are overridden when setting up the test environment.
	* Make sure that these can be overridden consistently.
	*/
	public function testOverrideTestConfig() {
	$config = $this->getServiceContainer()->getMainConfig();

	// Check that default overrides were applied
	$this->assertSame(
	'A',
	$config->get( MainConfigNames::PasswordDefault )
	);

	// Make sure that overrides applied by the test environment are
	// consistent between the main config and global variables.
	$this->assertSame(
	$config->get( MainConfigNames::MainCacheType ),
	$GLOBALS[ 'wgMainCacheType' ]
	);
	$this->assertSame(
	$config->get( MainConfigNames::PasswordDefault ),
	$GLOBALS[ 'wgPasswordDefault' ]
	);
	$this->assertSame(
	$config->get( MainConfigNames::JobTypeConf ),
	$GLOBALS[ 'wgJobTypeConf' ]
	);

	$this->overrideConfigValue( MainConfigNames::JobTypeConf, 'XXX' );
	$config = $this->getServiceContainer()->getMainConfig();
	$this->assertSame( 'XXX', $config->get( MainConfigNames::JobTypeConf ) );
	$this->assertSame( 'XXX', $GLOBALS[ 'wgJobTypeConf' ] );

	$this->overrideConfigValues( [ MainConfigNames::JobTypeConf => 'YYY' ] );
	$config = $this->getServiceContainer()->getMainConfig();
	$this->assertSame( 'YYY', $config->get( MainConfigNames::JobTypeConf ) );
	$this->assertSame( 'YYY', $GLOBALS[ 'wgJobTypeConf' ] );

	$this->setMwGlobals( 'wgJobTypeConf', 'ZZZ' );
	$config = $this->getServiceContainer()->getMainConfig();
	$this->assertSame( 'ZZZ', $GLOBALS[ 'wgJobTypeConf' ] );

	// Values set with overrideConfigValue() take precedence over values set
	// with setMwGlobals().
	$this->assertSame( 'YYY', $config->get( MainConfigNames::JobTypeConf ) );
	}

	public function testSetMainCache() {
	// Cache should be set to a hash by default.
	$this->assertInstanceOf( HashBagOStuff::class, $this->getServiceContainer()
	->getObjectCacheFactory()->getLocalClusterInstance() );

	// Use HashBagOStuff.
	$this->setMainCache( CACHE_HASH );
	$cache = $this->getServiceContainer()->getObjectCacheFactory()->getLocalClusterInstance();
	$this->assertInstanceOf( HashBagOStuff::class, $cache );

	// Install different HashBagOStuff
	$cache = new HashBagOStuff();
	$name = $this->setMainCache( $cache );
	$this->assertSame( $cache, $this->getServiceContainer()->getObjectCacheFactory()->getLocalClusterInstance() );
	$this->assertSame( $cache, $this->getServiceContainer()->getObjectCacheFactory()->getInstance( $name ) );

	// Our custom cache object should not replace an existing entry.
	$this->assertNotSame( $cache, $this->getServiceContainer()->getObjectCacheFactory()->getInstance( CACHE_HASH ) );
	$this->setMainCache( CACHE_HASH );
	$this->assertNotSame( $cache, $this->getServiceContainer()->getObjectCacheFactory()->getLocalClusterInstance() );

	// We should be able to disable the cache.
	$this->assertSame( CACHE_NONE, $this->setMainCache( CACHE_NONE ) );
	$this->assertInstanceOf( EmptyBagOStuff::class, $this->getServiceContainer()
	->getObjectCacheFactory()->getLocalClusterInstance() );
	}

	public function testOverrideMwServices() {
	$initialServices = MediaWikiServices::getInstance();

	$this->overrideMwServices();
	$this->assertNotSame( $initialServices, MediaWikiServices::getInstance() );
	}

	public function testSetService() {
	$initialServices = MediaWikiServices::getInstance();
	$initialService = $initialServices->getDBLoadBalancer();
	$mockService = $this->createMock( LoadBalancer::class );

	$this->setService( 'DBLoadBalancer', $mockService );
	$this->assertNotSame(
	$initialService,
	MediaWikiServices::getInstance()->getDBLoadBalancer()
	);
	$this->assertSame( $mockService, MediaWikiServices::getInstance()->getDBLoadBalancer() );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testLoggersAreRestoredOnTearDown_replacingExistingLogger__before() {
	$oldLogger = LoggerFactory::getInstance( 'foo' );
	$logger = new NullLogger();
	$this->setLogger( 'foo', $logger );
	$overriddenLogger = LoggerFactory::getInstance( 'foo' );
	$this->assertSame( $logger, $overriddenLogger );
	$this->assertNotSame( $oldLogger, $overriddenLogger );
	return $oldLogger;
	}

	/**
	* @depends testLoggersAreRestoredOnTearDown_replacingExistingLogger__before
	* @covers \MediaWikiIntegrationTestCase::setLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testLoggersAreRestoredOnTearDown_replacingExistingLogger__after( LoggerInterface $mockLogger ) {
	$curLogger = LoggerFactory::getInstance( 'foo' );
	$this->assertNotSame( $mockLogger, $curLogger );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testLoggersAreRestoredOnTearDown_replacingNonExistingLogger__before() {
	$logger = new NullLogger();
	$this->setLogger( 'foo', $logger );
	$overriddenLogger = LoggerFactory::getInstance( 'foo' );
	$this->assertSame( $logger, $overriddenLogger );
	return $overriddenLogger;
	}

	/**
	* @depends testLoggersAreRestoredOnTearDown_replacingNonExistingLogger__before
	* @covers \MediaWikiIntegrationTestCase::setLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testLoggersAreRestoredOnTearDown_replacingNonExistingLogger__after(
	LoggerInterface $overriddenLogger
	) {
	$curLogger = LoggerFactory::getInstance( 'foo' );

	$this->assertNotSame( $overriddenLogger, $curLogger );
	$this->assertInstanceOf( \Psr\Log\LoggerInterface::class, $curLogger );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	* @doesNotPerformAssertions
	*/
	public function testLoggersAreRestoredOnTearDown_replacingSameLoggerTwice__before() {
	LoggerFactory::getInstance( 'baz' );
	$this->setLogger( 'foo', new NullLogger() );
	$this->setLogger( 'foo', new NullLogger() );
	}

	/**
	* @depends testLoggersAreRestoredOnTearDown_replacingSameLoggerTwice__before
	* @covers \MediaWikiIntegrationTestCase::setLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testLoggersAreRestoredOnTearDown_replacingSameLoggerTwice__after() {
	$curLogger = LoggerFactory::getInstance( 'baz' );
	$this->assertNotInstanceOf( MockObject::class, $curLogger );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setNullLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testNullLogger_createAndRemove__before() {
	$this->setNullLogger( 'tocreate' );
	$logger = LoggerFactory::getInstance( 'tocreate' );
	$this->assertInstanceOf( \Psr\Log\NullLogger::class, $logger );
	}

	/**
	* @depends testNullLogger_createAndRemove__before
	* @covers \MediaWikiIntegrationTestCase::setNullLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testNullLogger_createAndRemove__after() {
	$logger = LoggerFactory::getInstance( 'tocreate' );
	// Unwrap from LogCapturingSpi
	$inner = TestingAccessWrapper::newFromObject( $logger )->logger;
	$this->assertInstanceOf( \MediaWiki\Logger\LegacyLogger::class, $inner );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setNullLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testNullLogger_mutateAndRestore__before() {
	// Don't rely on the $wgDebugLogGroups and $wgDebugLogFile settings in
	// WMF CI to make LEVEL_DEBUG (100) the default. Control this in the test.
	$this->overrideConfigValue( MainConfigNames::DebugToolbar, true );

	$logger = LoggerFactory::getInstance( 'tomutate' );
	// Unwrap from LogCapturingSpi
	$inner = TestingAccessWrapper::newFromObject( $logger )->logger;
	$this->assertInstanceOf( \MediaWiki\Logger\LegacyLogger::class, $inner );
	$this->assertSame(
	100,
	TestingAccessWrapper::newFromObject( $inner )->minimumLevel,
	'original minimumLevel'
	);

	$this->setNullLogger( 'tomutate' );
	$this->assertSame(
	999,
	TestingAccessWrapper::newFromObject( $inner )->minimumLevel,
	'changed minimumLevel'
	);
	return $inner;
	}

	/**
	* @depends testNullLogger_mutateAndRestore__before
	* @covers \MediaWikiIntegrationTestCase::setNullLogger
	* @covers \MediaWikiIntegrationTestCase::restoreLoggers
	*/
	public function testNullLogger_mutateAndRestore__after( LoggerInterface $inner ) {
	$this->assertSame(
	100,
	TestingAccessWrapper::newFromObject( $inner )->minimumLevel,
	'restored minimumLevel'
	);
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setupDatabaseWithTestPrefix
	* @covers \MediaWikiIntegrationTestCase::copyTestData
	*/
	public function testCopyTestData() {
	// Avoid self-deadlocks with Sqlite
	$this->markTestSkippedIfDbType( 'sqlite' );

	$this->db->newInsertQueryBuilder()
	->insertInto( 'objectcache' )
	->row( [ 'keyname' => __METHOD__, 'value' => 'TEST', 'exptime' => $this->db->timestamp( 11 ) ] )
	->caller( __METHOD__ )
	->execute();

	// Make an untracked DB_PRIMARY connection
	$lb = $this->getServiceContainer()->getDBLoadBalancerFactory()->newMainLB();
	// Need a Database where the DB domain changes during table cloning
	$db = $lb->getConnectionInternal( DB_PRIMARY );

	$this->assertNotSame( $this->db, $db );

	// Make sure the DB connection has the fake table clones and the fake table prefix
	MediaWikiIntegrationTestCase::setupDatabaseWithTestPrefix( $db, self::dbPrefix() );

	$this->assertSame( $this->db->tablePrefix(), $db->tablePrefix(), 'tablePrefix' );

	// Make sure the DB connection has all the test data
	$this->copyTestData( $this->db, $db );

	$value = $db->newSelectQueryBuilder()
	->select( 'value' )
	->from( 'objectcache' )
	->where( [ 'keyname' => __METHOD__ ] )
	->caller( __METHOD__ )->fetchField();
	$this->assertSame( 'TEST', $value, 'Copied Data' );

	$lb->closeAll( __METHOD__ );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::resetServices
	*/
	public function testResetServices() {
	$services = MediaWikiServices::getInstance();

	// override a service instance
	$myReadOnlyMode = $this->createMock( ReadOnlyMode::class );
	$this->setService( 'ReadOnlyMode', $myReadOnlyMode );
	$this->setTemporaryHook( 'MyTestHook', static function ( &$n ) {
	$n++;
	}, true );

	$this->assertSame( $myReadOnlyMode, $services->getService( 'ReadOnlyMode' ) );

	// define a custom service
	$services->defineService(
	'_TEST_ResetService_Dummy',
	static function ( MediaWikiServices $services ) {
	$conf = $services->getMainConfig();
	return (object)[ 'lang' => $conf->get( MainConfigNames::LanguageCode ) ];
	}
	);

	$lang = $services->getMainConfig()->get( MainConfigNames::LanguageCode );
	$dummy = $services->getService( '_TEST_ResetService_Dummy' );
	$this->assertSame( $lang, $dummy->lang );

	// the actual test: change config, reset services.
	$this->overrideConfigValue( MainConfigNames::LanguageCode, 'qqx' );
	$this->resetServices();

	// the overridden service instance should still be there
	$this->assertSame( $myReadOnlyMode, $services->getService( 'ReadOnlyMode' ) );

	// the temporary hook should still be there
	$this->assertTrue(
	$this->getServiceContainer()->getHookContainer()->isRegistered( 'MyTestHook' )
	);

	// our custom service should have been re-created with the new language code
	$dummy2 = $services->getService( '_TEST_ResetService_Dummy' );
	$this->assertNotSame( $dummy2, $dummy );
	$this->assertSame( 'qqx', $dummy2->lang );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::getServiceContainer
	*/
	public function testGetServiceContainer() {
	$this->assertSame( MediaWikiServices::getInstance(), $this->getServiceContainer() );
	}

	/**
	* @covers \MediaWikiIntegrationTestCase::setTemporaryHook
	* @covers \MediaWikiIntegrationTestCase::clearHook
	*/
	public function testSetTemporaryHook() {
	$hookContainer = $this->getServiceContainer()->getHookContainer();
	$name = 'MWITCT_Dummy_Hook';

	$inc = static function ( &$n ) {
	$n++;
	};

	// add two handlers
	$this->setTemporaryHook( $name, $inc, false );
	$this->setTemporaryHook( $name, $inc, false );

	$count = 0;
	$hookContainer->run( $name, [ &$count ] );
	$this->assertSame( 2, $count );

	// replace existing hooks
	$this->setTemporaryHook( $name, $inc );

	$count = 0;
	$hookContainer->run( $name, [ &$count ] );
	$this->assertSame( 1, $count );

	// clear all hooks
	$this->clearHook( $name );

	$count = 0;
	$hookContainer->run( $name, [ &$count ] );
	$this->assertSame( 0, $count );

	// Put back a hook handler, so we can check in testSetTemporaryHookGetsReset
	// that hooks get reset between tests.
	$this->setTemporaryHook( $name, $inc );
	$this->assertTrue( $hookContainer->isRegistered( 'MWITCT_Dummy_Hook' ) );
	}

	public function testSetTemporaryHookGetsReset() {
	// We just check here that the hook we added in testSetTemporaryHook() is no longer present.
	$hookContainer = $this->getServiceContainer()->getHookContainer();
	$this->assertFalse( $hookContainer->isRegistered( 'MWITCT_Dummy_Hook' ) );
	}

	/**
	* @covers \NullHttpRequestFactory
	* @covers \NullMultiHttpClient
	*/
	public function testHttpRequestsArePrevented() {
	$httpRequestFactory = $this->getServiceContainer()->getHttpRequestFactory();

	$prevented = true;
	try {
	$httpRequestFactory->get( 'http://0.0.0.0/' );
	$prevented = false;
	} catch ( AssertionFailedError $e ) {
	// pass
	}

	$this->assertTrue( $prevented, 'get() should fail' );

	try {
	$httpRequestFactory->post( 'http://0.0.0.0/' );
	$prevented = false;
	} catch ( AssertionFailedError $e ) {
	// pass
	}

	$this->assertTrue( $prevented, 'post() should fail' );

	try {
	$httpRequestFactory->request( 'HEAD', 'http://0.0.0.0/' );
	$prevented = false;
	} catch ( AssertionFailedError $e ) {
	// pass
	}

	$this->assertTrue( $prevented, 'request() should fail' );

	try {
	$httpRequestFactory->create( 'http://0.0.0.0/' );
	$prevented = false;
	} catch ( AssertionFailedError $e ) {
	// pass
	}

	$this->assertTrue( $prevented, 'create() should fail' );

	try {
	$client = $httpRequestFactory->createGuzzleClient();
	$client->get( 'http://0.0.0.0/' );
	$prevented = false;
	} catch ( AssertionFailedError $e ) {
	// pass
	}

	$this->assertTrue( $prevented, 'createGuzzleClient() should fail' );

	$multiClient = $httpRequestFactory->createMultiClient();
	$req = [ 'url' => 'http://0.0.0.0/' ];

	try {
	$multiClient->run( $req );
	$prevented = false;
	} catch ( AssertionFailedError $e ) {
	// pass
	}

	$this->assertTrue( $prevented, 'MultiHttpRequest::run() should fail' );

	try {
	$multiClient->runMulti( [ $req ] );
	$prevented = false;
	} catch ( AssertionFailedError $e ) {
	// pass
	}

	$this->assertTrue( $prevented, 'MultiHttpRequest::runMulti() should fail' );
	}

	public function testEditPage() {
	// NOTE: can't use a data provider, since creating Title or WikiPage instances
	// is not safe without the test DB having been initialized.

	$this->assertEditPage( 'Hello Wörld A', __METHOD__, 'Hello Wörld A' );
	$this->assertEditPage( 'Hello Wörld B', __METHOD__, new TextContent( 'Hello Wörld B' ) );
	$this->assertEditPage( 'Hello Wörld C', Title::newFromText( __METHOD__ ), 'Hello Wörld C' );
	$this->assertEditPage(
	'Hello Wörld D',
	$this->getServiceContainer()->getWikiPageFactory()->newFromTitle( Title::newFromText( __METHOD__ ) ),
	'Hello Wörld D'
	);
	}

	public function assertEditPage( $expected, $page, $content ) {
	$status = $this->editPage( $page, $content );
	$this->assertStatusOK( $status );
	$this->assertNotNull( $status->getNewRevision() );

	$rev = $status->getNewRevision();
	$cnt = $rev->getContent( SlotRecord::MAIN );

	$this->assertSame( $expected, $cnt->serialize() );
	}

	}

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