PageUpdaterTest.php
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PageUpdaterTest.php
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	<?php

	namespace MediaWiki\Tests\Storage;

	use LogicException;
	use MediaWiki\CommentStore\CommentStoreComment;
	use MediaWiki\Content\Content;
	use MediaWiki\Content\JavaScriptContent;
	use MediaWiki\Content\TextContent;
	use MediaWiki\Content\WikitextContent;
	use MediaWiki\Deferred\DeferredUpdates;
	use MediaWiki\Json\FormatJson;
	use MediaWiki\MainConfigNames;
	use MediaWiki\Message\Message;
	use MediaWiki\Page\Event\PageRevisionUpdatedEvent;
	use MediaWiki\Page\PageIdentity;
	use MediaWiki\Page\PageIdentityValue;
	use MediaWiki\Page\WikiPage;
	use MediaWiki\Parser\ParserOptions;
	use MediaWiki\RecentChanges\ChangeTrackingEventIngress;
	use MediaWiki\RecentChanges\RecentChange;
	use MediaWiki\Revision\RenderedRevision;
	use MediaWiki\Revision\RevisionRecord;
	use MediaWiki\Revision\SlotRecord;
	use MediaWiki\Status\Status;
	use MediaWiki\Storage\EditResult;
	use MediaWiki\Tests\ExpectCallbackTrait;
	use MediaWiki\Tests\Language\LocalizationUpdateSpyTrait;
	use MediaWiki\Tests\recentchanges\ChangeTrackingUpdateSpyTrait;
	use MediaWiki\Tests\ResourceLoader\ResourceLoaderUpdateSpyTrait;
	use MediaWiki\Tests\Search\SearchUpdateSpyTrait;
	use MediaWiki\Title\Title;
	use MediaWiki\User\User;
	use MediaWiki\User\UserIdentity;
	use MediaWikiIntegrationTestCase;
	use PHPUnit\Framework\Assert;

	/**
	* @covers \MediaWiki\Storage\PageUpdater
	* @group Database
	*/
	class PageUpdaterTest extends MediaWikiIntegrationTestCase {

	use ChangeTrackingUpdateSpyTrait;
	use SearchUpdateSpyTrait;
	use LocalizationUpdateSpyTrait;
	use ResourceLoaderUpdateSpyTrait;
	use ExpectCallbackTrait;

	protected function setUp(): void {
	parent::setUp();

	// Force enable RC entry creation for category changes
	// so that tests can verify whether CategoryMembershipChangeJobs get enqueued.
	$this->overrideConfigValue( MainConfigNames::RCWatchCategoryMembership, true );

	$slotRoleRegistry = $this->getServiceContainer()->getSlotRoleRegistry();

	if ( !$slotRoleRegistry->isDefinedRole( 'aux' ) ) {
	$slotRoleRegistry->defineRoleWithModel(
	'aux',
	CONTENT_MODEL_WIKITEXT
	);
	}

	if ( !$slotRoleRegistry->isDefinedRole( 'derivedslot' ) ) {
	$slotRoleRegistry->defineRoleWithModel(
	'derivedslot',
	CONTENT_MODEL_WIKITEXT,
	[],
	true
	);
	}

	// protect against service container resets
	$this->setService( 'SlotRoleRegistry', $slotRoleRegistry );

	// Clear some extension hook handlers that may interfere with mock object expectations.
	$this->clearHooks( [
	'RevisionRecordInserted',
	'PageSaveComplete',
	'LinksUpdateComplete',
	] );
	}

	private function getDummyTitle( $method ) {
	return Title::newFromText( $method, $this->getDefaultWikitextNS() );
	}

	/**
	* @param int $revId
	*
	* @return null\|RecentChange
	*/
	private function getRecentChangeFor( $revId ) {
	$qi = RecentChange::getQueryInfo();
	$row = $this->getDb()->newSelectQueryBuilder()
	->queryInfo( $qi )
	->where( [ 'rc_this_oldid' => $revId ] )
	->caller( __METHOD__ )
	->fetchRow();

	return $row ? RecentChange::newFromRow( $row ) : null;
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	* @covers \MediaWiki\Page\WikiPage::newPageUpdater()
	*/
	public function testCreatePage() {
	$user = $this->getTestUser()->getUser();
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	$title = $this->getDummyTitle( __METHOD__ );
	$page = $wikiPageFactory->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );

	$oldStats = $this->getDb()->newSelectQueryBuilder()
	->select( '*' )
	->from( 'site_stats' )
	->where( '1=1' )
	->fetchRow();

	$this->assertFalse( $updater->wasCommitted(), 'wasCommitted' );

	$updater->addTag( 'foo' );
	$updater->addTags( [ 'bar', 'qux' ] );

	$tags = $updater->getExplicitTags();
	sort( $tags );
	$this->assertSame( [ 'bar', 'foo', 'qux' ], $tags, 'getExplicitTags' );

	// TODO: MCR: test additional slots
	$content = new TextContent( 'Lorem Ipsum' );
	$updater->setContent( SlotRecord::MAIN, $content );

	$parent = $updater->grabParentRevision();

	$this->assertNull( $parent, 'getParentRevision' );
	$this->assertFalse( $updater->wasCommitted(), 'wasCommitted' );

	// TODO: test that hasEditConflict() grabs the parent revision
	$this->assertFalse( $updater->hasEditConflict( 0 ), 'hasEditConflict' );
	$this->assertTrue( $updater->hasEditConflict( 1 ), 'hasEditConflict' );

	// TODO: test failure with EDIT_UPDATE
	// TODO: test EDIT_BOT, etc
	$updater->setFlags( EDIT_MINOR );
	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$rev = $updater->saveRevision( $summary );

	$this->assertNotNull( $rev );
	$this->assertSame( 0, $rev->getParentId() );
	$this->assertSame( $summary->text, $rev->getComment( RevisionRecord::RAW )->text );
	$this->assertSame( $user->getName(), $rev->getUser( RevisionRecord::RAW )->getName() );

	$this->assertTrue( $updater->wasCommitted(), 'wasCommitted()' );
	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertTrue( $updater->getStatus()->isOK(), 'getStatus()->isOK()' );
	$this->assertTrue( $updater->isNew(), 'isNew()' );
	$this->assertTrue( $updater->wasRevisionCreated(), 'wasRevisionCreated()' );
	$this->assertNotNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertInstanceOf(
	RevisionRecord::class,
	$updater->getStatus()->getNewRevision()
	);

	// check the EditResult object
	$this->assertFalse( $updater->getEditResult()->getOriginalRevisionId(),
	'EditResult::getOriginalRevisionId()' );
	$this->assertSame( 0, $updater->getEditResult()->getUndidRevId(),
	'EditResult::getUndidRevId()' );
	$this->assertTrue( $updater->getEditResult()->isNew(), 'EditResult::isNew()' );
	$this->assertFalse( $updater->getEditResult()->isRevert(), 'EditResult::isRevert()' );

	$rev = $updater->getNewRevision();
	$revContent = $rev->getContent( SlotRecord::MAIN );
	$this->assertSame( 'Lorem Ipsum', $revContent->serialize(), 'revision content' );
	$this->assertTrue( $rev->isMinor(), 'RevisionRecord::isMinor()' );

	// were the WikiPage and Title objects updated?
	$this->assertTrue( $page->exists(), 'WikiPage::exists()' );
	$this->assertTrue( $title->exists(), 'Title::exists()' );
	$this->assertSame( $rev->getId(), $page->getLatest(), 'WikiPage::getLatest()' );
	$this->assertNotNull( $page->getRevisionRecord(), 'WikiPage::getRevisionRecord()' );

	// re-load
	$page2 = $wikiPageFactory->newFromTitle( $title );
	$this->assertTrue( $page2->exists(), 'WikiPage::exists()' );
	$this->assertSame( $rev->getId(), $page2->getLatest(), 'WikiPage::getLatest()' );
	$this->assertNotNull( $page2->getRevisionRecord(), 'WikiPage::getRevisionRecord()' );

	// Check RC entry
	$rc = $this->getRecentChangeFor( $rev->getId() );
	$this->assertNotNull( $rc, 'RecentChange' );

	// check site stats - this asserts that derived data updates where run.
	$stats = $this->getDb()->newSelectQueryBuilder()
	->select( '*' )
	->from( 'site_stats' )
	->where( '1=1' )
	->fetchRow();
	$this->assertSame( $oldStats->ss_total_pages + 1, (int)$stats->ss_total_pages );
	$this->assertSame( $oldStats->ss_total_edits + 1, (int)$stats->ss_total_edits );

	// re-edit with same content - should be a "null-edit"
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, $content );

	$summary = CommentStoreComment::newUnsavedComment( 're-edit' );
	$rev = $updater->saveRevision( $summary );
	$status = $updater->getStatus();

	$this->assertNull( $rev, 'getNewRevision()' );
	$this->assertNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertFalse( $updater->wasRevisionCreated(), 'wasRevisionCreated' );
	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertStatusWarning( 'edit-no-change', $status );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	* @covers \MediaWiki\Page\WikiPage::newPageUpdater()
	*/
	public function testUpdatePage() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );
	$this->insertPage( $title );
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	$page = $wikiPageFactory->newFromTitle( $title );
	$parentId = $page->getLatest();

	$updater = $page->newPageUpdater( $user );

	$oldStats = $this->getDb()->newSelectQueryBuilder()
	->select( '*' )
	->from( 'site_stats' )
	->where( '1=1' )
	->fetchRow();

	$updater->setOriginalRevisionId( 7 );

	$this->assertFalse( $updater->hasEditConflict( $parentId ), 'hasEditConflict' );
	$this->assertTrue( $updater->hasEditConflict( $parentId - 1 ), 'hasEditConflict' );
	$this->assertTrue( $updater->hasEditConflict( 0 ), 'hasEditConflict' );

	// TODO: MCR: test additional slots
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem Ipsum' ) );

	// Check that prepareUpdate() does not fail, and the flag is applied.
	$updater->prepareUpdate( EDIT_MINOR );

	// TODO: test all flags for saveRevision()!
	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$rev = $updater->saveRevision( $summary );

	$this->assertNotNull( $rev );
	$this->assertSame( $parentId, $rev->getParentId() );
	$this->assertSame( $summary->text, $rev->getComment( RevisionRecord::RAW )->text );
	$this->assertSame( $user->getName(), $rev->getUser( RevisionRecord::RAW )->getName() );

	$this->assertTrue( $updater->wasCommitted(), 'wasCommitted()' );
	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertTrue( $updater->getStatus()->isOK(), 'getStatus()->isOK()' );
	$this->assertFalse( $updater->isNew(), 'isNew()' );
	$this->assertNotNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertInstanceOf(
	RevisionRecord::class,
	$updater->getStatus()->getNewRevision()
	);
	$this->assertTrue( $updater->wasRevisionCreated(), 'wasRevisionCreated()' );

	// check the EditResult object
	$this->assertSame( 7, $updater->getEditResult()->getOriginalRevisionId(),
	'EditResult::getOriginalRevisionId()' );
	$this->assertSame( 0, $updater->getEditResult()->getUndidRevId(),
	'EditResult::getUndidRevId()' );
	$this->assertFalse( $updater->getEditResult()->isNew(), 'EditResult::isNew()' );
	$this->assertFalse( $updater->getEditResult()->isRevert(), 'EditResult::isRevert()' );

	// TODO: Test null revision (with different user): new revision!

	$rev = $updater->getNewRevision();
	$revContent = $rev->getContent( SlotRecord::MAIN );
	$this->assertSame( 'Lorem Ipsum', $revContent->serialize(), 'revision content' );
	$this->assertTrue( $rev->isMinor(), 'RevisionRecord::isMinor()' );

	// were the WikiPage and Title objects updated?
	$this->assertTrue( $page->exists(), 'WikiPage::exists()' );
	$this->assertTrue( $title->exists(), 'Title::exists()' );
	$this->assertSame( $rev->getId(), $page->getLatest(), 'WikiPage::getLatest()' );
	$this->assertNotNull( $page->getRevisionRecord(), 'WikiPage::getRevisionRecord()' );

	// re-load
	$page2 = $wikiPageFactory->newFromTitle( $title );
	$this->assertTrue( $page2->exists(), 'WikiPage::exists()' );
	$this->assertSame( $rev->getId(), $page2->getLatest(), 'WikiPage::getLatest()' );
	$this->assertNotNull( $page2->getRevisionRecord(), 'WikiPage::getRevisionRecord()' );

	// Check RC entry
	$rc = $this->getRecentChangeFor( $rev->getId() );
	$this->assertNotNull( $rc, 'RecentChange' );

	// re-edit
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( 'dolor sit amet' ) );

	$summary = CommentStoreComment::newUnsavedComment( 're-edit' );
	$updater->saveRevision( $summary );
	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertTrue( $updater->getStatus()->isOK(), 'getStatus()->isOK()' );
	$this->assertNotNull( $updater->getNewRevision(), 'getNewRevision()' );

	$topRevisionId = $updater->getNewRevision()->getId();

	// perform a null edit
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( 'dolor sit amet' ) );
	$summary = CommentStoreComment::newUnsavedComment( 'null edit' );
	$updater->saveRevision( $summary );

	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertTrue( $updater->getStatus()->isOK(), 'getStatus()->isOK()' );
	$this->assertFalse( $updater->wasRevisionCreated(), 'wasRevisionCreated()' );
	$this->assertTrue(
	$updater->getEditResult()->isNullEdit(),
	'getEditResult()->isNullEdit()'
	);
	$this->assertSame(
	$topRevisionId,
	$updater->getEditResult()->getOriginalRevisionId(),
	'getEditResult()->getOriginalRevisionId()'
	);

	// check site stats - this asserts that derived data updates where run.
	$stats = $this->getDb()->newSelectQueryBuilder()
	->select( '*' )
	->from( 'site_stats' )
	->where( '1=1' )
	->fetchRow();
	$this->assertNotNull( $stats, 'site_stats' );
	$this->assertSame( $oldStats->ss_total_pages + 0, (int)$stats->ss_total_pages );
	$this->assertSame( $oldStats->ss_total_edits + 2, (int)$stats->ss_total_edits );
	}

	/**
	* Regression test for T379152
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testRevisionFromEditComplete() {
	$user = $this->getTestUser()->getUser();
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();
	$tagsStore = $this->getServiceContainer()->getChangeTagsStore();

	$this->expectHook(
	'RevisionFromEditComplete', 2,
	static function ( $wikiPage, $rev, $originalRevId, $user, &$tags ) {
	$tags[] = ( $rev->getParentId() ? 'test_updated' : 'test_created' );
	}
	);

	$title = $this->getDummyTitle( __METHOD__ );
	$page = $wikiPageFactory->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );

	$content = new TextContent( 'Lorem Ipsum' );
	$updater->setContent( SlotRecord::MAIN, $content );

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$rev = $updater->saveRevision( $summary );

	$this->assertArrayContains(
	[ 'test_created' ],
	$tagsStore->getTags( $this->getDb(), null, $rev->getId() )
	);

	// Now, try an update
	$page = $wikiPageFactory->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );

	$content = new TextContent( 'Lorem Ipsum dolor sit amet' );
	$updater->setContent( SlotRecord::MAIN, $content );

	$summary = CommentStoreComment::newUnsavedComment( 'Next test' );
	$rev = $updater->saveRevision( $summary );

	$this->assertArrayContains(
	[ 'test_updated' ],
	$tagsStore->getTags( $this->getDb(), null, $rev->getId() )
	);
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::saveDummyRevision()
	*/
	public function testDummyRevision() {
	$page = $this->getExistingTestPage();
	$calls = [];

	$this->setTemporaryHook(
	'RevisionFromEditComplete',
	static function () use ( &$calls ) {
	$calls[] = 'RevisionFromEditComplete';
	}
	);

	$user = $this->getTestUser()->getUser();
	$updater = $page->newPageUpdater( $user );

	$oldRevId = $page->getLatest();

	$rev = $updater->saveDummyRevision( 'test', EDIT_MINOR );

	$this->assertNotSame( $oldRevId, $rev->getId() );
	$this->assertSame( $page->getLatest(), $rev->getId() );
	$this->assertTrue( $rev->isMinor(), 'isMinor' );

	$this->assertArrayContains(
	[ 'RevisionFromEditComplete' ],
	$calls
	);
	}

	private function makeDomainEventSourceListener(
	array $flags,
	string $cause,
	UserIdentity $performer,
	?RevisionRecord $old,
	$revisionChange = true,
	$contentChange = true,
	$silent = false
	) {
	return static function ( PageRevisionUpdatedEvent $event ) use (
	&$counter, $flags, $cause, $performer, $old,
	$revisionChange, $contentChange, $silent
	) {
	Assert::assertSame(
	$contentChange,
	$event->isEffectiveContentChange(),
	'isEffectiveContentChange'
	);
	Assert::assertSame( // not dummy, but could be null edit
	$contentChange \|\| !$revisionChange,
	$event->isNominalContentChange(),
	'isNominalContentChange'
	);
	Assert::assertSame(
	$revisionChange,
	$event->changedLatestRevisionId(),
	'changedLatestRevisionId'
	);
	Assert::assertSame( // null edits
	!$revisionChange,
	$event->isReconciliationRequest(),
	'isReconciliationRequest'
	);
	Assert::assertSame(
	$old === null,
	$event->isCreation(),
	'isCreation'
	);
	Assert::assertSame(
	$silent,
	$event->isSilent(),
	'isSilent'
	);
	Assert::assertSame(
	$cause,
	$event->getCause(),
	'getCause'
	);
	Assert::assertSame(
	$performer,
	$event->getPerformer(),
	'getPerformer'
	);
	Assert::assertSame(
	$event->getLatestRevisionAfter()->getUser(),
	$event->getAuthor(),
	'getAuthor'
	);

	Assert::assertNotNull(
	$event->getEditResult(),
	'getEditResult'
	);

	if ( $old ) {
	Assert::assertSame(
	$old->getId(), $event->getLatestRevisionBefore()->getId(), 'getOldRevision'
	);
	} else {
	Assert::assertNull( $event->getLatestRevisionBefore(), 'getOldRevision' );
	}

	foreach ( $flags as $name => $value ) {
	Assert::assertSame( $value, $event->$name(), $name );
	}
	};
	}

	public function testEventEmission_new() {
	$user = $this->getTestUser()->getUser();
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	$title = $this->getDummyTitle( __METHOD__ );
	$page = $wikiPageFactory->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );

	$content = new TextContent( 'Lorem Ipsum' );
	$updater->setContent( SlotRecord::MAIN, $content );

	$this->expectDomainEvent(
	PageRevisionUpdatedEvent::TYPE, 1,
	$this->makeDomainEventSourceListener(
	[], PageRevisionUpdatedEvent::CAUSE_EDIT, $user, null
	)
	);

	$this->expectHook( 'RevisionFromEditComplete', 1 );
	$this->expectHook( 'PageSaveComplete', 1 );

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$updater->saveRevision( $summary );
	}

	public function testEventEmission_edit() {
	$page = $this->getExistingTestPage();
	$user = $this->getTestUser()->getUser();

	$updater = $page->newPageUpdater( $user );

	$content = new TextContent( 'Lorem Ipsum' );
	$updater->setContent( SlotRecord::MAIN, $content );

	$this->expectDomainEvent(
	PageRevisionUpdatedEvent::TYPE, 1,
	$this->makeDomainEventSourceListener(
	[], PageRevisionUpdatedEvent::CAUSE_EDIT,
	$user, $page->getRevisionRecord()
	)
	);

	// Also check that we can receive the event under its legacy name (T388588)
	$this->expectDomainEvent(
	'PageUpdated', 1,
	$this->makeDomainEventSourceListener(
	[], PageRevisionUpdatedEvent::CAUSE_EDIT,
	$user, $page->getRevisionRecord()
	)
	);

	$this->expectHook( 'RevisionFromEditComplete', 1 );
	$this->expectHook( 'PageSaveComplete', 1 );

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$updater->saveRevision( $summary );
	}

	public function testEventEmission_implicit() {
	$page = $this->getExistingTestPage();
	$user = $this->getTestUser()->getUser();

	$updater = $page->newPageUpdater( $user );

	$content = new TextContent( 'Lorem Ipsum' );
	$updater->setContent( SlotRecord::MAIN, $content );
	$updater->setFlags( EDIT_IMPLICIT );

	$this->expectDomainEvent(
	PageRevisionUpdatedEvent::TYPE, 1,
	$this->makeDomainEventSourceListener(
	[ 'isImplicit' => true ],
	PageRevisionUpdatedEvent::CAUSE_EDIT,
	$user,
	$page->getRevisionRecord()
	)
	);

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$updater->saveRevision( $summary );
	}

	public function testEventEmission_null() {
	$page = $this->getExistingTestPage();
	$user = $this->getTestUser()->getUser();

	$updater = $page->newPageUpdater( $user );

	$this->expectDomainEvent(
	PageRevisionUpdatedEvent::TYPE, 1,
	$this->makeDomainEventSourceListener(
	[], PageRevisionUpdatedEvent::CAUSE_EDIT,
	$user, $page->getRevisionRecord(), false, false
	)
	);

	$this->expectHook( 'RevisionFromEditComplete', 0 );
	$this->expectHook( 'PageSaveComplete', 1 );

	// null-edit
	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$updater->saveRevision( $summary );
	}

	public function testEventEmission_dummy() {
	$page = $this->getExistingTestPage();
	$user = $this->getTestUser()->getUser();

	$updater = $page->newPageUpdater( $user );

	$this->expectDomainEvent(
	PageRevisionUpdatedEvent::TYPE, 1,
	$this->makeDomainEventSourceListener(
	[], PageRevisionUpdatedEvent::CAUSE_UNDELETE,
	$user, $page->getRevisionRecord(), true, false, true
	)
	);

	$this->expectHook( 'RevisionFromEditComplete', 1 );
	$this->expectHook( 'PageSaveComplete', 1 );

	// dummy revision
	$updater->setCause( PageRevisionUpdatedEvent::CAUSE_UNDELETE );
	$updater->saveDummyRevision( 'Just a test', EDIT_SILENT \| EDIT_MINOR );
	}

	public function testEventEmission_revert() {
	$page = $this->getExistingTestPage();
	$originalContent = $page->getContent();

	$this->editPage( $page, 'Other content for ' . __METHOD__ );
	$this->assertFalse( $page->getContent()->equals( $originalContent ) );

	$user = $this->getTestUser()->getUser();
	$updater = $page->newPageUpdater( $user );

	$this->expectDomainEvent(
	PageRevisionUpdatedEvent::TYPE, 1,
	$this->makeDomainEventSourceListener(
	[ 'isRevert' => true ], PageRevisionUpdatedEvent::CAUSE_EDIT,
	$user, $page->getRevisionRecord()
	)
	);

	$this->expectHook( 'RevisionFromEditComplete', 1 );
	$this->expectHook( 'PageSaveComplete', 1 );

	// revert to original content
	$updater->setContent( SlotRecord::MAIN, $originalContent );
	$updater->markAsRevert( EditResult::REVERT_MANUAL, $page->getLatest() );
	$updater->saveRevision( 'Just a test' );
	}

	public function testEventEmission_derived() {
	$page = $this->getExistingTestPage();
	$user = $this->getTestUser()->getUser();

	$updater = $page->newPageUpdater( $user );

	$this->expectDomainEvent( PageRevisionUpdatedEvent::TYPE, 0 );

	$this->expectHook( 'RevisionFromEditComplete', 0 );

	// NOTE: it's not clear whether PageSaveComplete should relaly be fired here
	$this->expectHook( 'PageSaveComplete', 1 );

	// derived slot update
	$content = new WikitextContent( 'A' );
	$derived = SlotRecord::newDerived( 'derivedslot', $content );
	$updater->setSlot( $derived );
	$updater->updateRevision();
	}

	public static function provideUpdatePropagation() {
	static $counter = 1;
	$name = strtr( __METHOD__, '\\:', '--' ) . $counter++;

	yield 'article' => [ PageIdentityValue::localIdentity( 0, NS_MAIN, $name ) ];
	yield 'user talk' => [
	PageIdentityValue::localIdentity( 0, NS_USER_TALK, $name ),
	null,
	$name,
	];
	yield 'message' => [ PageIdentityValue::localIdentity( 0, NS_MEDIAWIKI, $name ) ];
	yield 'script' => [
	PageIdentityValue::localIdentity( 0, NS_USER, "$name/common.js" ),
	new JavaScriptContent( 'console.log("hi")' ),
	];
	}

	private function makeUser( string $name ) {
	$user = $this->getServiceContainer()->getUserFactory()
	->newFromName( $name );

	$user->addToDatabase();
	return $user;
	}

	/**
	* Test update propagation.
	* Includes regression test for T381225
	* @dataProvider provideUpdatePropagation
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testUpdatePropagation( PageIdentity $title, $content = null, $userName = null ) {
	if ( $userName ) {
	// For testing talk page behavior, the corresponding user must exist.
	$this->makeUser( $userName );
	}

	$user = $this->getTestUser()->getUser();
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	$page = $wikiPageFactory->newFromTitle( $title );
	$content ??= new TextContent( 'Lorem Ipsum' );

	$this->expectChangeTrackingUpdates(
	1, 0, 1,
	$page->getNamespace() === NS_USER_TALK ? 1 : 0,
	1
	);

	$this->expectSearchUpdates( 1 );
	$this->expectLocalizationUpdate( $page->getNamespace() === NS_MEDIAWIKI ? 1 : 0 );
	$this->expectResourceLoaderUpdates(
	$content->getModel() === CONTENT_MODEL_JAVASCRIPT ? 1 : 0
	);

	// Perform edit
	$updater = $page->newPageUpdater( $user );
	$updater->setContent( SlotRecord::MAIN, $content );

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$updater->saveRevision( $summary );

	// NOTE: assertions are applied by the spies installed earlier.
	$this->runDeferredUpdates();
	}

	/**
	* Test update propagation for null edits.
	* @dataProvider provideUpdatePropagation
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testUpdatePropagation_null( PageIdentity $title, $content = null, $userName = null ) {
	if ( $userName ) {
	// For testing talk page behavior, the corresponding user must exist.
	$this->makeUser( $userName );
	}

	$user = $this->getTestUser()->getUser();
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	$wikiPageFactory->newFromTitle( $title );
	$content ??= new TextContent( 'Lorem Ipsum' );
	$this->editPage( $title, $content );

	// Flush...
	$this->runJobs();
	$page = $wikiPageFactory->newFromTitle( $title );

	// Null edits should not go into recentchanges, should not
	// increment counters, and should not trigger talk page notifications.
	$this->expectChangeTrackingUpdates( 0, 0, 0, 0, 0 );

	// Update derived data on null edits
	$this->expectSearchUpdates( 1 );
	$this->expectLocalizationUpdate(
	$page->getNamespace() === NS_MEDIAWIKI ? 1 : 0
	);

	// NOTE: The resource loader cache is currently purged twice
	// for null edits. That's not necessary and may change.
	$this->expectResourceLoaderUpdates(
	$content->getModel() === CONTENT_MODEL_JAVASCRIPT ? 2 : 0
	);

	// Do null edit
	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$updater->saveRevision( $summary );
	}

	/**
	* Test update propagation for dummy revisions.
	* @dataProvider provideUpdatePropagation
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testUpdatePropagation_dummy( PageIdentity $title, $content = null, $userName = null ) {
	if ( $userName ) {
	// For testing talk page behavior, the corresponding user must exist.
	$this->makeUser( $userName );
	}

	$user = $this->getTestUser()->getUser();
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	$wikiPageFactory->newFromTitle( $title );
	$content ??= new TextContent( 'Lorem Ipsum' );
	$this->editPage( $title, $content );

	// Flush...
	$this->runJobs();
	$page = $wikiPageFactory->newFromTitle( $title );

	// Silent dummy revisions should not go into recentchanges,
	// should not increment counters, and should not trigger talk page
	// notifications.
	$this->expectChangeTrackingUpdates( 0, 0, 0, 0, 0 );

	// Do not update derived data on dummy revisions!
	$this->expectSearchUpdates( 0 );
	$this->expectLocalizationUpdate( 0 );
	$this->expectResourceLoaderUpdates( 0 );

	// Create dummy revision
	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$updater->setForceEmptyRevision( true ); // dummy revision, not null edit
	$updater->saveRevision( $summary, EDIT_SUPPRESS_RC );
	}

	public function testSetForceEmptyRevisionSetsOriginalRevisionId() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );
	$this->insertPage( $title );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$parentId = $page->getLatest();
	$updater = $page->newPageUpdater( $user );
	$updater->setForceEmptyRevision( true );
	// Saving without changing the content should now create a new revisiopns
	$summary = CommentStoreComment::newUnsavedComment( 'dummy revision' );
	$rev = $updater->saveRevision( $summary );
	$status = $updater->getStatus();
	$this->assertNotNull( $rev, 'getNewRevision()' );
	$this->assertNotNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertNotSame( $parentId, $rev->getId(), 'new revision ID' );
	$this->assertTrue( $updater->wasRevisionCreated(), 'wasRevisionCreated' );
	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertStatusGood( $status );
	// Setting setForceEmptyRevision causes the original revision to be set.
	$this->assertEquals( $parentId, $updater->getEditResult()->getOriginalRevisionId() );
	}

	public function testSetForceEmptyRevisionCausesSaveToFailWithChangedContent() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );
	$this->insertPage( $title );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );
	$updater->setForceEmptyRevision( true );
	// Setting setForceEmptyRevision causes saveRevision() to fail if the content is changed.
	// The positive case with setForceEmptyRevision() causing a new revision to be created
	// is tested
	$this->expectException( LogicException::class );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Changed Content' ) );
	$summary = CommentStoreComment::newUnsavedComment( 'dummy revision' );
	$updater->saveRevision( $summary );
	}

	public function testRevert() {
	// Setup a page with some edits
	$page = $this->getExistingTestPage( __METHOD__ );

	$user = $this->getTestUser()->getUser();

	$summary = CommentStoreComment::newUnsavedComment( '1' );
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( '1' ) );
	$updater->saveRevision( $summary );
	$revId1 = $updater->getNewRevision()->getId();

	$summary = CommentStoreComment::newUnsavedComment( '2' );
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( '2' ) );
	$updater->saveRevision( $summary );
	$revId2 = $updater->getNewRevision()->getId();

	// Perform a rollback
	$updater = $page->newPageUpdater( $this->getTestSysop()->getUser() )
	->setContent( SlotRecord::MAIN, new TextContent( '1' ) )
	->markAsRevert( EditResult::REVERT_ROLLBACK, $revId2, $revId1 );
	$summary = CommentStoreComment::newUnsavedComment( 'revert' );
	$updater->saveRevision( $summary );

	// Do some basic assertions on PageUpdater
	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertTrue( $updater->getStatus()->isOK(), 'getStatus()->isOK()' );

	$editResult = $updater->getEditResult();
	$this->assertNotNull( $editResult, 'getEditResult()' );
	$this->assertTrue( $editResult->isRevert(), 'EditResult::isRevert()' );
	$this->assertTrue( $editResult->isExactRevert(), 'EditResult::isExactRevert()' );
	$this->assertSame(
	$revId1,
	$editResult->getOriginalRevisionId(),
	'EditResult::getOriginalRevisionId()'
	);
	$this->assertSame(
	EditResult::REVERT_ROLLBACK,
	$editResult->getRevertMethod(),
	'EditResult::getRevertMethod()'
	);
	$this->assertSame(
	$revId2,
	$editResult->getOldestRevertedRevisionId(),
	'EditResult::getOldestRevertedRevisionId()'
	);
	$this->assertSame(
	$revId2,
	$editResult->getNewestRevertedRevisionId(),
	'EditResult::getNewestRevertedRevisionId()'
	);

	// Ensure all deferred updates are run
	DeferredUpdates::doUpdates();

	// Retrieve the mw-rollback change tag and verify it
	$newRevId = $updater->getNewRevision()->getId();
	$this->newSelectQueryBuilder()
	->select( 'ct_params' )
	->from( 'change_tag' )
	->where( [ 'ct_rev_id' => $newRevId ] )
	->assertFieldValue( FormatJson::encode( $editResult ) );
	}

	/**
	* Creates a revision in the database.
	*
	* @param WikiPage $page
	* @param string\|Message\|CommentStoreComment $summary
	* @param null\|string\|Content $content
	*
	* @return RevisionRecord\|null
	*/
	private function createRevision( WikiPage $page, $summary, $content = null ) {
	$user = $this->getTestUser()->getUser();

	$comment = CommentStoreComment::newUnsavedComment( $summary );

	if ( !$content instanceof Content ) {
	$content = new TextContent( $content ?? $summary );
	}

	return $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, $content )
	->saveRevision( $comment );
	}

	/**
	* Verify that MultiContentSave hook is called by saveRevision() with correct parameters.
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testMultiContentSaveHook() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );

	// TODO: MCR: test additional slots
	$slots = [
	SlotRecord::MAIN => new TextContent( 'Lorem Ipsum' )
	];

	// start editing non-existing page
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );
	foreach ( $slots as $slot => $content ) {
	$updater->setContent( $slot, $content );
	}

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );

	$expected = [
	'user' => $user,
	'title' => $title,
	'slots' => $slots,
	'summary' => $summary
	];
	$hookFired = false;
	$this->expectHook( 'MultiContentSave', 1,
	function ( RenderedRevision $renderedRevision, UserIdentity $user,
	$summary, $flags, Status $hookStatus
	) use ( &$hookFired, $expected ) {
	$hookFired = true;

	$this->assertSame( $expected['summary'], $summary );
	$this->assertSame( EDIT_NEW, $flags );

	$this->assertTrue(
	$expected['title']->isSamePageAs( $renderedRevision->getRevision()->getPage() )
	);
	$this->assertTrue(
	$expected['title']->isSameLinkAs( $renderedRevision->getRevision()->getPageAsLinkTarget() )
	);

	$slots = $renderedRevision->getRevision()->getSlots();
	foreach ( $expected['slots'] as $slot => $content ) {
	$this->assertSame( $content, $slots->getSlot( $slot )->getContent() );
	}

	// Don't abort this edit.
	return true;
	}
	);

	$rev = $updater->saveRevision( $summary );
	$this->assertTrue( $hookFired, "MultiContentSave hook wasn't called." );
	$this->assertNotNull( $rev,
	"MultiContentSave returned true, but revision wasn't created." );
	}

	/**
	* Verify that MultiContentSave hook can abort saveRevision() by returning false.
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testMultiContentSaveHookAbort() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );

	// start editing non-existing page
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( 'Lorem Ipsum' ) );

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );

	$expectedError = 'aborted-by-test-hook';
	$this->expectHook( 'MultiContentSave', 1,
	static function ( RenderedRevision $renderedRevision, UserIdentity $user,
	$summary, $flags, Status $hookStatus
	) use ( $expectedError ) {
	$hookStatus->fatal( $expectedError );

	// Returning false should disallow saveRevision() to continue saving this revision.
	return false;
	}
	);

	$rev = $updater->saveRevision( $summary );
	$this->assertNull( $rev,
	"MultiContentSave returned false, but revision was still created." );

	$status = $updater->getStatus();
	$this->assertStatusError( $expectedError, $status,
	"MultiContentSave returned false, but Status is not fatal." );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::grabParentRevision()
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testCompareAndSwapFailure() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	// start editing non-existing page
	$page = $wikiPageFactory->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );
	$updater->grabParentRevision();

	// create page concurrently
	$concurrentPage = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$this->createRevision( $concurrentPage, __METHOD__ . '-one' );

	// try creating the page - should trigger CAS failure.
	$summary = CommentStoreComment::newUnsavedComment( 'create?!' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$updater->saveRevision( $summary );
	$status = $updater->getStatus();

	$this->assertFalse( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertStatusError( 'edit-already-exists', $status, 'edit-conflict' );

	// start editing existing page
	$page = $wikiPageFactory->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );
	$updater->grabParentRevision();

	// update page concurrently
	$concurrentPage = $wikiPageFactory->newFromTitle( $title );
	$this->createRevision( $concurrentPage, __METHOD__ . '-two' );

	// try creating the page - should trigger CAS failure.
	$summary = CommentStoreComment::newUnsavedComment( 'edit?!' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'dolor sit amet' ) );
	$updater->saveRevision( $summary );
	$status = $updater->getStatus();

	$this->assertFalse( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertStatusError( 'edit-conflict', $status, 'edit-conflict' );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testFailureOnEditFlags() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );

	// start editing non-existing page
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );

	// update with EDIT_UPDATE flag should fail
	$summary = CommentStoreComment::newUnsavedComment( 'udpate?!' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$updater->saveRevision( $summary, EDIT_UPDATE );
	$status = $updater->getStatus();

	$this->assertFalse( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertStatusError( 'edit-gone-missing', $status, 'edit-gone-missing' );

	// create the page
	$this->createRevision( $page, __METHOD__ );

	// update with EDIT_NEW flag should fail
	$summary = CommentStoreComment::newUnsavedComment( 'create?!' );
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( 'dolor sit amet' ) );
	$updater->saveRevision( $summary, EDIT_NEW );
	$status = $updater->getStatus();

	$this->assertFalse( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertStatusError( 'edit-already-exists', $status, 'edit-already-exists' );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*/
	public function testFailureOnBadContentModel() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );

	// start editing non-existing page
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );

	// plain text content should fail in aux slot (the main slot doesn't care)
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( 'Main Content' ) )
	->setContent( 'aux', new TextContent( 'Aux Content' ) );

	$summary = CommentStoreComment::newUnsavedComment( 'udpate?!' );
	$updater->saveRevision( $summary, EDIT_UPDATE );
	$status = $updater->getStatus();

	$this->assertFalse( $updater->wasSuccessful(), 'wasSuccessful()' );
	$this->assertNull( $updater->getNewRevision(), 'getNewRevision()' );
	$this->assertStatusError( 'content-not-allowed-here', $status );
	}

	public static function provideSetRcPatrolStatus( $patrolled ) {
	yield [ RecentChange::PRC_UNPATROLLED ];
	yield [ RecentChange::PRC_AUTOPATROLLED ];
	}

	/**
	* @dataProvider provideSetRcPatrolStatus
	* @covers \MediaWiki\Storage\PageUpdater::setRcPatrolStatus()
	*/
	public function testSetRcPatrolStatus( $patrolled ) {
	$revisionStore = $this->getServiceContainer()->getRevisionStore();

	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );

	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$summary = CommentStoreComment::newUnsavedComment( 'Lorem ipsum ' . $patrolled );
	$rev = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum ' . $patrolled ) )
	->setRcPatrolStatus( $patrolled )
	->saveRevision( $summary );

	$rc = $revisionStore->getRecentChange( $rev );
	$this->assertEquals( $patrolled, $rc->getAttribute( 'rc_patrolled' ) );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::makeNewRevision()
	*/
	public function testStalePageID() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );
	$summary = CommentStoreComment::newUnsavedComment( 'testing...' );
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();

	// Create page
	$page = $wikiPageFactory->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new TextContent( 'Content 1' ) );
	$updater->saveRevision( $summary, EDIT_NEW );
	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );

	// Create a clone of $title and $page.
	$title = Title::makeTitle( $title->getNamespace(), $title->getDBkey() );
	$page = $wikiPageFactory->newFromTitle( $title );

	// start editing existing page using bad page ID
	$updater = $page->newPageUpdater( $user );
	$updater->grabParentRevision();

	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Content 2' ) );

	// Force the article ID to something invalid,
	// to emulate confusion due to a page move.
	$title->resetArticleID( 886655 );

	@$updater->saveRevision( $summary, EDIT_UPDATE );

	$this->assertTrue( $updater->wasSuccessful(), 'wasSuccessful()' );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::inheritSlot()
	* @covers \MediaWiki\Storage\PageUpdater::setContent()
	*/
	public function testInheritSlot() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$rev1 = $updater->saveRevision( $summary, EDIT_NEW );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'two' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Foo Bar' ) );
	$rev2 = $updater->saveRevision( $summary, EDIT_UPDATE );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'three' );
	$updater->inheritSlot( $rev1->getSlot( SlotRecord::MAIN ) );
	$rev3 = $updater->saveRevision( $summary, EDIT_UPDATE );

	$this->assertNotSame( $rev1->getId(), $rev3->getId() );
	$this->assertNotSame( $rev2->getId(), $rev3->getId() );

	$main1 = $rev1->getSlot( SlotRecord::MAIN );
	$main3 = $rev3->getSlot( SlotRecord::MAIN );

	$this->assertNotSame( $main1->getRevision(), $main3->getRevision() );
	$this->assertSame( $main1->getAddress(), $main3->getAddress() );
	$this->assertTrue( $main1->getContent()->equals( $main3->getContent() ) );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::setSlot()
	* @covers \MediaWiki\Storage\PageUpdater::updateRevision()
	*/
	public function testUpdatingDerivedSlot() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$updater->saveRevision( $summary, EDIT_NEW );

	// Clear pending jobs so the spies don't get confused
	$this->runJobs();

	$this->expectChangeTrackingUpdates( 0, 0, 0, 0, 0 );
	$this->expectSearchUpdates( 0 );

	$updater = $page->newPageUpdater( $user );
	$content = new WikitextContent( 'A' );
	$derived = SlotRecord::newDerived( 'derivedslot', $content );
	$updater->setSlot( $derived );
	$updater->updateRevision();

	$status = $updater->getStatus();
	$this->assertStatusGood( $status );
	$rev = $status->getNewRevision();
	$slot = $rev->getSlot( 'derivedslot' );
	$this->assertTrue( $slot->getContent()->equals( $content ) );

	// Make sure all events are processed so the spies are happy
	$this->runDeferredUpdates();
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::setSlot()
	* @covers \MediaWiki\Storage\PageUpdater::updateRevision()
	*/
	public function testUpdatingDerivedSlotCurrentRevision() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$rev1 = $updater->saveRevision( $summary, EDIT_NEW );

	$updater = $page->newPageUpdater( $user );
	$content = new WikitextContent( 'A' );
	$derived = SlotRecord::newDerived( 'derivedslot', $content );
	$updater->setSlot( $derived );
	$updater->updateRevision( $rev1->getId( $rev1->getWikiId() ) );

	$rev2 = $updater->getStatus()->getNewRevision();
	$slot = $rev2->getSlot( 'derivedslot' );
	$this->assertTrue( $slot->getContent()->equals( $content ) );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::setSlot()
	* @covers \MediaWiki\Storage\PageUpdater::updateRevision()
	*/
	public function testUpdatingDerivedSlotOldRevision() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$rev1 = $updater->saveRevision( $summary, EDIT_NEW );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'two' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Something different' ) );
	$updater->saveRevision( $summary, EDIT_UPDATE );

	$updater = $page->newPageUpdater( $user );
	$content = new WikitextContent( 'A' );
	$derived = SlotRecord::newDerived( 'derivedslot', $content );
	$updater->setSlot( $derived );
	$updater->updateRevision( $rev1->getId( $rev1->getWikiId() ) );

	$rev3 = $updater->getStatus()->getNewRevision();
	$slot = $rev3->getSlot( 'derivedslot' );
	$this->assertTrue( $slot->getContent()->equals( $content ) );
	}

	// TODO: MCR: test adding multiple slots, inheriting parent slots, and removing slots.

	public function testSetUseAutomaticEditSummaries() {
	$this->setContentLang( 'qqx' );
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();
	$page = $wikiPageFactory->newFromTitle( $title );

	$updater = $page->newPageUpdater( $user )
	->setUseAutomaticEditSummaries( true )
	->setContent( SlotRecord::MAIN, new TextContent( 'Lorem Ipsum' ) );

	// empty comment triggers auto-summary
	$summary = CommentStoreComment::newUnsavedComment( '' );
	$updater->saveRevision( $summary, EDIT_AUTOSUMMARY );

	$rev = $updater->getNewRevision();
	$comment = $rev->getComment( RevisionRecord::RAW );
	$this->assertSame( '(autosumm-new: Lorem Ipsum)', $comment->text, 'comment text' );

	// check that this also works when blanking the page
	$updater = $page->newPageUpdater( $user )
	->setUseAutomaticEditSummaries( true )
	->setContent( SlotRecord::MAIN, new TextContent( '' ) );

	$summary = CommentStoreComment::newUnsavedComment( '' );
	$updater->saveRevision( $summary, EDIT_AUTOSUMMARY );

	$rev = $updater->getNewRevision();
	$comment = $rev->getComment( RevisionRecord::RAW );
	$this->assertSame( '(autosumm-blank)', $comment->text, 'comment text' );

	// check that we can also disable edit-summaries
	$title2 = $this->getDummyTitle( __METHOD__ . '/2' );
	$page2 = $wikiPageFactory->newFromTitle( $title2 );

	$updater = $page2->newPageUpdater( $user )
	->setUseAutomaticEditSummaries( false )
	->setContent( SlotRecord::MAIN, new TextContent( 'Lorem Ipsum' ) );

	$summary = CommentStoreComment::newUnsavedComment( '' );
	$updater->saveRevision( $summary, EDIT_AUTOSUMMARY );

	$rev = $updater->getNewRevision();
	$comment = $rev->getComment( RevisionRecord::RAW );
	$this->assertSame( '', $comment->text, 'comment text should still be blank' );

	// check that we don't do auto.summaries without the EDIT_AUTOSUMMARY flag
	$updater = $page2->newPageUpdater( $user )
	->setUseAutomaticEditSummaries( true )
	->setContent( SlotRecord::MAIN, new TextContent( '' ) );

	$summary = CommentStoreComment::newUnsavedComment( '' );
	$updater->saveRevision( $summary, 0 );

	$rev = $updater->getNewRevision();
	$comment = $rev->getComment( RevisionRecord::RAW );
	$this->assertSame( '', $comment->text, 'comment text' );
	}

	public static function provideSetUsePageCreationLog() {
	yield [ true, [ [ 'create', 'create' ] ] ];
	yield [ false, [] ];
	}

	/**
	* @dataProvider provideSetUsePageCreationLog
	* @covers \MediaWiki\RecentChanges\ChangeTrackingEventIngress
	*/
	public function testSetUsePageCreationLog( $use, $expected ) {
	$this->hideDeprecated( 'MediaWiki\Storage\PageUpdater::setUsePageCreationLog' );

	$services = $this->getServiceContainer();
	$ingress = ChangeTrackingEventIngress::newForTesting(
	$services->getChangeTagsStore(),
	$services->getUserEditTracker(),
	$services->getPermissionManager(),
	$services->getWikiPageFactory(),
	$services->getHookContainer(),
	$services->getUserNameUtils(),
	$services->getTalkPageNotificationManager(),
	$services->getMainConfig(),
	$services->getJobQueueGroup(),
	$services->getContentHandlerFactory()
	);

	$services->getDomainEventSource()
	->registerSubscriber( $ingress );

	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ . ( $use ? '_logged' : '_unlogged' ) );
	$page = $services->getWikiPageFactory()->newFromTitle( $title );

	$summary = CommentStoreComment::newUnsavedComment( 'cmt' );
	$updater = $page->newPageUpdater( $user )
	->setUsePageCreationLog( $use )
	->setContent( SlotRecord::MAIN, new TextContent( 'Lorem Ipsum' ) );

	$updater->saveRevision( $summary, EDIT_NEW );

	$rev = $updater->getNewRevision();
	$this->newSelectQueryBuilder()
	->select( [ 'log_type', 'log_action' ] )
	->from( 'logging' )
	->where( [ 'log_page' => $rev->getPageId() ] )
	->assertResultSet( $expected );
	}

	public static function provideMagicWords() {
	yield 'PAGEID' => [
	'Test {{PAGEID}} Test',
	static function ( RevisionRecord $rev ) {
	return $rev->getPageId();
	}
	];

	yield 'REVISIONID' => [
	'Test {{REVISIONID}} Test',
	static function ( RevisionRecord $rev ) {
	return $rev->getId();
	}
	];

	yield 'REVISIONUSER' => [
	'Test {{REVISIONUSER}} Test',
	static function ( RevisionRecord $rev ) {
	return $rev->getUser()->getName();
	}
	];

	yield 'REVISIONTIMESTAMP' => [
	'Test {{REVISIONTIMESTAMP}} Test',
	static function ( RevisionRecord $rev ) {
	return $rev->getTimestamp();
	}
	];

	yield 'subst:REVISIONUSER' => [
	'Test {{subst:REVISIONUSER}} Test',
	static function ( RevisionRecord $rev ) {
	return $rev->getUser()->getName();
	},
	'subst'
	];

	yield 'subst:PAGENAME' => [
	'Test {{subst:PAGENAME}} Test',
	static function ( RevisionRecord $rev ) {
	return 'PageUpdaterTest::testMagicWords';
	},
	'subst'
	];
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::saveRevision()
	*
	* Integration test for PageUpdater, DerivedPageDataUpdater, RevisionRenderer
	* and RenderedRevision, that ensures that magic words depending on revision meta-data
	* are handled correctly. Note that each magic word needs to be tested separately,
	* to assert correct behavior for each "vary" flag in the ParserOutput.
	*
	* @dataProvider provideMagicWords
	*/
	public function testMagicWords( $wikitext, $callback, $subst = false ) {
	$user = User::newFromName( 'A user for ' . __METHOD__ );
	$user->addToDatabase();

	$title = $this->getDummyTitle( __METHOD__ . '-' . $this->getName() );
	$this->insertPage( $title );

	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user )
	->setContent( SlotRecord::MAIN, new \MediaWiki\Content\WikitextContent( $wikitext ) );

	$summary = CommentStoreComment::newUnsavedComment( 'Just a test' );
	$rev = $updater->saveRevision( $summary, EDIT_UPDATE );

	if ( !$rev ) {
	$this->fail( $updater->getStatus()->getWikiText() );
	}

	$expected = strval( $callback( $rev ) );

	$output = $page->getParserOutput( ParserOptions::newFromAnon() );
	$html = $output->getRawText();
	$text = $rev->getContent( SlotRecord::MAIN )->serialize();

	if ( $subst ) {
	$this->assertStringContainsString( $expected, $text, 'In Wikitext' );
	}

	$this->assertStringContainsString( $expected, $html, 'In HTML' );
	}

	public function testChangeTagsSuppressRecentChange() {
	$page = PageIdentityValue::localIdentity( 0, NS_MAIN, __METHOD__ );
	$wikiPageFactory = $this->getServiceContainer()->getWikiPageFactory();
	$revision = $this->getServiceContainer()
	->getPageUpdaterFactory()
	->newPageUpdater(
	$wikiPageFactory->newFromTitle( $page ),
	$this->getTestUser()->getUser()
	)
	->setContent( SlotRecord::MAIN, new TextContent( 'Lorem Ipsum' ) )
	->addTag( 'foo' )
	->setFlags( EDIT_SUPPRESS_RC )
	->saveRevision( CommentStoreComment::newUnsavedComment( 'Comment' ) );
	$this->assertArrayEquals(
	[ 'foo' ],
	$this->getServiceContainer()->getChangeTagsStore()->getTags(
	$this->getDb(), null, $revision->getId()
	)
	);

	$revision2 = $this->getServiceContainer()
	->getPageUpdaterFactory()
	->newPageUpdater(
	$wikiPageFactory->newFromTitle( $page ),
	$this->getTestUser()->getUser()
	)
	->setContent( SlotRecord::MAIN, new TextContent( 'Other content' ) )
	->addTag( 'bar' )
	->setFlags( EDIT_SUPPRESS_RC )
	->saveRevision( CommentStoreComment::newUnsavedComment( 'Comment' ) );
	$this->assertArrayEquals(
	[ 'bar' ],
	$this->getServiceContainer()->getChangeTagsStore()->getTags(
	$this->getDb(), null, $revision2->getId()
	)
	);
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::prepareUpdate()
	* @covers \MediaWiki\Page\WikiPage::getCurrentUpdate()
	*/
	public function testPrepareUpdate() {
	$user = $this->getTestUser()->getUser();

	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );

	$this->assertSame( $page->getCurrentUpdate(), $updater->prepareUpdate() );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::preventChange
	* @covers \MediaWiki\Storage\PageUpdater::doModify
	* @covers \MediaWiki\Storage\PageUpdater::isChange
	*/
	public function testPreventChange_modify() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$updater = $page->newPageUpdater( $user );

	// Creation
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$updater->prepareUpdate();
	$rev = $updater->saveRevision( $summary, EDIT_NEW );
	$this->assertInstanceOf( RevisionRecord::class, $rev );

	// Null edit
	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$updater->prepareUpdate();
	$updater->preventChange();
	$this->assertFalse( $updater->isChange() );
	$rev = $updater->saveRevision( $summary );
	$this->assertNull( $rev );

	// Prevented edit
	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'dolor sit amet' ) );
	$updater->prepareUpdate();
	$updater->preventChange();
	$this->expectException( LogicException::class );
	$updater->saveRevision( $summary );
	}

	/**
	* @covers \MediaWiki\Storage\PageUpdater::preventChange
	* @covers \MediaWiki\Storage\PageUpdater::doCreate
	* @covers \MediaWiki\Storage\PageUpdater::isChange
	*/
	public function testPreventChange_create() {
	$user = $this->getTestUser()->getUser();
	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );

	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( 'Lorem ipsum' ) );
	$updater->prepareUpdate();
	$updater->preventChange();
	$this->assertTrue( $updater->isChange() );
	$this->expectException( LogicException::class );
	$updater->saveRevision( $summary, EDIT_NEW );
	}

	public function testUpdateAuthor() {
	$title = $this->getDummyTitle( __METHOD__ );
	$page = $this->getServiceContainer()->getWikiPageFactory()->newFromTitle( $title );
	$user = new User;
	$user->setName( 'PageUpdaterTest' );
	$updater = $page->newPageUpdater( $user );
	$summary = CommentStoreComment::newUnsavedComment( 'one' );
	$updater->setContent( SlotRecord::MAIN, new TextContent( '~~~~' ) );

	$user = User::createNew( $user->getName() );
	$updater->updateAuthor( $user );
	$rev = $updater->saveRevision( $summary, EDIT_NEW );
	$this->assertGreaterThan( 0, $rev->getUser()->getId() );
	}
	}

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