MessageCacheTest.php

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<?php
 
use MediaWiki\MediaWikiServices;
 
class MessageCacheTest extends MediaWikiLangTestCase {
 
    protected function setUp() {
        parent::setUp();
        $this->configureLanguages();
        MessageCache::destroyInstance();
        MessageCache::singleton()->enable();
    }
 
    protected function configureLanguages() {
        // for the test, we need the content language to be anything but English,
        // let's choose e.g. German (de)
        $this->setUserLang( 'de' );
        $this->setContentLang( 'de' );
    }
 
    function addDBDataOnce() {
        $this->configureLanguages();
 
        // Set up messages and fallbacks ab -> ru -> de
        $this->makePage( 'FallbackLanguageTest-Full', 'ab' );
        $this->makePage( 'FallbackLanguageTest-Full', 'ru' );
        $this->makePage( 'FallbackLanguageTest-Full', 'de' );
 
        // Fallbacks where ab does not exist
        $this->makePage( 'FallbackLanguageTest-Partial', 'ru' );
        $this->makePage( 'FallbackLanguageTest-Partial', 'de' );
 
        // Fallback to the content language
        $this->makePage( 'FallbackLanguageTest-ContLang', 'de' );
 
        // Add customizations for an existing message.
        $this->makePage( 'sunday', 'ru' );
 
        // Full key tests -- always want russian
        $this->makePage( 'MessageCacheTest-FullKeyTest', 'ab' );
        $this->makePage( 'MessageCacheTest-FullKeyTest', 'ru' );
 
        // In content language -- get base if no derivative
        $this->makePage( 'FallbackLanguageTest-NoDervContLang', 'de', 'de/none' );
    }
 
    protected function makePage( $title, $lang, $content = null ) {
        if ( $content === null ) {
            $content = $lang;
        }
        if ( $lang !== MediaWikiServices::getInstance()->getContentLanguage()->getCode() ) {
            $title = "$title/$lang";
        }
 
        $title = Title::newFromText( $title, NS_MEDIAWIKI );
        $wikiPage = new WikiPage( $title );
        $contentHandler = ContentHandler::makeContent( $content, $title );
        $wikiPage->doEditContent( $contentHandler, "$lang translation test case" );
    }
 
    public function testMessageFallbacks( $message, $lang, $expectedContent ) {
        $result = MessageCache::singleton()->get( $message, true, $lang );
        $this->assertEquals( $expectedContent, $result, "Message fallback failed." );
    }
 
    function provideMessagesForFallback() {
        return [
            [ 'FallbackLanguageTest-Full', 'ab', 'ab' ],
            [ 'FallbackLanguageTest-Partial', 'ab', 'ru' ],
            [ 'FallbackLanguageTest-ContLang', 'ab', 'de' ],
            [ 'FallbackLanguageTest-None', 'ab', false ],
 
            // Existing message with customizations on the fallbacks
            [ 'sunday', 'ab', 'амҽыш' ],
 
            // T48579
            [ 'FallbackLanguageTest-NoDervContLang', 'de', 'de/none' ],
            // UI language different from content language should only use de/none as last option
            [ 'FallbackLanguageTest-NoDervContLang', 'fit', 'de/none' ],
        ];
    }
 
    public function testReplaceMsg() {
        $messageCache = MessageCache::singleton();
        $message = 'go';
        $uckey = MediaWikiServices::getInstance()->getContentLanguage()->ucfirst( $message );
        $oldText = $messageCache->get( $message ); // "Ausführen"
 
        $dbw = wfGetDB( DB_MASTER );
        $dbw->startAtomic( __METHOD__ ); // simulate request and block deferred updates
        $messageCache->replace( $uckey, 'Allez!' );
        $this->assertEquals( 'Allez!',
            $messageCache->getMsgFromNamespace( $uckey, 'de' ),
            'Updates are reflected in-process immediately' );
        $this->assertEquals( 'Allez!',
            $messageCache->get( $message ),
            'Updates are reflected in-process immediately' );
        $this->makePage( 'Go', 'de', 'Race!' );
        $dbw->endAtomic( __METHOD__ );
 
        $this->assertEquals( 0,
            DeferredUpdates::pendingUpdatesCount(),
            'Post-commit deferred update triggers a run of all updates' );
 
        $this->assertEquals( 'Race!', $messageCache->get( $message ), 'Correct final contents' );
 
        $this->makePage( 'Go', 'de', $oldText );
        $messageCache->replace( $uckey, $oldText ); // deferred update runs immediately
        $this->assertEquals( $oldText, $messageCache->get( $message ), 'Content restored' );
    }
 
    public function testReplaceCache() {
        global $wgWANObjectCaches;
 
        // We need a WAN cache for this.
        $this->setMwGlobals( [
            'wgMainWANCache' => 'hash',
            'wgWANObjectCaches' => $wgWANObjectCaches + [
                'hash' => [
                    'class'    => WANObjectCache::class,
                    'cacheId'  => 'hash',
                    'channels' => []
                ]
            ]
        ] );
        $this->overrideMwServices();
 
        MessageCache::destroyInstance();
        $messageCache = MessageCache::singleton();
        $messageCache->enable();
 
        // Populate one key
        $this->makePage( 'Key1', 'de', 'Value1' );
        $this->assertEquals( 0,
            DeferredUpdates::pendingUpdatesCount(),
            'Post-commit deferred update triggers a run of all updates' );
        $this->assertEquals( 'Value1', $messageCache->get( 'Key1' ), 'Key1 was successfully edited' );
 
        // Screw up the database so MessageCache::loadFromDB() will
        // produce the wrong result for reloading Key1
        $this->db->delete(
            'page', [ 'page_namespace' => NS_MEDIAWIKI, 'page_title' => 'Key1' ], __METHOD__
        );
 
        // Populate the second key
        $this->makePage( 'Key2', 'de', 'Value2' );
        $this->assertEquals( 0,
            DeferredUpdates::pendingUpdatesCount(),
            'Post-commit deferred update triggers a run of all updates' );
        $this->assertEquals( 'Value2', $messageCache->get( 'Key2' ), 'Key2 was successfully edited' );
 
        // Now test that the second edit didn't reload Key1
        $this->assertEquals( 'Value1', $messageCache->get( 'Key1' ),
            'Key1 wasn\'t reloaded by edit of Key2' );
    }
 
    public function testNormalizeKey( $key, $expected ) {
        $actual = MessageCache::normalizeKey( $key );
        $this->assertEquals( $expected, $actual );
    }
 
    public function provideNormalizeKey() {
        return [
            [ 'Foo', 'foo' ],
            [ 'foo', 'foo' ],
            [ 'fOo', 'fOo' ],
            [ 'FOO', 'fOO' ],
            [ 'Foo bar', 'foo_bar' ],
            [ 'Ćab', 'ćab' ],
            [ 'Ćab_e 3', 'ćab_e_3' ],
            [ 'ĆAB', 'ćAB' ],
            [ 'ćab', 'ćab' ],
            [ 'ćaB', 'ćaB' ],
        ];
    }
 
    public function testNoDBAccess() {
        global $wgContLanguageCode;
 
        $dbr = wfGetDB( DB_REPLICA );
 
        MessageCache::singleton()->getMsgFromNamespace( 'allpages', $wgContLanguageCode );
 
        $this->assertEquals( 0, $dbr->trxLevel() );
        $dbr->setFlag( DBO_TRX, $dbr::REMEMBER_PRIOR ); // make queries trigger TRX
 
        MessageCache::singleton()->getMsgFromNamespace( 'go', $wgContLanguageCode );
 
        $dbr->restoreFlags();
 
        $this->assertEquals( 0, $dbr->trxLevel(), "No DB read queries" );
    }
}