MediaWikiLangTestCase.php

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<?php

abstract class MediaWikiLangTestCase extends MediaWikiTestCase {

    protected function setUp() {
        global $wgLanguageCode, $wgContLang;
        parent::setUp();

        if ( $wgLanguageCode != $wgContLang->getCode() ) {
            throw new MWException( "Error in MediaWikiLangTestCase::setUp(): " .
                "\$wgLanguageCode ('$wgLanguageCode') is different from " .
                "\$wgContLang->getCode() (" . $wgContLang->getCode() . ")" );
        }

        // HACK: Call getLanguage() so the real $wgContLang is cached as the user language
        // rather than our fake one. This is to avoid breaking other, unrelated tests.
        RequestContext::getMain()->getLanguage();

        $langCode = 'en'; # For mainpage to be 'Main Page'
        $langObj = Language::factory( $langCode );

        $this->setMwGlobals( array(
            'wgLanguageCode' => $langCode,
            'wgLang' => $langObj,
            'wgContLang' => $langObj,
        ) );

        MessageCache::singleton()->disable();
    }
}