OutputPageTest.php

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<?php
 
use Wikimedia\TestingAccessWrapper;
 
class OutputPageTest extends MediaWikiTestCase {
    const SCREEN_MEDIA_QUERY = 'screen and (min-width: 982px)';
    const SCREEN_ONLY_MEDIA_QUERY = 'only screen and (min-width: 982px)';
 
    // Ensure that we don't affect the global ResourceLoader state.
    protected function setUp() {
        parent::setUp();
        ResourceLoader::clearCache();
    }
    protected function tearDown() {
        parent::tearDown();
        ResourceLoader::clearCache();
    }
 
    public function testRedirect( $url, $code = null ) {
        $op = $this->newInstance();
        if ( isset( $code ) ) {
            $op->redirect( $url, $code );
        } else {
            $op->redirect( $url );
        }
        $expectedUrl = str_replace( "\n", '', $url );
        $this->assertSame( $expectedUrl, $op->getRedirect() );
        $this->assertSame( $expectedUrl, $op->mRedirect );
        $this->assertSame( $code ?? '302', $op->mRedirectCode );
    }
 
    public function provideRedirect() {
        return [
            [ 'http://example.com' ],
            [ 'http://example.com', '400' ],
            [ 'http://example.com', 'squirrels!!!' ],
            [ "a\nb" ],
        ];
    }
 
    public function testSetCopyrightUrl() {
        $op = $this->newInstance();
        $op->setCopyrightUrl( 'http://example.com' );
 
        $this->assertSame(
            Html::element( 'link', [ 'rel' => 'license', 'href' => 'http://example.com' ] ),
            $op->getHeadLinksArray()['copyright']
        );
    }
 
    // @todo How to test setStatusCode?
 
    public function testMetaTags() {
        $op = $this->newInstance();
        $op->addMeta( 'http:expires', '0' );
        $op->addMeta( 'keywords', 'first' );
        $op->addMeta( 'keywords', 'second' );
        $op->addMeta( 'og:title', 'Ta-duh' );
 
        $expected = [
            [ 'http:expires', '0' ],
            [ 'keywords', 'first' ],
            [ 'keywords', 'second' ],
            [ 'og:title', 'Ta-duh' ],
        ];
        $this->assertSame( $expected, $op->getMetaTags() );
 
        $links = $op->getHeadLinksArray();
        $this->assertContains( '<meta http-equiv="expires" content="0"/>', $links );
        $this->assertContains( '<meta name="keywords" content="first"/>', $links );
        $this->assertContains( '<meta name="keywords" content="second"/>', $links );
        $this->assertContains( '<meta property="og:title" content="Ta-duh"/>', $links );
        $this->assertArrayNotHasKey( 'meta-robots', $links );
    }
 
    public function testAddLink() {
        $op = $this->newInstance();
 
        $links = [
            [],
            [ 'rel' => 'foo', 'href' => 'http://example.com' ],
        ];
 
        foreach ( $links as $link ) {
            $op->addLink( $link );
        }
 
        $this->assertSame( $links, $op->getLinkTags() );
 
        $result = $op->getHeadLinksArray();
 
        foreach ( $links as $link ) {
            $this->assertContains( Html::element( 'link', $link ), $result );
        }
    }
 
    public function testSetCanonicalUrl() {
        $op = $this->newInstance();
        $op->setCanonicalUrl( 'http://example.comm' );
        $op->setCanonicalUrl( 'http://example.com' );
 
        $this->assertSame( 'http://example.com', $op->getCanonicalUrl() );
 
        $headLinks = $op->getHeadLinksArray();
 
        $this->assertContains( Html::element( 'link', [
            'rel' => 'canonical', 'href' => 'http://example.com'
        ] ), $headLinks );
 
        $this->assertNotContains( Html::element( 'link', [
            'rel' => 'canonical', 'href' => 'http://example.comm'
        ] ), $headLinks );
    }
 
    public function testAddScript() {
        $op = $this->newInstance();
        $op->addScript( 'some random string' );
 
        $this->assertContains( "\nsome random string\n", "\n" . $op->getBottomScripts() . "\n" );
    }
 
    public function testAddScriptFile() {
        $op = $this->newInstance();
        $op->addScriptFile( '/somescript.js' );
        $op->addScriptFile( '//example.com/somescript.js' );
 
        $this->assertContains(
            "\n" . Html::linkedScript( '/somescript.js', $op->getCSPNonce() ) .
                Html::linkedScript( '//example.com/somescript.js', $op->getCSPNonce() ) . "\n",
            "\n" . $op->getBottomScripts() . "\n"
        );
    }
 
    public function testAddDeprecatedScriptFileWarning() {
        $this->setExpectedException( PHPUnit_Framework_Error_Deprecated::class,
            'Use of OutputPage::addScriptFile was deprecated in MediaWiki 1.24.' );
 
        $op = $this->newInstance();
        $op->addScriptFile( 'ignored-script.js' );
    }
 
    public function testAddDeprecatedScriptFileNoOp() {
        $this->hideDeprecated( 'OutputPage::addScriptFile' );
        $op = $this->newInstance();
        $op->addScriptFile( 'ignored-script.js' );
 
        $this->assertNotContains( 'ignored-script.js', '' . $op->getBottomScripts() );
    }
 
    public function testAddInlineScript() {
        $op = $this->newInstance();
        $op->addInlineScript( 'let foo = "bar";' );
        $op->addInlineScript( 'alert( foo );' );
 
        $this->assertContains(
            "\n" . Html::inlineScript( "\nlet foo = \"bar\";\n", $op->getCSPNonce() ) . "\n" .
                Html::inlineScript( "\nalert( foo );\n", $op->getCSPNonce() ) . "\n",
            "\n" . $op->getBottomScripts() . "\n"
        );
    }
 
    // @todo How to test filterModules(), warnModuleTargetFilter(), getModules(), etc.?
 
    public function testSetTarget() {
        $op = $this->newInstance();
        $op->setTarget( 'foo' );
 
        $this->assertSame( 'foo', $op->getTarget() );
        // @todo What else?  Test some actual effect?
    }
 
    // @todo How to test addContentOverride(Callback)?
 
    public function testHeadItems() {
        $op = $this->newInstance();
        $op->addHeadItem( 'a', 'b' );
        $op->addHeadItems( [ 'c' => '<d>&amp;', 'e' => 'f', 'a' => 'q' ] );
        $op->addHeadItem( 'e', 'g' );
        $op->addHeadItems( 'x' );
 
        $this->assertSame( [ 'a' => 'q', 'c' => '<d>&amp;', 'e' => 'g', 'x' ],
            $op->getHeadItemsArray() );
 
        $this->assertTrue( $op->hasHeadItem( 'a' ) );
        $this->assertTrue( $op->hasHeadItem( 'c' ) );
        $this->assertTrue( $op->hasHeadItem( 'e' ) );
        $this->assertTrue( $op->hasHeadItem( '0' ) );
 
        $this->assertContains( "\nq\n<d>&amp;\ng\nx\n",
            '' . $op->headElement( $op->getContext()->getSkin() ) );
    }
 
    public function testHeadItemsParserOutput() {
        $op = $this->newInstance();
        $stubPO1 = $this->createParserOutputStub( 'getHeadItems', [ 'a' => 'b' ] );
        $op->addParserOutputMetadata( $stubPO1 );
        $stubPO2 = $this->createParserOutputStub( 'getHeadItems',
            [ 'c' => '<d>&amp;', 'e' => 'f', 'a' => 'q' ] );
        $op->addParserOutputMetadata( $stubPO2 );
        $stubPO3 = $this->createParserOutputStub( 'getHeadItems', [ 'e' => 'g' ] );
        $op->addParserOutput( $stubPO3 );
        $stubPO4 = $this->createParserOutputStub( 'getHeadItems', [ 'x' ] );
        $op->addParserOutputMetadata( $stubPO4 );
 
        $this->assertSame( [ 'a' => 'q', 'c' => '<d>&amp;', 'e' => 'g', 'x' ],
            $op->getHeadItemsArray() );
 
        $this->assertTrue( $op->hasHeadItem( 'a' ) );
        $this->assertTrue( $op->hasHeadItem( 'c' ) );
        $this->assertTrue( $op->hasHeadItem( 'e' ) );
        $this->assertTrue( $op->hasHeadItem( '0' ) );
        $this->assertFalse( $op->hasHeadItem( 'b' ) );
 
        $this->assertContains( "\nq\n<d>&amp;\ng\nx\n",
            '' . $op->headElement( $op->getContext()->getSkin() ) );
    }
 
    public function testAddBodyClasses() {
        $op = $this->newInstance();
        $op->addBodyClasses( 'a' );
        $op->addBodyClasses( 'mediawiki' );
        $op->addBodyClasses( 'b c' );
        $op->addBodyClasses( [ 'd', 'e' ] );
        $op->addBodyClasses( 'a' );
 
        $this->assertContains( '"a mediawiki b c d e ltr',
            '' . $op->headElement( $op->getContext()->getSkin() ) );
    }
 
    public function testArticleBodyOnly() {
        $op = $this->newInstance();
        $this->assertFalse( $op->getArticleBodyOnly() );
 
        $op->setArticleBodyOnly( true );
        $this->assertTrue( $op->getArticleBodyOnly() );
 
        $op->addHTML( '<b>a</b>' );
 
        $this->assertSame( '<b>a</b>', $op->output( true ) );
    }
 
    public function testProperties() {
        $op = $this->newInstance();
 
        $this->assertNull( $op->getProperty( 'foo' ) );
 
        $op->setProperty( 'foo', 'bar' );
        $op->setProperty( 'baz', 'quz' );
 
        $this->assertSame( 'bar', $op->getProperty( 'foo' ) );
        $this->assertSame( 'quz', $op->getProperty( 'baz' ) );
    }
 
    public function testCheckLastModified(
        $timestamp, $ifModifiedSince, $expected, $config = [], $callback = null
    ) {
        $request = new FauxRequest();
        if ( $ifModifiedSince ) {
            if ( is_numeric( $ifModifiedSince ) ) {
                // Unix timestamp
                $ifModifiedSince = date( 'D, d M Y H:i:s', $ifModifiedSince ) . ' GMT';
            }
            $request->setHeader( 'If-Modified-Since', $ifModifiedSince );
        }
 
        if ( !isset( $config['CacheEpoch'] ) ) {
            // Make sure it's not too recent
            $config['CacheEpoch'] = '20000101000000';
        }
 
        $op = $this->newInstance( $config, $request );
 
        if ( $callback ) {
            $callback( $op, $this );
        }
 
        // Avoid a complaint about not being able to disable compression
        Wikimedia\suppressWarnings();
        try {
            $this->assertEquals( $expected, $op->checkLastModified( $timestamp ) );
        } finally {
            Wikimedia\restoreWarnings();
        }
    }
 
    public function provideCheckLastModified() {
        $lastModified = time() - 3600;
        return [
            'Timestamp 0' =>
                [ '0', $lastModified, false ],
            'Timestamp Unix epoch' =>
                [ '19700101000000', $lastModified, false ],
            'Timestamp same as If-Modified-Since' =>
                [ $lastModified, $lastModified, true ],
            'Timestamp one second after If-Modified-Since' =>
                [ $lastModified + 1, $lastModified, false ],
            'No If-Modified-Since' =>
                [ $lastModified + 1, null, false ],
            'Malformed If-Modified-Since' =>
                [ $lastModified + 1, 'GIBBERING WOMBATS !!!', false ],
            'Non-standard IE-style If-Modified-Since' =>
                [ $lastModified, date( 'D, d M Y H:i:s', $lastModified ) . ' GMT; length=5202',
                    true ],
            // @todo Should we fix this behavior to match the spec?  Probably no reason to.
            'If-Modified-Since not per spec but we accept it anyway because strtotime does' =>
                [ $lastModified, "@$lastModified", true ],
            '$wgCachePages = false' =>
                [ $lastModified, $lastModified, false, [ 'CachePages' => false ] ],
            '$wgCacheEpoch' =>
                [ $lastModified, $lastModified, false,
                    [ 'CacheEpoch' => wfTimestamp( TS_MW, $lastModified + 1 ) ] ],
            'Recently-touched user' =>
                [ $lastModified, $lastModified, false, [],
                function ( $op ) {
                    $op->getContext()->setUser( $this->getTestUser()->getUser() );
                } ],
            'After Squid expiry' =>
                [ $lastModified, $lastModified, false,
                    [ 'UseSquid' => true, 'SquidMaxage' => 3599 ] ],
            'Hook allows cache use' =>
                [ $lastModified + 1, $lastModified, true, [],
                function ( $op, $that ) {
                    $that->setTemporaryHook( 'OutputPageCheckLastModified',
                        function ( &$modifiedTimes ) {
                            $modifiedTimes = [ 1 ];
                        }
                    );
                } ],
            'Hooks prohibits cache use' =>
                [ $lastModified, $lastModified, false, [],
                function ( $op, $that ) {
                    $that->setTemporaryHook( 'OutputPageCheckLastModified',
                        function ( &$modifiedTimes ) {
                            $modifiedTimes = [ max( $modifiedTimes ) + 1 ];
                        }
                    );
                } ],
        ];
    }
 
    public function testCdnCacheEpoch( $params ) {
        $out = TestingAccessWrapper::newFromObject( $this->newInstance() );
        $reqTime = strtotime( $params['reqTime'] );
        $pageTime = strtotime( $params['pageTime'] );
        $actual = max( $pageTime, $out->getCdnCacheEpoch( $reqTime, $params['maxAge'] ) );
 
        $this->assertEquals(
            $params['expect'],
            gmdate( DateTime::ATOM, $actual ),
            'cdn epoch'
        );
    }
 
    public static function provideCdnCacheEpoch() {
        $base = [
            'pageTime' => '2011-04-01T12:00:00+00:00',
            'maxAge' => 24 * 3600,
        ];
        return [
            'after 1s' => [ $base + [
                'reqTime' => '2011-04-01T12:00:01+00:00',
                'expect' => '2011-04-01T12:00:00+00:00',
            ] ],
            'after 23h' => [ $base + [
                'reqTime' => '2011-04-02T11:00:00+00:00',
                'expect' => '2011-04-01T12:00:00+00:00',
            ] ],
            'after 24h and a bit' => [ $base + [
                'reqTime' => '2011-04-02T12:34:56+00:00',
                'expect' => '2011-04-01T12:34:56+00:00',
            ] ],
            'after a year' => [ $base + [
                'reqTime' => '2012-05-06T00:12:07+00:00',
                'expect' => '2012-05-05T00:12:07+00:00',
            ] ],
        ];
    }
 
    // @todo How to test setLastModified?
 
    public function testSetRobotPolicy() {
        $op = $this->newInstance();
        $op->setRobotPolicy( 'noindex, nofollow' );
 
        $links = $op->getHeadLinksArray();
        $this->assertContains( '<meta name="robots" content="noindex,nofollow"/>', $links );
    }
 
    public function testSetIndexFollowPolicies() {
        $op = $this->newInstance();
        $op->setIndexPolicy( 'noindex' );
        $op->setFollowPolicy( 'nofollow' );
 
        $links = $op->getHeadLinksArray();
        $this->assertContains( '<meta name="robots" content="noindex,nofollow"/>', $links );
    }
 
    private function extractHTMLTitle( OutputPage $op ) {
        $html = $op->headElement( $op->getContext()->getSkin() );
 
        // OutputPage should always output the title in a nice format such that regexes will work
        // fine.  If it doesn't, we'll fail the tests.
        preg_match_all( '!<title>(.*?)</title>!', $html, $matches );
 
        $this->assertLessThanOrEqual( 1, count( $matches[1] ), 'More than one <title>!' );
 
        if ( !count( $matches[1] ) ) {
            return null;
        }
 
        return $matches[1][0];
    }
 
    private static function getMsgText( $op, ...$msgParams ) {
        return $op->msg( ...$msgParams )->inContentLanguage()->text();
    }
 
    public function testHTMLTitle() {
        $op = $this->newInstance();
 
        // Default
        $this->assertSame( '', $op->getHTMLTitle() );
        $this->assertSame( '', $op->getPageTitle() );
        $this->assertSame(
            $this->getMsgText( $op, 'pagetitle', '' ),
            $this->extractHTMLTitle( $op )
        );
 
        // Set to string
        $op->setHTMLTitle( 'Potatoes will eat me' );
 
        $this->assertSame( 'Potatoes will eat me', $op->getHTMLTitle() );
        $this->assertSame( 'Potatoes will eat me', $this->extractHTMLTitle( $op ) );
        // Shouldn't have changed the page title
        $this->assertSame( '', $op->getPageTitle() );
 
        // Set to message
        $msg = $op->msg( 'mainpage' );
 
        $op->setHTMLTitle( $msg );
        $this->assertSame( $msg->text(), $op->getHTMLTitle() );
        $this->assertSame( $msg->text(), $this->extractHTMLTitle( $op ) );
        $this->assertSame( '', $op->getPageTitle() );
    }
 
    public function testSetRedirectedFrom() {
        $op = $this->newInstance();
 
        $op->setRedirectedFrom( Title::newFromText( 'Talk:Some page' ) );
        $this->assertSame( 'Talk:Some_page', $op->getJSVars()['wgRedirectedFrom'] );
    }
 
    public function testPageTitle() {
        // We don't test the actual HTML output anywhere, because that's up to the skin.
        $op = $this->newInstance();
 
        // Test default
        $this->assertSame( '', $op->getPageTitle() );
        $this->assertSame( '', $op->getHTMLTitle() );
 
        // Test set to plain text
        $op->setPageTitle( 'foobar' );
 
        $this->assertSame( 'foobar', $op->getPageTitle() );
        // HTML title should change as well
        $this->assertSame( $this->getMsgText( $op, 'pagetitle', 'foobar' ), $op->getHTMLTitle() );
 
        // Test set to text with good and bad HTML.  We don't try to be comprehensive here, that
        // belongs in Sanitizer tests.
        $op->setPageTitle( '<script>a</script>&amp;<i>b</i>' );
 
        $this->assertSame( '&lt;script&gt;a&lt;/script&gt;&amp;<i>b</i>', $op->getPageTitle() );
        $this->assertSame(
            $this->getMsgText( $op, 'pagetitle', '<script>a</script>&b' ),
            $op->getHTMLTitle()
        );
 
        // Test set to message
        $text = $this->getMsgText( $op, 'mainpage' );
 
        $op->setPageTitle( $op->msg( 'mainpage' )->inContentLanguage() );
        $this->assertSame( $text, $op->getPageTitle() );
        $this->assertSame( $this->getMsgText( $op, 'pagetitle', $text ), $op->getHTMLTitle() );
    }
 
    public function testSetTitle() {
        $op = $this->newInstance();
 
        $this->assertSame( 'My test page', $op->getTitle()->getPrefixedText() );
 
        $op->setTitle( Title::newFromText( 'Another test page' ) );
 
        $this->assertSame( 'Another test page', $op->getTitle()->getPrefixedText() );
    }
 
    public function testSubtitle() {
        $op = $this->newInstance();
 
        $this->assertSame( '', $op->getSubtitle() );
 
        $op->addSubtitle( '<b>foo</b>' );
 
        $this->assertSame( '<b>foo</b>', $op->getSubtitle() );
 
        $op->addSubtitle( $op->msg( 'mainpage' )->inContentLanguage() );
 
        $this->assertSame(
            "<b>foo</b><br />\n\t\t\t\t" . $this->getMsgText( $op, 'mainpage' ),
            $op->getSubtitle()
        );
 
        $op->setSubtitle( 'There can be only one' );
 
        $this->assertSame( 'There can be only one', $op->getSubtitle() );
 
        $op->clearSubtitle();
 
        $this->assertSame( '', $op->getSubtitle() );
    }
 
    public function testBuildBacklinkSubtitle( $titles, $queries, $contains, $notContains ) {
        if ( count( $titles ) > 1 ) {
            // Not applicable
            $this->assertTrue( true );
            return;
        }
 
        $title = Title::newFromText( $titles[0] );
        $query = $queries[0];
 
        $this->editPage( 'Page 1', '' );
        $this->editPage( 'Page 2', '#REDIRECT [[Page 1]]' );
 
        $str = OutputPage::buildBacklinkSubtitle( $title, $query )->text();
 
        foreach ( $contains as $substr ) {
            $this->assertContains( $substr, $str );
        }
 
        foreach ( $notContains as $substr ) {
            $this->assertNotContains( $substr, $str );
        }
    }
 
    public function testAddBacklinkSubtitle( $titles, $queries, $contains, $notContains ) {
        $this->editPage( 'Page 1', '' );
        $this->editPage( 'Page 2', '#REDIRECT [[Page 1]]' );
 
        $op = $this->newInstance();
        foreach ( $titles as $i => $unused ) {
            $op->addBacklinkSubtitle( Title::newFromText( $titles[$i] ), $queries[$i] );
        }
 
        $str = $op->getSubtitle();
 
        foreach ( $contains as $substr ) {
            $this->assertContains( $substr, $str );
        }
 
        foreach ( $notContains as $substr ) {
            $this->assertNotContains( $substr, $str );
        }
    }
 
    public function provideBacklinkSubtitle() {
        return [
            [
                [ 'Page 1' ],
                [ [] ],
                [ 'Page 1' ],
                [ 'redirect', 'Page 2' ],
            ],
            [
                [ 'Page 2' ],
                [ [] ],
                [ 'redirect=no' ],
                [ 'Page 1' ],
            ],
            [
                [ 'Page 1' ],
                [ [ 'action' => 'edit' ] ],
                [ 'action=edit' ],
                [],
            ],
            [
                [ 'Page 1', 'Page 2' ],
                [ [], [] ],
                [ 'Page 1', 'Page 2', "<br />\n\t\t\t\t" ],
                [],
            ],
            // @todo Anything else to test?
        ];
    }
 
    public function testPrintable() {
        $op = $this->newInstance();
 
        $this->assertFalse( $op->isPrintable() );
 
        $op->setPrintable();
 
        $this->assertTrue( $op->isPrintable() );
    }
 
    public function testDisable() {
        $op = $this->newInstance();
 
        $this->assertFalse( $op->isDisabled() );
        $this->assertNotSame( '', $op->output( true ) );
 
        $op->disable();
 
        $this->assertTrue( $op->isDisabled() );
        $this->assertSame( '', $op->output( true ) );
    }
 
    public function testShowNewSectionLink() {
        $op = $this->newInstance();
 
        $this->assertFalse( $op->showNewSectionLink() );
 
        $pOut1 = $this->createParserOutputStub( 'getNewSection', true );
        $op->addParserOutputMetadata( $pOut1 );
        $this->assertTrue( $op->showNewSectionLink() );
 
        $pOut2 = $this->createParserOutputStub( 'getNewSection', false );
        $op->addParserOutput( $pOut2 );
        $this->assertFalse( $op->showNewSectionLink() );
    }
 
    public function testForceHideNewSectionLink() {
        $op = $this->newInstance();
 
        $this->assertFalse( $op->forceHideNewSectionLink() );
 
        $pOut1 = $this->createParserOutputStub( 'getHideNewSection', true );
        $op->addParserOutputMetadata( $pOut1 );
        $this->assertTrue( $op->forceHideNewSectionLink() );
 
        $pOut2 = $this->createParserOutputStub( 'getHideNewSection', false );
        $op->addParserOutput( $pOut2 );
        $this->assertFalse( $op->forceHideNewSectionLink() );
    }
 
    public function testSetSyndicated() {
        $op = $this->newInstance();
        $this->assertFalse( $op->isSyndicated() );
 
        $op->setSyndicated();
        $this->assertTrue( $op->isSyndicated() );
 
        $op->setSyndicated( false );
        $this->assertFalse( $op->isSyndicated() );
    }
 
    public function testFeedLinks() {
        $op = $this->newInstance();
        $this->assertSame( [], $op->getSyndicationLinks() );
 
        $op->addFeedLink( 'not a supported format', 'abc' );
        $this->assertFalse( $op->isSyndicated() );
        $this->assertSame( [], $op->getSyndicationLinks() );
 
        $feedTypes = $op->getConfig()->get( 'AdvertisedFeedTypes' );
 
        $op->addFeedLink( $feedTypes[0], 'def' );
        $this->assertTrue( $op->isSyndicated() );
        $this->assertSame( [ $feedTypes[0] => 'def' ], $op->getSyndicationLinks() );
 
        $op->setFeedAppendQuery( false );
        $expected = [];
        foreach ( $feedTypes as $type ) {
            $expected[$type] = $op->getTitle()->getLocalURL( "feed=$type" );
        }
        $this->assertSame( $expected, $op->getSyndicationLinks() );
 
        $op->setFeedAppendQuery( 'apples=oranges' );
        foreach ( $feedTypes as $type ) {
            $expected[$type] = $op->getTitle()->getLocalURL( "feed=$type&apples=oranges" );
        }
        $this->assertSame( $expected, $op->getSyndicationLinks() );
    }
 
    function testArticleFlags() {
        $op = $this->newInstance();
        $this->assertFalse( $op->isArticle() );
        $this->assertTrue( $op->isArticleRelated() );
 
        $op->setArticleRelated( false );
        $this->assertFalse( $op->isArticle() );
        $this->assertFalse( $op->isArticleRelated() );
 
        $op->setArticleFlag( true );
        $this->assertTrue( $op->isArticle() );
        $this->assertTrue( $op->isArticleRelated() );
 
        $op->setArticleFlag( false );
        $this->assertFalse( $op->isArticle() );
        $this->assertTrue( $op->isArticleRelated() );
 
        $op->setArticleFlag( true );
        $op->setArticleRelated( false );
        $this->assertFalse( $op->isArticle() );
        $this->assertFalse( $op->isArticleRelated() );
    }
 
    function testLanguageLinks() {
        $op = $this->newInstance();
        $this->assertSame( [], $op->getLanguageLinks() );
 
        $op->addLanguageLinks( [ 'fr:A', 'it:B' ] );
        $this->assertSame( [ 'fr:A', 'it:B' ], $op->getLanguageLinks() );
 
        $op->addLanguageLinks( [ 'de:C', 'es:D' ] );
        $this->assertSame( [ 'fr:A', 'it:B', 'de:C', 'es:D' ], $op->getLanguageLinks() );
 
        $op->setLanguageLinks( [ 'pt:E' ] );
        $this->assertSame( [ 'pt:E' ], $op->getLanguageLinks() );
 
        $pOut1 = $this->createParserOutputStub( 'getLanguageLinks', [ 'he:F', 'ar:G' ] );
        $op->addParserOutputMetadata( $pOut1 );
        $this->assertSame( [ 'pt:E', 'he:F', 'ar:G' ], $op->getLanguageLinks() );
 
        $pOut2 = $this->createParserOutputStub( 'getLanguageLinks', [ 'pt:H' ] );
        $op->addParserOutput( $pOut2 );
        $this->assertSame( [ 'pt:E', 'he:F', 'ar:G', 'pt:H' ], $op->getLanguageLinks() );
    }
 
    // @todo Are these category links tests too abstract and complicated for what they test?  Would
    // it make sense to just write out all the tests by hand with maybe some copy-and-paste?
 
    public function testAddCategoryLinks(
        array $args, array $fakeResults, callable $variantLinkCallback = null,
        array $expectedNormal, array $expectedHidden
    ) {
        $expectedNormal = $this->extractExpectedCategories( $expectedNormal, 'add' );
        $expectedHidden = $this->extractExpectedCategories( $expectedHidden, 'add' );
 
        $op = $this->setupCategoryTests( $fakeResults, $variantLinkCallback );
 
        $op->addCategoryLinks( $args );
 
        $this->doCategoryAsserts( $op, $expectedNormal, $expectedHidden );
        $this->doCategoryLinkAsserts( $op, $expectedNormal, $expectedHidden );
    }
 
    public function testAddCategoryLinksOneByOne(
        array $args, array $fakeResults, callable $variantLinkCallback = null,
        array $expectedNormal, array $expectedHidden
    ) {
        if ( count( $args ) <= 1 ) {
            // @todo Should this be skipped instead of passed?
            $this->assertTrue( true );
            return;
        }
 
        $expectedNormal = $this->extractExpectedCategories( $expectedNormal, 'onebyone' );
        $expectedHidden = $this->extractExpectedCategories( $expectedHidden, 'onebyone' );
 
        $op = $this->setupCategoryTests( $fakeResults, $variantLinkCallback );
 
        foreach ( $args as $key => $val ) {
            $op->addCategoryLinks( [ $key => $val ] );
        }
 
        $this->doCategoryAsserts( $op, $expectedNormal, $expectedHidden );
        $this->doCategoryLinkAsserts( $op, $expectedNormal, $expectedHidden );
    }
 
    public function testSetCategoryLinks(
        array $args, array $fakeResults, callable $variantLinkCallback = null,
        array $expectedNormal, array $expectedHidden
    ) {
        $expectedNormal = $this->extractExpectedCategories( $expectedNormal, 'set' );
        $expectedHidden = $this->extractExpectedCategories( $expectedHidden, 'set' );
 
        $op = $this->setupCategoryTests( $fakeResults, $variantLinkCallback );
 
        $op->setCategoryLinks( [ 'Initial page' => 'Initial page' ] );
        $op->setCategoryLinks( $args );
 
        // We don't reset the categories, for some reason, only the links
        $expectedNormalCats = array_merge( [ 'Initial page' ], $expectedNormal );
        $expectedCats = array_merge( $expectedHidden, $expectedNormalCats );
 
        $this->doCategoryAsserts( $op, $expectedNormalCats, $expectedHidden );
        $this->doCategoryLinkAsserts( $op, $expectedNormal, $expectedHidden );
    }
 
    public function testParserOutputCategoryLinks(
        array $args, array $fakeResults, callable $variantLinkCallback = null,
        array $expectedNormal, array $expectedHidden
    ) {
        $expectedNormal = $this->extractExpectedCategories( $expectedNormal, 'pout' );
        $expectedHidden = $this->extractExpectedCategories( $expectedHidden, 'pout' );
 
        $op = $this->setupCategoryTests( $fakeResults, $variantLinkCallback );
 
        $stubPO = $this->createParserOutputStub( 'getCategories', $args );
 
        // addParserOutput and addParserOutputMetadata should behave identically for us, so
        // alternate to get coverage for both without adding extra tests
        static $idx = 0;
        $idx++;
        $method = [ 'addParserOutputMetadata', 'addParserOutput' ][$idx % 2];
        $op->$method( $stubPO );
 
        $this->doCategoryAsserts( $op, $expectedNormal, $expectedHidden );
        $this->doCategoryLinkAsserts( $op, $expectedNormal, $expectedHidden );
    }
 
    private function extractExpectedCategories( array $expected, $key ) {
        if ( !$expected || isset( $expected[0] ) ) {
            return $expected;
        }
        return $expected[$key] ?? $expected['default'];
    }
 
    private function setupCategoryTests(
        array $fakeResults, callable $variantLinkCallback = null
    ) : OutputPage {
        $this->setMwGlobals( 'wgUsePigLatinVariant', true );
 
        $op = $this->getMockBuilder( OutputPage::class )
            ->setConstructorArgs( [ new RequestContext() ] )
                   ->setMethods( [ 'addCategoryLinksToLBAndGetResult', 'getTitle' ] )
            ->getMock();
 
        $title = Title::newFromText( 'My test page' );
        $op->expects( $this->any() )
            ->method( 'getTitle' )
            ->will( $this->returnValue( $title ) );
 
        $op->expects( $this->any() )
            ->method( 'addCategoryLinksToLBAndGetResult' )
            ->will( $this->returnCallback( function ( array $categories ) use ( $fakeResults ) {
                $return = [];
                foreach ( $categories as $category => $unused ) {
                    if ( isset( $fakeResults[$category] ) ) {
                        $return[] = $fakeResults[$category];
                    }
                }
                return new FakeResultWrapper( $return );
            } ) );
 
        if ( $variantLinkCallback ) {
            $mockContLang = $this->getMockBuilder( Language::class )
                ->setConstructorArgs( [ 'en' ] )
                ->setMethods( [ 'findVariantLink' ] )
                ->getMock();
            $mockContLang->expects( $this->any() )
                ->method( 'findVariantLink' )
                ->will( $this->returnCallback( $variantLinkCallback ) );
            $this->setContentLang( $mockContLang );
        }
 
        $this->assertSame( [], $op->getCategories() );
 
        return $op;
    }
 
    private function doCategoryAsserts( $op, $expectedNormal, $expectedHidden ) {
        $this->assertSame( array_merge( $expectedHidden, $expectedNormal ), $op->getCategories() );
        $this->assertSame( $expectedNormal, $op->getCategories( 'normal' ) );
        $this->assertSame( $expectedHidden, $op->getCategories( 'hidden' ) );
    }
 
    private function doCategoryLinkAsserts( $op, $expectedNormal, $expectedHidden ) {
        $catLinks = $op->getCategoryLinks();
        $this->assertSame( (bool)$expectedNormal + (bool)$expectedHidden, count( $catLinks ) );
        if ( $expectedNormal ) {
            $this->assertSame( count( $expectedNormal ), count( $catLinks['normal'] ) );
        }
        if ( $expectedHidden ) {
            $this->assertSame( count( $expectedHidden ), count( $catLinks['hidden'] ) );
        }
 
        foreach ( $expectedNormal as $i => $name ) {
            $this->assertContains( $name, $catLinks['normal'][$i] );
        }
        foreach ( $expectedHidden as $i => $name ) {
            $this->assertContains( $name, $catLinks['hidden'][$i] );
        }
    }
 
    public function provideGetCategories() {
        return [
            'No categories' => [ [], [], null, [], [] ],
            'Simple test' => [
                [ 'Test1' => 'Some sortkey', 'Test2' => 'A different sortkey' ],
                [ 'Test1' => (object)[ 'pp_value' => 1, 'page_title' => 'Test1' ],
                    'Test2' => (object)[ 'page_title' => 'Test2' ] ],
                null,
                [ 'Test2' ],
                [ 'Test1' ],
            ],
            'Invalid title' => [
                [ '[' => '[', 'Test' => 'Test' ],
                [ 'Test' => (object)[ 'page_title' => 'Test' ] ],
                null,
                [ 'Test' ],
                [],
            ],
            'Variant link' => [
                [ 'Test' => 'Test', 'Estay' => 'Estay' ],
                [ 'Test' => (object)[ 'page_title' => 'Test' ] ],
                function ( &$link, &$title ) {
                    if ( $link === 'Estay' ) {
                        $link = 'Test';
                        $title = Title::makeTitleSafe( NS_CATEGORY, $link );
                    }
                },
                // For adding one by one, the variant gets added as well as the original category,
                // but if you add them all together the second time gets skipped.
                [ 'onebyone' => [ 'Test', 'Test' ], 'default' => [ 'Test' ] ],
                [],
            ],
        ];
    }
 
    public function testGetCategoriesInvalid() {
        $this->setExpectedException( InvalidArgumentException::class,
            'Invalid category type given: hiddne' );
 
        $op = $this->newInstance();
        $op->getCategories( 'hiddne' );
    }
 
    // @todo Should we test addCategoryLinksToLBAndGetResult?  If so, how?  Insert some test rows in
    // the DB?
 
    public function testIndicators() {
        $op = $this->newInstance();
        $this->assertSame( [], $op->getIndicators() );
 
        $op->setIndicators( [] );
        $this->assertSame( [], $op->getIndicators() );
 
        // Test sorting alphabetically
        $op->setIndicators( [ 'b' => 'x', 'a' => 'y' ] );
        $this->assertSame( [ 'a' => 'y', 'b' => 'x' ], $op->getIndicators() );
 
        // Test overwriting existing keys
        $op->setIndicators( [ 'c' => 'z', 'a' => 'w' ] );
        $this->assertSame( [ 'a' => 'w', 'b' => 'x', 'c' => 'z' ], $op->getIndicators() );
 
        // Test with addParserOutputMetadata
        $pOut1 = $this->createParserOutputStub( 'getIndicators', [ 'c' => 'u', 'd' => 'v' ] );
        $op->addParserOutputMetadata( $pOut1 );
        $this->assertSame( [ 'a' => 'w', 'b' => 'x', 'c' => 'u', 'd' => 'v' ],
            $op->getIndicators() );
 
        // Test with addParserOutput
        $pOut2 = $this->createParserOutputStub( 'getIndicators', [ 'a' => '!!!' ] );
        $op->addParserOutput( $pOut2 );
        $this->assertSame( [ 'a' => '!!!', 'b' => 'x', 'c' => 'u', 'd' => 'v' ],
            $op->getIndicators() );
    }
 
    public function testAddHelpLink() {
        $op = $this->newInstance();
 
        $op->addHelpLink( 'Manual:PHP unit testing' );
        $indicators = $op->getIndicators();
        $this->assertSame( [ 'mw-helplink' ], array_keys( $indicators ) );
        $this->assertContains( 'Manual:PHP_unit_testing', $indicators['mw-helplink'] );
 
        $op->addHelpLink( 'https://phpunit.de', true );
        $indicators = $op->getIndicators();
        $this->assertSame( [ 'mw-helplink' ], array_keys( $indicators ) );
        $this->assertContains( 'https://phpunit.de', $indicators['mw-helplink'] );
        $this->assertNotContains( 'mediawiki', $indicators['mw-helplink'] );
        $this->assertNotContains( 'Manual:PHP', $indicators['mw-helplink'] );
    }
 
    public function testBodyHTML() {
        $op = $this->newInstance();
        $this->assertSame( '', $op->getHTML() );
 
        $op->addHTML( 'a' );
        $this->assertSame( 'a', $op->getHTML() );
 
        $op->addHTML( 'b' );
        $this->assertSame( 'ab', $op->getHTML() );
 
        $op->prependHTML( 'c' );
        $this->assertSame( 'cab', $op->getHTML() );
 
        $op->addElement( 'p', [ 'id' => 'foo' ], 'd' );
        $this->assertSame( 'cab<p id="foo">d</p>', $op->getHTML() );
 
        $op->clearHTML();
        $this->assertSame( '', $op->getHTML() );
    }
 
    public function testRevisionId( $newVal, $expected ) {
        $op = $this->newInstance();
 
        $this->assertNull( $op->setRevisionId( $newVal ) );
        $this->assertSame( $expected, $op->getRevisionId() );
        $this->assertSame( $expected, $op->setRevisionId( null ) );
        $this->assertNull( $op->getRevisionId() );
    }
 
    public function provideRevisionId() {
        return [
            [ null, null ],
            [ 7, 7 ],
            [ -1, -1 ],
            [ 3.2, 3 ],
            [ '0', 0 ],
            [ '32% finished', 32 ],
            [ false, 0 ],
        ];
    }
 
    public function testRevisionTimestamp() {
        $op = $this->newInstance();
        $this->assertNull( $op->getRevisionTimestamp() );
 
        $this->assertNull( $op->setRevisionTimestamp( 'abc' ) );
        $this->assertSame( 'abc', $op->getRevisionTimestamp() );
        $this->assertSame( 'abc', $op->setRevisionTimestamp( null ) );
        $this->assertNull( $op->getRevisionTimestamp() );
    }
 
    public function testFileVersion() {
        $op = $this->newInstance();
        $this->assertNull( $op->getFileVersion() );
 
        $stubFile = $this->createMock( File::class );
        $stubFile->method( 'exists' )->willReturn( true );
        $stubFile->method( 'getTimestamp' )->willReturn( '12211221123321' );
        $stubFile->method( 'getSha1' )->willReturn( 'bf3ffa7047dc080f5855377a4f83cd18887e3b05' );
 
        $op->setFileVersion( $stubFile );
 
        $this->assertEquals(
            [ 'time' => '12211221123321', 'sha1' => 'bf3ffa7047dc080f5855377a4f83cd18887e3b05' ],
            $op->getFileVersion()
        );
 
        $stubMissingFile = $this->createMock( File::class );
        $stubMissingFile->method( 'exists' )->willReturn( false );
 
        $op->setFileVersion( $stubMissingFile );
        $this->assertNull( $op->getFileVersion() );
 
        $op->setFileVersion( $stubFile );
        $this->assertNotNull( $op->getFileVersion() );
 
        $op->setFileVersion( null );
        $this->assertNull( $op->getFileVersion() );
    }
 
    private function createParserOutputStub( ...$args ) {
        if ( count( $args ) === 0 ) {
            $retVals = [];
        } elseif ( count( $args ) === 1 ) {
            $retVals = $args[0];
        } elseif ( count( $args ) === 2 ) {
            $retVals = [ $args[0] => $args[1] ];
        }
        $pOut = $this->getMock( ParserOutput::class );
        foreach ( $retVals as $method => $retVal ) {
            $pOut->method( $method )->willReturn( $retVal );
        }
 
        $arrayReturningMethods = [
            'getCategories',
            'getFileSearchOptions',
            'getHeadItems',
            'getIndicators',
            'getLanguageLinks',
            'getOutputHooks',
            'getTemplateIds',
        ];
 
        foreach ( $arrayReturningMethods as $method ) {
            $pOut->method( $method )->willReturn( [] );
        }
 
        return $pOut;
    }
 
    public function testTemplateIds() {
        $op = $this->newInstance();
        $this->assertSame( [], $op->getTemplateIds() );
 
        // Test with no template id's
        $stubPOEmpty = $this->createParserOutputStub();
        $op->addParserOutputMetadata( $stubPOEmpty );
        $this->assertSame( [], $op->getTemplateIds() );
 
        // Test with some arbitrary template id's
        $ids = [
            NS_MAIN => [ 'A' => 3, 'B' => 17 ],
            NS_TALK => [ 'C' => 31 ],
            NS_MEDIA => [ 'D' => -1 ],
        ];
 
        $stubPO1 = $this->createParserOutputStub( 'getTemplateIds', $ids );
 
        $op->addParserOutputMetadata( $stubPO1 );
        $this->assertSame( $ids, $op->getTemplateIds() );
 
        // Test merging with a second set of id's
        $stubPO2 = $this->createParserOutputStub( 'getTemplateIds', [
            NS_MAIN => [ 'E' => 1234 ],
            NS_PROJECT => [ 'F' => 5678 ],
        ] );
 
        $finalIds = [
            NS_MAIN => [ 'E' => 1234, 'A' => 3, 'B' => 17 ],
            NS_TALK => [ 'C' => 31 ],
            NS_MEDIA => [ 'D' => -1 ],
            NS_PROJECT => [ 'F' => 5678 ],
        ];
 
        $op->addParserOutput( $stubPO2 );
        $this->assertSame( $finalIds, $op->getTemplateIds() );
 
        // Test merging with an empty set of id's
        $op->addParserOutputMetadata( $stubPOEmpty );
        $this->assertSame( $finalIds, $op->getTemplateIds() );
    }
 
    public function testFileSearchOptions() {
        $op = $this->newInstance();
        $this->assertSame( [], $op->getFileSearchOptions() );
 
        // Test with no files
        $stubPOEmpty = $this->createParserOutputStub();
 
        $op->addParserOutputMetadata( $stubPOEmpty );
        $this->assertSame( [], $op->getFileSearchOptions() );
 
        // Test with some arbitrary files
        $files1 = [
            'A' => [ 'time' => null, 'sha1' => '' ],
            'B' => [
                'time' => '12211221123321',
                'sha1' => 'bf3ffa7047dc080f5855377a4f83cd18887e3b05',
            ],
        ];
 
        $stubPO1 = $this->createParserOutputStub( 'getFileSearchOptions', $files1 );
 
        $op->addParserOutput( $stubPO1 );
        $this->assertSame( $files1, $op->getFileSearchOptions() );
 
        // Test merging with a second set of files
        $files2 = [
            'C' => [ 'time' => null, 'sha1' => '' ],
            'B' => [ 'time' => null, 'sha1' => '' ],
        ];
 
        $stubPO2 = $this->createParserOutputStub( 'getFileSearchOptions', $files2 );
 
        $op->addParserOutputMetadata( $stubPO2 );
        $this->assertSame( array_merge( $files1, $files2 ), $op->getFileSearchOptions() );
 
        // Test merging with an empty set of files
        $op->addParserOutput( $stubPOEmpty );
        $this->assertSame( array_merge( $files1, $files2 ), $op->getFileSearchOptions() );
    }
 
    public function testAddWikiText( $method, array $args, $expected ) {
        $op = $this->newInstance();
        $this->assertSame( '', $op->getHTML() );
 
        $this->hideDeprecated( 'OutputPage::addWikiTextTitle' );
        $this->hideDeprecated( 'OutputPage::addWikiTextWithTitle' );
        $this->hideDeprecated( 'OutputPage::addWikiTextTidy' );
        $this->hideDeprecated( 'OutputPage::addWikiTextTitleTidy' );
        if ( in_array(
            $method,
            [ 'addWikiTextWithTitle', 'addWikiTextTitleTidy', 'addWikiTextTitle' ]
        ) && count( $args ) >= 2 && $args[1] === null ) {
            // Special placeholder because we can't get the actual title in the provider
            $args[1] = $op->getTitle();
        }
        if ( in_array(
            $method,
            [ 'addWikiTextAsInterface', 'addWikiTextAsContent' ]
        ) && count( $args ) >= 3 && $args[2] === null ) {
            // Special placeholder because we can't get the actual title in the provider
            $args[2] = $op->getTitle();
        }
 
        $op->$method( ...$args );
        $this->assertSame( $expected, $op->getHTML() );
    }
 
    public function provideAddWikiText() {
        $tests = [
            'addWikiText' => [
                // Not tidied; this API is deprecated.
                'Simple wikitext' => [
                    [ "'''Bold'''" ],
                    "<p><b>Bold</b>\n</p>",
                ], 'List at start' => [
                    [ '* List' ],
                    "<ul><li>List</li></ul>\n",
                ], 'List not at start' => [
                    [ '* Not a list', false ],
                    '* Not a list',
                ], 'Non-interface' => [
                    [ "'''Bold'''", true, false ],
                    "<p><b>Bold</b>\n</p>",
                ], 'No section edit links' => [
                    [ '== Title ==' ],
                    "<h2><span class=\"mw-headline\" id=\"Title\">Title</span></h2>\n",
                ],
            ],
            'addWikiTextWithTitle' => [
                // Untidied; this API is deprecated
                'With title at start' => [
                    [ '* {{PAGENAME}}', Title::newFromText( 'Talk:Some page' ) ],
                    "<ul><li>Some page</li></ul>\n",
                ], 'With title at start' => [
                    [ '* {{PAGENAME}}', Title::newFromText( 'Talk:Some page' ), false ],
                    "* Some page",
                ],
            ],
            'addWikiTextAsInterface' => [
                // Preferred interface: output is tidied
                'Simple wikitext' => [
                    [ "'''Bold'''" ],
                    "<p><b>Bold</b>\n</p>",
                ], 'Untidy wikitext' => [
                    [ "<b>Bold" ],
                    "<p><b>Bold\n</b></p>",
                ], 'List at start' => [
                    [ '* List' ],
                    "<ul><li>List</li></ul>\n",
                ], 'List not at start' => [
                    [ '* Not a list', false ],
                    '<p>* Not a list</p>',
                ], 'No section edit links' => [
                    [ '== Title ==' ],
                    "<h2><span class=\"mw-headline\" id=\"Title\">Title</span></h2>\n",
                ], 'With title at start' => [
                    [ '* {{PAGENAME}}', true, Title::newFromText( 'Talk:Some page' ) ],
                    "<ul><li>Some page</li></ul>\n",
                ], 'With title at start' => [
                    [ '* {{PAGENAME}}', false, Title::newFromText( 'Talk:Some page' ), false ],
                    "<p>* Some page</p>",
                ], 'Untidy input' => [
                    [ '<b>{{PAGENAME}}', true, Title::newFromText( 'Talk:Some page' ) ],
                    "<p><b>Some page\n</b></p>",
                ],
            ],
            'addWikiTextAsContent' => [
                // Preferred interface: output is tidied
                'SpecialNewimages' => [
                    [ "<p lang='en' dir='ltr'>\nMy message" ],
                    '<p lang="en" dir="ltr">' . "\nMy message\n</p>"
                ], 'List at start' => [
                    [ '* List' ],
                    "<ul><li>List</li></ul>\n",
                ], 'List not at start' => [
                    [ '* <b>Not a list', false ],
                    '<p>* <b>Not a list</b></p>',
                ], 'With title at start' => [
                    [ '* {{PAGENAME}}', true, Title::newFromText( 'Talk:Some page' ) ],
                    "<ul><li>Some page</li></ul>\n",
                ], 'With title at start' => [
                    [ '* {{PAGENAME}}', false, Title::newFromText( 'Talk:Some page' ), false ],
                    "<p>* Some page</p>",
                ], 'EditPage' => [
                    [ "<div class='mw-editintro'>{{PAGENAME}}", true, Title::newFromText( 'Talk:Some page' ) ],
                    '<div class="mw-editintro">' . "Some page\n</div>"
                ],
            ],
            'wrapWikiTextAsInterface' => [
                'Simple' => [
                    [ 'wrapperClass', 'text' ],
                    "<div class=\"wrapperClass\"><p>text\n</p></div>"
                ], 'Spurious </div>' => [
                    [ 'wrapperClass', 'text</div><div>more' ],
                    "<div class=\"wrapperClass\"><p>text</p><div>more\n</div></div>"
                ], 'Extra newlines would break <p> wrappers' => [
                    [ 'two classes', "1\n\n2\n\n3" ],
                    "<div class=\"two classes\"><p>1\n</p><p>2\n</p><p>3\n</p></div>"
                ], 'Other unclosed tags' => [
                    [ 'error', 'a<b>c<i>d' ],
                    "<div class=\"error\"><p>a<b>c<i>d\n</i></b></p></div>"
                ],
            ],
        ];
 
        // Test all the others on addWikiTextTitle as well
        foreach ( $tests['addWikiText'] as $key => $val ) {
            $args = [ $val[0][0], null, $val[0][1] ?? true, false, $val[0][2] ?? true ];
            $tests['addWikiTextTitle']["$key (addWikiTextTitle)"] =
                array_merge( [ $args ], array_slice( $val, 1 ) );
        }
        foreach ( $tests['addWikiTextWithTitle'] as $key => $val ) {
            $args = [ $val[0][0], $val[0][1], $val[0][2] ?? true ];
            $tests['addWikiTextTitle']["$key (addWikiTextTitle)"] =
                array_merge( [ $args ], array_slice( $val, 1 ) );
        }
        foreach ( $tests['addWikiTextAsInterface'] as $key => $val ) {
            $args = [ $val[0][0], $val[0][2] ?? null, $val[0][1] ?? true, true, true ];
            $tests['addWikiTextTitle']["$key (addWikiTextTitle)"] =
                array_merge( [ $args ], array_slice( $val, 1 ) );
        }
        foreach ( $tests['addWikiTextAsContent'] as $key => $val ) {
            $args = [ $val[0][0], $val[0][2] ?? null, $val[0][1] ?? true, true, false ];
            $tests['addWikiTextTitle']["$key (addWikiTextTitle)"] =
                array_merge( [ $args ], array_slice( $val, 1 ) );
        }
        // addWikiTextTidy / addWikiTextTitleTidy were old aliases of
        // addWikiTextAsContent
        foreach ( $tests['addWikiTextAsContent'] as $key => $val ) {
            if ( count( $val[0] ) > 2 ) {
                $args = [ $val[0][0], $val[0][2], $val[0][1] ?? true ];
                $tests['addWikiTextTitleTidy']["$key (addWikiTextTitleTidy)"] =
                    array_merge( [ $args ], array_slice( $val, 1 ) );
            } else {
                $args = [ $val[0][0], $val[0][1] ?? true ];
                $tests['addWikiTextTidy']["$key (addWikiTextTidy)"] =
                    array_merge( [ $args ], array_slice( $val, 1 ) );
            }
        }
 
        // We have to reformat our array to match what PHPUnit wants
        $ret = [];
        foreach ( $tests as $key => $subarray ) {
            foreach ( $subarray as $subkey => $val ) {
                $val = array_merge( [ $key ], $val );
                $ret[$subkey] = $val;
            }
        }
 
        return $ret;
    }
 
    public function testAddWikiTextNoTitle() {
        $this->setExpectedException( MWException::class, 'Title is null' );
 
        $op = $this->newInstance( [], null, 'notitle' );
        $op->addWikiText( 'a' );
    }
 
    public function testAddWikiTextAsInterfaceNoTitle() {
        $this->setExpectedException( MWException::class, 'Title is null' );
 
        $op = $this->newInstance( [], null, 'notitle' );
        $op->addWikiTextAsInterface( 'a' );
    }
 
    public function testAddWikiTextAsContentNoTitle() {
        $this->setExpectedException( MWException::class, 'Title is null' );
 
        $op = $this->newInstance( [], null, 'notitle' );
        $op->addWikiTextAsContent( 'a' );
    }
 
    public function testAddWikiMsg() {
        $msg = wfMessage( 'parentheses' );
        $this->assertSame( '(a)', $msg->rawParams( 'a' )->plain() );
 
        $op = $this->newInstance();
        $this->assertSame( '', $op->getHTML() );
        $op->addWikiMsg( 'parentheses', "<b>a" );
        // This is known to be bad unbalanced HTML; this will be fixed
        // by I743f4185a03403f8d9b9db010ff1ee4e9342e062 (T198214)
        $this->assertSame( "<p>(<b>a)\n</p>", $op->getHTML() );
    }
 
    public function testWrapWikiMsg() {
        $msg = wfMessage( 'parentheses' );
        $this->assertSame( '(a)', $msg->rawParams( 'a' )->plain() );
 
        $op = $this->newInstance();
        $this->assertSame( '', $op->getHTML() );
        $op->wrapWikiMsg( '[$1]', [ 'parentheses', "<b>a" ] );
        // This is known to be bad unbalanced HTML; this will be fixed
        // by I743f4185a03403f8d9b9db010ff1ee4e9342e062 (T198214)
        $this->assertSame( "<p>[(<b>a)]\n</p>", $op->getHTML() );
    }
 
    public function testNoGallery() {
        $op = $this->newInstance();
        $this->assertFalse( $op->mNoGallery );
 
        $stubPO1 = $this->createParserOutputStub( 'getNoGallery', true );
        $op->addParserOutputMetadata( $stubPO1 );
        $this->assertTrue( $op->mNoGallery );
 
        $stubPO2 = $this->createParserOutputStub( 'getNoGallery', false );
        $op->addParserOutput( $stubPO2 );
        $this->assertFalse( $op->mNoGallery );
    }
 
    private static $parserOutputHookCalled;
 
    public function testParserOutputHooks() {
        $op = $this->newInstance();
        $pOut = $this->createParserOutputStub( 'getOutputHooks', [
            [ 'myhook', 'banana' ],
            [ 'yourhook', 'kumquat' ],
            [ 'theirhook', 'hippopotamus' ],
        ] );
 
        self::$parserOutputHookCalled = [];
 
        $this->setMwGlobals( 'wgParserOutputHooks', [
            'myhook' => function ( OutputPage $innerOp, ParserOutput $innerPOut, $data )
            use ( $op, $pOut ) {
                $this->assertSame( $op, $innerOp );
                $this->assertSame( $pOut, $innerPOut );
                $this->assertSame( 'banana', $data );
                self::$parserOutputHookCalled[] = 'closure';
            },
            'yourhook' => [ $this, 'parserOutputHookCallback' ],
            'theirhook' => [ __CLASS__, 'parserOutputHookCallbackStatic' ],
            'uncalled' => function () {
                $this->assertTrue( false );
            },
        ] );
 
        $op->addParserOutputMetadata( $pOut );
 
        $this->assertSame( [ 'closure', 'callback', 'static' ], self::$parserOutputHookCalled );
    }
 
    public function parserOutputHookCallback(
        OutputPage $op, ParserOutput $pOut, $data
    ) {
        $this->assertSame( 'kumquat', $data );
 
        self::$parserOutputHookCalled[] = 'callback';
    }
 
    public static function parserOutputHookCallbackStatic(
        OutputPage $op, ParserOutput $pOut, $data
    ) {
        // All the assert methods are actually static, who knew!
        self::assertSame( 'hippopotamus', $data );
 
        self::$parserOutputHookCalled[] = 'static';
    }
 
    // @todo Make sure to test the following in addParserOutputMetadata() as well when we add tests
    // for them:
    //   * addModules()
    //   * addModuleScripts()
    //   * addModuleStyles()
    //   * addJsConfigVars()
    //   * enableOOUI()
    // Otherwise those lines of addParserOutputMetadata() will be reported as covered, but we won't
    // be testing they actually work.
 
    public function testAddParserOutputText() {
        $op = $this->newInstance();
        $this->assertSame( '', $op->getHTML() );
 
        $pOut = $this->createParserOutputStub( 'getText', '<some text>' );
 
        $op->addParserOutputMetadata( $pOut );
        $this->assertSame( '', $op->getHTML() );
 
        $op->addParserOutputText( $pOut );
        $this->assertSame( '<some text>', $op->getHTML() );
    }
 
    public function testAddParserOutput() {
        $op = $this->newInstance();
        $this->assertSame( '', $op->getHTML() );
        $this->assertFalse( $op->showNewSectionLink() );
 
        $pOut = $this->createParserOutputStub( [
            'getText' => '<some text>',
            'getNewSection' => true,
        ] );
 
        $op->addParserOutput( $pOut );
        $this->assertSame( '<some text>', $op->getHTML() );
        $this->assertTrue( $op->showNewSectionLink() );
    }
 
    public function testAddTemplate() {
        $template = $this->getMock( QuickTemplate::class );
        $template->method( 'getHTML' )->willReturn( '<abc>&def;' );
 
        $op = $this->newInstance();
        $op->addTemplate( $template );
 
        $this->assertSame( '<abc>&def;', $op->getHTML() );
    }
 
    public function testParse( array $args, $expectedHTML ) {
        $op = $this->newInstance();
        $this->assertSame( $expectedHTML, $op->parse( ...$args ) );
    }
 
    public function testParseInline( array $args, $expectedHTML, $expectedHTMLInline = null ) {
        if ( count( $args ) > 3 ) {
            // $language param not supported
            $this->assertTrue( true );
            return;
        }
        $op = $this->newInstance();
        $this->assertSame( $expectedHTMLInline ?? $expectedHTML, $op->parseInline( ...$args ) );
    }
 
    public function provideParse() {
        return [
            'List at start of line (content)' => [
                [ '* List', true, false ],
                "<div class=\"mw-parser-output\"><ul><li>List</li></ul>\n</div>",
                "<ul><li>List</li></ul>\n",
            ],
            'List at start of line (interface)' => [
                [ '* List', true, true ],
                "<ul><li>List</li></ul>\n",
            ],
            'List not at start (content)' => [
                [ "* ''Not'' list", false, false ],
                '<div class="mw-parser-output">* <i>Not</i> list</div>',
                '* <i>Not</i> list',
            ],
            'List not at start (interface)' => [
                [ "* ''Not'' list", false, true ],
                '* <i>Not</i> list',
            ],
            'Interface message' => [
                [ "''Italic''", true, true ],
                "<p><i>Italic</i>\n</p>",
                '<i>Italic</i>',
            ],
            'formatnum (content)' => [
                [ '{{formatnum:123456.789}}', true, false ],
                "<div class=\"mw-parser-output\"><p>123,456.789\n</p></div>",
                "123,456.789",
            ],
            'formatnum (interface)' => [
                [ '{{formatnum:123456.789}}', true, true ],
                "<p>123,456.789\n</p>",
                "123,456.789",
            ],
            'Language (content)' => [
                [ '{{formatnum:123456.789}}', true, false, Language::factory( 'is' ) ],
                "<div class=\"mw-parser-output\"><p>123.456,789\n</p></div>",
            ],
            'Language (interface)' => [
                [ '{{formatnum:123456.789}}', true, true, Language::factory( 'is' ) ],
                "<p>123.456,789\n</p>",
                '123.456,789',
            ],
            'No section edit links' => [
                [ '== Header ==' ],
                '<div class="mw-parser-output"><h2><span class="mw-headline" id="Header">' .
                    "Header</span></h2>\n</div>",
                '<h2><span class="mw-headline" id="Header">Header</span></h2>' .
                    "\n",
            ]
        ];
    }
 
    public function testParseAsContent(
        array $args, $expectedHTML, $expectedHTMLInline = null
    ) {
        $op = $this->newInstance();
        $this->assertSame( $expectedHTML, $op->parseAsContent( ...$args ) );
    }
 
    public function testParseAsInterface(
        array $args, $expectedHTML, $expectedHTMLInline = null
    ) {
        $op = $this->newInstance();
        $this->assertSame( $expectedHTML, $op->parseAsInterface( ...$args ) );
    }
 
    public function testParseInlineAsInterface(
        array $args, $expectedHTML, $expectedHTMLInline = null
    ) {
        $op = $this->newInstance();
        $this->assertSame(
            $expectedHTMLInline ?? $expectedHTML,
            $op->parseInlineAsInterface( ...$args )
        );
    }
 
    public function provideParseAs() {
        return [
            'List at start of line' => [
                [ '* List', true ],
                "<ul><li>List</li></ul>\n",
            ],
            'List not at start' => [
                [ "* ''Not'' list", false ],
                '<p>* <i>Not</i> list</p>',
                '* <i>Not</i> list',
            ],
            'Italics' => [
                [ "''Italic''", true ],
                "<p><i>Italic</i>\n</p>",
                '<i>Italic</i>',
            ],
            'formatnum' => [
                [ '{{formatnum:123456.789}}', true ],
                "<p>123,456.789\n</p>",
                "123,456.789",
            ],
            'No section edit links' => [
                [ '== Header ==' ],
                '<h2><span class="mw-headline" id="Header">Header</span></h2>' .
                    "\n",
            ]
        ];
    }
 
    public function testParseNullTitle() {
        $this->setExpectedException( MWException::class, 'Empty $mTitle in OutputPage::parseInternal' );
        $op = $this->newInstance( [], null, 'notitle' );
        $op->parse( '' );
    }
 
    public function testParseInlineNullTitle() {
        $this->setExpectedException( MWException::class, 'Empty $mTitle in OutputPage::parseInternal' );
        $op = $this->newInstance( [], null, 'notitle' );
        $op->parseInline( '' );
    }
 
    public function testParseAsContentNullTitle() {
        $this->setExpectedException( MWException::class, 'Empty $mTitle in OutputPage::parseInternal' );
        $op = $this->newInstance( [], null, 'notitle' );
        $op->parseAsContent( '' );
    }
 
    public function testParseAsInterfaceNullTitle() {
        $this->setExpectedException( MWException::class, 'Empty $mTitle in OutputPage::parseInternal' );
        $op = $this->newInstance( [], null, 'notitle' );
        $op->parseAsInterface( '' );
    }
 
    public function testParseInlineAsInterfaceNullTitle() {
        $this->setExpectedException( MWException::class, 'Empty $mTitle in OutputPage::parseInternal' );
        $op = $this->newInstance( [], null, 'notitle' );
        $op->parseInlineAsInterface( '' );
    }
 
    public function testCdnMaxage() {
        $op = $this->newInstance();
        $wrapper = TestingAccessWrapper::newFromObject( $op );
        $this->assertSame( 0, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( -1 );
        $this->assertSame( -1, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( 120 );
        $this->assertSame( 120, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( 60 );
        $this->assertSame( 60, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( 180 );
        $this->assertSame( 180, $wrapper->mCdnMaxage );
 
        $op->lowerCdnMaxage( 240 );
        $this->assertSame( 180, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( 300 );
        $this->assertSame( 240, $wrapper->mCdnMaxage );
 
        $op->lowerCdnMaxage( 120 );
        $this->assertSame( 120, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( 180 );
        $this->assertSame( 120, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( 60 );
        $this->assertSame( 60, $wrapper->mCdnMaxage );
 
        $op->setCdnMaxage( 240 );
        $this->assertSame( 120, $wrapper->mCdnMaxage );
    }
 
    private static $fakeTime;
 
    public function testAdaptCdnTTL( array $args, $expected, array $options = [] ) {
        try {
            MWTimestamp::setFakeTime( self::$fakeTime );
 
            $op = $this->newInstance();
            // Set a high maxage so that it will get reduced by adaptCdnTTL().  The default maxage
            // is 0, so adaptCdnTTL() won't mutate the object at all.
            $initial = $options['initialMaxage'] ?? 86400;
            $op->setCdnMaxage( $initial );
 
            $op->adaptCdnTTL( ...$args );
        } finally {
            MWTimestamp::setFakeTime( false );
        }
 
        $wrapper = TestingAccessWrapper::newFromObject( $op );
 
        // Special rules for false/null
        if ( $args[0] === null || $args[0] === false ) {
            $this->assertSame( $initial, $wrapper->mCdnMaxage, 'member value' );
            $op->setCdnMaxage( $expected + 1 );
            $this->assertSame( $expected + 1, $wrapper->mCdnMaxage, 'member value after new set' );
            return;
        }
 
        $this->assertSame( $expected, $wrapper->mCdnMaxageLimit, 'limit value' );
 
        if ( $initial >= $expected ) {
            $this->assertSame( $expected, $wrapper->mCdnMaxage, 'member value' );
        } else {
            $this->assertSame( $initial, $wrapper->mCdnMaxage, 'member value' );
        }
 
        $op->setCdnMaxage( $expected + 1 );
        $this->assertSame( $expected, $wrapper->mCdnMaxage, 'member value after new set' );
    }
 
    public function provideAdaptCdnTTL() {
        global $wgSquidMaxage;
        $now = time();
        self::$fakeTime = $now;
        return [
            'Five minutes ago' => [ [ $now - 300 ], 270 ],
            'Now' => [ [ +0 ], IExpiringStore::TTL_MINUTE ],
            'Five minutes from now' => [ [ $now + 300 ], IExpiringStore::TTL_MINUTE ],
            'Five minutes ago, initial maxage four minutes' =>
                [ [ $now - 300 ], 270, [ 'initialMaxage' => 240 ] ],
            'A very long time ago' => [ [ $now - 1000000000 ], $wgSquidMaxage ],
            'Initial maxage zero' => [ [ $now - 300 ], 270, [ 'initialMaxage' => 0 ] ],
 
            'false' => [ [ false ], IExpiringStore::TTL_MINUTE ],
            'null' => [ [ null ], IExpiringStore::TTL_MINUTE ],
            "'0'" => [ [ '0' ], IExpiringStore::TTL_MINUTE ],
            'Empty string' => [ [ '' ], IExpiringStore::TTL_MINUTE ],
            // @todo These give incorrect results due to timezones, how to test?
            //"'now'" => [ [ 'now' ], IExpiringStore::TTL_MINUTE ],
            //"'parse error'" => [ [ 'parse error' ], IExpiringStore::TTL_MINUTE ],
 
            'Now, minTTL 0' => [ [ $now, 0 ], IExpiringStore::TTL_MINUTE ],
            'Now, minTTL 0.000001' => [ [ $now, 0.000001 ], 0 ],
            'A very long time ago, maxTTL even longer' =>
                [ [ $now - 1000000000, 0, 1000000001 ], 900000000 ],
        ];
    }
 
    public function testClientCache() {
        $op = $this->newInstance();
 
        // Test initial value
        $this->assertSame( true, $op->enableClientCache( null ) );
        // Test that calling with null doesn't change the value
        $this->assertSame( true, $op->enableClientCache( null ) );
 
        // Test setting to false
        $this->assertSame( true, $op->enableClientCache( false ) );
        $this->assertSame( false, $op->enableClientCache( null ) );
        // Test that calling with null doesn't change the value
        $this->assertSame( false, $op->enableClientCache( null ) );
 
        // Test that a cacheable ParserOutput doesn't set to true
        $pOutCacheable = $this->createParserOutputStub( 'isCacheable', true );
        $op->addParserOutputMetadata( $pOutCacheable );
        $this->assertSame( false, $op->enableClientCache( null ) );
 
        // Test setting back to true
        $this->assertSame( false, $op->enableClientCache( true ) );
        $this->assertSame( true, $op->enableClientCache( null ) );
 
        // Test that an uncacheable ParserOutput does set to false
        $pOutUncacheable = $this->createParserOutputStub( 'isCacheable', false );
        $op->addParserOutput( $pOutUncacheable );
        $this->assertSame( false, $op->enableClientCache( null ) );
    }
 
    public function testGetCacheVaryCookies() {
        global $wgCookiePrefix, $wgDBname;
        $op = $this->newInstance();
        $prefix = $wgCookiePrefix !== false ? $wgCookiePrefix : $wgDBname;
        $expectedCookies = [
            "{$prefix}Token",
            "{$prefix}LoggedOut",
            "{$prefix}_session",
            'forceHTTPS',
            'cookie1',
            'cookie2',
        ];
 
        // We have to reset the cookies because getCacheVaryCookies may have already been called
        TestingAccessWrapper::newFromClass( OutputPage::class )->cacheVaryCookies = null;
 
        $this->setMwGlobals( 'wgCacheVaryCookies', [ 'cookie1' ] );
        $this->setTemporaryHook( 'GetCacheVaryCookies',
            function ( $innerOP, &$cookies ) use ( $op, $expectedCookies ) {
                $this->assertSame( $op, $innerOP );
                $cookies[] = 'cookie2';
                $this->assertSame( $expectedCookies, $cookies );
            }
        );
 
        $this->assertSame( $expectedCookies, $op->getCacheVaryCookies() );
    }
 
    public function testHaveCacheVaryCookies() {
        $request = new FauxRequest();
        $op = $this->newInstance( [], $request );
 
        // No cookies are set.
        $this->assertFalse( $op->haveCacheVaryCookies() );
 
        // 'Token' is present but empty, so it shouldn't count.
        $request->setCookie( 'Token', '' );
        $this->assertFalse( $op->haveCacheVaryCookies() );
 
        // 'Token' present and nonempty.
        $request->setCookie( 'Token', '123' );
        $this->assertTrue( $op->haveCacheVaryCookies() );
    }
 
    public function testVaryHeaders( array $calls, array $cookies, $vary, $key ) {
        // Get rid of default Vary fields
        $op = $this->getMockBuilder( OutputPage::class )
            ->setConstructorArgs( [ new RequestContext() ] )
            ->setMethods( [ 'getCacheVaryCookies' ] )
            ->getMock();
        $op->expects( $this->any() )
            ->method( 'getCacheVaryCookies' )
            ->will( $this->returnValue( $cookies ) );
        TestingAccessWrapper::newFromObject( $op )->mVaryHeader = [];
 
        $this->hideDeprecated( '$wgUseKeyHeader' );
        foreach ( $calls as $call ) {
            $op->addVaryHeader( ...$call );
        }
        $this->assertEquals( $vary, $op->getVaryHeader(), 'Vary:' );
        $this->assertEquals( $key, $op->getKeyHeader(), 'Key:' );
    }
 
    public function provideVaryHeaders() {
        // note: getKeyHeader() automatically adds Vary: Cookie
        return [
            'No header' => [
                [],
                [],
                'Vary: ',
                'Key: Cookie',
            ],
            'Single header' => [
                [
                    [ 'Cookie' ],
                ],
                [],
                'Vary: Cookie',
                'Key: Cookie',
            ],
            'Non-unique headers' => [
                [
                    [ 'Cookie' ],
                    [ 'Accept-Language' ],
                    [ 'Cookie' ],
                ],
                [],
                'Vary: Cookie, Accept-Language',
                'Key: Cookie,Accept-Language',
            ],
            'Two headers with single options' => [
                [
                    [ 'Cookie', [ 'param=phpsessid' ] ],
                    [ 'Accept-Language', [ 'substr=en' ] ],
                ],
                [],
                'Vary: Cookie, Accept-Language',
                'Key: Cookie;param=phpsessid,Accept-Language;substr=en',
            ],
            'One header with multiple options' => [
                [
                    [ 'Cookie', [ 'param=phpsessid', 'param=userId' ] ],
                ],
                [],
                'Vary: Cookie',
                'Key: Cookie;param=phpsessid;param=userId',
            ],
            'Duplicate option' => [
                [
                    [ 'Cookie', [ 'param=phpsessid' ] ],
                    [ 'Cookie', [ 'param=phpsessid' ] ],
                    [ 'Accept-Language', [ 'substr=en', 'substr=en' ] ],
                ],
                [],
                'Vary: Cookie, Accept-Language',
                'Key: Cookie;param=phpsessid,Accept-Language;substr=en',
            ],
            'Same header, different options' => [
                [
                    [ 'Cookie', [ 'param=phpsessid' ] ],
                    [ 'Cookie', [ 'param=userId' ] ],
                ],
                [],
                'Vary: Cookie',
                'Key: Cookie;param=phpsessid;param=userId',
            ],
            'No header, vary cookies' => [
                [],
                [ 'cookie1', 'cookie2' ],
                'Vary: Cookie',
                'Key: Cookie;param=cookie1;param=cookie2',
            ],
            'Cookie header with option plus vary cookies' => [
                [
                    [ 'Cookie', [ 'param=cookie1' ] ],
                ],
                [ 'cookie2', 'cookie3' ],
                'Vary: Cookie',
                'Key: Cookie;param=cookie1;param=cookie2;param=cookie3',
            ],
            'Non-cookie header plus vary cookies' => [
                [
                    [ 'Accept-Language' ],
                ],
                [ 'cookie' ],
                'Vary: Accept-Language, Cookie',
                'Key: Accept-Language,Cookie;param=cookie',
            ],
            'Cookie and non-cookie headers plus vary cookies' => [
                [
                    [ 'Cookie', [ 'param=cookie1' ] ],
                    [ 'Accept-Language' ],
                ],
                [ 'cookie2' ],
                'Vary: Cookie, Accept-Language',
                'Key: Cookie;param=cookie1;param=cookie2,Accept-Language',
            ],
        ];
    }
 
    public function testVaryHeaderDefault() {
        $op = $this->newInstance();
        $this->assertSame( 'Vary: Accept-Encoding, Cookie', $op->getVaryHeader() );
    }
 
    public function testLinkHeaders( array $headers, $result ) {
        $op = $this->newInstance();
 
        foreach ( $headers as $header ) {
            $op->addLinkHeader( $header );
        }
 
        $this->assertEquals( $result, $op->getLinkHeader() );
    }
 
    public function provideLinkHeaders() {
        return [
            [
                [],
                false
            ],
            [
                [ '<https://foo/bar.jpg>;rel=preload;as=image' ],
                'Link: <https://foo/bar.jpg>;rel=preload;as=image',
            ],
            [
                [
                    '<https://foo/bar.jpg>;rel=preload;as=image',
                    '<https://foo/baz.jpg>;rel=preload;as=image'
                ],
                'Link: <https://foo/bar.jpg>;rel=preload;as=image,<https://foo/baz.jpg>;' .
                    'rel=preload;as=image',
            ],
        ];
    }
 
    public function testAddAcceptLanguage(
        $code, array $variants, array $expected, array $options = []
    ) {
        $req = new FauxRequest( in_array( 'varianturl', $options ) ? [ 'variant' => 'x' ] : [] );
        $op = $this->newInstance( [], $req, in_array( 'notitle', $options ) ? 'notitle' : null );
 
        if ( !in_array( 'notitle', $options ) ) {
            $mockLang = $this->getMock( Language::class );
 
            if ( in_array( 'varianturl', $options ) ) {
                $mockLang->expects( $this->never() )->method( $this->anything() );
            } else {
                $mockLang->method( 'hasVariants' )->willReturn( count( $variants ) > 1 );
                $mockLang->method( 'getVariants' )->willReturn( $variants );
                $mockLang->method( 'getCode' )->willReturn( $code );
            }
 
            $mockTitle = $this->getMock( Title::class );
            $mockTitle->method( 'getPageLanguage' )->willReturn( $mockLang );
 
            $op->setTitle( $mockTitle );
        }
 
        // This will run addAcceptLanguage()
        $op->sendCacheControl();
 
        $this->hideDeprecated( '$wgUseKeyHeader' );
        $keyHeader = $op->getKeyHeader();
 
        if ( !$expected ) {
            $this->assertFalse( strpos( 'Accept-Language', $keyHeader ) );
            return;
        }
 
        $keyHeader = explode( ' ', $keyHeader, 2 )[1];
        $keyHeader = explode( ',', $keyHeader );
 
        $acceptLanguage = null;
        foreach ( $keyHeader as $item ) {
            if ( strpos( $item, 'Accept-Language;' ) === 0 ) {
                $acceptLanguage = $item;
                break;
            }
        }
 
        $expectedString = 'Accept-Language;substr=' . implode( ';substr=', $expected );
        $this->assertSame( $expectedString, $acceptLanguage );
    }
 
    public function provideAddAcceptLanguage() {
        return [
            'No variants' => [ 'en', [ 'en' ], [] ],
            'One simple variant' => [ 'en', [ 'en', 'en-x-piglatin' ], [ 'en-x-piglatin' ] ],
            'Multiple variants with BCP47 alternatives' => [
                'zh',
                [ 'zh', 'zh-hans', 'zh-cn', 'zh-tw' ],
                [ 'zh-hans', 'zh-Hans', 'zh-cn', 'zh-Hans-CN', 'zh-tw', 'zh-Hant-TW' ],
            ],
            'No title' => [ 'en', [ 'en', 'en-x-piglatin' ], [], [ 'notitle' ] ],
            'Variant in URL' => [ 'en', [ 'en', 'en-x-piglatin' ], [], [ 'varianturl' ] ],
        ];
    }
 
    public function testClickjacking() {
        $op = $this->newInstance();
        $this->assertTrue( $op->getPreventClickjacking() );
 
        $op->allowClickjacking();
        $this->assertFalse( $op->getPreventClickjacking() );
 
        $op->preventClickjacking();
        $this->assertTrue( $op->getPreventClickjacking() );
 
        $op->preventClickjacking( false );
        $this->assertFalse( $op->getPreventClickjacking() );
 
        $pOut1 = $this->createParserOutputStub( 'preventClickjacking', true );
        $op->addParserOutputMetadata( $pOut1 );
        $this->assertTrue( $op->getPreventClickjacking() );
 
        // The ParserOutput can't allow, only prevent
        $pOut2 = $this->createParserOutputStub( 'preventClickjacking', false );
        $op->addParserOutputMetadata( $pOut2 );
        $this->assertTrue( $op->getPreventClickjacking() );
 
        // Reset to test with addParserOutput()
        $op->allowClickjacking();
        $this->assertFalse( $op->getPreventClickjacking() );
 
        $op->addParserOutput( $pOut1 );
        $this->assertTrue( $op->getPreventClickjacking() );
 
        $op->addParserOutput( $pOut2 );
        $this->assertTrue( $op->getPreventClickjacking() );
    }
 
    public function testGetFrameOptions(
        $breakFrames, $preventClickjacking, $editPageFrameOptions, $expected
    ) {
        $op = $this->newInstance( [
            'BreakFrames' => $breakFrames,
            'EditPageFrameOptions' => $editPageFrameOptions,
        ] );
        $op->preventClickjacking( $preventClickjacking );
 
        $this->assertSame( $expected, $op->getFrameOptions() );
    }
 
    public function provideGetFrameOptions() {
        return [
            'BreakFrames true' => [ true, false, false, 'DENY' ],
            'Allow clickjacking locally' => [ false, false, 'DENY', false ],
            'Allow clickjacking globally' => [ false, true, false, false ],
            'DENY globally' => [ false, true, 'DENY', 'DENY' ],
            'SAMEORIGIN' => [ false, true, 'SAMEORIGIN', 'SAMEORIGIN' ],
            'BreakFrames with SAMEORIGIN' => [ true, true, 'SAMEORIGIN', 'DENY' ],
        ];
    }
 
    public function testMakeResourceLoaderLink( $args, $expectedHtml ) {
        $this->setMwGlobals( [
            'wgResourceLoaderDebug' => false,
            'wgLoadScript' => 'http://127.0.0.1:8080/w/load.php',
            'wgCSPReportOnlyHeader' => true,
        ] );
        $class = new ReflectionClass( OutputPage::class );
        $method = $class->getMethod( 'makeResourceLoaderLink' );
        $method->setAccessible( true );
        $ctx = new RequestContext();
        $ctx->setSkin( SkinFactory::getDefaultInstance()->makeSkin( 'fallback' ) );
        $ctx->setLanguage( 'en' );
        $out = new OutputPage( $ctx );
        $nonce = $class->getProperty( 'CSPNonce' );
        $nonce->setAccessible( true );
        $nonce->setValue( $out, 'secret' );
        $rl = $out->getResourceLoader();
        $rl->setMessageBlobStore( new NullMessageBlobStore() );
        $rl->register( [
            'test.foo' => new ResourceLoaderTestModule( [
                'script' => 'mw.test.foo( { a: true } );',
                'styles' => '.mw-test-foo { content: "style"; }',
            ] ),
            'test.bar' => new ResourceLoaderTestModule( [
                'script' => 'mw.test.bar( { a: true } );',
                'styles' => '.mw-test-bar { content: "style"; }',
            ] ),
            'test.baz' => new ResourceLoaderTestModule( [
                'script' => 'mw.test.baz( { a: true } );',
                'styles' => '.mw-test-baz { content: "style"; }',
            ] ),
            'test.quux' => new ResourceLoaderTestModule( [
                'script' => 'mw.test.baz( { token: 123 } );',
                'styles' => '/* pref-animate=off */ .mw-icon { transition: none; }',
                'group' => 'private',
            ] ),
            'test.noscript' => new ResourceLoaderTestModule( [
                'styles' => '.stuff { color: red; }',
                'group' => 'noscript',
            ] ),
            'test.group.foo' => new ResourceLoaderTestModule( [
                'script' => 'mw.doStuff( "foo" );',
                'group' => 'foo',
            ] ),
            'test.group.bar' => new ResourceLoaderTestModule( [
                'script' => 'mw.doStuff( "bar" );',
                'group' => 'bar',
            ] ),
        ] );
        $links = $method->invokeArgs( $out, $args );
        $actualHtml = strval( $links );
        $this->assertEquals( $expectedHtml, $actualHtml );
    }
 
    public static function provideMakeResourceLoaderLink() {
        // phpcs:disable Generic.Files.LineLength
        return [
            // Single only=scripts load
            [
                [ 'test.foo', ResourceLoaderModule::TYPE_SCRIPTS ],
                "<script nonce=\"secret\">(window.RLQ=window.RLQ||[]).push(function(){"
                    . 'mw.loader.load("http://127.0.0.1:8080/w/load.php?debug=false\u0026lang=en\u0026modules=test.foo\u0026only=scripts\u0026skin=fallback");'
                    . "});</script>"
            ],
            // Multiple only=styles load
            [
                [ [ 'test.baz', 'test.foo', 'test.bar' ], ResourceLoaderModule::TYPE_STYLES ],
 
                '<link rel="stylesheet" href="http://127.0.0.1:8080/w/load.php?debug=false&amp;lang=en&amp;modules=test.bar%2Cbaz%2Cfoo&amp;only=styles&amp;skin=fallback"/>'
            ],
            // Private embed (only=scripts)
            [
                [ 'test.quux', ResourceLoaderModule::TYPE_SCRIPTS ],
                "<script nonce=\"secret\">(window.RLQ=window.RLQ||[]).push(function(){"
                    . "mw.test.baz({token:123});\nmw.loader.state({\"test.quux\":\"ready\"});"
                    . "});</script>"
            ],
            // Load private module (combined)
            [
                [ 'test.quux', ResourceLoaderModule::TYPE_COMBINED ],
                "<script nonce=\"secret\">(window.RLQ=window.RLQ||[]).push(function(){"
                    . "mw.loader.implement(\"test.quux@1ev0ijv\",function($,jQuery,require,module){"
                    . "mw.test.baz({token:123});},{\"css\":[\".mw-icon{transition:none}"
                    . "\"]});});</script>"
            ],
            // Load no modules
            [
                [ [], ResourceLoaderModule::TYPE_COMBINED ],
                '',
            ],
            // noscript group
            [
                [ 'test.noscript', ResourceLoaderModule::TYPE_STYLES ],
                '<noscript><link rel="stylesheet" href="http://127.0.0.1:8080/w/load.php?debug=false&amp;lang=en&amp;modules=test.noscript&amp;only=styles&amp;skin=fallback"/></noscript>'
            ],
            // Load two modules in separate groups
            [
                [ [ 'test.group.foo', 'test.group.bar' ], ResourceLoaderModule::TYPE_COMBINED ],
                "<script nonce=\"secret\">(window.RLQ=window.RLQ||[]).push(function(){"
                    . 'mw.loader.load("http://127.0.0.1:8080/w/load.php?debug=false\u0026lang=en\u0026modules=test.group.bar\u0026skin=fallback");'
                    . 'mw.loader.load("http://127.0.0.1:8080/w/load.php?debug=false\u0026lang=en\u0026modules=test.group.foo\u0026skin=fallback");'
                    . "});</script>"
            ],
        ];
        // phpcs:enable
    }
 
    public function testBuildExemptModules( array $exemptStyleModules, $expect ) {
        $this->setMwGlobals( [
            'wgResourceLoaderDebug' => false,
            'wgLoadScript' => '/w/load.php',
            // Stub wgCacheEpoch as it influences getVersionHash used for the
            // urls in the expected HTML
            'wgCacheEpoch' => '20140101000000',
        ] );
 
        // Set up stubs
        $ctx = new RequestContext();
        $ctx->setSkin( SkinFactory::getDefaultInstance()->makeSkin( 'fallback' ) );
        $ctx->setLanguage( 'en' );
        $op = $this->getMockBuilder( OutputPage::class )
            ->setConstructorArgs( [ $ctx ] )
            ->setMethods( [ 'buildCssLinksArray' ] )
            ->getMock();
        $op->expects( $this->any() )
            ->method( 'buildCssLinksArray' )
            ->willReturn( [] );
        $rl = $op->getResourceLoader();
        $rl->setMessageBlobStore( new NullMessageBlobStore() );
 
        // Register custom modules
        $rl->register( [
            'example.site.a' => new ResourceLoaderTestModule( [ 'group' => 'site' ] ),
            'example.site.b' => new ResourceLoaderTestModule( [ 'group' => 'site' ] ),
            'example.user' => new ResourceLoaderTestModule( [ 'group' => 'user' ] ),
        ] );
 
        $op = TestingAccessWrapper::newFromObject( $op );
        $op->rlExemptStyleModules = $exemptStyleModules;
        $this->assertEquals(
            $expect,
            strval( $op->buildExemptModules() )
        );
    }
 
    public static function provideBuildExemptModules() {
        // phpcs:disable Generic.Files.LineLength
        return [
            'empty' => [
                'exemptStyleModules' => [],
                '<meta name="ResourceLoaderDynamicStyles" content=""/>',
            ],
            'empty sets' => [
                'exemptStyleModules' => [ 'site' => [], 'noscript' => [], 'private' => [], 'user' => [] ],
                '<meta name="ResourceLoaderDynamicStyles" content=""/>',
            ],
            'default logged-out' => [
                'exemptStyleModules' => [ 'site' => [ 'site.styles' ] ],
                '<meta name="ResourceLoaderDynamicStyles" content=""/>' . "\n" .
                '<link rel="stylesheet" href="/w/load.php?debug=false&amp;lang=en&amp;modules=site.styles&amp;only=styles&amp;skin=fallback"/>',
            ],
            'default logged-in' => [
                'exemptStyleModules' => [ 'site' => [ 'site.styles' ], 'user' => [ 'user.styles' ] ],
                '<meta name="ResourceLoaderDynamicStyles" content=""/>' . "\n" .
                '<link rel="stylesheet" href="/w/load.php?debug=false&amp;lang=en&amp;modules=site.styles&amp;only=styles&amp;skin=fallback"/>' . "\n" .
                '<link rel="stylesheet" href="/w/load.php?debug=false&amp;lang=en&amp;modules=user.styles&amp;only=styles&amp;skin=fallback&amp;version=1ai9g6t"/>',
            ],
            'custom modules' => [
                'exemptStyleModules' => [
                    'site' => [ 'site.styles', 'example.site.a', 'example.site.b' ],
                    'user' => [ 'user.styles', 'example.user' ],
                ],
                '<meta name="ResourceLoaderDynamicStyles" content=""/>' . "\n" .
                '<link rel="stylesheet" href="/w/load.php?debug=false&amp;lang=en&amp;modules=example.site.a%2Cb&amp;only=styles&amp;skin=fallback"/>' . "\n" .
                '<link rel="stylesheet" href="/w/load.php?debug=false&amp;lang=en&amp;modules=site.styles&amp;only=styles&amp;skin=fallback"/>' . "\n" .
                '<link rel="stylesheet" href="/w/load.php?debug=false&amp;lang=en&amp;modules=example.user&amp;only=styles&amp;skin=fallback&amp;version=0a56zyi"/>' . "\n" .
                '<link rel="stylesheet" href="/w/load.php?debug=false&amp;lang=en&amp;modules=user.styles&amp;only=styles&amp;skin=fallback&amp;version=1ai9g6t"/>',
            ],
        ];
        // phpcs:enable
    }
 
    public function testTransformResourcePath( $baseDir, $basePath, $uploadDir = null,
        $uploadPath = null, $path = null, $expected = null
    ) {
        if ( $path === null ) {
            // Skip optional $uploadDir and $uploadPath
            $path = $uploadDir;
            $expected = $uploadPath;
            $uploadDir = "$baseDir/images";
            $uploadPath = "$basePath/images";
        }
        $this->setMwGlobals( 'IP', $baseDir );
        $conf = new HashConfig( [
            'ResourceBasePath' => $basePath,
            'UploadDirectory' => $uploadDir,
            'UploadPath' => $uploadPath,
        ] );
 
        // Some of these paths don't exist and will cause warnings
        Wikimedia\suppressWarnings();
        $actual = OutputPage::transformResourcePath( $conf, $path );
        Wikimedia\restoreWarnings();
 
        $this->assertEquals( $expected ?: $path, $actual );
    }
 
    public static function provideTransformFilePath() {
        $baseDir = dirname( __DIR__ ) . '/data/media';
        return [
            // File that matches basePath, and exists. Hash found and appended.
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                '/w/test.jpg',
                '/w/test.jpg?edcf2'
            ],
            // File that matches basePath, but not found on disk. Empty query.
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                '/w/unknown.png',
                '/w/unknown.png?'
            ],
            // File not matching basePath. Ignored.
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                '/files/test.jpg'
            ],
            // Empty string. Ignored.
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                '',
                ''
            ],
            // Similar path, but with domain component. Ignored.
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                '//example.org/w/test.jpg'
            ],
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                'https://example.org/w/test.jpg'
            ],
            // Unrelated path with domain component. Ignored.
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                'https://example.org/files/test.jpg'
            ],
            [
                'baseDir' => $baseDir, 'basePath' => '/w',
                '//example.org/files/test.jpg'
            ],
            // Unrelated path with domain, and empty base path (root mw install). Ignored.
            [
                'baseDir' => $baseDir, 'basePath' => '',
                'https://example.org/files/test.jpg'
            ],
            [
                'baseDir' => $baseDir, 'basePath' => '',
                // T155310
                '//example.org/files/test.jpg'
            ],
            // Check UploadPath before ResourceBasePath (T155146)
            [
                'baseDir' => dirname( $baseDir ), 'basePath' => '',
                'uploadDir' => $baseDir, 'uploadPath' => '/images',
                '/images/test.jpg',
                '/images/test.jpg?edcf2'
            ],
        ];
    }
 
    protected function assertTransformCssMediaCase( $args ) {
        $queryData = [];
        if ( isset( $args['printableQuery'] ) ) {
            $queryData['printable'] = $args['printableQuery'];
        }
 
        if ( isset( $args['handheldQuery'] ) ) {
            $queryData['handheld'] = $args['handheldQuery'];
        }
 
        $fauxRequest = new FauxRequest( $queryData, false );
        $this->setMwGlobals( [
            'wgRequest' => $fauxRequest,
        ] );
 
        $actualReturn = OutputPage::transformCssMedia( $args['media'] );
        $this->assertSame( $args['expectedReturn'], $actualReturn, $args['message'] );
    }
 
    public function testPrintRequests() {
        $this->assertTransformCssMediaCase( [
            'printableQuery' => '1',
            'media' => 'screen',
            'expectedReturn' => null,
            'message' => 'On printable request, screen returns null'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'printableQuery' => '1',
            'media' => self::SCREEN_MEDIA_QUERY,
            'expectedReturn' => null,
            'message' => 'On printable request, screen media query returns null'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'printableQuery' => '1',
            'media' => self::SCREEN_ONLY_MEDIA_QUERY,
            'expectedReturn' => null,
            'message' => 'On printable request, screen media query with only returns null'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'printableQuery' => '1',
            'media' => 'print',
            'expectedReturn' => '',
            'message' => 'On printable request, media print returns empty string'
        ] );
    }
 
    public function testScreenRequests() {
        $this->assertTransformCssMediaCase( [
            'media' => 'screen',
            'expectedReturn' => 'screen',
            'message' => 'On screen request, screen media type is preserved'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'media' => 'handheld',
            'expectedReturn' => 'handheld',
            'message' => 'On screen request, handheld media type is preserved'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'media' => self::SCREEN_MEDIA_QUERY,
            'expectedReturn' => self::SCREEN_MEDIA_QUERY,
            'message' => 'On screen request, screen media query is preserved.'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'media' => self::SCREEN_ONLY_MEDIA_QUERY,
            'expectedReturn' => self::SCREEN_ONLY_MEDIA_QUERY,
            'message' => 'On screen request, screen media query with only is preserved.'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'media' => 'print',
            'expectedReturn' => 'print',
            'message' => 'On screen request, print media type is preserved'
        ] );
    }
 
    public function testHandheld() {
        $this->assertTransformCssMediaCase( [
            'handheldQuery' => '1',
            'media' => 'handheld',
            'expectedReturn' => '',
            'message' => 'On request with handheld querystring and media is handheld, returns empty string'
        ] );
 
        $this->assertTransformCssMediaCase( [
            'handheldQuery' => '1',
            'media' => 'screen',
            'expectedReturn' => null,
            'message' => 'On request with handheld querystring and media is screen, returns null'
        ] );
    }
 
    public function testIsTOCEnabled() {
        $op = $this->newInstance();
        $this->assertFalse( $op->isTOCEnabled() );
 
        $pOut1 = $this->createParserOutputStub( 'getTOCHTML', false );
        $op->addParserOutputMetadata( $pOut1 );
        $this->assertFalse( $op->isTOCEnabled() );
 
        $pOut2 = $this->createParserOutputStub( 'getTOCHTML', true );
        $op->addParserOutput( $pOut2 );
        $this->assertTrue( $op->isTOCEnabled() );
 
        // The parser output doesn't disable the TOC after it was enabled
        $op->addParserOutputMetadata( $pOut1 );
        $this->assertTrue( $op->isTOCEnabled() );
    }
 
    public function testPreloadLinkHeaders( $config, $result ) {
        $this->setMwGlobals( $config );
        $ctx = $this->getMockBuilder( ResourceLoaderContext::class )
            ->disableOriginalConstructor()->getMock();
        $module = new ResourceLoaderSkinModule();
 
        $this->assertEquals( [ $result ], $module->getHeaders( $ctx ) );
    }
 
    public function providePreloadLinkHeaders() {
        return [
            [
                [
                    'wgResourceBasePath' => '/w',
                    'wgLogo' => '/img/default.png',
                    'wgLogoHD' => [
                        '1.5x' => '/img/one-point-five.png',
                        '2x' => '/img/two-x.png',
                    ],
                ],
                'Link: </img/default.png>;rel=preload;as=image;media=' .
                'not all and (min-resolution: 1.5dppx),' .
                '</img/one-point-five.png>;rel=preload;as=image;media=' .
                '(min-resolution: 1.5dppx) and (max-resolution: 1.999999dppx),' .
                '</img/two-x.png>;rel=preload;as=image;media=(min-resolution: 2dppx)'
            ],
            [
                [
                    'wgResourceBasePath' => '/w',
                    'wgLogo' => '/img/default.png',
                    'wgLogoHD' => false,
                ],
                'Link: </img/default.png>;rel=preload;as=image'
            ],
            [
                [
                    'wgResourceBasePath' => '/w',
                    'wgLogo' => '/img/default.png',
                    'wgLogoHD' => [
                        '2x' => '/img/two-x.png',
                    ],
                ],
                'Link: </img/default.png>;rel=preload;as=image;media=' .
                'not all and (min-resolution: 2dppx),' .
                '</img/two-x.png>;rel=preload;as=image;media=(min-resolution: 2dppx)'
            ],
            [
                [
                    'wgResourceBasePath' => '/w',
                    'wgLogo' => '/img/default.png',
                    'wgLogoHD' => [
                        'svg' => '/img/vector.svg',
                    ],
                ],
                'Link: </img/vector.svg>;rel=preload;as=image'
 
            ],
            [
                [
                    'wgResourceBasePath' => '/w',
                    'wgLogo' => '/w/test.jpg',
                    'wgLogoHD' => false,
                    'wgUploadPath' => '/w/images',
                    'IP' => dirname( __DIR__ ) . '/data/media',
                ],
                'Link: </w/test.jpg?edcf2>;rel=preload;as=image',
            ],
        ];
    }
 
    private function newInstance( $config = [], WebRequest $request = null, $options = [] ) {
        $context = new RequestContext();
 
        $context->setConfig( new MultiConfig( [
            new HashConfig( $config + [
                'AppleTouchIcon' => false,
                'DisableLangConversion' => true,
                'EnableCanonicalServerLink' => false,
                'Favicon' => false,
                'Feed' => false,
                'LanguageCode' => false,
                'ReferrerPolicy' => false,
                'RightsPage' => false,
                'RightsUrl' => false,
                'UniversalEditButton' => false,
            ] ),
            $context->getConfig()
        ] ) );
 
        if ( !in_array( 'notitle', (array)$options ) ) {
            $context->setTitle( Title::newFromText( 'My test page' ) );
        }
 
        if ( $request ) {
            $context->setRequest( $request );
        }
 
        return new OutputPage( $context );
    }
}
 
class NullMessageBlobStore extends MessageBlobStore {
    public function get( ResourceLoader $resourceLoader, $modules, $lang ) {
        return [];
    }
 
    public function updateModule( $name, ResourceLoaderModule $module, $lang ) {
    }
 
    public function updateMessage( $key ) {
    }
 
    public function clear() {
    }
}