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<?php
namespace MediaWiki\Tests\Structure;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Request\FauxRequest;
use MediaWiki\ResourceLoader\Context;
use MediaWiki\ResourceLoader\DerivativeContext;
use MediaWiki\ResourceLoader\Module;
use MediaWikiIntegrationTestCase;
use Wikimedia\DependencyStore\DependencyStore;
use Wikimedia\ObjectCache\HashBagOStuff;
use Wikimedia\Rdbms\IDatabase;
use Wikimedia\Rdbms\LBFactory;
/**
* Compare bundle sizes from each skin/extension bundlesize.config.json with ResourceLoader output.
*
* Extensions and skins can subclass this and override getTestCases with just their own bundlesize
* file. This allows one to run that test suite by its own, for faster CLI feedback.
*/
abstract class BundleSizeTestBase extends MediaWikiIntegrationTestCase {
protected function setUp(): void {
parent::setUp();
$db = $this->createMock( IDatabase::class );
$db->method( 'getSessionLagStatus' )->willReturn( [ 'lag' => 0, 'since' => 0 ] );
$lbFactory = $this->createMock( LBFactory::class );
$lbFactory->method( 'getReplicaDatabase' )->willReturn( $db );
$this->setService( 'DBLoadBalancerFactory', $lbFactory );
}
/**
* Adjustments for bundle size increases caused by core, to avoid breaking
* previously introduced extension tests.
*/
private const CORE_SIZE_ADJUSTMENTS = [
'mw.loader.impl' => 17
];
public function provideBundleSize() {
foreach ( json_decode( file_get_contents( $this->getBundleSizeConfig() ), true ) as $testCase ) {
yield $testCase['resourceModule'] => [ $testCase ];
}
}
private static function stringToFloat( string $maxSize ): float {
if ( str_contains( $maxSize, 'KB' ) || str_contains( $maxSize, 'kB' ) ) {
$maxSize = (float)str_replace( [ 'KB', 'kB', ' KB', ' kB' ], '', $maxSize );
$maxSize = $maxSize * 1024;
} elseif ( str_contains( $maxSize, 'B' ) ) {
$maxSize = (float)str_replace( [ ' B', 'B' ], '', $maxSize );
}
return $maxSize;
}
/**
* @dataProvider provideBundleSize
* @coversNothing
*/
public function testBundleSize( $testCase ) {
$maxSizeUncompressed = $testCase['maxSizeUncompressed'] ?? null;
$maxSize = $testCase['maxSize'] ?? null;
$projectName = $testCase['projectName'] ?? '';
$moduleName = $testCase['resourceModule'];
if ( $maxSize === null && $maxSizeUncompressed === null ) {
$this->markTestSkipped( "The module $moduleName has opted out of bundle size testing." );
return;
}
$this->assertFalse(
$maxSize !== null && $maxSizeUncompressed !== null,
'Only maxSize or maxSizeCompressed should be defined for module ' . $moduleName . '. Only defined maxSizeCompressed.'
);
if ( is_string( $maxSize ) ) {
$maxSize = self::stringToFloat( $maxSize );
}
if ( is_string( $maxSizeUncompressed ) ) {
$maxSizeUncompressed = self::stringToFloat( $maxSizeUncompressed );
}
$resourceLoader = MediaWikiServices::getInstance()->getResourceLoader();
$resourceLoader->setDependencyStore( new DependencyStore( new HashBagOStuff() ) );
$request = new FauxRequest(
[
'lang' => 'en',
'modules' => $moduleName,
'skin' => $this->getSkinName(),
]
);
$context = new Context( $resourceLoader, $request );
$module = $resourceLoader->getModule( $moduleName );
$contentContext = new DerivativeContext( $context );
$contentContext->setOnly(
$module->getType() === Module::LOAD_STYLES
? Module::TYPE_STYLES
: Module::TYPE_COMBINED
);
$content = $resourceLoader->makeModuleResponse( $context, [ $moduleName => $module ] );
$contentTransferSizeUncompressed = strlen( $content );
$contentTransferSize = strlen( gzencode( $content, 9 ) );
$contentTransferSize -= array_sum( self::CORE_SIZE_ADJUSTMENTS );
if ( $maxSize ) {
$message = $projectName ?
"$projectName: $moduleName is less than $maxSize" :
"$moduleName is less than $maxSize";
$this->assertLessThan( $maxSize, $contentTransferSize, $message );
}
if ( $maxSizeUncompressed ) {
$messageUncompressed = $projectName ?
"$projectName: $moduleName is less than $maxSize (uncompressed)" :
"$moduleName is less than $maxSizeUncompressed";
$this->assertLessThan( $maxSizeUncompressed, $contentTransferSizeUncompressed, $messageUncompressed );
}
}
/**
* @return string Path to bundlesize.config.json
*/
abstract public function getBundleSizeConfig(): string;
/**
* @return string Skin name
*/
public function getSkinName(): string {
return $this->getConfVar( MainConfigNames::DefaultSkin );
}
}