ResourcesTest: Detect missing files in url(...) expressions

[lhc/web/wiklou.git] / tests / phpunit / structure / ResourcesTest.php

<?php
/**
 * Sanity checks for making sure registered resources are sane.
 *
 * @file
 * @author Antoine Musso
 * @author Niklas Laxström
 * @author Santhosh Thottingal
 * @author Timo Tijhof
 * @copyright © 2012, Antoine Musso
 * @copyright © 2012, Niklas Laxström
 * @copyright © 2012, Santhosh Thottingal
 * @copyright © 2012, Timo Tijhof
 *
 */
class ResourcesTest extends MediaWikiTestCase {

        /**
         * @dataProvider provideResourceFiles
         */
        public function testFileExistence( $filename, $module, $resource ) {
                $this->assertFileExists( $filename,
                        "File '$resource' referenced by '$module' must exist."
                );
        }

        /**
         * @dataProvider provideMediaStylesheets
         */
        public function testStyleMedia( $moduleName, $media, $filename, $css ) {
                $cssText = CSSMin::minify( $css->cssText );

                $this->assertTrue(
                        strpos( $cssText, '@media' ) === false,
                        'Stylesheets should not both specify "media" and contain @media'
                );
        }

        public function testVersionHash() {
                $data = self::getAllModules();
                foreach ( $data['modules'] as $moduleName => $module ) {
                        $version = $module->getVersionHash( $data['context'] );
                        $this->assertEquals( 8, strlen( $version ), "$moduleName must use ResourceLoader::makeHash" );
                }
        }

        /**
         * Verify that nothing explicitly depends on the 'jquery' and 'mediawiki' modules.
         * They are always loaded, depending on them is unsupported and leads to unexpected behaviour.
         * TODO Modules can dynamically choose dependencies based on context. This method does not
         * test such dependencies. The same goes for testMissingDependencies() and
         * testUnsatisfiableDependencies().
         */
        public function testIllegalDependencies() {
                $data = self::getAllModules();
                $illegalDeps = array( 'jquery', 'mediawiki' );

                /** @var ResourceLoaderModule $module */
                foreach ( $data['modules'] as $moduleName => $module ) {
                        foreach ( $illegalDeps as $illegalDep ) {
                                $this->assertNotContains(
                                        $illegalDep,
                                        $module->getDependencies( $data['context'] ),
                                        "Module '$moduleName' must not depend on '$illegalDep'"
                                );
                        }
                }
        }

        /**
         * Verify that all modules specified as dependencies of other modules actually exist.
         */
        public function testMissingDependencies() {
                $data = self::getAllModules();
                $validDeps = array_keys( $data['modules'] );

                /** @var ResourceLoaderModule $module */
                foreach ( $data['modules'] as $moduleName => $module ) {
                        foreach ( $module->getDependencies( $data['context'] ) as $dep ) {
                                $this->assertContains(
                                        $dep,
                                        $validDeps,
                                        "The module '$dep' required by '$moduleName' must exist"
                                );
                        }
                }
        }

        /**
         * Verify that all dependencies of all modules are always satisfiable with the 'targets' defined
         * for the involved modules.
         *
         * Example: A depends on B. A has targets: mobile, desktop. B has targets: desktop. Therefore the
         * dependency is sometimes unsatisfiable: it's impossible to load module A on mobile.
         */
        public function testUnsatisfiableDependencies() {
                $data = self::getAllModules();
                $validDeps = array_keys( $data['modules'] );

                /** @var ResourceLoaderModule $module */
                foreach ( $data['modules'] as $moduleName => $module ) {
                        $moduleTargets = $module->getTargets();
                        foreach ( $module->getDependencies( $data['context'] ) as $dep ) {
                                if ( !isset( $data['modules'][$dep] ) ) {
                                        // Missing dependencies reported by testMissingDependencies
                                        continue;
                                }
                                $targets = $data['modules'][$dep]->getTargets();
                                foreach ( $moduleTargets as $moduleTarget ) {
                                        $this->assertContains(
                                                $moduleTarget,
                                                $targets,
                                                "The module '$moduleName' must not have target '$moduleTarget' "
                                                        . "because its dependency '$dep' does not have it"
                                        );
                                }
                        }
                }
        }

        /**
         * Get all registered modules from ResouceLoader.
         * @return array
         */
        protected static function getAllModules() {
                global $wgEnableJavaScriptTest;

                // Test existance of test suite files as well
                // (can't use setUp or setMwGlobals because providers are static)
                $org_wgEnableJavaScriptTest = $wgEnableJavaScriptTest;
                $wgEnableJavaScriptTest = true;

                // Initialize ResourceLoader
                $rl = new ResourceLoader();

                $modules = array();

                foreach ( $rl->getModuleNames() as $moduleName ) {
                        $modules[$moduleName] = $rl->getModule( $moduleName );
                }

                // Restore settings
                $wgEnableJavaScriptTest = $org_wgEnableJavaScriptTest;

                return array(
                        'modules' => $modules,
                        'resourceloader' => $rl,
                        'context' => new ResourceLoaderContext( $rl, new FauxRequest() )
                );
        }

        /**
         * Get all stylesheet files from modules that are an instance of
         * ResourceLoaderFileModule (or one of its subclasses).
         */
        public static function provideMediaStylesheets() {
                $data = self::getAllModules();
                $cases = array();

                foreach ( $data['modules'] as $moduleName => $module ) {
                        if ( !$module instanceof ResourceLoaderFileModule ) {
                                continue;
                        }

                        $reflectedModule = new ReflectionObject( $module );

                        $getStyleFiles = $reflectedModule->getMethod( 'getStyleFiles' );
                        $getStyleFiles->setAccessible( true );

                        $readStyleFile = $reflectedModule->getMethod( 'readStyleFile' );
                        $readStyleFile->setAccessible( true );

                        $styleFiles = $getStyleFiles->invoke( $module, $data['context'] );

                        $flip = $module->getFlip( $data['context'] );

                        foreach ( $styleFiles as $media => $files ) {
                                if ( $media && $media !== 'all' ) {
                                        foreach ( $files as $file ) {
                                                $cases[] = array(
                                                        $moduleName,
                                                        $media,
                                                        $file,
                                                        // XXX: Wrapped in an object to keep it out of PHPUnit output
                                                        (object)array( 'cssText' => $readStyleFile->invoke( $module, $file, $flip ) ),
                                                );
                                        }
                                }
                        }
                }

                return $cases;
        }

        /**
         * Get all resource files from modules that are an instance of
         * ResourceLoaderFileModule (or one of its subclasses).
         *
         * Since the raw data is stored in protected properties, we have to
         * overrride this through ReflectionObject methods.
         */
        public static function provideResourceFiles() {
                $data = self::getAllModules();
                $cases = array();

                // See also ResourceLoaderFileModule::__construct
                $filePathProps = array(
                        // Lists of file paths
                        'lists' => array(
                                'scripts',
                                'debugScripts',
                                'loaderScripts',
                                'styles',
                        ),

                        // Collated lists of file paths
                        'nested-lists' => array(
                                'languageScripts',
                                'skinScripts',
                                'skinStyles',
                        ),
                );

                foreach ( $data['modules'] as $moduleName => $module ) {
                        if ( !$module instanceof ResourceLoaderFileModule ) {
                                continue;
                        }

                        $reflectedModule = new ReflectionObject( $module );

                        $files = array();

                        foreach ( $filePathProps['lists'] as $propName ) {
                                $property = $reflectedModule->getProperty( $propName );
                                $property->setAccessible( true );
                                $list = $property->getValue( $module );
                                foreach ( $list as $key => $value ) {
                                        // 'scripts' are numeral arrays.
                                        // 'styles' can be numeral or associative.
                                        // In case of associative the key is the file path
                                        // and the value is the 'media' attribute.
                                        if ( is_int( $key ) ) {
                                                $files[] = $value;
                                        } else {
                                                $files[] = $key;
                                        }
                                }
                        }

                        foreach ( $filePathProps['nested-lists'] as $propName ) {
                                $property = $reflectedModule->getProperty( $propName );
                                $property->setAccessible( true );
                                $lists = $property->getValue( $module );
                                foreach ( $lists as $list ) {
                                        foreach ( $list as $key => $value ) {
                                                // We need the same filter as for 'lists',
                                                // due to 'skinStyles'.
                                                if ( is_int( $key ) ) {
                                                        $files[] = $value;
                                                } else {
                                                        $files[] = $key;
                                                }
                                        }
                                }
                        }

                        // Get method for resolving the paths to full paths
                        $method = $reflectedModule->getMethod( 'getLocalPath' );
                        $method->setAccessible( true );

                        // Populate cases
                        foreach ( $files as $file ) {
                                $cases[] = array(
                                        $method->invoke( $module, $file ),
                                        $moduleName,
                                        ( $file instanceof ResourceLoaderFilePath ? $file->getPath() : $file ),
                                );
                        }

                        // To populate missingLocalFileRefs. Not sure how sane this is inside this test...
                        $module->readStyleFiles(
                                $module->getStyleFiles( $data['context'] ),
                                $module->getFlip( $data['context'] ),
                                $data['context']
                        );

                        $property = $reflectedModule->getProperty( 'missingLocalFileRefs' );
                        $property->setAccessible( true );
                        $missingLocalFileRefs = $property->getValue( $module );

                        foreach ( $missingLocalFileRefs as $file ) {
                                $cases[] = array(
                                        $file,
                                        $moduleName,
                                        $file,
                                );
                        }
                }

                return $cases;
        }
}