AutoLoaderStructureTest.php

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<?php
 
class AutoLoaderStructureTest extends MediaWikiTestCase {
    public function testAutoLoadConfig() {
        $results = self::checkAutoLoadConf();
 
        $this->assertEquals(
            $results['expected'],
            $results['actual']
        );
    }
 
    public function providePSR4Completeness() {
        foreach ( AutoLoader::$psr4Namespaces as $prefix => $dir ) {
            foreach ( $this->recurseFiles( $dir ) as $file ) {
                yield [ $prefix, $dir, $file ];
            }
        }
    }
 
    private function recurseFiles( $dir ) {
        return ( new File_Iterator_Facade() )->getFilesAsArray( $dir, [ '.php' ] );
    }
 
    public function testPSR4Completeness( $prefix, $dir, $file ) {
        global $wgAutoloadLocalClasses, $wgAutoloadClasses;
        $contents = file_get_contents( $file );
        list( $classesInFile, $aliasesInFile ) = self::parseFile( $contents );
        $classes = array_keys( $classesInFile );
        if ( $classes ) {
            $this->assertCount(
                1,
                $classes,
                "Only one class per file in PSR-4 autoloaded classes ($file)"
            );
 
            // Check that the expected class name (based on the filename) is the
            // same as the one we found.
            // Strip directory prefix from front of filename, and .php extension
            $abbrFileName = substr( substr( $file, strlen( $dir ) ), 0, -4 );
            $expectedClassName = $prefix . str_replace( '/', '\\', $abbrFileName );
 
            $this->assertSame(
                $expectedClassName,
                $classes[0],
                "Class not autoloaded properly"
            );
 
        } else {
            // Dummy assertion so this test isn't marked in risky
            // if the file has no classes nor aliases in it
            $this->assertCount( 0, $classes );
        }
 
        if ( $aliasesInFile ) {
            $otherClasses = $wgAutoloadLocalClasses + $wgAutoloadClasses;
            foreach ( $aliasesInFile as $alias => $class ) {
                $this->assertArrayHasKey( $alias, $otherClasses,
                    'Alias must be in the classmap autoloader'
                );
            }
        }
    }
 
    private static function parseFile( $contents ) {
        // We could use token_get_all() here, but this is faster
        // Note: Keep in sync with ClassCollector
        $matches = [];
        preg_match_all( '/
                ^ [\t ]* (?:
                    (?:final\s+)? (?:abstract\s+)? (?:class|interface|trait) \s+
                    (?P<class> \w+)
                |
                    class_alias \s* \‍( \s*
                        ([\'"]) (?P<original> [^\'"]+) \g{-2} \s* , \s*
                        ([\'"]) (?P<alias> [^\'"]+ ) \g{-2} \s*
                    \‍) \s* ;
                |
                    class_alias \s* \‍( \s*
                        (?P<originalStatic> [\w\\\\]+)::class \s* , \s*
                        ([\'"]) (?P<aliasString> [^\'"]+ ) \g{-2} \s*
                    \‍) \s* ;
                )
            /imx', $contents, $matches, PREG_SET_ORDER );
 
        $namespaceMatch = [];
        preg_match( '/
                ^ [\t ]*
                    namespace \s+
                        (\w+(\\\\\w+)*)
                    \s* ;
            /imx', $contents, $namespaceMatch );
        $fileNamespace = $namespaceMatch ? $namespaceMatch[1] . '\\' : '';
 
        $classesInFile = [];
        $aliasesInFile = [];
 
        foreach ( $matches as $match ) {
            if ( !empty( $match['class'] ) ) {
                // 'class Foo {}'
                $class = $fileNamespace . $match['class'];
                $classesInFile[$class] = true;
            } elseif ( !empty( $match['original'] ) ) {
                // 'class_alias( "Foo", "Bar" );'
                $aliasesInFile[$match['alias']] = $match['original'];
            } else {
                // 'class_alias( Foo::class, "Bar" );'
                $aliasesInFile[$match['aliasString']] = $fileNamespace . $match['originalStatic'];
            }
        }
 
        return [ $classesInFile, $aliasesInFile ];
    }
 
    protected static function checkAutoLoadConf() {
        global $wgAutoloadLocalClasses, $wgAutoloadClasses, $IP;
 
        // wgAutoloadLocalClasses has precedence, just like in includes/AutoLoader.php
        $expected = $wgAutoloadLocalClasses + $wgAutoloadClasses;
        $actual = [];
 
        $psr4Namespaces = [];
        foreach ( AutoLoader::getAutoloadNamespaces() as $ns => $path ) {
            $psr4Namespaces[rtrim( $ns, '\\' ) . '\\'] = rtrim( $path, '/' );
        }
 
        foreach ( $expected as $class => $file ) {
            // Only prefix $IP if it doesn't have it already.
            // Generally local classes don't have it, and those from extensions and test suites do.
            if ( substr( $file, 0, 1 ) != '/' && substr( $file, 1, 1 ) != ':' ) {
                $filePath = "$IP/$file";
            } else {
                $filePath = $file;
            }
 
            if ( !file_exists( $filePath ) ) {
                $actual[$class] = "[file '$filePath' does not exist]";
                continue;
            }
 
            Wikimedia\suppressWarnings();
            $contents = file_get_contents( $filePath );
            Wikimedia\restoreWarnings();
 
            if ( $contents === false ) {
                $actual[$class] = "[couldn't read file '$filePath']";
                continue;
            }
 
            list( $classesInFile, $aliasesInFile ) = self::parseFile( $contents );
 
            foreach ( $classesInFile as $className => $ignore ) {
                // Skip if it's a PSR4 class
                $parts = explode( '\\', $className );
                for ( $i = count( $parts ) - 1; $i > 0; $i-- ) {
                    $ns = implode( '\\', array_slice( $parts, 0, $i ) ) . '\\';
                    if ( isset( $psr4Namespaces[$ns] ) ) {
                        $expectedPath = $psr4Namespaces[$ns] . '/'
                            . implode( '/', array_slice( $parts, $i ) )
                            . '.php';
                        if ( $filePath === $expectedPath ) {
                            continue 2;
                        }
                    }
                }
 
                // Nope, add it.
                $actual[$className] = $file;
            }
 
            // Only accept aliases for classes in the same file, because for correct
            // behavior, all aliases for a class must be set up when the class is loaded
            // (see <https://bugs.php.net/bug.php?id=61422>).
            foreach ( $aliasesInFile as $alias => $class ) {
                if ( isset( $classesInFile[$class] ) ) {
                    $actual[$alias] = $file;
                } else {
                    $actual[$alias] = "[original class not in $file]";
                }
            }
        }
 
        return [
            'expected' => $expected,
            'actual' => $actual,
        ];
    }
 
    public function testAutoloadOrder() {
        $path = realpath( __DIR__ . '/../../..' );
        $oldAutoload = file_get_contents( $path . '/autoload.php' );
        $generator = new AutoloadGenerator( $path, 'local' );
        $generator->setPsr4Namespaces( AutoLoader::getAutoloadNamespaces() );
        $generator->initMediaWikiDefault();
        $newAutoload = $generator->getAutoload( 'maintenance/generateLocalAutoload.php' );
 
        $this->assertEquals( $oldAutoload, $newAutoload, 'autoload.php does not match' .
            ' output of generateLocalAutoload.php script.' );
    }
}