init MultipleClassFileToPsr4ClassesRector

composer.json

@@ -50,7 +50,8 @@
             "Rector\\PhpParser\\": "packages/PhpParser/src",
             "Rector\\Doctrine\\": "packages/Doctrine/src",
             "Rector\\Utils\\": "packages/Utils/src",
-            "Rector\\YamlRector\\": "packages/YamlRector/src"
+            "Rector\\YamlRector\\": "packages/YamlRector/src",
+            "Rector\\FileSystemRector\\": "packages/FileSystemRector/src"
         }
     },
     "autoload-dev": {
@@ -67,12 +68,18 @@
             "Rector\\Utils\\Tests\\": "packages/Utils/tests",
             "Rector\\Twig\\Tests\\": "packages/Twig/tests",
             "Rector\\Doctrine\\Tests\\": "packages/Doctrine/tests",
-            "Rector\\YamlRector\\Tests\\": "packages/YamlRector/tests"
+            "Rector\\YamlRector\\Tests\\": "packages/YamlRector/tests",
+            "Rector\\FileSystemRector\\Tests\\": "packages/FileSystemRector/tests"
         },
         "classmap": [
             "packages",
             "tests/Issues",
             "tests/Rector"
+        ],
+        "files": [
+            "tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Source/exceptions.php",
+            "tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Source/nette-exceptions.php",
+            "tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Source/exception.php"
         ]
     },
     "scripts": {

ecs.yml

@@ -54,6 +54,7 @@ parameters:
         # tests files
         - '*tests/*/Wrong/*'
         - '*tests/*/Correct/*'
+        - '*tests/*/Expected/*'
 
     skip:
         Symplify\CodingStandard\Fixer\Php\ClassStringToClassConstantFixer:
@@ -99,5 +100,6 @@ parameters:
             # enforced by interface
             - '*Command.php'
             - '*NodeVisitor.php'
+            - '*CompilerPass.php'
             # array type check
             - 'src/RectorDefinition/RectorDefinition.php'

packages/FileSystemRector/config/config.yml

@@ -0,0 +1,2 @@
+imports:
+    - { resource: 'services.yml' }

packages/FileSystemRector/config/services.yml

@@ -0,0 +1,7 @@
+services:
+    _defaults:
+        public: true
+        autowire: true
+
+    Rector\FileSystemRector\:
+        resource: '../src'

packages/FileSystemRector/src/Contract/FileSystemRectorInterface.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace Rector\FileSystemRector\Contract;
+
+use Rector\Contract\Rector\RectorInterface;
+use Symfony\Component\Finder\SplFileInfo;
+
+interface FileSystemRectorInterface extends RectorInterface
+{
+    public function refactor(SplFileInfo $fileInfo): void;
+}

packages/FileSystemRector/src/DependencyInjection/FileSystemRectorCollectorCompilerPass.php

@@ -0,0 +1,33 @@
+<?php declare(strict_types=1);
+
+namespace Rector\FileSystemRector\DependencyInjection;
+
+use Rector\FileSystemRector\Contract\FileSystemRectorInterface;
+use Rector\FileSystemRector\FileSystemFileProcessor;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symplify\PackageBuilder\DependencyInjection\DefinitionCollector;
+use Symplify\PackageBuilder\DependencyInjection\DefinitionFinder;
+
+final class FileSystemRectorCollectorCompilerPass implements CompilerPassInterface
+{
+    /**
+     * @var DefinitionCollector
+     */
+    private $definitionCollector;
+
+    public function __construct()
+    {
+        $this->definitionCollector = (new DefinitionCollector(new DefinitionFinder()));
+    }
+
+    public function process(ContainerBuilder $containerBuilder): void
+    {
+        $this->definitionCollector->loadCollectorWithType(
+            $containerBuilder,
+            FileSystemFileProcessor::class,
+            FileSystemRectorInterface::class,
+            'addFileSystemRector'
+        );
+    }
+}

packages/FileSystemRector/src/FileSystemFileProcessor.php

@@ -0,0 +1,39 @@
+<?php declare(strict_types=1);
+
+namespace Rector\FileSystemRector;
+
+use Rector\FileSystemRector\Contract\FileSystemRectorInterface;
+use Symfony\Component\Finder\SplFileInfo;
+
+final class FileSystemFileProcessor
+{
+    /**
+     * @var FileSystemRectorInterface[]
+     */
+    private $fileSystemRectors = [];
+
+    public function addFileSystemRector(FileSystemRectorInterface $fileSystemRector): void
+    {
+        $this->fileSystemRectors[] = $fileSystemRector;
+    }
+
+    /**
+     * @return FileSystemRectorInterface[]
+     */
+    public function getFileSystemRectors(): array
+    {
+        return $this->fileSystemRectors;
+    }
+
+    public function processFileInfo(SplFileInfo $fileInfo): void
+    {
+        foreach ($this->fileSystemRectors as $fileSystemRector) {
+            $fileSystemRector->refactor($fileInfo);
+        }
+    }
+
+    public function getFileSystemRectorsCount(): int
+    {
+        return count($this->fileSystemRectors);
+    }
+}

packages/FileSystemRector/tests/AbstractFileSystemRectorTest.php

@@ -0,0 +1,36 @@
+<?php declare(strict_types=1);
+
+namespace Rector\FileSystemRector\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Psr\Container\ContainerInterface;
+use Rector\DependencyInjection\ContainerFactory;
+use Rector\FileSystemRector\FileSystemFileProcessor;
+use Symplify\PackageBuilder\FileSystem\SmartFileInfo;
+
+abstract class AbstractFileSystemRectorTest extends TestCase
+{
+    /**
+     * @var ContainerInterface
+     */
+    private $container;
+
+    /**
+     * @var FileSystemFileProcessor
+     */
+    private $fileSystemFileProcessor;
+
+    protected function setUp(): void
+    {
+        $this->container = (new ContainerFactory())->createWithConfigFiles([$this->provideConfig()]);
+
+        $this->fileSystemFileProcessor = $this->container->get(FileSystemFileProcessor::class);
+    }
+
+    protected function doTestFile(string $file): void
+    {
+        $this->fileSystemFileProcessor->processFileInfo(new SmartFileInfo($file));
+    }
+
+    abstract protected function provideConfig(): string;
+}

packages/YamlRector/tests/AbstractYamlRectorTest.php

@@ -7,7 +7,7 @@ use Psr\Container\ContainerInterface;
 use Rector\DependencyInjection\ContainerFactory;
 use Rector\FileSystem\FileGuard;
 use Rector\YamlRector\YamlFileProcessor;
-use Symfony\Component\Finder\SplFileInfo;
+use Symplify\PackageBuilder\FileSystem\SmartFileInfo;
 use function Safe\sprintf;
 
 abstract class AbstractYamlRectorTest extends TestCase
@@ -40,10 +40,9 @@ abstract class AbstractYamlRectorTest extends TestCase
 
     protected function doTestFileMatchesExpectedContent(string $file, string $reconstructedFile): void
     {
-        $this->fileGuard->ensureFileExists($file, static::class);
         $this->fileGuard->ensureFileExists($reconstructedFile, static::class);
 
-        $reconstructedFileContent = $this->yamlFileProcessor->processFileInfo(new SplFileInfo($file, '', ''));
+        $reconstructedFileContent = $this->yamlFileProcessor->processFileInfo(new SmartFileInfo($file));
 
         $this->assertStringEqualsFile(
             $reconstructedFile,

phpstan.neon

@@ -54,7 +54,6 @@ parameters:
         - '#Cannot call method getName\(\) on PHPStan\\Reflection\\ClassReflection\|null#' # 1
         - '#Parameter \#1 \$classReflection of method Rector\\NodeTypeResolver\\Reflection\\ClassReflectionTypesResolver::resolve\(\) expects PHPStan\\Reflection\\ClassReflection, PHPStan\\Reflection\\ClassReflection|null given#'
         - '#Cannot call method getAttribute\(\) on PhpParser\\Node\\Name\|null#'
-        - '#Cannot call method getBasename\(\) on Symfony\\Component\\Finder\\SplFileInfo\|null#'
         - '#Cannot call method getText\(\) on PhpParser\\Comment\\Doc\|null#'
 
         # Error php-parser token

src/Console/Command/ProcessCommand.php

@@ -13,6 +13,7 @@ use Rector\Console\Output\ProcessCommandReporter;
 use Rector\Console\Shell;
 use Rector\ConsoleDiffer\DifferAndFormatter;
 use Rector\FileSystem\FilesFinder;
+use Rector\FileSystemRector\FileSystemFileProcessor;
 use Rector\Guard\RectorGuard;
 use Rector\Reporting\FileDiff;
 use Rector\YamlRector\YamlFileProcessor;
@@ -90,6 +91,11 @@ final class ProcessCommand extends Command
      */
     private $errors = [];
 
+    /**
+     * @var FileSystemFileProcessor
+     */
+    private $fileSystemFileProcessor;
+
     public function __construct(
         FileProcessor $fileProcessor,
         ConsoleStyle $consoleStyle,
@@ -99,7 +105,8 @@ final class ProcessCommand extends Command
         DifferAndFormatter $differAndFormatter,
         AdditionalAutoloader $additionalAutoloader,
         YamlFileProcessor $yamlFileProcessor,
-        RectorGuard $rectorGuard
+        RectorGuard $rectorGuard,
+        FileSystemFileProcessor $fileSystemFileProcessor
     ) {
         parent::__construct();
 
@@ -112,6 +119,7 @@ final class ProcessCommand extends Command
         $this->additionalAutoloader = $additionalAutoloader;
         $this->yamlFileProcessor = $yamlFileProcessor;
         $this->rectorGuard = $rectorGuard;
+        $this->fileSystemFileProcessor = $fileSystemFileProcessor;
     }
 
     protected function configure(): void
@@ -218,6 +226,33 @@ final class ProcessCommand extends Command
         $this->consoleStyle->newLine(2);
     }
 
+    private function processFileInfo(SplFileInfo $fileInfo, bool $shouldHideAutoloadErrors): void
+    {
+        try {
+            if ($fileInfo->getExtension() === 'php') {
+                $this->processFile($fileInfo);
+            } elseif (in_array($fileInfo->getExtension(), ['yml', 'yaml'], true)) {
+                $this->processYamlFile($fileInfo);
+            }
+
+            $this->processFileSystemFile($fileInfo);
+        } catch (AnalysedCodeException $analysedCodeException) {
+            if ($shouldHideAutoloadErrors) {
+                return;
+            }
+
+            $message = sprintf(
+                'Analyze error: "%s". Try to include your files in "parameters > autoload_paths".%sSee https://github.com/rectorphp/rector#extra-autoloading',
+                $analysedCodeException->getMessage(),
+                PHP_EOL
+            );
+
+            $this->errors[] = new Error($fileInfo, $message, null);
+        } catch (Throwable $throwable) {
+            $this->errors[] = new Error($fileInfo, $throwable->getMessage(), $throwable->getCode());
+        }
+    }
+
     private function processFile(SplFileInfo $fileInfo): void
     {
         $oldContent = $fileInfo->getContents();
@@ -260,28 +295,8 @@ final class ProcessCommand extends Command
         }
     }
 
-    private function processFileInfo(SplFileInfo $fileInfo, bool $shouldHideAutoloadErrors): void
+    private function processFileSystemFile(SplFileInfo $fileInfo): void
     {
-        try {
-            if ($fileInfo->getExtension() === 'php') {
-                $this->processFile($fileInfo);
-            } elseif (in_array($fileInfo->getExtension(), ['yml', 'yaml'], true)) {
-                $this->processYamlFile($fileInfo);
-            }
-        } catch (AnalysedCodeException $analysedCodeException) {
-            if ($shouldHideAutoloadErrors) {
-                return;
-            }
-
-            $message = sprintf(
-                'Analyze error: %s Try to include your files in "parameters > autoload_paths".%sSee https://github.com/rectorphp/rector#extra-autoloading',
-                $analysedCodeException->getMessage(),
-                PHP_EOL
-            );
-
-            $this->errors[] = new Error($fileInfo, $message, null);
-        } catch (Throwable $throwable) {
-            $this->errors[] = new Error($fileInfo, $throwable->getMessage(), $throwable->getCode());
-        }
+        $this->fileSystemFileProcessor->processFileInfo($fileInfo);
     }
 }

src/DependencyInjection/CompilerPass/CollectorConfigCompilerPass.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace Rector\DependencyInjection\CompilerPass;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+final class CollectorConfigCompilerPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $containerBuilder): void
+    {
+        // @todo
+        // configure collector via params
+    }
+}

src/DependencyInjection/RectorKernel.php

@@ -5,6 +5,8 @@ namespace Rector\DependencyInjection;
 use Rector\Contract\Rector\PhpRectorInterface;
 use Rector\DependencyInjection\CompilerPass\AutowireInterfacesCompilerPass;
 use Rector\DependencyInjection\CompilerPass\CollectorCompilerPass;
+use Rector\FileSystemRector\Contract\FileSystemRectorInterface;
+use Rector\FileSystemRector\DependencyInjection\FileSystemRectorCollectorCompilerPass;
 use Rector\YamlRector\Contract\YamlRectorInterface;
 use Rector\YamlRector\DependencyInjection\YamlRectorCollectorCompilerPass;
 use Symfony\Component\Config\Loader\DelegatingLoader;
@@ -69,16 +71,19 @@ final class RectorKernel extends Kernel
 
     protected function build(ContainerBuilder $containerBuilder): void
     {
+        // collect all Rector services to its runners
         $containerBuilder->addCompilerPass(new CollectorCompilerPass());
         $containerBuilder->addCompilerPass(new YamlRectorCollectorCompilerPass());
+        $containerBuilder->addCompilerPass(new FileSystemRectorCollectorCompilerPass());
 
         // for defaults
         $containerBuilder->addCompilerPass(new AutowireSinglyImplementedCompilerPass());
 
-        // autowire
+        // autowire Rectors by default (mainly for 3rd party code)
         $containerBuilder->addCompilerPass(new AutowireInterfacesCompilerPass([
             PhpRectorInterface::class,
             YamlRectorInterface::class,
+            FileSystemRectorInterface::class,
         ]));
 
         $containerBuilder->addCompilerPass(new AutoBindParametersCompilerPass());

src/Rector/AbstractRector.php

@@ -36,15 +36,6 @@ abstract class AbstractRector extends NodeVisitorAbstract implements PhpRectorIn
         $this->expressionAdder = $expressionAdder;
     }
 
-    /**
-     * @param Node[] $nodes
-     * @return Node[]
-     */
-    final public function beforeTraverse(array $nodes): array
-    {
-        return $nodes;
-    }
-
     /**
      * @return int|Node|null
      */

src/Rector/Psr4/MultipleClassFileToPsr4ClassesRector.php

@@ -0,0 +1,225 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Rector\Psr4;
+
+use PhpParser\Lexer;
+use PhpParser\Node;
+use PhpParser\Node\Stmt\Class_;
+use PhpParser\Node\Stmt\Namespace_;
+use Rector\FileSystemRector\Contract\FileSystemRectorInterface;
+use Rector\NodeTypeResolver\NodeScopeAndMetadataDecorator;
+use Rector\Parser\Parser;
+use Rector\Printer\FormatPerservingPrinter;
+use Rector\RectorDefinition\CodeSample;
+use Rector\RectorDefinition\RectorDefinition;
+use Rector\Utils\BetterNodeFinder;
+use Symfony\Component\Filesystem\Filesystem;
+use Symfony\Component\Finder\SplFileInfo;
+
+final class MultipleClassFileToPsr4ClassesRector implements FileSystemRectorInterface
+{
+    /**
+     * @var BetterNodeFinder
+     */
+    private $betterNodeFinder;
+
+    /**
+     * @var Filesystem
+     */
+    private $filesystem;
+
+    /**
+     * @var Parser
+     */
+    private $parser;
+
+    /**
+     * @var Lexer
+     */
+    private $lexer;
+
+    /**
+     * @var FormatPerservingPrinter
+     */
+    private $formatPerservingPrinter;
+
+    /**
+     * @var NodeScopeAndMetadataDecorator
+     */
+    private $nodeScopeAndMetadataDecorator;
+
+    public function __construct(
+        BetterNodeFinder $betterNodeFinder,
+        Filesystem $filesystem,
+        Parser $parser,
+        Lexer $lexer,
+        FormatPerservingPrinter $formatPerservingPrinter,
+        NodeScopeAndMetadataDecorator $nodeScopeAndMetadataDecorator
+    ) {
+        $this->betterNodeFinder = $betterNodeFinder;
+        $this->filesystem = $filesystem;
+        $this->parser = $parser;
+        $this->lexer = $lexer;
+        $this->formatPerservingPrinter = $formatPerservingPrinter;
+        $this->nodeScopeAndMetadataDecorator = $nodeScopeAndMetadataDecorator;
+    }
+
+    public function getDefinition(): RectorDefinition
+    {
+        return new RectorDefinition(
+            'Turns namespaced classes in one file to standalone PSR-4 classes.',
+            [
+                new CodeSample(
+                    <<<'CODE_SAMPLE'
+namespace App\Exceptions;
+
+use Exception;
+
+final class FirstException extends Exception 
+{
+    
+}
+
+final class SecondException extends Exception
+{
+    
+}
+CODE_SAMPLE
+                    ,
+                    <<<'CODE_SAMPLE'
+// new file: "app/Exceptions/FirstException.php"
+namespace App\Exceptions;
+
+use Exception;
+
+final class FirstException extends Exception 
+{
+    
+}
+
+// new file: "app/Exceptions/SecondException.php"
+namespace App\Exceptions;
+
+use Exception;
+
+final class SecondException extends Exception
+{
+    
+}
+CODE_SAMPLE
+                ),
+            ]
+        );
+    }
+
+    public function refactor(SplFileInfo $fileInfo): void
+    {
+        $oldStmts = $this->parser->parseFile($fileInfo->getRealPath());
+
+        // needed for format preserving
+        $newStmts = $this->nodeScopeAndMetadataDecorator->decorateNodesFromFile($oldStmts, $fileInfo->getRealPath());
+
+        /** @var Namespace_[] $namespaceNodes */
+        $namespaceNodes = $this->betterNodeFinder->findInstanceOf($newStmts, Namespace_::class);
+
+        if ($this->shouldSkip($fileInfo, $newStmts, $namespaceNodes)) {
+            return;
+        }
+
+        foreach ($namespaceNodes as $namespaceNode) {
+            $newStmtsSet = $this->removeAllOtherNamespaces($newStmts, $namespaceNode);
+
+            foreach ($newStmtsSet as $newStmt) {
+                if (! $newStmt instanceof Namespace_) {
+                    continue;
+                }
+
+                /** @var Class_[] $namespacedClassNodes */
+                $namespacedClassNodes = $this->betterNodeFinder->findInstanceOf($newStmt->stmts, Class_::class);
+
+                foreach ($namespacedClassNodes as $classNode) {
+                    $this->removeAllClassesFromNamespaceNode($newStmt);
+                    $newStmt->stmts[] = $classNode;
+
+                    // reindex from 0, for the printer
+                    $newStmt->stmts = array_values($newStmt->stmts);
+
+                    $fileDestination = $this->createClassFileDestination($classNode, $fileInfo);
+
+                    $fileContent = $this->formatPerservingPrinter->printToString(
+                        $newStmtsSet,
+                        $oldStmts,
+                        $this->lexer->getTokens()
+                    );
+
+                    $this->filesystem->dumpFile($fileDestination, $fileContent);
+                }
+            }
+        }
+    }
+
+    private function createClassFileDestination(Class_ $classNode, SplFileInfo $fileInfo): string
+    {
+        $currentDirectory = dirname($fileInfo->getRealPath());
+
+        return $currentDirectory . DIRECTORY_SEPARATOR . (string) $classNode->name . '.php';
+    }
+
+    private function removeAllClassesFromNamespaceNode(Namespace_ $namespaceNode): void
+    {
+        foreach ($namespaceNode->stmts as $key => $namespaceStatement) {
+            if ($namespaceStatement instanceof Class_) {
+                unset($namespaceNode->stmts[$key]);
+            }
+        }
+    }
+
+    /**
+     * @param Node[] $nodes
+     * @return Node[]
+     */
+    private function removeAllOtherNamespaces(array $nodes, Namespace_ $namespaceNode): array
+    {
+        foreach ($nodes as $key => $stmt) {
+            if ($stmt instanceof Namespace_ && $stmt !== $namespaceNode) {
+                unset($nodes[$key]);
+            }
+        }
+
+        // reindex from 0, for the printer
+        return array_values($nodes);
+    }
+
+    /**
+     * @param Node[] $nodes
+     * @param Namespace_[] $namespaceNodes
+     */
+    private function shouldSkip(SplFileInfo $fileInfo, array $nodes, array $namespaceNodes): bool
+    {
+        // process only namespaced file
+        if (! $namespaceNodes) {
+            return true;
+        }
+
+        /** @var Class_[] $classNodes */
+        $classNodes = $this->betterNodeFinder->findInstanceOf($nodes, Class_::class);
+
+        $nonAnonymousClassNodes = array_filter($classNodes, function (Class_ $classNode) {
+            return $classNode->name;
+        });
+
+        // only process file with multiple classes || class with non PSR-4 format
+        if (! $nonAnonymousClassNodes) {
+            return true;
+        }
+
+        if (count($nonAnonymousClassNodes) === 1) {
+            $nonAnonymousClassNode = $nonAnonymousClassNodes[0];
+            if ((string) $nonAnonymousClassNode->name === $fileInfo->getFilename()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}

src/Testing/PHPUnit/AbstractRectorTestCase.php

@@ -7,7 +7,7 @@ use Psr\Container\ContainerInterface;
 use Rector\Application\FileProcessor;
 use Rector\DependencyInjection\ContainerFactory;
 use Rector\FileSystem\FileGuard;
-use Symfony\Component\Finder\SplFileInfo;
+use Symplify\PackageBuilder\FileSystem\SmartFileInfo;
 use Symplify\PackageBuilder\Parameter\ParameterProvider;
 use function Safe\sprintf;
 
@@ -64,13 +64,11 @@ abstract class AbstractRectorTestCase extends TestCase
 
     protected function doTestFileMatchesExpectedContent(string $file, string $reconstructedFile): void
     {
-        $this->fileGuard->ensureFileExists($file, static::class);
         $this->fileGuard->ensureFileExists($reconstructedFile, static::class);
 
         $this->parameterProvider->changeParameter('source', [$file]);
 
-        $splFileInfo = new SplFileInfo($file, '', '');
-        $reconstructedFileContent = $this->fileProcessor->processFileToString($splFileInfo);
+        $reconstructedFileContent = $this->fileProcessor->processFileToString(new SmartFileInfo($file));
 
         $this->assertStringEqualsFile(
             $reconstructedFile,

src/config/external-services.yml

@@ -17,6 +17,8 @@ services:
     PhpParser\ConstExprEvaluator:
         factory: ['@Rector\NodeValueResolver\ConstExprEvaluatorFactory', 'create']
 
+    Symfony\Component\Filesystem\Filesystem: ~
+
     # Symfony\Console
     Symfony\Component\Console\Style\SymfonyStyle: ~
 

tests/FileSystem/FilesFinder/FilesFinderTest.php

@@ -5,6 +5,7 @@ namespace Rector\Tests\FileSystem\FilesFinder;
 use Iterator;
 use Rector\FileSystem\FilesFinder;
 use Rector\Tests\AbstractContainerAwareTestCase;
+use Symfony\Component\Finder\SplFileInfo;
 
 final class FilesFinderTest extends AbstractContainerAwareTestCase
 {
@@ -27,6 +28,7 @@ final class FilesFinderTest extends AbstractContainerAwareTestCase
         $foundFiles = $this->filesFinder->findInDirectoriesAndFiles([__DIR__ . '/FilesFinderSource'], $suffixes);
         $this->assertCount($count, $foundFiles);
 
+        /** @var SplFileInfo $foundFile */
         $foundFile = array_pop($foundFiles);
         $this->assertSame($fileName, $foundFile->getBasename());
     }

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Expected/ArgumentOutOfRangeException.php

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace NettePostfixedToUniqueAutoload;
+
+use InvalidArgumentException;
+
+/**
+ * The exception that is thrown when the value of an argument is
+ * outside the allowable range of values as defined by the invoked method.
+ */
+class ArgumentOutOfRangeException extends InvalidArgumentException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Expected/FirstException.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Tests\Rector\Psr4\MultipleClassFileToPsr4ClassesRector\Source;
+
+final class FirstException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Expected/InvalidStateException.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace NettePostfixedToUniqueAutoload;
+
+use InvalidArgumentException;
+
+
+/**
+ * The exception that is thrown when a method call is invalid for the object's
+ * current state, method has been invoked at an illegal or inappropriate time.
+ */
+class InvalidStateException extends \RuntimeException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Expected/JustOneException.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Tests\Rector\Psr4\MultipleClassFileToPsr4ClassesRector\Source;
+
+final class JustOneException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Expected/RegexpException.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+
+namespace NettePostfixedToUniqueAutoload\Utils;
+
+/**
+ * The exception that indicates error of the last Regexp execution.
+ */
+class RegexpException extends \Exception
+{
+    public const MESSAGES = [
+        PREG_INTERNAL_ERROR => 'Internal error',
+        PREG_BACKTRACK_LIMIT_ERROR => 'Backtrack limit was exhausted',
+        PREG_RECURSION_LIMIT_ERROR => 'Recursion limit was exhausted',
+        PREG_BAD_UTF8_ERROR => 'Malformed UTF-8 data',
+        PREG_BAD_UTF8_OFFSET_ERROR => 'Offset didn\'t correspond to the begin of a valid UTF-8 code point',
+        6 => 'Failed due to limited JIT stack space', // PREG_JIT_STACKLIMIT_ERROR
+    ];
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Expected/SecondException.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Tests\Rector\Psr4\MultipleClassFileToPsr4ClassesRector\Source;
+
+final class SecondException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Expected/UnknownImageFileException.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+
+namespace NettePostfixedToUniqueAutoload\Utils;
+
+
+/**
+ * The exception that indicates invalid image file.
+ */
+class UnknownImageFileException extends RegexpException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/MultipleClassFileToPsr4ClassesRectorTest.php

@@ -0,0 +1,82 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Tests\Rector\Psr4\MultipleClassFileToPsr4ClassesRector;
+
+use Iterator;
+use Rector\FileSystemRector\Tests\AbstractFileSystemRectorTest;
+use Symfony\Component\Filesystem\Filesystem;
+use Symplify\PackageBuilder\FileSystem\SmartFileInfo;
+
+/**
+ * @see \Rector\Rector\Psr4\MultipleClassFileToPsr4ClassesRector
+ */
+final class MultipleClassFileToPsr4ClassesRectorTest extends AbstractFileSystemRectorTest
+{
+    protected function tearDown(): void
+    {
+        if (! $this->getProvidedData()) {
+            return;
+        }
+
+        // cleanup filesystem
+        $generatedFiles = array_keys($this->getProvidedData()[1]);
+        (new Filesystem())->remove($generatedFiles);
+    }
+
+    /**
+     * @param string[] $expectedExceptions
+     * @dataProvider provideExceptionsData
+     */
+    public function test(string $file, array $expectedExceptions): void
+    {
+        $this->doTestFile($file);
+
+        foreach ($expectedExceptions as $expectedExceptionLocation => $expectedFormat) {
+            $this->assertFileExists($expectedExceptionLocation);
+            $this->assertFileEquals($expectedFormat, $expectedExceptionLocation);
+        }
+    }
+
+    public function provideExceptionsData(): Iterator
+    {
+        yield [
+            __DIR__ . '/Source/exceptions.php',
+            [
+                __DIR__ . '/Source/FirstException.php' => __DIR__ . '/Expected/FirstException.php',
+                __DIR__ . '/Source/SecondException.php' => __DIR__ . '/Expected/SecondException.php',
+            ],
+        ];
+
+        // source: https://github.com/nette/utils/blob/798f8c1626a8e0e23116d90e588532725cce7d0e/src/Utils/exceptions.php
+        yield [
+            __DIR__ . '/Source/nette-exceptions.php',
+            [
+                __DIR__ . '/Source/ArgumentOutOfRangeException.php' => __DIR__ . '/Expected/ArgumentOutOfRangeException.php',
+                __DIR__ . '/Source/InvalidStateException.php' => __DIR__ . '/Expected/InvalidStateException.php',
+                __DIR__ . '/Source/RegexpException.php' => __DIR__ . '/Expected/RegexpException.php',
+                __DIR__ . '/Source/UnknownImageFileException.php' => __DIR__ . '/Expected/UnknownImageFileException.php',
+            ],
+        ];
+
+        // non PSR-4 file with one class
+        yield [
+            __DIR__ . '/Source/exception.php',
+            [
+                __DIR__ . '/Source/JustOneException.php' => __DIR__ . '/Expected/JustOneException.php',
+            ],
+        ];
+    }
+
+    public function testSkip(): void
+    {
+        $originalFileContent = (new SmartFileInfo(__DIR__ . '/Source/ReadyException.php'))->getContents();
+
+        $this->doTestFile(__DIR__ . '/Source/ReadyException.php');
+        $this->assertStringEqualsFile(__DIR__ . '/Source/ReadyException.php', $originalFileContent);
+    }
+
+    protected function provideConfig(): string
+    {
+        return __DIR__ . '/config.yml';
+    }
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Source/ReadyException.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Tests\Rector\Psr4\MultipleClassFileToPsr4ClassesRector\Source;
+
+final class ReadyException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Source/exception.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Tests\Rector\Psr4\MultipleClassFileToPsr4ClassesRector\Source;
+
+final class JustOneException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Source/exceptions.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Tests\Rector\Psr4\MultipleClassFileToPsr4ClassesRector\Source;
+
+final class FirstException
+{
+}
+
+final class SecondException
+{
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/Source/nette-exceptions.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace NettePostfixedToUniqueAutoload;
+
+use InvalidArgumentException;
+
+/**
+ * The exception that is thrown when the value of an argument is
+ * outside the allowable range of values as defined by the invoked method.
+ */
+class ArgumentOutOfRangeException extends InvalidArgumentException
+{
+}
+
+
+/**
+ * The exception that is thrown when a method call is invalid for the object's
+ * current state, method has been invoked at an illegal or inappropriate time.
+ */
+class InvalidStateException extends \RuntimeException
+{
+}
+
+
+namespace NettePostfixedToUniqueAutoload\Utils;
+
+
+/**
+ * The exception that indicates invalid image file.
+ */
+class UnknownImageFileException extends RegexpException
+{
+}
+
+/**
+ * The exception that indicates error of the last Regexp execution.
+ */
+class RegexpException extends \Exception
+{
+    public const MESSAGES = [
+        PREG_INTERNAL_ERROR => 'Internal error',
+        PREG_BACKTRACK_LIMIT_ERROR => 'Backtrack limit was exhausted',
+        PREG_RECURSION_LIMIT_ERROR => 'Recursion limit was exhausted',
+        PREG_BAD_UTF8_ERROR => 'Malformed UTF-8 data',
+        PREG_BAD_UTF8_OFFSET_ERROR => 'Offset didn\'t correspond to the begin of a valid UTF-8 code point',
+        6 => 'Failed due to limited JIT stack space', // PREG_JIT_STACKLIMIT_ERROR
+    ];
+}

tests/Rector/Psr4/MultipleClassFileToPsr4ClassesRector/config.yml

@@ -0,0 +1,2 @@
+services:
+    Rector\Rector\Psr4\MultipleClassFileToPsr4ClassesRector: ~