FilesystemTest.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Filesystem\Tests;

use Symfony\Component\Filesystem\Exception\InvalidArgumentException;
use Symfony\Component\Filesystem\Exception\IOException;
use Symfony\Component\Filesystem\Path;

/**
 * Test class for Filesystem.
 */
class FilesystemTest extends FilesystemTestCase
{
    public function testCopyCreatesNewFile()
    {
        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');

        $this->filesystem->copy($sourceFilePath, $targetFilePath);

        $this->assertFileExists($targetFilePath);
        $this->assertStringEqualsFile($targetFilePath, 'SOURCE FILE');
    }

    public function testCopyFails()
    {
        $this->expectException(IOException::class);
        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        $this->filesystem->copy($sourceFilePath, $targetFilePath);
    }

    public function testCopyUnreadableFileFails()
    {
        $this->expectException(IOException::class);
        // skip test on Windows; PHP can't easily set file as unreadable on Windows
        if ('\\' === \DIRECTORY_SEPARATOR) {
            $this->markTestSkipped('This test cannot run on Windows.');
        }

        if (!getenv('USER') || 'root' === getenv('USER')) {
            $this->markTestSkipped('This test will fail if run under superuser');
        }

        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');

        // make sure target cannot be read
        $this->filesystem->chmod($sourceFilePath, 0222);

        $this->filesystem->copy($sourceFilePath, $targetFilePath);
    }

    public function testCopyOverridesExistingFileIfModified()
    {
        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');
        file_put_contents($targetFilePath, 'TARGET FILE');
        touch($targetFilePath, time() - 1000);

        $this->filesystem->copy($sourceFilePath, $targetFilePath);

        $this->assertFileExists($targetFilePath);
        $this->assertStringEqualsFile($targetFilePath, 'SOURCE FILE');
    }

    public function testCopyDoesNotOverrideExistingFileByDefault()
    {
        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');
        file_put_contents($targetFilePath, 'TARGET FILE');

        // make sure both files have the same modification time
        $modificationTime = time() - 1000;
        touch($sourceFilePath, $modificationTime);
        touch($targetFilePath, $modificationTime);

        $this->filesystem->copy($sourceFilePath, $targetFilePath);

        $this->assertFileExists($targetFilePath);
        $this->assertStringEqualsFile($targetFilePath, 'TARGET FILE');
    }

    public function testCopyOverridesExistingFileIfForced()
    {
        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');
        file_put_contents($targetFilePath, 'TARGET FILE');

        // make sure both files have the same modification time
        $modificationTime = time() - 1000;
        touch($sourceFilePath, $modificationTime);
        touch($targetFilePath, $modificationTime);

        $this->filesystem->copy($sourceFilePath, $targetFilePath, true);

        $this->assertFileExists($targetFilePath);
        $this->assertStringEqualsFile($targetFilePath, 'SOURCE FILE');
    }

    public function testCopyWithOverrideWithReadOnlyTargetFails()
    {
        $this->expectException(IOException::class);
        // skip test on Windows; PHP can't easily set file as unwritable on Windows
        if ('\\' === \DIRECTORY_SEPARATOR) {
            $this->markTestSkipped('This test cannot run on Windows.');
        }

        if (!getenv('USER') || 'root' === getenv('USER')) {
            $this->markTestSkipped('This test will fail if run under superuser');
        }

        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');
        file_put_contents($targetFilePath, 'TARGET FILE');

        // make sure both files have the same modification time
        $modificationTime = time() - 1000;
        touch($sourceFilePath, $modificationTime);
        touch($targetFilePath, $modificationTime);

        // make sure target is read-only
        $this->filesystem->chmod($targetFilePath, 0444);

        $this->filesystem->copy($sourceFilePath, $targetFilePath, true);
    }

    public function testCopyCreatesTargetDirectoryIfItDoesNotExist()
    {
        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFileDirectory = $this->workspace.\DIRECTORY_SEPARATOR.'directory';
        $targetFilePath = $targetFileDirectory.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');

        $this->filesystem->copy($sourceFilePath, $targetFilePath);

        $this->assertDirectoryExists($targetFileDirectory);
        $this->assertFileExists($targetFilePath);
        $this->assertStringEqualsFile($targetFilePath, 'SOURCE FILE');
    }

    /**
     * @group network
     */
    public function testCopyForOriginUrlsAndExistingLocalFileDefaultsToCopy()
    {
        if (!\in_array('https', stream_get_wrappers(), true)) {
            $this->markTestSkipped('"https" stream wrapper is not enabled.');
        }
        $sourceFilePath = 'https://symfony.com/images/common/logo/logo_symfony_header.png';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($targetFilePath, 'TARGET FILE');

        $this->filesystem->copy($sourceFilePath, $targetFilePath, false);

        $this->assertFileExists($targetFilePath);
        $this->assertEquals(file_get_contents($sourceFilePath), file_get_contents($targetFilePath));
    }

    public function testMkdirCreatesDirectoriesRecursively()
    {
        $directory = $this->workspace
            .\DIRECTORY_SEPARATOR.'directory'
            .\DIRECTORY_SEPARATOR.'sub_directory';

        $this->filesystem->mkdir($directory);

        $this->assertDirectoryExists($directory);
    }

    public function testMkdirCreatesDirectoriesFromArray()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
        $directories = [
            $basePath.'1', $basePath.'2', $basePath.'3',
        ];

        $this->filesystem->mkdir($directories);

        $this->assertDirectoryExists($basePath.'1');
        $this->assertDirectoryExists($basePath.'2');
        $this->assertDirectoryExists($basePath.'3');
    }

    public function testMkdirCreatesDirectoriesFromTraversableObject()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
        $directories = new \ArrayObject([
            $basePath.'1', $basePath.'2', $basePath.'3',
        ]);

        $this->filesystem->mkdir($directories);

        $this->assertDirectoryExists($basePath.'1');
        $this->assertDirectoryExists($basePath.'2');
        $this->assertDirectoryExists($basePath.'3');
    }

    public function testMkdirCreatesDirectoriesFails()
    {
        $this->expectException(IOException::class);
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
        $dir = $basePath.'2';

        file_put_contents($dir, '');

        $this->filesystem->mkdir($dir);
    }

    public function testTouchCreatesEmptyFile()
    {
        $file = $this->workspace.\DIRECTORY_SEPARATOR.'1';

        $this->filesystem->touch($file);

        $this->assertFileExists($file);
    }

    public function testTouchFails()
    {
        $this->expectException(IOException::class);
        $file = $this->workspace.\DIRECTORY_SEPARATOR.'1'.\DIRECTORY_SEPARATOR.'2';

        $this->filesystem->touch($file);
    }

    public function testTouchCreatesEmptyFilesFromArray()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
        $files = [
            $basePath.'1', $basePath.'2', $basePath.'3',
        ];

        $this->filesystem->touch($files);

        $this->assertFileExists($basePath.'1');
        $this->assertFileExists($basePath.'2');
        $this->assertFileExists($basePath.'3');
    }

    public function testTouchCreatesEmptyFilesFromTraversableObject()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
        $files = new \ArrayObject([
            $basePath.'1', $basePath.'2', $basePath.'3',
        ]);

        $this->filesystem->touch($files);

        $this->assertFileExists($basePath.'1');
        $this->assertFileExists($basePath.'2');
        $this->assertFileExists($basePath.'3');
    }

    public function testRemoveCleansFilesAndDirectoriesIteratively()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR.'directory'.\DIRECTORY_SEPARATOR;

        mkdir($basePath);
        mkdir($basePath.'dir');
        touch($basePath.'file');

        $this->filesystem->remove($basePath);

        $this->assertFileDoesNotExist($basePath);
    }

    public function testRemoveCleansArrayOfFilesAndDirectories()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;

        mkdir($basePath.'dir');
        touch($basePath.'file');

        $files = [
            $basePath.'dir', $basePath.'file',
        ];

        $this->filesystem->remove($files);

        $this->assertFileDoesNotExist($basePath.'dir');
        $this->assertFileDoesNotExist($basePath.'file');
    }

    public function testRemoveCleansTraversableObjectOfFilesAndDirectories()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;

        mkdir($basePath.'dir');
        touch($basePath.'file');

        $files = new \ArrayObject([
            $basePath.'dir', $basePath.'file',
        ]);

        $this->filesystem->remove($files);

        $this->assertFileDoesNotExist($basePath.'dir');
        $this->assertFileDoesNotExist($basePath.'file');
    }

    public function testRemoveIgnoresNonExistingFiles()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;

        mkdir($basePath.'dir');

        $files = [
            $basePath.'dir', $basePath.'file',
        ];

        $this->filesystem->remove($files);

        $this->assertFileDoesNotExist($basePath.'dir');
    }

    public function testRemoveThrowsExceptionOnPermissionDenied()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $basePath = $this->workspace.\DIRECTORY_SEPARATOR.'dir_permissions';
        mkdir($basePath);
        $file = $basePath.\DIRECTORY_SEPARATOR.'file';
        touch($file);
        chmod($basePath, 0400);

        try {
            $this->filesystem->remove($file);
            $this->fail('Filesystem::remove() should throw an exception');
        } catch (IOException $e) {
            $this->assertStringContainsString('Failed to remove file "'.$file.'"', $e->getMessage());
            $this->assertStringContainsString('Permission denied', $e->getMessage());
        } finally {
            // Make sure we can clean up this file
            chmod($basePath, 0777);
        }
    }

    public function testRemoveCleansInvalidLinks()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $basePath = $this->workspace.\DIRECTORY_SEPARATOR.'directory'.\DIRECTORY_SEPARATOR;

        mkdir($basePath);
        mkdir($basePath.'dir');
        // create symlink to nonexistent file
        @symlink($basePath.'file', $basePath.'file-link');

        // create symlink to dir using trailing forward slash
        $this->filesystem->symlink($basePath.'dir/', $basePath.'dir-link');
        $this->assertDirectoryExists($basePath.'dir-link');

        // create symlink to nonexistent dir
        rmdir($basePath.'dir');
        $this->assertDirectoryDoesNotExist($basePath.'dir-link');

        $this->filesystem->remove($basePath);

        $this->assertFileDoesNotExist($basePath);
    }

    public function testFilesExists()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR.'directory'.\DIRECTORY_SEPARATOR;

        mkdir($basePath);
        touch($basePath.'file1');
        mkdir($basePath.'folder');

        $this->assertTrue($this->filesystem->exists($basePath.'file1'));
        $this->assertTrue($this->filesystem->exists($basePath.'folder'));
    }

    public function testFilesExistsFails()
    {
        $this->expectException(IOException::class);
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $this->markTestSkipped('Long file names are an issue on Windows');
        }
        $basePath = $this->workspace.'\\directory\\';
        $maxPathLength = \PHP_MAXPATHLEN - 2;

        $oldPath = getcwd();
        mkdir($basePath);
        chdir($basePath);
        $file = str_repeat('T', $maxPathLength - \strlen($basePath) + 1);
        $path = $basePath.$file;
        exec('TYPE NUL >>'.$file); // equivalent of touch, we cannot use the php touch() here because it suffers from the same limitation
        $this->longPathNamesWindows[] = $path; // save this so we can clean up later
        chdir($oldPath);
        $this->filesystem->exists($path);
    }

    public function testFilesExistsTraversableObjectOfFilesAndDirectories()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;

        mkdir($basePath.'dir');
        touch($basePath.'file');

        $files = new \ArrayObject([
            $basePath.'dir', $basePath.'file',
        ]);

        $this->assertTrue($this->filesystem->exists($files));
    }

    public function testFilesNotExistsTraversableObjectOfFilesAndDirectories()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR;

        mkdir($basePath.'dir');
        touch($basePath.'file');
        touch($basePath.'file2');

        $files = new \ArrayObject([
            $basePath.'dir', $basePath.'file', $basePath.'file2',
        ]);

        unlink($basePath.'file');

        $this->assertFalse($this->filesystem->exists($files));
    }

    public function testInvalidFileNotExists()
    {
        $basePath = $this->workspace.\DIRECTORY_SEPARATOR.'directory'.\DIRECTORY_SEPARATOR;

        $this->assertFalse($this->filesystem->exists($basePath.time()));
    }

    public function testChmodChangesFileMode()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);
        $file = $dir.\DIRECTORY_SEPARATOR.'file';
        touch($file);

        $this->filesystem->chmod($file, 0400);
        $this->filesystem->chmod($dir, 0753);

        $this->assertFilePermissions(753, $dir);
        $this->assertFilePermissions(400, $file);
    }

    public function testChmodRecursive()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);
        $file = $dir.\DIRECTORY_SEPARATOR.'file';
        touch($file);

        $this->filesystem->chmod($file, 0400, 0000, true);
        $this->filesystem->chmod($dir, 0753, 0000, true);

        $this->assertFilePermissions(753, $dir);
        $this->assertFilePermissions(753, $file);
    }

    public function testChmodAppliesUmask()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        touch($file);

        $this->filesystem->chmod($file, 0770, 0022);
        $this->assertFilePermissions(750, $file);
    }

    public function testChmodChangesModeOfArrayOfFiles()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $directory = $this->workspace.\DIRECTORY_SEPARATOR.'directory';
        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $files = [$directory, $file];

        mkdir($directory);
        touch($file);

        $this->filesystem->chmod($files, 0753);

        $this->assertFilePermissions(753, $file);
        $this->assertFilePermissions(753, $directory);
    }

    public function testChmodChangesModeOfTraversableFileObject()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $directory = $this->workspace.\DIRECTORY_SEPARATOR.'directory';
        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $files = new \ArrayObject([$directory, $file]);

        mkdir($directory);
        touch($file);

        $this->filesystem->chmod($files, 0753);

        $this->assertFilePermissions(753, $file);
        $this->assertFilePermissions(753, $directory);
    }

    public function testChmodChangesZeroModeOnSubdirectoriesOnRecursive()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $directory = $this->workspace.\DIRECTORY_SEPARATOR.'directory';
        $subdirectory = $directory.\DIRECTORY_SEPARATOR.'subdirectory';

        mkdir($directory);
        mkdir($subdirectory);
        chmod($subdirectory, 0000);

        $this->filesystem->chmod($directory, 0753, 0000, true);

        $this->assertFilePermissions(753, $subdirectory);
    }

    public function testChownByName()
    {
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);

        $owner = $this->getFileOwner($dir);
        $this->filesystem->chown($dir, $owner);

        $this->assertSame($owner, $this->getFileOwner($dir));
    }

    public function testChownById()
    {
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);

        $ownerId = $this->getFileOwnerId($dir);
        $this->filesystem->chown($dir, $ownerId);

        $this->assertSame($ownerId, $this->getFileOwnerId($dir));
    }

    public function testChownRecursiveByName()
    {
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);
        $file = $dir.\DIRECTORY_SEPARATOR.'file';
        touch($file);

        $owner = $this->getFileOwner($dir);
        $this->filesystem->chown($dir, $owner, true);

        $this->assertSame($owner, $this->getFileOwner($file));
    }

    public function testChownRecursiveById()
    {
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);
        $file = $dir.\DIRECTORY_SEPARATOR.'file';
        touch($file);

        $ownerId = $this->getFileOwnerId($dir);
        $this->filesystem->chown($dir, $ownerId, true);

        $this->assertSame($ownerId, $this->getFileOwnerId($file));
    }

    public function testChownSymlink()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->symlink($file, $link);

        $owner = $this->getFileOwner($link);
        $this->filesystem->chown($link, $owner);

        $this->assertSame($owner, $this->getFileOwner($link));
    }

    public function testChownLink()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->hardlink($file, $link);

        $owner = $this->getFileOwner($link);
        $this->filesystem->chown($link, $owner);

        $this->assertSame($owner, $this->getFileOwner($link));
    }

    public function testChownSymlinkFails()
    {
        $this->expectException(IOException::class);
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->symlink($file, $link);

        $this->filesystem->chown($link, 'user'.time().mt_rand(1000, 9999));
    }

    public function testChownLinkFails()
    {
        $this->expectException(IOException::class);
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->hardlink($file, $link);

        $this->filesystem->chown($link, 'user'.time().mt_rand(1000, 9999));
    }

    public function testChownFail()
    {
        $this->expectException(IOException::class);
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);

        $this->filesystem->chown($dir, 'user'.time().mt_rand(1000, 9999));
    }

    public function testChgrpByName()
    {
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);

        $group = $this->getFileGroup($dir);
        $this->filesystem->chgrp($dir, $group);

        $this->assertSame($group, $this->getFileGroup($dir));
    }

    public function testChgrpById()
    {
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);

        $groupId = $this->getFileGroupId($dir);
        $this->filesystem->chgrp($dir, $groupId);

        $this->assertSame($groupId, $this->getFileGroupId($dir));
    }

    public function testChgrpRecursive()
    {
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);
        $file = $dir.\DIRECTORY_SEPARATOR.'file';
        touch($file);

        $group = $this->getFileGroup($dir);
        $this->filesystem->chgrp($dir, $group, true);

        $this->assertSame($group, $this->getFileGroup($file));
    }

    public function testChgrpSymlinkByName()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->symlink($file, $link);

        $group = $this->getFileGroup($link);
        $this->filesystem->chgrp($link, $group);

        $this->assertSame($group, $this->getFileGroup($link));
    }

    public function testChgrpSymlinkById()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->symlink($file, $link);

        $groupId = $this->getFileGroupId($link);
        $this->filesystem->chgrp($link, $groupId);

        $this->assertSame($groupId, $this->getFileGroupId($link));
    }

    public function testChgrpLink()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->hardlink($file, $link);

        $group = $this->getFileGroup($link);
        $this->filesystem->chgrp($link, $group);

        $this->assertSame($group, $this->getFileGroup($link));
    }

    public function testChgrpSymlinkFails()
    {
        $this->expectException(IOException::class);
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->symlink($file, $link);

        $this->filesystem->chgrp($link, 'user'.time().mt_rand(1000, 9999));
    }

    public function testChgrpLinkFails()
    {
        $this->expectException(IOException::class);
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->hardlink($file, $link);

        $this->filesystem->chgrp($link, 'user'.time().mt_rand(1000, 9999));
    }

    public function testChgrpFail()
    {
        $this->expectException(IOException::class);
        $this->markAsSkippedIfPosixIsMissing();

        $dir = $this->workspace.\DIRECTORY_SEPARATOR.'dir';
        mkdir($dir);

        $this->filesystem->chgrp($dir, 'user'.time().mt_rand(1000, 9999));
    }

    public function testRename()
    {
        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $newPath = $this->workspace.\DIRECTORY_SEPARATOR.'new_file';
        touch($file);

        $this->filesystem->rename($file, $newPath);

        $this->assertFileDoesNotExist($file);
        $this->assertFileExists($newPath);
    }

    public function testRenameThrowsExceptionIfTargetAlreadyExists()
    {
        $this->expectException(IOException::class);
        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $newPath = $this->workspace.\DIRECTORY_SEPARATOR.'new_file';

        touch($file);
        touch($newPath);

        $this->filesystem->rename($file, $newPath);
    }

    public function testRenameOverwritesTheTargetIfItAlreadyExists()
    {
        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $newPath = $this->workspace.\DIRECTORY_SEPARATOR.'new_file';

        touch($file);
        touch($newPath);

        $this->filesystem->rename($file, $newPath, true);

        $this->assertFileDoesNotExist($file);
        $this->assertFileExists($newPath);
    }

    public function testRenameThrowsExceptionOnError()
    {
        $this->expectException(IOException::class);
        $file = $this->workspace.\DIRECTORY_SEPARATOR.uniqid('fs_test_', true);
        $newPath = $this->workspace.\DIRECTORY_SEPARATOR.'new_file';

        $this->filesystem->rename($file, $newPath);
    }

    public function testSymlink()
    {
        if ('\\' === \DIRECTORY_SEPARATOR) {
            $this->markTestSkipped('Windows does not support creating "broken" symlinks');
        }

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        // $file does not exist right now: creating "broken" links is a wanted feature
        $this->filesystem->symlink($file, $link);

        $this->assertTrue(is_link($link));

        // Create the linked file AFTER creating the link
        touch($file);

        $this->assertEquals($file, readlink($link));
    }

    /**
     * @depends testSymlink
     */
    public function testRemoveSymlink()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        $this->filesystem->remove($link);

        $this->assertFalse(is_link($link));
        $this->assertFalse(is_file($link));
        $this->assertDirectoryDoesNotExist($link);
    }

    public function testSymlinkIsOverwrittenIfPointsToDifferentTarget()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);
        symlink($this->workspace, $link);

        $this->filesystem->symlink($file, $link);

        $this->assertTrue(is_link($link));
        $this->assertEquals($file, readlink($link));
    }

    public function testSymlinkIsNotOverwrittenIfAlreadyCreated()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);
        symlink($file, $link);

        $this->filesystem->symlink($file, $link);

        $this->assertTrue(is_link($link));
        $this->assertEquals($file, readlink($link));
    }

    public function testSymlinkCreatesTargetDirectoryIfItDoesNotExist()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link1 = $this->workspace.\DIRECTORY_SEPARATOR.'dir'.\DIRECTORY_SEPARATOR.'link';
        $link2 = $this->workspace.\DIRECTORY_SEPARATOR.'dir'.\DIRECTORY_SEPARATOR.'subdir'.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        $this->filesystem->symlink($file, $link1);
        $this->filesystem->symlink($file, $link2);

        $this->assertTrue(is_link($link1));
        $this->assertEquals($file, readlink($link1));
        $this->assertTrue(is_link($link2));
        $this->assertEquals($file, readlink($link2));
    }

    public function testLink()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);
        $this->filesystem->hardlink($file, $link);

        $this->assertTrue(is_file($link));
        $this->assertEquals(fileinode($file), fileinode($link));
    }

    /**
     * @depends testLink
     */
    public function testRemoveLink()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        $this->filesystem->remove($link);

        $this->assertTrue(!is_file($link));
    }

    public function testLinkIsOverwrittenIfPointsToDifferentTarget()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $file2 = $this->workspace.\DIRECTORY_SEPARATOR.'file2';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);
        touch($file2);
        link($file2, $link);

        $this->filesystem->hardlink($file, $link);

        $this->assertTrue(is_file($link));
        $this->assertEquals(fileinode($file), fileinode($link));
    }

    public function testLinkIsNotOverwrittenIfAlreadyCreated()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);
        link($file, $link);

        $this->filesystem->hardlink($file, $link);

        $this->assertTrue(is_file($link));
        $this->assertEquals(fileinode($file), fileinode($link));
    }

    public function testLinkWithSeveralTargets()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link1 = $this->workspace.\DIRECTORY_SEPARATOR.'link';
        $link2 = $this->workspace.\DIRECTORY_SEPARATOR.'link2';

        touch($file);

        $this->filesystem->hardlink($file, [$link1, $link2]);

        $this->assertTrue(is_file($link1));
        $this->assertEquals(fileinode($file), fileinode($link1));
        $this->assertTrue(is_file($link2));
        $this->assertEquals(fileinode($file), fileinode($link2));
    }

    public function testLinkWithSameTarget()
    {
        $this->markAsSkippedIfLinkIsMissing();

        $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
        $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';

        touch($file);

        // practically same as testLinkIsNotOverwrittenIfAlreadyCreated
        $this->filesystem->hardlink($file, [$link, $link]);

        $this->assertTrue(is_file($link));
        $this->assertEquals(fileinode($file), fileinode($link));
    }

    public function testReadRelativeLink()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        if ('\\' === \DIRECTORY_SEPARATOR) {
            $this->markTestSkipped('Relative symbolic links are not supported on Windows');
        }

        $file = $this->workspace.'/file';
        $link1 = $this->workspace.'/dir/link';
        $link2 = $this->workspace.'/dir/link2';
        touch($file);

        $this->filesystem->symlink('../file', $link1);
        $this->filesystem->symlink('link', $link2);

        $this->assertEquals($this->normalize('../file'), $this->filesystem->readlink($link1));
        $this->assertEquals('link', $this->filesystem->readlink($link2));
        $this->assertEquals($file, $this->filesystem->readlink($link1, true));
        $this->assertEquals($file, $this->filesystem->readlink($link2, true));
        $this->assertEquals($file, $this->filesystem->readlink($file, true));
    }

    public function testReadAbsoluteLink()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->normalize($this->workspace.'/file');
        $link1 = $this->normalize($this->workspace.'/dir/link');
        $link2 = $this->normalize($this->workspace.'/dir/link2');
        touch($file);

        $this->filesystem->symlink($file, $link1);
        $this->filesystem->symlink($link1, $link2);

        $this->assertEquals($file, $this->filesystem->readlink($link1));

        $this->assertEquals($link1, $this->filesystem->readlink($link2));
        $this->assertEquals($file, $this->filesystem->readlink($link1, true));
        $this->assertEquals($file, $this->filesystem->readlink($link2, true));
        $this->assertEquals($file, $this->filesystem->readlink($file, true));
    }

    public function testReadBrokenLink()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = Path::join($this->workspace, 'file');
        $link = Path::join($this->workspace, 'link');

        touch($file);
        $this->filesystem->symlink($file, $link);
        $this->filesystem->remove($file);

        $this->assertEquals($file, Path::normalize($this->filesystem->readlink($link)));
        $this->assertNull($this->filesystem->readlink($link, true));

        touch($file);
        $this->assertEquals($file, Path::normalize($this->filesystem->readlink($link, true)));
    }

    public function testReadLinkDefaultPathDoesNotExist()
    {
        $this->assertNull($this->filesystem->readlink($this->normalize($this->workspace.'/invalid')));
    }

    public function testReadLinkDefaultPathNotLink()
    {
        $file = $this->normalize($this->workspace.'/file');
        touch($file);

        $this->assertNull($this->filesystem->readlink($file));
    }

    public function testReadLinkCanonicalizePath()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $file = $this->normalize($this->workspace.'/file');
        mkdir($this->normalize($this->workspace.'/dir'));
        touch($file);

        $this->assertEquals($file, $this->filesystem->readlink($this->normalize($this->workspace.'/dir/../file'), true));
    }

    public function testReadLinkCanonicalizedPathDoesNotExist()
    {
        $this->assertNull($this->filesystem->readlink($this->normalize($this->workspace.'invalid'), true));
    }

    /**
     * @dataProvider providePathsForMakePathRelative
     */
    public function testMakePathRelative($endPath, $startPath, $expectedPath)
    {
        $path = $this->filesystem->makePathRelative($endPath, $startPath);

        $this->assertEquals($expectedPath, $path);
    }

    public static function providePathsForMakePathRelative()
    {
        $paths = [
            ['/var/lib/symfony/src/Symfony/', '/var/lib/symfony/src/Symfony/Component', '../'],
            ['/var/lib/symfony/src/Symfony/', '/var/lib/symfony/src/Symfony/Component/', '../'],
            ['/var/lib/symfony/src/Symfony', '/var/lib/symfony/src/Symfony/Component', '../'],
            ['/var/lib/symfony/src/Symfony', '/var/lib/symfony/src/Symfony/Component/', '../'],
            ['/usr/lib/symfony/', '/var/lib/symfony/src/Symfony/Component', '../../../../../../usr/lib/symfony/'],
            ['/var/lib/symfony/src/Symfony/', '/var/lib/symfony/', 'src/Symfony/'],
            ['/aa/bb', '/aa/bb', './'],
            ['/aa/bb', '/aa/bb/', './'],
            ['/aa/bb/', '/aa/bb', './'],
            ['/aa/bb/', '/aa/bb/', './'],
            ['/aa/bb/cc', '/aa/bb/cc/dd', '../'],
            ['/aa/bb/cc', '/aa/bb/cc/dd/', '../'],
            ['/aa/bb/cc/', '/aa/bb/cc/dd', '../'],
            ['/aa/bb/cc/', '/aa/bb/cc/dd/', '../'],
            ['/aa/bb/cc', '/aa', 'bb/cc/'],
            ['/aa/bb/cc', '/aa/', 'bb/cc/'],
            ['/aa/bb/cc/', '/aa', 'bb/cc/'],
            ['/aa/bb/cc/', '/aa/', 'bb/cc/'],
            ['/a/aab/bb', '/a/aa', '../aab/bb/'],
            ['/a/aab/bb', '/a/aa/', '../aab/bb/'],
            ['/a/aab/bb/', '/a/aa', '../aab/bb/'],
            ['/a/aab/bb/', '/a/aa/', '../aab/bb/'],
            ['/a/aab/bb/', '/', 'a/aab/bb/'],
            ['/a/aab/bb/', '/b/aab', '../../a/aab/bb/'],
            ['/aab/bb', '/aa', '../aab/bb/'],
            ['/aab', '/aa', '../aab/'],
            ['/aa/bb/cc', '/aa/dd/..', 'bb/cc/'],
            ['/aa/../bb/cc', '/aa/dd/..', '../bb/cc/'],
            ['/aa/bb/../../cc', '/aa/../dd/..', 'cc/'],
            ['/../aa/bb/cc', '/aa/dd/..', 'bb/cc/'],
            ['/../../aa/../bb/cc', '/aa/dd/..', '../bb/cc/'],
            ['C:/aa/bb/cc', 'C:/aa/dd/..', 'bb/cc/'],
            ['C:/aa/bb/cc', 'c:/aa/dd/..', 'bb/cc/'],
            ['c:/aa/../bb/cc', 'c:/aa/dd/..', '../bb/cc/'],
            ['C:/aa/bb/../../cc', 'C:/aa/../dd/..', 'cc/'],
            ['C:/../aa/bb/cc', 'C:/aa/dd/..', 'bb/cc/'],
            ['C:/../../aa/../bb/cc', 'C:/aa/dd/..', '../bb/cc/'],
            ['D:/', 'C:/aa/../bb/cc', 'D:/'],
            ['D:/aa/bb', 'C:/aa', 'D:/aa/bb/'],
            ['D:/../../aa/../bb/cc', 'C:/aa/dd/..', 'D:/bb/cc/'],
        ];

        if ('\\' === \DIRECTORY_SEPARATOR) {
            $paths[] = ['c:\var\lib/symfony/src/Symfony/', 'c:/var/lib/symfony/', 'src/Symfony/'];
        }

        return $paths;
    }

    public function testMakePathRelativeWithRelativeStartPath()
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('The start path "var/lib/symfony/src/Symfony/Component" is not absolute.');
        $this->assertSame('../../../', $this->filesystem->makePathRelative('/var/lib/symfony/', 'var/lib/symfony/src/Symfony/Component'));
    }

    public function testMakePathRelativeWithRelativeEndPath()
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('The end path "var/lib/symfony/" is not absolute.');
        $this->assertSame('../../../', $this->filesystem->makePathRelative('var/lib/symfony/', '/var/lib/symfony/src/Symfony/Component'));
    }

    public function testMirrorCopiesFilesAndDirectoriesRecursively()
    {
        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;
        $directory = $sourcePath.'directory'.\DIRECTORY_SEPARATOR;
        $file1 = $directory.'file1';
        $file2 = $sourcePath.'file2';

        mkdir($sourcePath);
        mkdir($directory);
        file_put_contents($file1, 'FILE1');
        file_put_contents($file2, 'FILE2');

        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;

        $this->filesystem->mirror($sourcePath, $targetPath);

        $this->assertDirectoryExists($targetPath);
        $this->assertDirectoryExists($targetPath.'directory');
        $this->assertFileEquals($file1, $targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1');
        $this->assertFileEquals($file2, $targetPath.'file2');

        $this->filesystem->remove($file1);

        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => false]);
        $this->assertTrue($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));

        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => true]);
        $this->assertFalse($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));

        file_put_contents($file1, 'FILE1');

        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => true]);
        $this->assertTrue($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));

        $this->filesystem->remove($directory);
        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => true]);
        $this->assertFalse($this->filesystem->exists($targetPath.'directory'));
        $this->assertFalse($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));
    }

    public function testMirrorCreatesEmptyDirectory()
    {
        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;

        mkdir($sourcePath);

        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;

        $this->filesystem->mirror($sourcePath, $targetPath);

        $this->assertDirectoryExists($targetPath);

        $this->filesystem->remove($sourcePath);
    }

    public function testMirrorCopiesLinks()
    {
        $this->markAsSkippedIfSymlinkIsMissing();

        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;

        mkdir($sourcePath);
        file_put_contents($sourcePath.'file1', 'FILE1');
        symlink($sourcePath.'file1', $sourcePath.'link1');

        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;

        $this->filesystem->mirror($sourcePath, $targetPath);

        $this->assertDirectoryExists($targetPath);
        $this->assertFileEquals($sourcePath.'file1', $targetPath.'link1');
        $this->assertTrue(is_link($targetPath.\DIRECTORY_SEPARATOR.'link1'));
    }

    public function testMirrorCopiesLinkedDirectoryContents()
    {
        $this->markAsSkippedIfSymlinkIsMissing(true);

        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;

        mkdir($sourcePath.'nested/', 0777, true);
        file_put_contents($sourcePath.'/nested/file1.txt', 'FILE1');
        // Note: We symlink directory, not file
        symlink($sourcePath.'nested', $sourcePath.'link1');

        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;

        $this->filesystem->mirror($sourcePath, $targetPath);

        $this->assertDirectoryExists($targetPath);
        $this->assertFileEquals($sourcePath.'/nested/file1.txt', $targetPath.'link1/file1.txt');
        $this->assertTrue(is_link($targetPath.\DIRECTORY_SEPARATOR.'link1'));
    }

    public function testMirrorCopiesRelativeLinkedContents()
    {
        $this->markAsSkippedIfSymlinkIsMissing(true);

        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;
        $oldPath = getcwd();

        mkdir($sourcePath.'nested/', 0777, true);
        file_put_contents($sourcePath.'/nested/file1.txt', 'FILE1');
        // Note: Create relative symlink
        chdir($sourcePath);
        symlink('nested', 'link1');

        chdir($oldPath);

        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;

        $this->filesystem->mirror($sourcePath, $targetPath);

        $this->assertDirectoryExists($targetPath);
        $this->assertFileEquals($sourcePath.'/nested/file1.txt', $targetPath.'link1/file1.txt');
        $this->assertTrue(is_link($targetPath.\DIRECTORY_SEPARATOR.'link1'));
        $this->assertEquals('\\' === \DIRECTORY_SEPARATOR ? realpath($sourcePath.'\nested') : 'nested', readlink($targetPath.\DIRECTORY_SEPARATOR.'link1'));
    }

    public function testMirrorContentsWithSameNameAsSourceOrTargetWithoutDeleteOption()
    {
        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;

        mkdir($sourcePath);
        touch($sourcePath.'source');
        touch($sourcePath.'target');

        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;

        $oldPath = getcwd();
        chdir($this->workspace);

        $this->filesystem->mirror('source', $targetPath);

        chdir($oldPath);

        $this->assertDirectoryExists($targetPath);
        $this->assertFileExists($targetPath.'source');
        $this->assertFileExists($targetPath.'target');
    }

    public function testMirrorContentsWithSameNameAsSourceOrTargetWithDeleteOption()
    {
        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;

        mkdir($sourcePath);
        touch($sourcePath.'source');

        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;

        mkdir($targetPath);
        touch($targetPath.'source');
        touch($targetPath.'target');

        $oldPath = getcwd();
        chdir($this->workspace);

        $this->filesystem->mirror('source', 'target', null, ['delete' => true]);

        chdir($oldPath);

        $this->assertDirectoryExists($targetPath);
        $this->assertFileExists($targetPath.'source');
        $this->assertFileDoesNotExist($targetPath.'target');
    }

    public function testMirrorAvoidCopyingTargetDirectoryIfInSourceDirectory()
    {
        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;
        $directory = $sourcePath.'directory'.\DIRECTORY_SEPARATOR;
        $file1 = $directory.'file1';
        $file2 = $sourcePath.'file2';

        mkdir($sourcePath);
        mkdir($directory);
        file_put_contents($file1, 'FILE1');
        file_put_contents($file2, 'FILE2');

        $targetPath = $sourcePath.'target'.\DIRECTORY_SEPARATOR;

        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $this->filesystem->symlink($targetPath, $sourcePath.'target_simlink');
        }

        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => true]);

        $this->assertTrue($this->filesystem->exists($targetPath));
        $this->assertTrue($this->filesystem->exists($targetPath.'directory'));

        $this->assertFileEquals($file1, $targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1');
        $this->assertFileEquals($file2, $targetPath.'file2');

        $this->assertFalse($this->filesystem->exists($targetPath.'target_simlink'));
        $this->assertFalse($this->filesystem->exists($targetPath.'target'));
    }

    public function testMirrorFromSubdirectoryInToParentDirectory()
    {
        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR;
        $sourcePath = $targetPath.'bar'.\DIRECTORY_SEPARATOR;
        $file1 = $sourcePath.'file1';
        $file2 = $sourcePath.'file2';

        $this->filesystem->mkdir($sourcePath);
        file_put_contents($file1, 'FILE1');
        file_put_contents($file2, 'FILE2');

        $this->filesystem->mirror($sourcePath, $targetPath);

        $this->assertFileEquals($file1, $targetPath.'file1');
    }

    /**
     * @dataProvider providePathsForIsAbsolutePath
     */
    public function testIsAbsolutePath($path, $expectedResult)
    {
        $result = $this->filesystem->isAbsolutePath($path);

        $this->assertEquals($expectedResult, $result);
    }

    public static function providePathsForIsAbsolutePath()
    {
        return [
            ['/var/lib', true],
            ['c:\\\\var\\lib', true],
            ['\\var\\lib', true],
            ['var/lib', false],
            ['../var/lib', false],
            ['', false],
        ];
    }

    public function testTempnam()
    {
        $dirname = $this->workspace;

        $filename = $this->filesystem->tempnam($dirname, 'foo');

        $this->assertFileExists($filename);
    }

    public function testTempnamWithFileScheme()
    {
        $scheme = 'file://';
        $dirname = $scheme.$this->workspace;

        $filename = $this->filesystem->tempnam($dirname, 'foo');

        $this->assertStringStartsWith($scheme, $filename);
        $this->assertFileExists($filename);
    }

    public function testTempnamWithMockScheme()
    {
        stream_wrapper_register('mock', 'Symfony\Component\Filesystem\Tests\Fixtures\MockStream\MockStream');

        $scheme = 'mock://';
        $dirname = $scheme.$this->workspace;

        $filename = $this->filesystem->tempnam($dirname, 'foo');

        $this->assertStringStartsWith($scheme, $filename);
        $this->assertFileExists($filename);
    }

    public function testTempnamWithZlibSchemeFails()
    {
        $this->expectException(IOException::class);
        $scheme = 'compress.zlib://';
        $dirname = $scheme.$this->workspace;

        // The compress.zlib:// stream does not support mode x: creates the file, errors "failed to open stream: operation failed" and returns false
        $this->filesystem->tempnam($dirname, 'bar');
    }

    public function testTempnamWithPHPTempSchemeFails()
    {
        $scheme = 'php://temp';
        $dirname = $scheme;

        $filename = $this->filesystem->tempnam($dirname, 'bar');

        $this->assertStringStartsWith($scheme, $filename);

        // The php://temp stream deletes the file after close
        $this->assertFileDoesNotExist($filename);
    }

    public function testTempnamWithPharSchemeFails()
    {
        $this->expectException(IOException::class);
        // Skip test if Phar disabled phar.readonly must be 0 in php.ini
        if (!\Phar::canWrite()) {
            $this->markTestSkipped('This test cannot run when phar.readonly is 1.');
        }

        $scheme = 'phar://';
        $dirname = $scheme.$this->workspace;
        $pharname = 'foo.phar';

        new \Phar($this->workspace.'/'.$pharname, 0, $pharname);
        // The phar:// stream does not support mode x: fails to create file, errors "failed to open stream: phar error: "$filename" is not a file in phar "$pharname"" and returns false
        $this->filesystem->tempnam($dirname, $pharname.'/bar');
    }

    public function testTempnamWithHTTPSchemeFails()
    {
        $this->expectException(IOException::class);
        $scheme = 'http://';
        $dirname = $scheme.$this->workspace;

        // The http:// scheme is read-only
        $this->filesystem->tempnam($dirname, 'bar');
    }

    public function testTempnamOnUnwritableFallsBackToSysTmp()
    {
        $scheme = 'file://';
        $dirname = $scheme.$this->workspace.\DIRECTORY_SEPARATOR.'does_not_exist';

        $filename = $this->filesystem->tempnam($dirname, 'bar');
        $realTempDir = realpath(sys_get_temp_dir());
        $this->assertStringStartsWith(rtrim($scheme.$realTempDir, \DIRECTORY_SEPARATOR), $filename);
        $this->assertFileExists($filename);

        // Tear down
        @unlink($filename);
    }

    public function testTempnamWithSuffix()
    {
        $dirname = $this->workspace;
        $filename = $this->filesystem->tempnam($dirname, 'foo', '.bar');
        $this->assertStringEndsWith('.bar', $filename);
        $this->assertFileExists($filename);
    }

    public function testTempnamWithSuffix0()
    {
        $dirname = $this->workspace;
        $filename = $this->filesystem->tempnam($dirname, 'foo', '0');
        $this->assertStringEndsWith('0', $filename);
        $this->assertFileExists($filename);
    }

    public function testDumpFile()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'baz.txt';

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $oldMask = umask(0002);
        }

        $this->filesystem->dumpFile($filename, 'bar');
        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'bar');

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $this->assertFilePermissions(664, $filename);
            umask($oldMask);
        }
    }

    public function testDumpFileWithResource()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'baz.txt';

        $resource = fopen('php://memory', 'rw');
        fwrite($resource, 'bar');
        fseek($resource, 0);

        $this->filesystem->dumpFile($filename, $resource);

        fclose($resource);
        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'bar');
    }

    public function testDumpFileOverwritesAnExistingFile()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo.txt';
        file_put_contents($filename, 'FOO BAR');

        $this->filesystem->dumpFile($filename, 'bar');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'bar');
    }

    public function testDumpFileFollowsSymlink()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo.txt';
        file_put_contents($filename, 'FOO BAR');
        $linknameA = $this->workspace.\DIRECTORY_SEPARATOR.'bar.txt';
        $linknameB = $this->workspace.\DIRECTORY_SEPARATOR.'baz.txt';
        $this->filesystem->symlink($filename, $linknameA);
        $this->filesystem->symlink($linknameA, $linknameB);

        $this->filesystem->dumpFile($linknameB, 'bar');

        $this->assertFileExists($filename);
        $this->assertFileExists($linknameA);
        $this->assertFileExists($linknameB);
        $this->assertStringEqualsFile($filename, 'bar');
        $this->assertStringEqualsFile($linknameA, 'bar');
        $this->assertStringEqualsFile($linknameB, 'bar');

        $this->filesystem->remove($filename);
        $this->filesystem->dumpFile($linknameB, 'baz');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'baz');
        $this->assertStringEqualsFile($linknameA, 'baz');
        $this->assertStringEqualsFile($linknameB, 'baz');
    }

    public function testDumpFileWithFileScheme()
    {
        $scheme = 'file://';
        $filename = $scheme.$this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'baz.txt';

        $this->filesystem->dumpFile($filename, 'bar');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'bar');
    }

    public function testDumpFileWithZlibScheme()
    {
        $scheme = 'compress.zlib://';
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'baz.txt';

        $this->filesystem->dumpFile($filename, 'bar');

        // Zlib stat uses file:// wrapper so remove scheme
        $this->assertFileExists(str_replace($scheme, '', $filename));
        $this->assertStringEqualsFile($filename, 'bar');
    }

    public function testAppendToFile()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'bar.txt';

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $oldMask = umask(0002);
        }

        $this->filesystem->dumpFile($filename, 'foo');

        $this->filesystem->appendToFile($filename, 'bar');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'foobar');

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $this->assertFilePermissions(664, $filename);
            umask($oldMask);
        }
    }

    public function testAppendToFileWithResource()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'bar.txt';

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $oldMask = umask(0002);
        }

        $this->filesystem->dumpFile($filename, 'foo');

        $resource = fopen('php://memory', 'rw');
        fwrite($resource, 'bar');
        fseek($resource, 0);

        $this->filesystem->appendToFile($filename, $resource);

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'foobar');

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $this->assertFilePermissions(664, $filename);
            umask($oldMask);
        }
    }

    public function testAppendToFileFollowsSymlink()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo.txt';
        file_put_contents($filename, 'foo');
        $linknameA = $this->workspace.\DIRECTORY_SEPARATOR.'bar.txt';
        $linknameB = $this->workspace.\DIRECTORY_SEPARATOR.'baz.txt';
        $this->filesystem->symlink($filename, $linknameA);
        $this->filesystem->symlink($linknameA, $linknameB);

        $this->filesystem->appendToFile($linknameA, 'bar');
        $this->filesystem->appendToFile($linknameB, 'baz');

        $this->assertFileExists($filename);
        $this->assertFileExists($linknameA);
        $this->assertFileExists($linknameB);
        $this->assertStringEqualsFile($filename, 'foobarbaz');
        $this->assertStringEqualsFile($linknameA, 'foobarbaz');
        $this->assertStringEqualsFile($linknameB, 'foobarbaz');

        $this->filesystem->remove($filename);
        $this->filesystem->appendToFile($linknameB, 'foo');
        $this->filesystem->appendToFile($linknameA, 'bar');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'foobar');
        $this->assertStringEqualsFile($linknameA, 'foobar');
        $this->assertStringEqualsFile($linknameB, 'foobar');
    }

    public function testAppendToFileWithScheme()
    {
        $scheme = 'file://';
        $filename = $scheme.$this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'baz.txt';
        $this->filesystem->dumpFile($filename, 'foo');

        $this->filesystem->appendToFile($filename, 'bar');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'foobar');
    }

    public function testAppendToFileWithZlibScheme()
    {
        $scheme = 'compress.zlib://';
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'baz.txt';
        $this->filesystem->dumpFile($filename, 'foo');

        // Zlib stat uses file:// wrapper so remove it
        $this->assertStringEqualsFile(str_replace($scheme, '', $filename), 'foo');

        $this->filesystem->appendToFile($filename, 'bar');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'foobar');
    }

    public function testAppendToFileCreateTheFileIfNotExists()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'bar.txt';

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $oldMask = umask(0002);
        }

        $this->filesystem->appendToFile($filename, 'bar');

        // skip mode check on Windows
        if ('\\' !== \DIRECTORY_SEPARATOR) {
            $this->assertFilePermissions(664, $filename);
            umask($oldMask);
        }

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'bar');
    }

    public function testDumpRemovesTmpFilesOnFailure()
    {
        $expected = scandir(__DIR__, \SCANDIR_SORT_ASCENDING);

        try {
            $this->filesystem->dumpFile(__DIR__.'/Fixtures', 'bar');
            $this->fail('IOException expected.');
        } catch (IOException $e) {
            $this->assertSame($expected, scandir(__DIR__, \SCANDIR_SORT_ASCENDING));
        }
    }

    public function testDumpKeepsExistingPermissionsWhenOverwritingAnExistingFile()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo.txt';
        file_put_contents($filename, 'FOO BAR');
        chmod($filename, 0745);

        $this->filesystem->dumpFile($filename, 'bar');

        $this->assertFilePermissions(745, $filename);
    }

    public function testReadFile()
    {
        $licenseFile = \dirname(__DIR__).'/LICENSE';

        $this->assertStringEqualsFile($licenseFile, $this->filesystem->readFile($licenseFile));
    }

    public function testReadNonExistentFile()
    {
        $this->expectException(IOException::class);
        $this->expectExceptionMessageMatches(sprintf('#^Failed to read file ".+%1$sTests/invalid"\\: file_get_contents\\(.+%1$sTests/invalid\\)\\: Failed to open stream\\: No such file or directory$#', preg_quote(\DIRECTORY_SEPARATOR)));

        $this->filesystem->readFile(__DIR__.'/invalid');
    }

    public function testReadDirectory()
    {
        $this->expectException(IOException::class);
        $this->expectExceptionMessageMatches(sprintf('#^Failed to read file ".+%sTests"\\: File is a directory\\.$#', preg_quote(\DIRECTORY_SEPARATOR)));

        $this->filesystem->readFile(__DIR__);
    }

    public function testReadUnreadableFile()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $filename = $this->workspace.'/unreadable.txt';
        file_put_contents($filename, 'Hello World');
        chmod($filename, 0o000);

        $this->expectException(IOException::class);
        $this->expectExceptionMessageMatches('#^Failed to read file ".+/unreadable.txt"\\: file_get_contents\\(.+/unreadable.txt\\)\\: Failed to open stream\\: Permission denied$#');

        $this->filesystem->readFile($filename);
    }

    public function testCopyShouldKeepExecutionPermission()
    {
        $this->markAsSkippedIfChmodIsMissing();

        $sourceFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_source_file';
        $targetFilePath = $this->workspace.\DIRECTORY_SEPARATOR.'copy_target_file';

        file_put_contents($sourceFilePath, 'SOURCE FILE');
        chmod($sourceFilePath, 0745);

        $this->filesystem->copy($sourceFilePath, $targetFilePath);

        $this->assertFilePermissions(767, $targetFilePath);
    }

    public function testDumpToProtectedDirectory()
    {
        if (\DIRECTORY_SEPARATOR !== '\\') {
            $this->markTestSkipped('This test is specific to Windows.');
        }

        if (false === ($userProfilePath = getenv('USERPROFILE')) || !is_dir($userProfilePath)) {
            throw new \RuntimeException('Failed to retrieve user profile path.');
        }

        $targetPath = implode(\DIRECTORY_SEPARATOR, [$userProfilePath, 'Downloads', '__test_file.ext']);

        try {
            $this->assertFileDoesNotExist($targetPath);
            $this->filesystem->dumpFile($targetPath, 'foobar');
            $this->assertFileExists($targetPath);
        } finally {
            $this->filesystem->remove($targetPath);
        }
    }

    /**
     * Normalize the given path (transform each forward slash into a real directory separator).
     */
    private function normalize(string $path): string
    {
        return str_replace('/', \DIRECTORY_SEPARATOR, $path);
    }
}