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✏️ Editing: LocalFilesystemAdapterTest.php

<?php

declare(strict_types=1);

namespace League\Flysystem\Local;

use const LOCK_EX;
use League\Flysystem\AdapterTestUtilities\FilesystemAdapterTestCase;
use League\Flysystem\Config;
use League\Flysystem\Filesystem;
use League\Flysystem\FilesystemAdapter;
use League\Flysystem\StorageAttributes;
use League\Flysystem\SymbolicLinkEncountered;
use League\Flysystem\UnableToCopyFile;
use League\Flysystem\UnableToCreateDirectory;
use League\Flysystem\UnableToDeleteDirectory;
use League\Flysystem\UnableToDeleteFile;
use League\Flysystem\UnableToMoveFile;
use League\Flysystem\UnableToReadFile;
use League\Flysystem\UnableToRetrieveMetadata;
use League\Flysystem\UnableToSetVisibility;
use League\Flysystem\UnableToWriteFile;
use League\Flysystem\UnixVisibility\PortableVisibilityConverter;
use League\Flysystem\UnixVisibility\VisibilityConverter;
use League\Flysystem\Visibility;
use League\MimeTypeDetection\EmptyExtensionToMimeTypeMap;
use League\MimeTypeDetection\ExtensionMimeTypeDetector;
use League\MimeTypeDetection\FinfoMimeTypeDetector;
use Traversable;
use function file_get_contents;
use function file_put_contents;
use function fileperms;
use function is_resource;
use function iterator_to_array;
use function mkdir;
use function strnatcasecmp;
use function symlink;
use function usort;

/**
 * @group local
 */
class LocalFilesystemAdapterTest extends FilesystemAdapterTestCase
{
    public const ROOT = __DIR__ . '/test-root';

protected function setUp(): void
    {
        reset_function_mocks();
        delete_directory(static::ROOT);
    }

protected function tearDown(): void
    {
        reset_function_mocks();
        delete_directory(static::ROOT);
    }

/**
     * @test
     */
    public function creating_a_local_filesystem_creates_a_root_directory(): void
    {
        new LocalFilesystemAdapter(static::ROOT);
        $this->assertDirectoryExists(static::ROOT);
    }

/**
     * @test
     */
    public function creating_a_local_filesystem_does_not_create_a_root_directory_when_constructed_with_lazy_root_creation(): void
    {
        new LocalFilesystemAdapter(static::ROOT, lazyRootCreation: true);
        $this->assertDirectoryDoesNotExist(static::ROOT);
    }

/**
     * @test
     */
    public function not_being_able_to_create_a_root_directory_results_in_an_exception(): void
    {
        $this->expectException(UnableToCreateDirectory::class);
        new LocalFilesystemAdapter('/cannot-create/this-directory/');
    }

/**
     * @test
     *
     * @see https://github.com/thephpleague/flysystem/issues/1442
     */
    public function falling_back_to_extension_lookup_when_finding_mime_type_of_empty_file(): void
    {
        $this->givenWeHaveAnExistingFile('something.csv', '');

$mimeType = $this->adapter()->mimeType('something.csv');

self::assertEquals('text/csv', $mimeType->mimeType());
    }

/**
     * @test
     */
    public function writing_a_file(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);

$adapter->write('/file.txt', 'contents', new Config());

$this->assertFileExists(static::ROOT . '/file.txt');
        $contents = file_get_contents(static::ROOT . '/file.txt');
        $this->assertEquals('contents', $contents);
    }

/**
     * @test
     */
    public function writing_a_file_with_a_stream(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $stream = stream_with_contents('contents');

$adapter->writeStream('/file.txt', $stream, new Config());
        fclose($stream);

$this->assertFileExists(static::ROOT . '/file.txt');
        $contents = file_get_contents(static::ROOT . '/file.txt');
        $this->assertEquals('contents', $contents);
    }

/**
     * @test
     *
     * @see https://github.com/thephpleague/flysystem/issues/1606
     */
    public function deleting_a_file_during_contents_listing(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT, visibility: new class() implements VisibilityConverter {
            private VisibilityConverter $visibility;

public function __construct()
            {
                $this->visibility = new PortableVisibilityConverter();
            }

public function forFile(string $visibility): int
            {
                return $this->visibility->forFile($visibility);
            }

public function forDirectory(string $visibility): int
            {
                return $this->visibility->forDirectory($visibility);
            }

public function inverseForFile(int $visibility): string
            {
                unlink(LocalFilesystemAdapterTest::ROOT . '/file-1.txt');

return $this->visibility->inverseForFile($visibility);
            }

public function inverseForDirectory(int $visibility): string
            {
                return $this->visibility->inverseForDirectory($visibility);
            }

public function defaultForDirectories(): int
            {
                return $this->visibility->defaultForDirectories();
            }
        });
        $filesystem = new Filesystem($adapter);

$filesystem->write('/file-1.txt', 'something');
        $listing = $filesystem->listContents('/')->toArray();
        self::assertCount(0, $listing);
    }

/**
     * @test
     */
    public function writing_a_file_with_a_stream_and_visibility(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $stream = stream_with_contents('something');

$adapter->writeStream('/file.txt', $stream, new Config(['visibility' => Visibility::PRIVATE]));
        fclose($stream);

$this->assertFileContains(static::ROOT . '/file.txt', 'something');
        $this->assertFileHasPermissions(static::ROOT . '/file.txt', 0600);
    }

/**
     * @test
     */
    public function writing_a_file_with_visibility(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT, new PortableVisibilityConverter());
        $adapter->write('/file.txt', 'contents', new Config(['visibility' => 'private']));
        $this->assertFileContains(static::ROOT . '/file.txt', 'contents');
        $this->assertFileHasPermissions(static::ROOT . '/file.txt', 0600);
    }

/**
     * @test
     */
    public function failing_to_set_visibility(): void
    {
        $this->expectException(UnableToSetVisibility::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->setVisibility('/file.txt', Visibility::PUBLIC);
    }

/**
     * @test
     */
    public function failing_to_write_a_file(): void
    {
        $this->expectException(UnableToWriteFile::class);
        (new LocalFilesystemAdapter('/'))->write('/cannot-create-a-file-here', 'contents', new Config());
    }

/**
     * @test
     */
    public function failing_to_write_a_file_using_a_stream(): void
    {
        $this->expectException(UnableToWriteFile::class);
        try {
            $stream = stream_with_contents('something');
            (new LocalFilesystemAdapter('/'))->writeStream('/cannot-create-a-file-here', $stream, new Config());
        } finally {
            isset($stream) && is_resource($stream) && fclose($stream);
        }
    }

/**
     * @test
     */
    public function deleting_a_file(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        file_put_contents(static::ROOT . '/file.txt', 'contents');
        $adapter->delete('/file.txt');
        $this->assertFileDoesNotExist(static::ROOT . '/file.txt');
    }

/**
     * @test
     */
    public function deleting_a_file_that_does_not_exist(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->delete('/file.txt');
        $this->assertTrue(true);
    }

/**
     * @test
     */
    public function deleting_a_file_that_cannot_be_deleted(): void
    {
        $this->givenWeHaveAnExistingFile('here.txt');
        mock_function('unlink', false);

$this->expectException(UnableToDeleteFile::class);

$this->adapter()->delete('here.txt');
    }

/**
     * @test
     */
    public function checking_if_a_file_exists(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('/file.txt', 'contents', new Config);

$this->assertTrue($adapter->fileExists('/file.txt'));
    }

/**
     * @test
     */
    public function checking_if_a_file_exists_that_does_not_exsist(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);

$this->assertFalse($adapter->fileExists('/file.txt'));
    }

/**
     * @test
     */
    public function listing_contents(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('directory/filename.txt', 'content', new Config());
        $adapter->write('filename.txt', 'content', new Config());
        /** @var Traversable $contentListing */
        $contentListing = $adapter->listContents('/', false);
        $contents = iterator_to_array($contentListing);

$this->assertCount(2, $contents);
        $this->assertContainsOnlyInstancesOf(StorageAttributes::class, $contents);
    }

/**
     * @test
     */
    public function listing_contents_recursively(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('directory/filename.txt', 'content', new Config());
        $adapter->write('filename.txt', 'content', new Config());
        /** @var Traversable $contentListing */
        $contentListing = $adapter->listContents('/', true);
        $contents = iterator_to_array($contentListing);

$this->assertCount(3, $contents);
        $this->assertContainsOnlyInstancesOf(StorageAttributes::class, $contents);
    }

/**
     * @test
     */
    public function listing_a_non_existing_directory(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        /** @var Traversable $contentListing */
        $contentListing = $adapter->listContents('/directory/', false);
        $contents = iterator_to_array($contentListing);

$this->assertCount(0, $contents);
    }

/**
     * @test
     */
    public function listing_directory_contents_with_link_skipping(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT, null, LOCK_EX, LocalFilesystemAdapter::SKIP_LINKS);
        $adapter->write('/file.txt', 'content', new Config());
        symlink(static::ROOT . '/file.txt', static::ROOT . '/link.txt');

/** @var Traversable $contentListing */
        $contentListing = $adapter->listContents('/', true);
        $contents = iterator_to_array($contentListing);

$this->assertCount(1, $contents);
    }

/**
     * @test
     */
    public function listing_directory_contents_with_disallowing_links(): void
    {
        $this->expectException(SymbolicLinkEncountered::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT, null, LOCK_EX, LocalFilesystemAdapter::DISALLOW_LINKS);
        file_put_contents(static::ROOT . '/file.txt', 'content');
        symlink(static::ROOT . '/file.txt', static::ROOT . '/link.txt');

/** @var Traversable $contentListing */
        $contentListing = $adapter->listContents('/', true);
        iterator_to_array($contentListing);
    }

/**
     * @test
     */
    public function retrieving_visibility_while_listing_directory_contents(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->createDirectory('public', new Config(['visibility' => 'public']));
        $adapter->createDirectory('private', new Config(['visibility' => 'private']));
        $adapter->write('public/private.txt', 'private', new Config(['visibility' => 'private']));
        $adapter->write('private/public.txt', 'public', new Config(['visibility' => 'public']));

/** @var Traversable<StorageAttributes> $contentListing */
        $contentListing = $adapter->listContents('/', true);
        $listing = iterator_to_array($contentListing);
        usort($listing, function (StorageAttributes $a, StorageAttributes $b) {
            return strnatcasecmp($a->path(), $b->path());
        });
        /**
         * @var StorageAttributes $publicDirectoryAttributes
         * @var StorageAttributes $privateFileAttributes
         * @var StorageAttributes $privateDirectoryAttributes
         * @var StorageAttributes $publicFileAttributes
         */
        [$privateDirectoryAttributes, $publicFileAttributes, $publicDirectoryAttributes, $privateFileAttributes] = $listing;

$this->assertEquals('public', $publicDirectoryAttributes->visibility());
        $this->assertEquals('private', $privateFileAttributes->visibility());
        $this->assertEquals('private', $privateDirectoryAttributes->visibility());
        $this->assertEquals('public', $publicFileAttributes->visibility());
    }

/**
     * @test
     */
    public function deleting_a_directory(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        mkdir(static::ROOT . '/directory/subdir/', 0744, true);
        $this->assertDirectoryExists(static::ROOT . '/directory/subdir/');
        file_put_contents(static::ROOT . '/directory/subdir/file.txt', 'content');
        symlink(static::ROOT . '/directory/subdir/file.txt', static::ROOT . '/directory/subdir/link.txt');
        $adapter->deleteDirectory('directory/subdir');
        $this->assertDirectoryDoesNotExist(static::ROOT . '/directory/subdir/');
        $adapter->deleteDirectory('directory');
        $this->assertDirectoryDoesNotExist(static::ROOT . '/directory/');
    }

/**
     * @test
     */
    public function deleting_directories_with_other_directories_in_it(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('a/b/c/d/e.txt', 'contents', new Config());
        $adapter->deleteDirectory('a/b');
        $this->assertDirectoryExists(static::ROOT . '/a');
        $this->assertDirectoryDoesNotExist(static::ROOT . '/a/b');
    }

/**
     * @test
     */
    public function deleting_a_non_existing_directory(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->deleteDirectory('/non-existing-directory/');
        $this->assertTrue(true);
    }

/**
     * @test
     */
    public function not_being_able_to_delete_a_directory(): void
    {
        $this->expectException(UnableToDeleteDirectory::class);

mock_function('rmdir', false);

$adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->createDirectory('/etc/', new Config());
        $adapter->deleteDirectory('/etc/');
    }

/**
     * @test
     */
    public function not_being_able_to_delete_a_sub_directory(): void
    {
        $this->expectException(UnableToDeleteDirectory::class);

mock_function('rmdir', false);

$adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->createDirectory('/etc/subdirectory/', new Config());
        $adapter->deleteDirectory('/etc/');
    }

/**
     * @test
     */
    public function creating_a_directory(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->createDirectory('public', new Config(['visibility' => 'public']));
        $this->assertDirectoryExists(static::ROOT . '/public');
        $this->assertFileHasPermissions(static::ROOT . '/public', 0755);

$adapter->createDirectory('private', new Config(['visibility' => 'private']));
        $this->assertDirectoryExists(static::ROOT . '/private');
        $this->assertFileHasPermissions(static::ROOT . '/private', 0700);

$adapter->createDirectory('also_private', new Config(['directory_visibility' => 'private']));
        $this->assertDirectoryExists(static::ROOT . '/also_private');
        $this->assertFileHasPermissions(static::ROOT . '/also_private', 0700);
    }

/**
     * @test
     */
    public function not_being_able_to_create_a_directory(): void
    {
        $this->expectException(UnableToCreateDirectory::class);
        $adapter = new LocalFilesystemAdapter('/');
        $adapter->createDirectory('/something/', new Config());
    }

/**
     * @test
     */
    public function creating_a_directory_is_idempotent(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->createDirectory('/something/', new Config(['visibility' => 'private']));
        $this->assertFileHasPermissions(static::ROOT . '/something', 0700);
        $adapter->createDirectory('/something/', new Config(['visibility' => 'public']));
        $this->assertFileHasPermissions(static::ROOT . '/something', 0755);
    }

/**
     * @test
     */
    public function retrieving_visibility(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('public.txt', 'contents', new Config(['visibility' => 'public']));
        $this->assertEquals('public', $adapter->visibility('public.txt')->visibility());
        $adapter->write('private.txt', 'contents', new Config(['visibility' => 'private']));
        $this->assertEquals('private', $adapter->visibility('private.txt')->visibility());
    }

/**
     * @test
     */
    public function not_being_able_to_retrieve_visibility(): void
    {
        $this->expectException(UnableToRetrieveMetadata::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->visibility('something.txt');
    }

/**
     * @test
     */
    public function moving_a_file(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('first.txt', 'contents', new Config());
        $this->assertFileExists(static::ROOT . '/first.txt');
        $adapter->move('first.txt', 'second.txt', new Config());
        $this->assertFileExists(static::ROOT . '/second.txt');
        $this->assertFileDoesNotExist(static::ROOT . '/first.txt');
    }

/**
     * @test
     */
    public function moving_a_file_with_visibility(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT, new PortableVisibilityConverter());
        $adapter->write('first.txt', 'contents', new Config());
        $this->assertFileExists(static::ROOT . '/first.txt');
        $this->assertFileHasPermissions(static::ROOT . '/first.txt', 0644);
        $adapter->move('first.txt', 'second.txt', new Config(['visibility' => 'private']));
        $this->assertFileExists(static::ROOT . '/second.txt');
        $this->assertFileHasPermissions(static::ROOT . '/second.txt', 0600);
    }

/**
     * @test
     */
    public function not_being_able_to_move_a_file(): void
    {
        $this->expectException(UnableToMoveFile::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->move('first.txt', 'second.txt', new Config());
    }

/**
     * @test
     */
    public function copying_a_file(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('first.txt', 'contents', new Config());
        $adapter->copy('first.txt', 'second.txt', new Config());
        $this->assertFileExists(static::ROOT . '/second.txt');
        $this->assertFileExists(static::ROOT . '/first.txt');
    }

/**
     * @test
     */
    public function copying_a_file_with_visibility(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT, new PortableVisibilityConverter());
        $adapter->write('first.txt', 'contents', new Config());
        $adapter->copy('first.txt', 'second.txt', new Config(['visibility' => 'private']));
        $this->assertFileExists(static::ROOT . '/first.txt');
        $this->assertFileHasPermissions(static::ROOT . '/first.txt', 0644);
        $this->assertFileExists(static::ROOT . '/second.txt');
        $this->assertFileHasPermissions(static::ROOT . '/second.txt', 0600);
    }

/**
     * @test
     */
    public function copying_a_file_retaining_visibility(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT, new PortableVisibilityConverter());
        $adapter->write('first.txt', 'contents', new Config(['visibility' => 'private']));
        $adapter->copy('first.txt', 'retain.txt', new Config());
        $adapter->copy('first.txt', 'do-not-retain.txt', new Config(['retain_visibility' => false]));
        $this->assertFileExists(static::ROOT . '/first.txt');
        $this->assertFileHasPermissions(static::ROOT . '/first.txt', 0600);
        $this->assertFileExists(static::ROOT . '/retain.txt');
        $this->assertFileHasPermissions(static::ROOT . '/retain.txt', 0600);
        $this->assertFileExists(static::ROOT . '/do-not-retain.txt');
        $this->assertFileHasPermissions(static::ROOT . '/do-not-retain.txt', 0644);
    }

/**
     * @test
     */
    public function not_being_able_to_copy_a_file(): void
    {
        $this->expectException(UnableToCopyFile::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->copy('first.txt', 'second.txt', new Config());
    }

/**
     * @test
     */
    public function getting_mimetype(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write(
            'flysystem.svg',
            (string) file_get_contents(__DIR__ . '/../AdapterTestUtilities/test_files/flysystem.svg'),
            new Config()
        );
        $this->assertStringStartsWith('image/svg+xml', $adapter->mimeType('flysystem.svg')->mimeType());
    }

/**
     * @test
     */
    public function failing_to_get_the_mimetype(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write(
            'file.unknown',
            '',
            new Config()
        );

$this->expectException(UnableToRetrieveMetadata::class);

$adapter->mimeType('file.unknown');
    }

/**
     * @test
     */
    public function allowing_inconclusive_mime_type(): void
    {
        $adapter = new LocalFilesystemAdapter(
            location: static::ROOT,
            useInconclusiveMimeTypeFallback: true,
        );
        $adapter->write(
            'file.unknown',
            '',
            new Config()
        );

$this->assertEquals('application/x-empty', $adapter->mimeType('file.unknown')->mimeType());
    }

/**
     * @test
     */
    public function fetching_unknown_mime_type_of_a_file(): void
    {
        $this->useAdapter(new LocalFilesystemAdapter(self::ROOT, null, LOCK_EX, LocalFilesystemAdapter::DISALLOW_LINKS, new ExtensionMimeTypeDetector(new EmptyExtensionToMimeTypeMap())));

parent::fetching_unknown_mime_type_of_a_file();
    }

/**
     * @test
     */
    public function not_being_able_to_get_mimetype(): void
    {
        $this->expectException(UnableToRetrieveMetadata::class);
        $adapter = new LocalFilesystemAdapter(
            location: static::ROOT,
            mimeTypeDetector: new FinfoMimeTypeDetector(),
        );
        $adapter->mimeType('flysystem.svg');
    }

/**
     * @test
     */
    public function getting_last_modified(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('first.txt', 'contents', new Config());
        mock_function('filemtime', $now = time());
        $lastModified = $adapter->lastModified('first.txt')->lastModified();
        $this->assertEquals($now, $lastModified);
    }

/**
     * @test
     */
    public function not_being_able_to_get_last_modified(): void
    {
        $this->expectException(UnableToRetrieveMetadata::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->lastModified('first.txt');
    }

/**
     * @test
     */
    public function getting_file_size(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('first.txt', 'contents', new Config());
        $fileSize = $adapter->fileSize('first.txt');
        $this->assertEquals(8, $fileSize->fileSize());
    }

/**
     * @test
     */
    public function not_being_able_to_get_file_size(): void
    {
        $this->expectException(UnableToRetrieveMetadata::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->fileSize('first.txt');
    }

/**
     * @test
     */
    public function reading_a_file(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('path.txt', 'contents', new Config());
        $contents = $adapter->read('path.txt');
        $this->assertEquals('contents', $contents);
    }

/**
     * @test
     */
    public function not_being_able_to_read_a_file(): void
    {
        $this->expectException(UnableToReadFile::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->read('path.txt');
    }

/**
     * @test
     */
    public function reading_a_stream(): void
    {
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->write('path.txt', 'contents', new Config());
        $contents = $adapter->readStream('path.txt');
        $this->assertIsResource($contents);
        $fileContents = stream_get_contents($contents);
        fclose($contents);
        $this->assertEquals('contents', $fileContents);
    }

/**
     * @test
     */
    public function not_being_able_to_stream_read_a_file(): void
    {
        $this->expectException(UnableToReadFile::class);
        $adapter = new LocalFilesystemAdapter(static::ROOT);
        $adapter->readStream('path.txt');
    }

/* //////////////////////
    // These are the utils //
    ////////////////////// */

/**
     * @param string $file
     * @param int    $expectedPermissions
     */
    private function assertFileHasPermissions(string $file, int $expectedPermissions): void
    {
        clearstatcache(false, $file);
        $permissions = fileperms($file) & 0777;
        $this->assertEquals($expectedPermissions, $permissions);
    }

/**
     * @param string $file
     * @param string $expectedContents
     */
    private function assertFileContains(string $file, string $expectedContents): void
    {
        $this->assertFileExists($file);
        $contents = file_get_contents($file);
        $this->assertEquals($expectedContents, $contents);
    }

protected static function createFilesystemAdapter(): FilesystemAdapter
    {
        return new LocalFilesystemAdapter(static::ROOT);
    }

/**
     * @test
     */
    public function get_checksum_with_specified_algo(): void
    {
        /** @var LocalFilesystemAdapter $adapter */
        $adapter = $this->adapter();

$adapter->write('path.txt', 'foobar', new Config());
        $checksum = $adapter->checksum('path.txt', new Config(['checksum_algo' => 'crc32c']));

$this->assertSame('0d5f5c7f', $checksum);
    }
}

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