class FileSystemTest

class FileSystemTest extends UnitTestCase {
    
    /**
     * @var \Drupal\Core\File\FileSystemInterface
     */
    protected $fileSystem;
    
    /**
     * The file logger channel.
     *
     * @var \Psr\Log\LoggerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $logger;
    
    /**
     * The stream wrapper manager.
     *
     * @var \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $streamWrapperManager;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $settings = new Settings([]);
        $this->streamWrapperManager = $this->createMock(StreamWrapperManagerInterface::class);
        $this->fileSystem = new FileSystem($this->streamWrapperManager, $settings);
    }
    
    /**
     * @covers ::chmod
     */
    public function testChmodFile() : void {
        vfsStream::setup('dir');
        vfsStream::create([
            'test.txt' => 'asdf',
        ]);
        $uri = 'vfs://dir/test.txt';
        $this->assertTrue($this->fileSystem
            ->chmod($uri));
        $this->assertFilePermissions(FileSystem::CHMOD_FILE, $uri);
        $this->assertTrue($this->fileSystem
            ->chmod($uri, 0444));
        $this->assertFilePermissions(0444, $uri);
    }
    
    /**
     * @covers ::chmod
     */
    public function testChmodDir() : void {
        vfsStream::setup('dir');
        vfsStream::create([
            'nested_dir' => [],
        ]);
        $uri = 'vfs://dir/nested_dir';
        $this->assertTrue($this->fileSystem
            ->chmod($uri));
        $this->assertFilePermissions(FileSystem::CHMOD_DIRECTORY, $uri);
        $this->assertTrue($this->fileSystem
            ->chmod($uri, 0444));
        $this->assertFilePermissions(0444, $uri);
    }
    
    /**
     * @covers ::chmod
     */
    public function testChmodUnsuccessful() : void {
        vfsStream::setup('dir');
        $this->assertFalse($this->fileSystem
            ->chmod('vfs://dir/test.txt'));
    }
    
    /**
     * @covers ::unlink
     */
    public function testUnlink() : void {
        vfsStream::setup('dir');
        vfsStream::create([
            'test.txt' => 'asdf',
        ]);
        $uri = 'vfs://dir/test.txt';
        $this->streamWrapperManager
            ->expects($this->once())
            ->method('isValidUri')
            ->willReturn(TRUE);
        $this->assertFileExists($uri);
        $this->fileSystem
            ->unlink($uri);
        $this->assertFileDoesNotExist($uri);
    }
    
    /**
     * @covers ::basename
     *
     * @dataProvider providerTestBasename
     */
    public function testBasename($uri, $expected, $suffix = NULL) : void {
        $this->assertSame($expected, $this->fileSystem
            ->basename($uri, $suffix));
    }
    public static function providerTestBasename() {
        $data = [];
        $data[] = [
            'public://nested/dir',
            'dir',
        ];
        $data[] = [
            'public://dir/test.txt',
            'test.txt',
        ];
        $data[] = [
            'public://dir/test.txt',
            'test',
            '.txt',
        ];
        return $data;
    }
    
    /**
     * Asserts that the file permissions of a given URI matches.
     *
     * @param int $expected_mode
     *   The expected file mode.
     * @param string $uri
     *   The URI to test.
     * @param string $message
     *   An optional error message.
     *
     * @internal
     */
    protected function assertFilePermissions(int $expected_mode, string $uri, string $message = '') : void {
        // Mask out all but the last three octets.
        $actual_mode = fileperms($uri) & 0777;
        $this->assertSame($expected_mode, $actual_mode, $message);
    }
    
    /**
     * Tests that invalid UTF-8 results in an exception.
     *
     * @covers ::createFilename
     */
    public function testInvalidUTF8() : void {
        vfsStream::setup('dir');
        // cspell:disable-next-line
        $filename = "a\xffsdf\x80€" . '.txt';
        $this->expectException(FileException::class);
        $this->expectExceptionMessage("Invalid filename '{$filename}'");
        $this->fileSystem
            ->createFilename($filename, 'vfs://dir');
    }

}