org\bovigo\vfs\vfsStream::copyFromFileSystem PHP 메소드

    public static function copyFromFileSystem($path, vfsStreamDirectory $baseDir = null, $maxFileSize = 1048576)
    {
        if (null === $baseDir) {
            $baseDir = vfsStreamWrapper::getRoot();
        }
        if (null === $baseDir) {
            throw new \InvalidArgumentException('No baseDir given and no root directory set.');
        }
        $dir = new \DirectoryIterator($path);
        foreach ($dir as $fileinfo) {
            switch (filetype($fileinfo->getPathname())) {
                case 'file':
                    if ($fileinfo->getSize() <= $maxFileSize) {
                        $content = file_get_contents($fileinfo->getPathname());
                    } else {
                        $content = new LargeFileContent($fileinfo->getSize());
                    }
                    self::newFile($fileinfo->getFilename(), octdec(substr(sprintf('%o', $fileinfo->getPerms()), -4)))->withContent($content)->at($baseDir);
                    break;
                case 'dir':
                    if (!$fileinfo->isDot()) {
                        self::copyFromFileSystem($fileinfo->getPathname(), self::newDirectory($fileinfo->getFilename(), octdec(substr(sprintf('%o', $fileinfo->getPerms()), -4)))->at($baseDir), $maxFileSize);
                    }
                    break;
                case 'block':
                    self::newBlock($fileinfo->getFilename(), octdec(substr(sprintf('%o', $fileinfo->getPerms()), -4)))->at($baseDir);
                    break;
            }
        }
        return $baseDir;
    }

 /**
  * Set up for each test
  */
 public function setUp()
 {
     // setup
     $this->root = vfsStream::setup('assets');
     // Copy directory structure from file system
     vfsStream::copyFromFileSystem(__DIR__ . '/assets');
 }