def symlink = new File(baseDir, "symlink")
            def symlinked = new File(baseDir, "symlinked")
            def fileCollection = $code

            assert fileCollection.contains(file)
            assert fileCollection.contains(symlink)
            assert fileCollection.contains(symlinked)
            assert fileCollection.files == [file, symlink, symlinked] as Set

        ] as Set
    }

    @Requires(UnitTestPreconditions.Symlinks)
    def "symlinked directories in tree are marked as accessed via symlink"() {
        def rootDir = tmpDir.createDir("root")
        def linkTarget = tmpDir.createDir("linkTarget")
        linkTarget.file("other/text.txt").text = "text"
        def symlink = rootDir.file("some/sub/dir")
        symlink.createLink(linkTarget)

        when:

//
// The visible files in this volume are symlinks to files in the writer's data
// directory.  Actual files are stored in a hidden timestamped directory which
// is symlinked to by the data directory. The timestamped directory and
// data directory symlink are created in the writer's target dir.  This scheme
// allows the files to be atomically updated by changing the target of the
// data directory symlink.
//

        linked.assertIsEmptyDir()
        Files.readSymbolicLink(target.toPath()) == linked.toPath()
        content.assertDoesNotExist()
    }

    @Requires(UnitTestPreconditions.Symlinks)
    def "recreates target directory when symlink is found, leaving linked content untouched"() {
        def linked = tmpDir.createDir("linked")
        def content = linked.createFile("content.txt")

	return nil
}

// SafeMakeDir makes sure that the created directory does not escape given base directory mis-using symlinks.
func (sp *subpath) SafeMakeDir(subdir string, base string, perm os.FileMode) error {
	realBase, err := evalSymlink(base)
	if err != nil {
		return fmt.Errorf("error resolving symlinks in %s: %s", base, err)
	}

	realFullPath := filepath.Join(realBase, subdir)

		return &LinkError{"link", oldname, newname, err}
	}
	return nil
}

// Symlink creates newname as a symbolic link to oldname.
// On Windows, a symlink to a non-existent oldname creates a file symlink;
// if oldname is later created as a directory the symlink will not work.
// If there is an error, it will be of type *LinkError.
func Symlink(oldname, newname string) error {
	// '/' does not work in link's content

		}
		var wantType fs.FileMode
		if test.isMountPoint && winsymlink.Value() != "0" {
			// Mount points are reparse points, and we no longer treat them as symlinks.
			wantType = fs.ModeIrregular
		} else {
			// This is either a real symlink, or a mount point treated as a symlink.
			wantType = fs.ModeSymlink
		}
		if tp := fi2.Mode().Type(); tp != wantType {
			t.Errorf("Lstat(%q) is type %v; want %v", link, tp, wantType)
		}

	// that refer to directories, such as symlinks and mount points.
	// However, we follow symlink POSIX semantics and do not set the mode bits.
	// This allows users to walk directories without following links
	// by just calling "fi, err := os.Lstat(name); err == nil && fi.IsDir()".
	// Note that POSIX only defines the semantics for symlinks, not for
	// mount points or other surrogate reparse points, but we treat them

	// Create "link" in the current working directory as a symlink to an arbitrary
	// absolute path. On macOS, this path is likely to begin with a symlink
	// itself: generally either in /var (symlinked to "private/var") or /tmp
	// (symlinked to "private/tmp").
	if err := os.Symlink(tmpDir, "link"); err != nil {
		t.Fatal(err)
	}
	t.Logf(`os.Symlink(%q, "link")`, tmpDir)

	p, err := filepath.EvalSymlinks("link")

        this.collector = collector;
    }

    /**
     * Snapshots a directory, reusing existing previously known snapshots.
     *
     * Follows symlinks and includes them in the returned snapshot.
     * Snapshots of followed symlinks are marked with {@link AccessType#VIA_SYMLINK}.
     *
     * @param absolutePath The absolute path of the directory to snapshot.