// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

/// @assertion Future<Link> create(
///  String target, {
///  bool recursive: false
///  })
/// Creates a symbolic link. Returns a Future<Link> that completes with the link
/// when it has been created. If the link exists, the future will complete with
/// an error.
///
/// If recursive is false, the default, the link is created only if all
/// directories in its path exist. If recursive is true, all non-existing path
/// components are created. The directories in the path of target are not
/// affected, unless they are also in path.
///
/// On the Windows platform, this will only work with directories, and the target
/// directory must exist. The link will be created as a Junction. Only absolute
/// links will be created, and relative paths to the target will be converted to
/// absolute paths by joining them with the path of the directory the link is
/// contained in.
///
/// On other platforms, the posix symlink() call is used to make a symbolic link
/// containing the string target. If target is a relative path, it will be
/// interpreted relative to the directory containing the link.
/// @description Checks that on non-Windows platforms only absolute links will be
/// created, and relative paths to the target will be interpreted relative to the
/// directory containing the link.
/// @author sgrekhov@unipro.ru

import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";

main() async {
  await inSandbox(_main);
}

_main(Directory sandbox) async {
  if (!Platform.isWindows) {
    Directory dir = getTempDirectorySync(parent: sandbox);
    String dirName = getTempDirectoryName();
    Directory target = new Directory(dir.path +
        Platform.pathSeparator + dirName);
    target.createSync();
    Link link = new Link(dir.path + Platform.pathSeparator +
        getTempFileName(extension: "lnk"));
    asyncStart();
    await link.create(dirName).then((Link created) {
      Expect.equals(dirName, created.targetSync());
      asyncEnd();
    });
  }
}