// 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.

/// @assertion Future<Link> create(
///  String target, {
///  bool recursive: false
///  })
/// Creates a symbolic link in the file system.
///
/// The created link will point to the path at `target`, whether that path
/// exists or not.
///
/// Returns a `Future<Link>` that completes with the link when it has been
/// created. If the link path already 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
/// parent paths are created first. The directories in the path of target are
/// not affected, unless they are also in [path].
///
/// On the Windows platform, this call will create a true symbolic link instead
/// of a junction. The link represents a file or directory and does not change
/// its type after creation. If `target` exists then the type of the link will
/// match the type `target`, otherwise a file symlink is created.
///
/// In order to create a symbolic link on Windows, Dart must be run in
/// Administrator mode or the system must have Developer Mode enabled, otherwise
/// a [FileSystemException] will be raised with `ERROR_PRIVILEGE_NOT_HELD` set
/// as the errno when this call is made.
///
/// 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 if a link with the same path exists, the future
/// will complete with an error. Test the case when created and existing links
/// have the same [Directory] as a target
/// @author sgrekhov@unipro.ru

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

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

void _main(Directory sandbox) async {
  Link tmp = getTempLinkSync(parent: sandbox);
  Link link = new Link(tmp.path);
  asyncStart();
  await link.create(tmp.targetSync()).then((Link created) {
    Expect.fail("Link create() should fail");
    asyncEnd();
  }, onError: (_) {
    asyncEnd();
  });
}