LibTest/io/File/rename_A02_t01.dart

// 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<File> rename(String newPath)
/// Renames this file. Returns a Future<File> that completes with a File instance
/// for the renamed file.
///
/// If newPath identifies an existing file, that file is replaced. If newPath
/// identifies an existing directory, the operation fails and the future
/// completes with an exception.
/// @description Checks that if newPath identifies an existing file, that file is
/// replaced
/// @author sgrekhov@unipro.ru

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

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

_main(Directory sandbox) async {
  File file = getTempFileSync(parent: sandbox);
  File target = getTempFileSync(parent: sandbox);
  file.writeAsStringSync("Source");
  target.writeAsStringSync("Target");

  asyncStart();
  await file.rename(target.path).then((renamed) {
    Expect.equals(target.path, renamed.path);
    Expect.isTrue(renamed.existsSync());
    Expect.equals("Source", renamed.readAsStringSync());
    Expect.isFalse(file.existsSync());
    asyncEnd();
  });
}