// 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<RandomAccessFile> unlock([int start = 0, int end = -1])
/// Unlocks the file or part of the file.
///
/// Unlocks the byte range from start to end of the file, with the byte at
/// position end not included. If no arguments are specified, the full file is
/// unlocked, If only start is specified the file is unlocked from byte position
/// start to the end of the file.
///
/// @description Checks that if only start is specified the file is unlocked from
/// byte position start to the end of the file.
/// @author ngl@unipro.ru

import "dart:async";
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";
import "lock_check_1_lib.dart";

runMain() {
  if (Platform.isWindows) {
    return;
  }
  File file = getTempFileSync();
  var rf = file.openSync(mode: FileMode.write);
  rf.writeFromSync(new List.filled(30, 0));
  asyncStart();
  rf.lockSync(FileLock.exclusive, 12);
  String eScript = Platform.script.toString();
  var tests = [
    () => checkUnlocked(eScript, rf.path, 0, 12),
    () => checkLocked(eScript, rf.path, 12, 30),
    () => checkLocked(eScript, rf.path, 30, 40)
  ];
  Future.forEach(tests, (Function f) => f()).whenComplete(() {
    var rf1Unlock = rf.unlock(15);
    rf1Unlock.then((RandomAccessFile f) {
      var tests = [
        () => checkUnlocked(eScript, rf.path, 0, 12),
        () => checkLocked(eScript, rf.path, 12, 15),
        () => checkUnlocked(eScript, rf.path, 15, 50)
      ];
      Future.forEach(tests, (Function f) => f()).whenComplete(() {
        asyncEnd();
        rf.unlockSync();
        rf.closeSync();
        file.deleteSync();
      });
    });
  });
}

main(List<String> args) {
  if(args.length > 0)
    runProcess(args);
  else {
    runMain();
  }
}