blob: 290436c13cd111dd107c2229434df8aee5e27f4a [file] [log] [blame]
// 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<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 method unlock returns Future<RandomAccessFile> that
/// completes with this RandomAccessFile.
/// @author ngl@unipro.ru
import "dart:async";
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";
check(FileLock lock) {
File file = getTempFileSync();
var rf = file.openSync(mode: FileMode.write);
file.writeAsBytesSync(new List.filled(10, 0));
asyncStart();
rf.lockSync(lock);
var rfUnlock = rf.unlock();
Expect.isTrue(rfUnlock is Future<RandomAccessFile>);
rfUnlock.then((RandomAccessFile f) {
Expect.isTrue(rf is RandomAccessFile);
Expect.isTrue(rf == f);
}).whenComplete(() {
asyncEnd();
rf.closeSync();
file.deleteSync();
});
}
main() {
check(FileLock.shared);
check(FileLock.exclusive);
check(FileLock.blockingShared);
check(FileLock.blockingExclusive);
}