LibTest/io/RandomAccessFile/lock_A04_t02.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<RandomAccessFile> lock([
 *     FileLock mode = FileLock.exclusive,
 *     int start = 0,
 *     int end = -1
 * ])
 * . . .
 * If mode is FileLock.exclusive or FileLock.shared, an error is signaled if the
 * lock cannot be obtained. If mode is FileLock.blockingExclusive or
 * FileLock.blockingShared, the returned Future is resolved only when the lock
 * has been obtained.
 *
 * @description Checks that if mode is FileLock.exclusive, an error is signaled
 * if the lock cannot be obtained.
 * @author ngl@unipro.ru
 */
import "dart:async";
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";
import "lock_check_3_lib.dart";

void check(int fLen) {
  File file = getTempFileSync();
  asyncStart();
  var rf = file.openSync(mode: FileMode.write);
  rf.writeFromSync(new List.filled(fLen, 1));
  var rfLock = rf.lock(FileLock.exclusive);
  rfLock.then((RandomAccessFile f) {
    var tests = [
      () => checkLocked(
          Platform.script.toString(), f.path, 0, -1, FileLock.exclusive)
    ];
    Future.forEach(tests, (Function f) => f()).whenComplete(() {
      asyncEnd();
      rf.unlockSync();
      rf.closeSync();
      file.deleteSync();
    });
  });
}

runMain() {
  check(10);
  check(1000);
}

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