LibTest/io/File/openRead_A01_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 Stream<List<int>> openRead([int start, int end])
 * Create a new independent Stream for the contents of this file.
 *
 * If start is present, the file will be read from byte-offset start. Otherwise
 * from the beginning (index 0).
 *
 * If end is present, only up to byte-index end will be read. Otherwise, until
 * end of file.
 *
 * In order to make sure that system resources are freed, the stream must be
 * read to completion or the subscription on the stream must be cancelled.
 * @description Checks that this method creates a new independent Stream for the
 * contents of this file. Test  [start] argument
 * @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.writeAsBytesSync([1, 2, 3, 4]);
  asyncStart();
  await file.openRead(1).toList().then((data) {
    Expect.listEquals([[2, 3, 4]], data);
    asyncEnd();
  });
}