LibTest/io/File/openRead_A01_t04.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 if file path is wrong then this operation fails
/// @author sgrekhov@unipro.ru


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

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

void _main(Directory sandbox) async {
  File f = getTempFileSync(parent: sandbox);
  f.writeAsStringSync("Test");
  String path = "!" + f.absolute.path;
  File file = new File(path);
  asyncStart();
  await file.openRead().toList().then((_) {
    Expect.fail("Exception expected");
  }, onError: (_) {
    asyncEnd();
  });
}