| // 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 IOSink openWrite({ |
| /// FileMode mode: FileMode.write, |
| /// Encoding encoding: utf8 |
| /// }) |
| /// Creates a new independent IOSink for the file. The IOSink must be closed when |
| /// no longer used, to free system resources. |
| /// |
| /// An IOSink for a file can be opened in two modes: |
| /// |
| /// FileMode.write: truncates the file to length zero. |
| /// FileMode.append: sets the initial write position to the end of the file. |
| /// When writing strings through the returned IOSink the encoding specified using |
| /// encoding will be used. The returned IOSink has an encoding property which can |
| /// be changed after the IOSink has been created. |
| /// @description Checks that this method creates a new independent IOSink for the |
| /// file. Test WRITE_ONLY mode |
| /// @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.writeAsStringSync("UTF-8: кириллица "); |
| IOSink sink = file.openWrite(mode: FileMode.writeOnly); |
| sink.write("прекрасна"); |
| asyncStart(); |
| await sink.close().then((_) { |
| Expect.equals("прекрасна", file.readAsStringSync()); |
| asyncEnd(); |
| }); |
| } |