| // 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 int positionSync() |
| /// Synchronously gets the current byte position in the file. |
| /// Throws a FileSystemException if the operation fails. |
| /// |
| /// @description Checks that method positionSync returns the current byte |
| /// position in the file. |
| /// @author ngl@unipro.ru |
| |
| import "dart:async"; |
| import "dart:io"; |
| import "../../../Utils/expect.dart"; |
| import "../file_utils.dart"; |
| |
| main() { |
| File file = getTempFileSync(); |
| asyncStart(); |
| Future<RandomAccessFile> raFile = file.open(mode: FileMode.write); |
| raFile.then((RandomAccessFile rf) { |
| Expect.isNotNull(rf); |
| for (int i = 0; i < 10; i++) { |
| rf.writeByteSync((i + 1) & 0xff); |
| } |
| var rfPos = rf.positionSync(); |
| Expect.isTrue(rfPos is int); |
| Expect.isTrue(rfPos == 10); |
| rf.setPositionSync(3); |
| rfPos = rf.positionSync(); |
| Expect.isTrue(rfPos is int); |
| Expect.isTrue(rfPos == 3); |
| asyncEnd(); |
| rf.closeSync(); |
| }).whenComplete(() { |
| file.deleteSync(); |
| }); |
| } |