| /* |
| * 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 int writeByteSync(int value) |
| * Synchronously writes a single byte to the file. Returns the number of bytes |
| * successfully written. |
| * |
| * Throws a FileSystemException if the operation fails. |
| * |
| * @description Checks that method writeByteSync throws a FileSystemException if |
| * the operation fails. |
| * @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.equals(0, file.lengthSync()); |
| var n = rf.writeByteSync(0); |
| Expect.isTrue(n is int); |
| Expect.equals(1, n); |
| Expect.equals(1, rf.lengthSync()); |
| rf.closeSync(); |
| try { |
| n = rf.writeByteSync(1); |
| Expect.fail("should not be here."); |
| } on Exception catch (e) { |
| Expect.isTrue(e is FileSystemException); |
| } |
| asyncEnd(); |
| }).whenComplete(() { |
| file.deleteSync(); |
| }); |
| } |