| // 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 synchronously writes a single |
| /// byte to the file and returns the number of bytes successfully written. |
| /// @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()); |
| List<int> list = new List<int>.filled(10, 0); |
| var n = rf.writeByteSync(0); |
| Expect.isTrue(n is int); |
| Expect.runtimeIsType<int>(n); |
| Expect.equals(1, n); |
| Expect.equals(1, rf.lengthSync()); |
| for (int i = 1; i < 10; i++) { |
| n = rf.writeByteSync(i); |
| Expect.equals(1, n); |
| Expect.equals(i + 1, rf.lengthSync()); |
| } |
| rf.setPositionSync(0); |
| rf.readIntoSync(list); |
| Expect.listEquals([0, 1, 2, 3, 4, 5, 6, 7, 8, 9], list); |
| asyncEnd(); |
| rf.closeSync(); |
| }).whenComplete(() { |
| file.deleteSync(); |
| }); |
| } |