| // 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 Future<int> readByte() |
| /// Reads a byte from the file. Returns a Future<int> that completes with the |
| /// byte, or with -1 if end-of-file has been reached. |
| /// |
| /// @description Checks that method readByte returns Future<int> that completes |
| /// with -1 if end-of-file has been reached. |
| /// @author ngl@unipro.ru |
| |
| import "dart:async"; |
| import "dart:io"; |
| import "../../../Utils/expect.dart"; |
| import "../file_utils.dart"; |
| |
| main(m) { |
| 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 byte = rf.readByte(); |
| Expect.isTrue(byte is Future<int>); |
| Expect.runtimeIsType<Future<int>>(byte); |
| byte.then((int b) { |
| Expect.equals(-1, b); |
| asyncEnd(); |
| }).whenComplete(() { |
| rf.closeSync(); |
| file.deleteSync(); |
| }); |
| }); |
| } |