blob: b5aec69957c90054cd8d7acf40bd0e8287ff8765 [file] [log] [blame]
// 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 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>(10);
var n = rf.writeByteSync(0);
Expect.isTrue(n is int);
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();
});
}