blob: 348e48dd37505c5d3f6c0dd53be213fa74d9e389 [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.
/// @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
import "dart:async";
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";
main() {
File file = getTempFileSync();
Future<RandomAccessFile> raFile = 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());
try {
n = rf.writeByteSync(1);"should not be here.");
} on Exception catch (e) {
Expect.isTrue(e is FileSystemException);
}).whenComplete(() {