blob: 4f3c25a9e19de664f35a4f4aeb40f5ff8e8b602c [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 void truncateSync(int length)
/// Synchronously truncates (or extends) the file to length bytes.
///
/// @description Checks that method truncateSync does not change the file length
/// if length is equal to the file length.
/// @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.isNotNull(rf);
for (int i = 0; i < 10; i++) {
rf.writeByteSync((i + 1) & 0xff);
}
var len1 = rf.lengthSync();
rf.truncateSync(10);
var len2 = rf.lengthSync();
Expect.equals(10, len2);
Expect.equals(len1, len2);
asyncEnd();
rf.closeSync();
}).whenComplete(() {
file.deleteSync();
});
}