blob: 58c7ad33134612acaf3551af18bdb8ae85e9146d [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 setPositionSync(int position)
/// Synchronously sets the byte position in the file.
///
/// Throws a FileSystemException if the operation fails.
/// @description Checks that method setPositionSync synchronously sets the byte
/// position in the file.
/// @author ngl@unipro.ru
import "dart:async";
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";
void check(int num) {
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);
}
rf.setPositionSync(num);
int byte = rf.readByteSync();
Expect.equals((num + 1) & 0xff, byte);
asyncEnd();
rf.closeSync();
}).whenComplete(() {
file.deleteSync();
});
}
main() {
for (int i = 0; i < 10; i++) {
check(i);
}
}