blob: 21b01be9c34d545a55938e0362f34e9670b85f00 [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 throws a FileSystemException
/// if the operation fails.
/// @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);
}
rf.setPositionSync(0);
int byte = rf.readByteSync();
Expect.equals((1), byte);
rf.closeSync();
try {
rf.setPositionSync(0);
Expect.fail("should not be here");
} on Exception catch (e) {
Expect.isTrue(e is FileSystemException);
}
asyncEnd();
}).whenComplete(() {
file.deleteSync();
});
}