blob: 15a387c4166ba1c27936c22a7c749c31a59e3235 [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 Future<RandomAccessFile> writeByte(int value)
/// Writes a single byte to the file. Returns a Future<RandomAccessFile> that
/// completes with this RandomAccessFile when the write completes.
///
/// @description Checks that method writeByte writes a single byte to the file
/// and returns Future<RandomAccessFile> that completes with this
/// RandomAccessFile when the write completes.
/// @author ngl@unipro.ru
import "dart:async";
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";
void check(int num, List<int> list) {
File file = getTempFileSync();
asyncStart();
Future<RandomAccessFile> raFile = file.open(mode: FileMode.write);
raFile.then((RandomAccessFile rf) {
Expect.equals(0, file.lengthSync());
var f = rf.writeByte(num);
Expect.isTrue(f is Future<RandomAccessFile>);
f.then((RandomAccessFile file) {
Expect.equals(rf, file);
Expect.equals(1, file.lengthSync());
rf.setPositionSync(0);
file.readIntoSync(list, num);
for (int i = 0; i <= num; i++) {
Expect.equals(i, list[i]);
}
for (int i = num + 1; i < 10; i++) {
Expect.equals(0, list[i]);
}
asyncEnd();
}).whenComplete(() {
rf.closeSync();
file.deleteSync();
});
});
}
main() {
List<int> list = new List<int>.filled(10, 0);
for (int i = 0; i < 10; i++) {
check(i, list);
}
}