blob: 870ae3b6811cf93f1761c28f08860f244a3fc98f [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 List<int> readSync(int bytes)
/// Synchronously reads a maximum of bytes bytes from a file and returns the
/// result in a list of bytes.
///
/// Throws a FileSystemException if the operation fails.
///
/// @description Checks that method readSync returns List<int> which contains
/// a maximum of bytes bytes from a 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(1);
var list1 = rf.readSync(num);
Expect.isTrue(list1 is List<int>);
int len = list1.length;
Expect.equals(num, len);
for (int i = 0; i < len; i++) {
Expect.isTrue(list1[i] == (i + 2) & 0xff);
}
var list2 = rf.readSync(10 - num);
Expect.isTrue(list1 is List<int>);
len = list2.length;
Expect.equals(9 - num, len);
for (int i = 0; i < len; i++) {
Expect.isTrue(list2[i] == (i + num + 2) & 0xff);
}
asyncEnd();
rf.closeSync();
}).whenComplete(() {
file.deleteSync();
});
}
main() {
for (int i = 0; i < 10; i++) {
check(i);
}
}