blob: 8bfd16838931ff7c8657ef0a6bb1d3b2c1d6f1a6 [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<int> readInto(List<int> buffer, [int start = 0, int end])
/// Reads into an existing List<int> from the file. If start is present, the
/// bytes will be filled into buffer from at index start, otherwise index 0. If
/// end is present, the end - start bytes will be read into buffer, otherwise up
/// to buffer.length. If end == start nothing happens.
///
/// @description Checks that method readInto reads into an existing List<int>
/// from the file, and if start is set the bytes are filled into buffer at index
/// start.
/// @author ngl@unipro.ru
import "dart:async";
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";
check(int start) {
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);
}
List<int> list = new List<int>(20);
rf.setPositionSync(0);
var num = rf.readInto(list, start);
Expect.isTrue(num is Future<int>);
num.then((int n) {
Expect.isTrue(n is int);
for (int i = 0; i < n; i++) {
Expect.equals((i + 1) & 0xff, list[start + i]);
}
asyncEnd();
}).whenComplete(() {
rf.closeSync();
file.deleteSync();
});
});
}
main() {
for (int i = 0; i <= 10; i++) {
check(i);
}
}