LibTest/io/File/writeAsStringSync_A03_t06.dart

/*
 * 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.
 */
/**
 * @assertion void writeAsStringSync(
 *  String contents, {
 *  FileMode mode: FileMode.write,
 *  Encoding encoding: utf8,
 *  bool flush: false
 *  })
 * Synchronously write a string to a file.
 *
 * Opens the file, writes the string in the given encoding, and closes the file.
 *
 * By default writeAsStringSync creates the file for writing and truncates the
 * file if it already exists. In order to append the bytes to an existing file,
 * pass FileMode.append as the optional mode parameter.
 *
 * If the flush argument is set to true data written will be flushed to the file
 * system before returning.
 *
 * Throws a FileSystemException if the operation fails.
 * @description Checks that in a FileMode.writeOnly file is truncated
 * @author sgrekhov@unipro.ru
 */
import "dart:io";
import "../../../Utils/expect.dart";
import "../file_utils.dart";

main() async {
  await inSandbox(_main);
}

_main(Directory sandbox) async {
  File file = getTempFileSync(parent: sandbox);
  file.writeAsStringSync("File content");
  file.writeAsStringSync("New content", mode: FileMode.writeOnly);
  Expect.equals("New content", file.readAsStringSync());
}