// Copyright (c) 2011, 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 final Future<int> length
/// Counts the elements in the stream. 
/// @description Checks that correct number of elements is returned.
/// @author kaigorodov

import "dart:async";
import "../../../Utils/expect.dart";
import "IsolateStream.dart" as IsolateStream;

check(Iterable<int?> data, int expected) {
  Stream s = IsolateStream.fromIterable(data);
  asyncStart();
  s.length.then((value) {
    Expect.equals(expected, value);
    asyncEnd();
  });
}

main() {
  check([], 0);
  check([1, 2, 3, null], 4);
  check(new Iterable.generate(0, (int index) => index * 2), 0);
  check(new Iterable.generate(10, (int index) => index * 2), 10);
}