LibTest/isolate/ReceivePort/first_A01_t01.dart

// 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<T> first
 * Returns the first element of the stream.
 * @description Checks that the first element is returned.
 * @author kaigorodov
 */
import "dart:async";
import "../../../Utils/expect.dart";
import "IsolateStream.dart" as IsolateStream;

const VAL = 123;

void check(Stream s) {
  asyncStart();
  s.first.then((value) {
    Expect.equals(VAL, value);
    asyncEnd();
  });
}

main() {
  check(IsolateStream.fromIterable([VAL, 2, 3]));
  check(
      IsolateStream.fromIterable(new Iterable.generate(1, (int index) => VAL)));
}