LibTest/async/Stream/forEach_A01_t01.test.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 Future forEach(void action(T element))
/// Executes action on each data event of the stream.
/// Completes the returned Future when all events of the stream have been
/// processed.
/// @description Checks that all actions on each data event of the stream are
/// executed.
/// @author kaigorodov

library forEach_A01_t01;
import "dart:async";
import "../../../Utils/expect.dart";

void check<T>(Stream<T> s, List<T> data) {
  List<T> sink = [];
  asyncStart();
  s.forEach((T element) => sink.add(element)).then(
    (_) {
      Expect.listEquals(data, sink);
      asyncEnd();
    }
  );
}

void test(CreateStreamFunction create) {
  check(create([]), []);
  check(create([1, 2, 3, 4]), [1, 2, 3, 4]);
  check(create([null, "2", -3, 4.0, []]), [null, "2", -3, 4.0, []]);
}