// 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 Stream<T> where(bool test(T event))
/// Creates a new stream from this stream that discards some data events.
/// The new stream sends the same error and done events as this stream, but it only
/// sends the data events that satisfy the test. 
/// @description Checks that the new stream sends the same error and done events as this stream.
/// @author kaigorodov

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

void check(Iterable data, bool test(event)) {
  Stream s = IsolateStream.fromIterable(data)
      .map((x) => x % 2 == 0 ? x : throw new ArgumentError(x))
      .asBroadcastStream();

  Sync2 sync = new Sync2((err1, err2) {
    Expect.listEquals(err1, err2);
  });

  asyncStart();
  s.listen((var value) {}, onError: (error) {
    sync.put1(error);
  }, onDone: () {
    asyncEnd();
  });
  asyncStart();
  s.where(test).listen((var value) {}, onError: (error) {
    sync.put1(error);
  }, onDone: () {
    asyncEnd();
  });
}

main() {
  check(new Iterable.generate(10, (int index) => index), (event) => true);
}