LibTest/async/StreamTransformer/bind_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 abstract Stream<T> bind(Stream<S> stream)
 * @description Checks that transformer.bind(stream) is equivalent to
 * stream.transform(transformer)
 * @author ilya
 */
import "dart:async";
import "../../../Utils/expect.dart";

main() {
  Stream s = new Stream.fromIterable([1, 2, 3, 4, 5]);

  // odd numbers as data events, even numbers as error events
  s = s.map((x) => x.isOdd ? x : throw x);

  StreamTransformer tr =
      new StreamTransformer.fromHandlers(handleData: (x, sink) {
    sink.add(x);
  }, handleError: (x, st, sink) {
    sink.add(x);
  }, handleDone: (sink) {
    sink.add(6);
    sink.add(7);
    sink.close();
  });

  asyncStart();
  tr.bind(s).toList().then((x) {
    Expect.listEquals([1, 2, 3, 4, 5, 6, 7], x);
    asyncEnd();
  });
}