LibTest/async/Stream/lastWhere_A06_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<T> lastWhere (bool test(T element),
 *     {@deprecated dynamic defaultValue(),  T orElse()})
 *
 * Finds the last element in this stream matching test.
 *
 * If this stream emits an error, the returned future is completed with that
 * error, and processing stops.
 *
 * Otherwise as firstWhere, except that the last matching element is found
 * instead of the first. That means that a non-error result cannot be provided
 * before this stream is done.
 *
 * The defaultValue parameter is deprecated, and orElse should be used instead.
 * @description Checks that if [orElse] throws error, the returned future will
 * receive this error.
 * @author a.semenov@unipro
 */
library lastWhere_A06_t01;
import "dart:async";
import "../../../Utils/expect.dart";

void test(CreateStreamFunction create) {
  Stream s = create([1,2,3]);
  AsyncExpect.error("z", s.lastWhere((e) => false, orElse:() => throw "z"));
}