blob: 5bfaaf3f1e4077c59e3c05423a14f59b82dd3bb2 [file] [log] [blame]
// Copyright (c) 2016, 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> distinct([bool equals(T previous, T next)])
/// The returned stream is a broadcast stream if this stream is.
/// @description Checks that the returned stream is a broadcast stream
/// if source stream is. [equals] is provided
/// @author
library distinct_A02_t02;
import "dart:async";
import "../../../Utils/expect.dart";
void check<T>(Stream<T> stream, bool equals(T previous, T next)) {
Expect.equals(stream.isBroadcast, stream.distinct(equals).isBroadcast);
void test(CreateStreamFunction create) {
check(create([]), (p,n) => true);
check(create([]).asBroadcastStream(), (p,n) => true);
check(create([]), (p,n) => false);
check(create([]).asBroadcastStream(), (p,n) => false);
check(create([1,2,3,4,5]), (p,n) => true);
check(create([1,2,3,4,5]).asBroadcastStream(), (p,n) => true);
check(create([1,2,3,4,5]), (p,n) => false);
check(create([1,2,3,4,5]).asBroadcastStream(), (p,n) => false);
check(create([1,2,3,4,5]), (p,n) => p==n);
check(create([1,2,3,4,5]).asBroadcastStream(), (p,n) => p==n);