blob: f4f7a0b40587ecb2d2f1c6ea501651c345d01172 [file] [log] [blame]
/*
* 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<S> fold<S>(S initialValue, S combine(S previous, T element))
* Reduces a sequence of values by repeatedly applying combine.
* @description Checks that if the stream contains no elements, the combine
* method is not called and the future returns initialValue.
* @note undocumented
* @author kaigorodov
*/
library fold_A01_t02;
import "../../../Utils/expect.dart";
void test(CreateStreamFunction create) {
Object combine(Object p, var c) {
Expect.fail("should not be called");
return 0;
}
AsyncExpect.value(null, create([]).fold(null, combine));
AsyncExpect.value(777, create([]).fold(777, combine));
AsyncExpect.value("", create([]).fold("", combine));
}