blob: 37b322e70a6f966b8a34e9c5adf925d44b50d646 [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.
// @dart = 2.9
/// @assertion Future forEach(Iterable input, Future f(element))
/// Perform an async operation for each element of the iterable, in turn.
/// Runs f for each element in input in order, moving to the next element
/// only when the Future returned by f completes.
/// @description Checks that if [f] returns a not completed Future, [forEach]
/// waits for the returned Future to complete.
/// @author
import "dart:async";
import "../../../Utils/expect.dart";
void check(List input) {
List log = [];
dynamic f(element) {
return new Future.delayed(durationMs(100));
Future.forEach(input, f).then(
(_) {
Expect.listEquals(input, log);
main() {
check([0, 1, 2, 3, 4]);
check(["a", "b", "c", "d"]);
check([0, null, "a", 3.14, true, false]);