blob: 75cc5b3862c563ed63527dc689672de9c2e5dc87 [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 doWhile(FutureOr<bool> f())
/// Performs an async operation repeatedly until it returns false.
/// The function f is called repeatedly while it returns either the bool
/// value true or a Future which completes with the value true.
/// If a call to f returns false or a Future that completes to false,
/// iteration ends and the future returned by doWhile is completed.
/// @description Checks that [doWhile] handles a mix of bool and Future<bool>
/// values returned by [f].
/// @author
import "dart:async";
import "../../../Utils/expect.dart";
const int N = 10;
main() {
int num = 0;
FutureOr<bool> f() {
return (num%2==0) ? num < N : new Future.value(num < N);
(_) {
Expect.equals(N, num);