blob: 8af937114ba89b5a7ba595bfefa2888159712e4d [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 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 runs f repeatedly, if f returns true, and
/// returns a Future that completes once f returns false.
/// @author
import "dart:async";
import "../../../Utils/expect.dart";
const int N = 3;
main() {
int num = 0;
FutureOr<bool> f() {
return num < N;
(_) {
Expect.equals(N, num);