blob: 1723f87d1e264b450ff52ad2bf832b96f63746ff [file] [log] [blame]
// Copyright (c) 2013, 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.
import 'package:async_helper/async_helper.dart';
import "package:expect/expect.dart";
import 'dart:async';
import 'catch_errors.dart';
main() {
Completer done = new Completer();
var events = [];
// Work around bug that makes scheduleMicrotask use Timers. By invoking
// `scheduleMicrotask` here we make sure that asynchronous non-timer events
// are executed before any Timer events.
scheduleMicrotask(() { });
// Test that errors are caught by nested `catchErrors`. Also uses
// `scheduleMicrotask` in the body of a Timer.
bool outerTimerRan = false;
int outerTimerCounterDelayCount = 0;
catchErrors(() {
events.add("catch error entry");
catchErrors(() {
events.add("catch error entry2"); { throw "timer error"; });
// We want this timer to run after the timer below. When the machine is
// slow we saw that the timer below was scheduled more than 50ms after
// this line. A duration of 50ms was therefore not enough to guarantee
// that this timer runs before the timer below.
// Instead of increasing the duration to a bigger amount we decided to
// verify that the other timer already ran, and reschedule if not.
// This way we could reduce the timeout (to 10ms now), while still
// allowing for more time, in case the machine is slow.
void runDelayed() {
new Timer(const Duration(milliseconds: 10),
() {
if (outerTimerRan) {
scheduleMicrotask(() { throw "scheduleMicrotask"; });
throw "delayed error";
} else if (outerTimerCounterDelayCount < 100) {
}).listen((x) {
if (x == "scheduleMicrotask") {
throw "inner done throw";
events.add("after inner"); {
outerTimerRan = true;
throw "timer outer";
throw "inner throw";
}).listen((x) {
if (x == "inner done throw") done.complete(true);
onDone: () {"Unexpected callback"); });
done.future.whenComplete(() {
// Give callbacks time to run. {
"catch error entry",
"catch error entry2",
"after inner",
"main exit",
"inner throw",
"timer error",
"timer outer",
"delayed error",
"inner done throw"
events.add("main exit");