| // Copyright (c) 2015, 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 = 2.7 |
| |
| import "dart:async"; |
| import "package:async_helper/async_helper.dart"; |
| import "native_testing.dart"; |
| |
| typedef void Callback0(); |
| |
| @Native("A") |
| class A { |
| foo(Callback0 f) native; |
| } |
| |
| makeA() native; |
| |
| void setup() { |
| JS('', r""" |
| (function(){ |
| function A() {} |
| A.prototype.foo = function(f) { return f(); }; |
| self.makeA = function() { return new A(); }; |
| self.nativeConstructor(A); |
| })()"""); |
| applyTestExtensions(['A']); |
| } |
| |
| main() { |
| nativeTesting(); |
| setup(); |
| |
| // Makes sure that we don't run the event-loop when we have a reentrant |
| // call from JS to Dart code. |
| // We start by setting up a microtask that should only run after main has |
| // finished. We then pass a closure into JavaScript. That closure is |
| // immediately invoked. Dart2js had a bug, that it would start the event-loop |
| // at this moment (a JS->Dart transition), and execute the scheduled |
| // microtask. |
| |
| var events = []; |
| asyncStart(); |
| var a = makeA(); |
| new Future.microtask(() { |
| events.add("scheduleMicrotask"); |
| }).whenComplete(asyncEnd); |
| |
| Expect.equals(499, a.foo(() { |
| events.add("closure to foo"); |
| return 499; |
| })); |
| |
| events.add("after native call"); |
| Expect.listEquals(["closure to foo", "after native call"], events); |
| } |