Robert Nystrom
ba40d9bece
Change-Id: I73edeeaf4934899b71d6335dcb4b4b54dce46bae Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/426340 Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Nate Biggs <natebiggs@google.com> Commit-Queue: Nate Biggs <natebiggs@google.com>
59 lines
1.4 KiB
Dart
59 lines
1.4 KiB
Dart
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "dart:async";
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import "package:expect/async_helper.dart";
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import "native_testing.dart";
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typedef void Callback0();
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@Native("A")
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class A {
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foo(Callback0 f) native;
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}
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makeA() native;
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void setup() {
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JS('', r"""
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(function(){
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function A() {}
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A.prototype.foo = function(f) { return f(); };
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self.makeA = function() { return new A(); };
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self.nativeConstructor(A);
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})()""");
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applyTestExtensions(['A']);
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}
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main() {
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nativeTesting();
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setup();
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// Makes sure that we don't run the event-loop when we have a reentrant
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// call from JS to Dart code.
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// We start by setting up a microtask that should only run after main has
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// finished. We then pass a closure into JavaScript. That closure is
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// immediately invoked. Dart2js had a bug, that it would start the event-loop
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// at this moment (a JS->Dart transition), and execute the scheduled
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// microtask.
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var events = [];
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asyncStart();
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var a = makeA();
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new Future.microtask(() {
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events.add("scheduleMicrotask");
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}).whenComplete(asyncEnd);
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Expect.equals(
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499,
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a.foo(() {
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events.add("closure to foo");
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return 499;
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}),
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);
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events.add("after native call");
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Expect.listEquals(["closure to foo", "after native call"], events);
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}
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