node/deps/v8/test/mjsunit/es6/promise-thenable-proxy.js
Michaël Zasso 2739185b79 deps: update V8 to 5.5.372.40
PR-URL: https://github.com/nodejs/node/pull/9618
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
2017-01-26 22:46:17 +01:00

24 lines
561 B
JavaScript

// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax
function assertAsync(b, s) {
if (!b) {
%AbortJS(" FAILED!")
}
}
var handler = {
get: function(target, name) {
if (name === 'then') {
return (val) => Promise.prototype.then.call(target, val);
}
}
};
var target = new Promise(r => r(42));
var p = new Proxy(target, handler);
Promise.resolve(p).then((val) => assertAsync(val === 42));