| // Copyright 2014 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. |
| |
| // Note: concat does not currently support species so there is no difference |
| // between [].concat(foo) and Array.prototype.concat.apply(foo). |
| |
| var getTrap = function(t, key) { |
| if (key === "length") return {[Symbol.toPrimitive]() {return 3}}; |
| if (key === "2") return "baz"; |
| if (key === "3") return "bar"; |
| }; |
| var target = []; |
| var obj = new Proxy(target, {get: getTrap, has: () => true}); |
| |
| assertEquals([undefined, undefined, "baz"], [].concat(obj)); |
| assertEquals([undefined, undefined, "baz"], Array.prototype.concat.apply(obj)) |
