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2883c855e0
PR-URL: https://github.com/nodejs/node/pull/32116 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
18 lines
701 B
JavaScript
18 lines
701 B
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Note: concat does not currently support species so there is no difference
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// between [].concat(foo) and Array.prototype.concat.apply(foo).
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var getTrap = function(t, key) {
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if (key === "length") return {[Symbol.toPrimitive]() {return 3}};
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if (key === "2") return "baz";
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if (key === "3") return "bar";
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};
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var target = [];
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var obj = new Proxy(target, {get: getTrap, has: () => true});
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assertEquals([undefined, undefined, "baz"], [].concat(obj));
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assertEquals([undefined, undefined, "baz"], Array.prototype.concat.apply(obj))
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