mirror of https://github.com/tc39/test262.git
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-proxy-object-internal-methods-and-internal-slots-defineownproperty-p-desc
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description: >
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If "defineProperty" trap is null or undefined, [[DefineOwnProperty]] call
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is properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
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info: |
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[[DefineOwnProperty]] (P, Desc)
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[...]
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5. Let target be O.[[ProxyTarget]].
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6. Let trap be ? GetMethod(handler, "defineProperty").
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7. If trap is undefined, then
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a. Return ? target.[[DefineOwnProperty]](P, Desc).
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features: [Proxy, Reflect]
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---*/
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var string = new String("str");
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var stringTarget = new Proxy(string, {});
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var stringProxy = new Proxy(stringTarget, {});
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assert(Reflect.defineProperty(stringProxy, "4", {value: 4}));
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assert.sameValue(string[4], 4);
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assert.throws(TypeError, function() {
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Object.defineProperty(stringProxy, "0", {
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value: "x",
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});
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});
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Object.preventExtensions(string);
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assert(!Reflect.defineProperty(stringProxy, "foo", {value: 5}));
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var func = function() {};
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var funcTarget = new Proxy(func, {});
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var funcProxy = new Proxy(funcTarget, {});
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Object.defineProperty(funcProxy, "name", {value: "foo"});
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assert.sameValue(func.name, "foo");
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assert.throws(TypeError, function() {
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Object.defineProperty(funcProxy, "prototype", {
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set: function(_value) {},
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});
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});
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