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50 lines
1.2 KiB
JavaScript
50 lines
1.2 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-set-p-v-receiver
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description: >
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If "set" trap is null or undefined, [[Set]] call is properly
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forwarded to [[ProxyTarget]] (which is also a Proxy object).
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info: |
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[[Set]] ( P, V, Receiver )
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[...]
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5. Let target be O.[[ProxyTarget]].
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6. Let trap be ? GetMethod(handler, "set").
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7. If trap is undefined, then
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a. Return ? target.[[Set]](P, V, Receiver).
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features: [Proxy, Reflect]
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includes: [compareArray.js]
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---*/
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var array = [1, 2, 3];
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var arrayTarget = new Proxy(array, {});
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var arrayProxy = new Proxy(arrayTarget, {
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set: null,
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});
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arrayProxy.length = 0;
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assert.compareArray(array, []);
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Object.preventExtensions(array);
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assert(!Reflect.set(arrayProxy, "foo", 2));
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assert.throws(TypeError, function() {
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"use strict";
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arrayProxy[0] = 3;
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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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set: null,
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});
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stringProxy[4] = 1;
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assert.sameValue(string[4], 1);
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assert(!Reflect.set(stringProxy, "0", "s"));
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assert(!Reflect.set(stringProxy, "length", 3));
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