mirror of https://github.com/tc39/test262.git
53 lines
1.3 KiB
JavaScript
53 lines
1.3 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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---*/
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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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set: undefined,
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});
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assert(Reflect.set(funcProxy, "prototype", null));
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assert.sameValue(func.prototype, null);
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assert(!Reflect.set(funcProxy, "length", 2));
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assert.throws(TypeError, function() {
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"use strict";
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funcProxy.name = "foo";
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});
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var trapCalls = 0;
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var target = new Proxy({}, {
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set: function(_target, key) {
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trapCalls++;
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return key === "foo";
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},
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});
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var proxy = new Proxy(target, {
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set: undefined,
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});
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assert(Reflect.set(Object.create(proxy), "foo", 1));
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assert.sameValue(trapCalls, 1);
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assert(!Reflect.set(proxy, "bar", 2));
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assert.sameValue(trapCalls, 2);
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