mirror of https://github.com/tc39/test262.git
42 lines
1.1 KiB
JavaScript
42 lines
1.1 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-delete-p
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description: >
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If "deleteProperty" trap is null or undefined, [[Delete]] call is
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properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
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info: |
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[[Delete]] ( P )
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[...]
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5. Let target be O.[[ProxyTarget]].
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6. Let trap be ? GetMethod(handler, "deleteProperty").
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7. If trap is undefined, then
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a. Return ? target.[[Delete]](P).
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features: [Proxy, Reflect]
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---*/
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var stringTarget = new Proxy(new String("str"), {});
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var stringProxy = new Proxy(stringTarget, {
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deleteProperty: null,
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});
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assert(!Reflect.deleteProperty(stringProxy, "length"));
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assert.throws(TypeError, function() {
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"use strict";
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delete stringProxy[0];
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});
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var regExpTarget = new Proxy(/(?:)/g, {});
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var regExpProxy = new Proxy(regExpTarget, {
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deleteProperty: null,
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});
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assert(delete regExpProxy.foo);
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assert.throws(TypeError, function() {
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"use strict";
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delete regExpProxy.lastIndex;
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});
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