mirror of https://github.com/tc39/test262.git
34 lines
920 B
JavaScript
34 lines
920 B
JavaScript
// Copyright (C) 2019 Aleksey 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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Throw a TypeError exception if trap result is true, targetDesc is configurable,
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and target is not extensible.
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info: |
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[[Delete]] (P)
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...
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13. Let extensibleTarget be ? IsExtensible(target).
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14. If extensibleTarget is false, throw a TypeError exception.
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...
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features: [Proxy, Reflect, proxy-missing-checks]
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---*/
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var trapCalls = 0;
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var p = new Proxy({prop: 1}, {
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deleteProperty: function(t, prop) {
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Object.preventExtensions(t);
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trapCalls++;
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return true;
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},
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});
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assert.throws(TypeError, function() {
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Reflect.deleteProperty(p, "prop");
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});
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assert.sameValue(trapCalls, 1);
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assert(Reflect.deleteProperty(p, "nonExistent"));
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assert.sameValue(trapCalls, 2);
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