mirror of https://github.com/tc39/test262.git
48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
// Copyright (C) 2015 the V8 project authors. 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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es6id: 9.5.5
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description: >
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Throws a TypeError exception if trap result is not configurable but target
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property descriptor is undefined.
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info: >
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[[GetOwnProperty]] (P)
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...
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2. Let handler be the value of the [[ProxyHandler]] internal slot of O.
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...
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5. Let target be the value of the [[ProxyTarget]] internal slot of O.
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6. Let trap be GetMethod(handler, "getOwnPropertyDescriptor").
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...
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9. Let trapResultObj be Call(trap, handler, «target, P»).
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...
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12. Let targetDesc be target.[[GetOwnProperty]](P).
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...
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17. Let resultDesc be ToPropertyDescriptor(trapResultObj).
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...
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22. If resultDesc.[[Configurable]] is false, then
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a. If targetDesc is undefined or targetDesc.[[Configurable]] is true, then
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i. Throw a TypeError exception.
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---*/
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var target = {};
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var p = new Proxy(target, {
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getOwnPropertyDescriptor: function(t, prop) {
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var foo = {};
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Object.defineProperty(foo, "bar", {
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configurable: false,
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enumerable: true,
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value: 1
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});
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return Object.getOwnPropertyDescriptor(foo, prop);
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}
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});
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assert.throws(TypeError, function() {
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Object.getOwnPropertyDescriptor(p, "bar");
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});
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