35 lines
1.0 KiB
JavaScript
35 lines
1.0 KiB
JavaScript
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// Copyright 2019 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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let target = {0:42, a:42};
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let proxy = new Proxy(target, {
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has: function() { return false; },
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});
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Object.preventExtensions(target);
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function testLookupElementInProxy() {
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0 in proxy;
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}
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// 9.5.7 [[HasProperty]] 9. states that if the trap returns false, and the
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// target hasOwnProperty, and the target is non-extensible, throw a type error.
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assertThrows(testLookupElementInProxy, TypeError);
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assertThrows(testLookupElementInProxy, TypeError);
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%OptimizeFunctionOnNextCall(testLookupElementInProxy);
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assertThrows(testLookupElementInProxy, TypeError);
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function testLookupPropertyInProxy(){
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"a" in proxy;
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}
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assertThrows(testLookupPropertyInProxy, TypeError);
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assertThrows(testLookupPropertyInProxy, TypeError);
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%OptimizeFunctionOnNextCall(testLookupPropertyInProxy);
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assertThrows(testLookupPropertyInProxy, TypeError);
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