js/src/jit-test/tests/proxy/testDirectProxyKeys8.js

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1 load(libdir + "asserts.js");
2
3 /*
4 * Throw a TypeError if the trap skips an existing own enumerable property on a
5 * non-extensible object
6 */
7 var target = {};
8 Object.defineProperty(target, 'foo', {
9 enumerable: true,
10 configurable: true
11 });
12 Object.preventExtensions(target);
13 var caught = false;
14 assertThrowsInstanceOf(function () {
15 Object.keys(new Proxy(target, {
16 keys: function (target) {
17 return [];
18 }
19 }));
20 }, TypeError);

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