tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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testDirectProxyGetOwnPropertyDescriptor5.js (500B)

      1 load(libdir + "asserts.js");
      2 
      3 /*
      4 * Throw a TypeError if the trap reports an existing own property as
      5 * non-existent on a non-extensible object
      6 */
      7 var target = {};
      8 Object.defineProperty(target, 'foo', {
      9    configurable: true
     10 });
     11 Object.preventExtensions(target);
     12 
     13 var handler = { getOwnPropertyDescriptor: () => undefined };
     14 for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy])
     15    assertThrowsInstanceOf(() => Object.getOwnPropertyDescriptor(p, 'foo'), TypeError);