testDirectProxyPreventExtensions3.js (310B)
1 load(libdir + "asserts.js"); 2 3 // Throw a TypeError if the trap reports an extensible object as non-extensible 4 5 var handler = { preventExtensions: () => true }; 6 for (let p of [new Proxy({}, handler), Proxy.revocable({}, handler).proxy]) 7 assertThrowsInstanceOf(() => Object.preventExtensions(p), TypeError);