testDirectProxySet3.js (496B)
1 load(libdir + "asserts.js"); 2 3 // Throw a TypeError if the trap sets a non-writable, non-configurable property 4 for (var key of ['foo', Symbol.for('quux')]) { 5 var target = {}; 6 Object.defineProperty(target, key, { 7 value: 'bar', 8 writable: false, 9 configurable: false 10 }); 11 var handler = { set: () => true }; 12 for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy]) 13 assertThrowsInstanceOf(() => p[key] = 'baz', TypeError); 14 }