// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-symbol.keyfor description: > Called with Symbol value that does not exist in the global symbol registry info: | 1. If Type(sym) is not Symbol, throw a TypeError exception. 2. For each element e of the GlobalSymbolRegistry List (see 19.4.2.1), a. If SameValue(e.[[Symbol]], sym) is true, return e.[[Key]]. 3. Assert: GlobalSymbolRegistry does not currently contain an entry for sym. 4. Return undefined. features: [Symbol.iterator, Symbol] ---*/ var constructed = Symbol('Symbol.iterator'); assert.sameValue(Symbol.keyFor(constructed), undefined, 'constructed symbol'); assert.sameValue( Symbol.keyFor(Symbol.iterator), undefined, 'well-known symbol' );