/* Any copyright is dedicated to the Public Domain. * http://creativecommons.org/licenses/publicdomain/ */ // ES6 does not specify enumeration order, but implementations mostly retain // property insertion order -- and must, for web compatibility. This test checks // that symbol-keyed properties do not interfere with that order. var obj = {}; obj[Symbol("moon")] = 0; obj.x = 1; obj[Symbol.for("y")] = 2 obj.y = 3; obj[Symbol.iterator] = function* () { yield 4; }; obj.z = 5; Object.prototype[Symbol.for("comet")] = 6; var keys = []; for (var k in obj) keys.push(k); assertDeepEq(keys, ["x", "y", "z"]); assertDeepEq(Object.keys(obj), ["x", "y", "z"]); // Test with more properties. for (var i = 0; i < 1000; i++) obj[Symbol(i)] = i; obj.w = 1000; keys = [] for (var k in obj) keys.push(k); assertDeepEq(keys, ["x", "y", "z", "w"]); if (typeof reportCompare === "function") reportCompare(0, 0);