michael@0: // map.keys(), .values(), and .entries() on an empty map produce empty iterators.
michael@0: 
michael@0: var m = Map();
michael@0: var ki = m.keys(), vi = m.values(), ei = m.entries();
michael@0: var p = Object.getPrototypeOf(ki)
michael@0: assertEq(Object.getPrototypeOf(vi), p);
michael@0: assertEq(Object.getPrototypeOf(ei), p);
michael@0: 
michael@0: for (let k of ki)
michael@0:     throw "FAIL";
michael@0: for (let v of vi)
michael@0:     throw "FAIL";
michael@0: for (let [k, v] of ei)
michael@0:     throw "FAIL";