michael@0: // Iterating over a set of objects yields those exact objects.
michael@0: 
michael@0: var arr = [{}, {}, {}, [], /xyz/, new Date];
michael@0: var set = Set(arr);
michael@0: assertEq(set.size, arr.length);
michael@0: 
michael@0: var i = 0;
michael@0: for (var x of set)
michael@0:     assertEq(x, arr[i++]);
michael@0: assertEq(i, arr.length);
michael@0: