michael@0: // All iterators of the same collection type share their immediate prototype.
michael@0: // Those prototype objects in turn inherit directly from Iterator.prototype.
michael@0: 
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: function test(obj0, obj1) {
michael@0:     var iter0 = obj0[std_iterator](), iter1 = obj1[std_iterator]();
michael@0:     var proto = Object.getPrototypeOf(iter0);
michael@0:     assertEq(Object.getPrototypeOf(iter1), proto);
michael@0:     assertEq(Object.getPrototypeOf(proto), Iterator.prototype);
michael@0: }
michael@0: 
michael@0: test([], [1]);
michael@0: test(Map(), Map([[1, 1]]));
michael@0: test(Set(), Set([1]));