michael@0: // Iterator.prototype.next throws if applied to a value that isn't an iterator.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: for (var v of [null, undefined, false, 0, "ponies", {}, [], this])
michael@0:     assertThrowsInstanceOf(function () { Iterator.prototype.next.call(v); }, TypeError);