michael@0: var o = { 0: 1, 1: 2, 2: 3, length: 3 };
michael@0: Array.prototype.splice.call(o, 0, 1);
michael@0: 
michael@0: assertEq(o[0], 2);
michael@0: assertEq(o[1], 3);
michael@0: assertEq(Object.getOwnPropertyDescriptor(o, 2), undefined);
michael@0: assertEq("2" in o, false);
michael@0: assertEq(o.length, 2);