michael@0: var funProto = Function.prototype;
michael@0: assertEq(Object.getOwnPropertyDescriptor(funProto, "prototype"), undefined);
michael@0: 
michael@0: function Point(x, y) { this.x = x; this.y = y; }
michael@0: 
michael@0: var YAxisPoint = Point.bind(null, 0);
michael@0: 
michael@0: assertEq(YAxisPoint.prototype, undefined);
michael@0: 
michael@0: var oldPoint;
michael@0: for (var i = 0, sz = 9; i < sz; oldPoint = point, i++)
michael@0: {
michael@0:   var point = new YAxisPoint(5);
michael@0:   assertEq(point === oldPoint, false);
michael@0:   assertEq(point.x, 0);
michael@0:   assertEq(point.y, 5);
michael@0:   assertEq(Object.getOwnPropertyDescriptor(funProto, "prototype"), undefined);
michael@0:   assertEq(Object.getOwnPropertyDescriptor(YAxisPoint, "prototype"), undefined);
michael@0: }
michael@0: