michael@0: var n1 = Number.prototype.toFixed;
michael@0: var s1 = String.prototype.split;
michael@0: delete Number;
michael@0: delete String;
michael@0: 
michael@0: var n2 = (5).toFixed;
michael@0: var s2 = ("foo").split;
michael@0: 
michael@0: // Check enumeration doesn't resurrect deleted standard classes
michael@0: for (x in this) {}
michael@0: 
michael@0: // Ensure the prototypes are shared.
michael@0: var n3 = (5).toFixed;
michael@0: var s3 = ("foo").split;
michael@0: 
michael@0: assertEq(s1, s2);
michael@0: assertEq(s1, s3);
michael@0: assertEq(n1, n2);
michael@0: assertEq(n1, n3);