function test() { | |
// Array.prototype.copyWithin -> Set -> [[Set]] | |
var set = []; | |
var p = new Proxy([1,2,3,4,5,6], { set: function(o, k, v) { set.push(k); o[k] = v; return true; }}); | |
p.copyWithin(0, 3); | |
return set + '' === "0,1,2"; | |
} | |
if (!test()) | |
throw new Error("Test failed"); | |