tor-browser

for-in.js (455B)

---

// for-in loops on Maps and Sets enumerate properties.

var test = function test(obj) {
   assertEq(Object.keys(obj).length, 0);

   var i = 0, v;
   for (v in obj)
       i++;
   assertEq(i, 0);

   obj.ownProp = 1;
   assertEq(Object.keys(obj).join(), "ownProp");

   for (v in obj)
       i++;
   assertEq(i, 1);
   assertEq(v, "ownProp");

   delete obj.ownProp;
};

test(Map.prototype);
test(new Map);
test(Set.prototype);
test(new Set);