The Tor Browser / file revision

 // |jit-test|

 // vim: set ts=8 sts=4 et sw=4 tw=99:

 function assertObjectsEqual(obj1, obj2) {

     assertEq(obj1.a, obj2.a);

     assertEq(obj1.b, obj2.b);

     assertEq(obj1.c, obj2.c);

     assertEq(obj1.d, obj2.d);

     assertEq(obj2.a, 1);

     assertEq(obj2.b, "bee");

     assertEq(obj2.c, "crab");

     assertEq(obj2.d, 12);

 }

 function forName(obj) {

     eval('');

     var r = { };

     for (x in obj)

         r[x] = obj[x];

     return r;

 }

 function forGlobalName(obj) {

     var r = { };

     for (x in obj)

         r[x] = obj[x];

     return r;

 }

 function forProp(obj) {

     var r = { };

     var c = { };

     for (c.x in obj)

         r[c.x] = obj[c.x];

     return r;

 }

 function forElem(obj, x) {

     var r = { };

     var c = { };

     for (c[x] in obj)

         r[c[x]] = obj[c[x]];

     return r;

 }

 function forLocal(obj) {

     var r = { };

     for (var x in obj)

         r[x] = obj[x];

     return r;

 }

 function forArg(obj, x) {

     var r = { };

     for (x in obj)

         r[x] = obj[x];

     return r;

 }

 var obj = { a: 1, b: "bee", c: "crab", d: 12 };

 assertObjectsEqual(obj, forName(obj));

 assertObjectsEqual(obj, forGlobalName(obj));

 assertObjectsEqual(obj, forProp(obj));

 assertObjectsEqual(obj, forElem(obj, "v"));

 assertObjectsEqual(obj, forLocal(obj));

 assertObjectsEqual(obj, forArg(obj));