gistfile1.js

called = undefined;
__defineGetter__("foo",function(){return"bar";});
__defineSetter__("bar",function(bif){called = bif;});
try{
  if(foo!=="bar"){
    print("should equal bar");
  }
} catch(e) {
  print("should not have raised "+e);
}
bar = 0xdeadbeef;
if(called!==0xdeadbeef){
  print("should have been called with the right value");
}