// generator-test

function fibonacci(){
  var fn1 = 1;
  var fn2 = 1;
  while (1){
    var current = fn2;
    fn2 = fn1;
    fn1 = fn1 + current;
    var reset = yield current;
    if (reset){
        fn1 = 1;
        fn2 = 1;
    }
  }
}

var generator = fibonacci();

generator.next(); // 1
generator.next(); // 1
generator.next(); // 2
generator.next(); // 3
generator.next(); // 5


result = generator.next() == 8 && generator.send(true) == 1;