Cashew-Chicken Rotini Salad

Cook pasta according to package directions. Meanwhile, in a large bowl, combine the chicken, pineapple, celery, onions, grapes and cranberries. Drain pasta and rinse in cold water; stir into chicken mixture., In a small bowl, whisk the ranch dressing and mayonnaise. Pour over salad and toss to coat. Cover and refrigerate for at least 1 hour. Just before serving, stir in cashews.