/// <summary>
        /// Create calculator view model with dependencies
        /// </summary>
        /// <param name="ninjaCommander"></param>
        public CalculatorViewModel(INinjaCommander ninjaCommander)
        {
            _ninjaCommander = ninjaCommander;

            Ninjas = new SelectList(_ninjaCommander.Ninjas, "Description", "Description");
            Opponents = new SelectList(_ninjaCommander.Opponents, "Description", "Description");
        }
 /// <summary>
 /// Inject ninja commander into fight controller
 /// </summary>
 /// <param name="ninjaCommander"></param>
 /// <param name="calculatorViewModel"></param>
 public FightController(INinjaCommander ninjaCommander, ICalculatorViewModel calculatorViewModel)
 {
     _ninjaCommander = ninjaCommander;
     _calculatorViewModel = calculatorViewModel;
 }