Behavior-Driven Development with NBehave

/* Copyright (C) Dmitri Nesteruk */

namespace ConsoleApplication1
{
  using System;

  /// <summary>
  /// 
  /// </summary>
  public sealed class Account
  {
    private int balance;

    public int Balance
    {
      get { return balance; }
      set { balance = value; }
    }

    public void Deposit(int amount)
    {
      //if (amount <= 0)
        //throw new Exception();
      balance += amount;
    }

    public void Withdraw(int amount)
    {
      if (amount > balance)
        throw new Exception();

      balance -= amount;
    }

    public static void Transfer(Account from, Account to, int amount)
    {
      if (from == null) throw new ArgumentNullException("from");
      if (to == null) throw new ArgumentNullException("to");
      if (amount <= 0) throw new ArgumentException("Transfer amount must be positive");
      from.Withdraw(amount);
      to.Deposit(amount);
    }
  }
}