using System;



using FluentAssertions;



using Machine.Specifications;



namespace Example.CustomDelegates

{

  [Subject(typeof(Account), "Funds transfer")]

  public class when_transferring_between_two_accounts

  {

    static Account fromAccount;

    static Account toAccount;



    Given accounts = () =>

    {

      fromAccount = new Account {Balance = 1m};

      toAccount = new Account {Balance = 1m};

    };



    When transfer_is_made =

      () => fromAccount.Transfer(1m, toAccount);



    Then should_debit_the_from_account_by_the_amount_transferred =

      () => fromAccount.Balance.Should().Be(0m);



    Then should_credit_the_to_account_by_the_amount_transferred =

      () => toAccount.Balance.Should().Be(2m);

  }



  [Subject(typeof(Account), "Funds transfer")]

  public class when_transferring_an_amount_larger_than_the_balance_of_the_from_account

  {

    static Account fromAccount;

    static Account toAccount;

    static Exception exception;



    Given accounts = () =>

    {

      fromAccount = new Account {Balance = 1m};

      toAccount = new Account {Balance = 1m};

    };



    Because transfer_is_made =

      () => exception = Catch.Exception(() => fromAccount.Transfer(2m, toAccount));



    Then should_not_allow_the_transfer =

      () => exception.Should().BeOfType<Exception>();

  }

}