public void Interest()
{
var account = new CashAccount();
account.InterestPaid(new Date(2000, 01, 01), 100.00m, "test");
var result = account.Transactions.ToArray();
result.Should().BeEquivalentTo(new[]
{
new { Date = new Date(2000, 01, 01), Description = "test", Amount = 100.00m, Type = BankAccountTransactionType.Interest, Balance = 100.00m }
});
}