public void GetAllBankAccounts_Test()
{
//IRepository<IBankAccount, int> repository = new BankAccountRepository();
BankAccountController mgr = new BankAccountController(repository);
ICustomer customer1 = new Customer(1, "Name", "Address", "Phone", "Email");
ICustomer customer2 = new Customer(2, "Name", "Address", "Phone", "Email");
IBankAccount account1 = mgr.CreateNewBankAccount(customer1);
IBankAccount account2 = mgr.CreateNewBankAccount(customer2);
IList <IBankAccount> returned = mgr.GetAllBankAccounts();
Assert.AreEqual(2, returned.Count);
Assert.AreSame(account1, returned[0]);
Assert.AreSame(account2, returned[1]);
}