public void GetBankAccounts_ShouldReturnBankAccounts()
{
var context = serviceProvider.GetRequiredService <DataContext>();
var controller = new BankAccountsController(context);
context.BankAccount.Add(bankAccount1);
context.BankAccount.Add(bankAccount2);
var bankAccounts = controller.GetBankAccounts().Value.ToList();
Assert.Equal(bankAccount1, bankAccounts[0]);
Assert.Equal(bankAccount2, bankAccounts[1]);
}