def test_get_account_balance(self):
"""test get account balance
"""
bank=TDDBank()
acc1=TDDAccount(001,50)
bank.add_account(acc1)
self.assertEqual(bank.get_account_balance(001),50)
def test_add_account(self):
"""test add account
"""
bank=TDDBank()
acc1=TDDAccount(001,50)
acc2=TDDAccount(002,100)
bank.add_account(acc1)
bank.add_account(acc2)
self.assertEqual(len(bank.accounts), 2)