How to Synchronize
In our current implementation, the debit and credit transactions are processed synchronously by our simplistic Account class:
| support_code/18/lib/nice_bank.rb | |
| | class Account |
| | def credit(amount) |
| | @balance = amount |
| | end |
| | |
| | def balance |
| | @balance |
| | end |
| | |
| | def debit(amount) |
| | @balance -= amount |
| | end |
| | end |
This implementation, where the balance is updated during the method call to credit or debit, means that we can be certain the balance will have been updated by the time Cucumber checks the account balance in the final Then step of our scenario.
| support_code/18/features/cash_withdrawal.feature | |
| | Feature: Cash Withdrawal |
| | Scenario: Successful withdrawal from an account in credit |
| | Given my account ... |
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