A small Bank acct programme using Ruby and TDD to demonstrate process

Approach

I decided that this implementation would require 3 classes

• BankAccount class - to handle the deposits, withdrawals and then store the transactions to the statement.
• Transaction class - to create a transaction class with type, amount, current balance & time attributes that are passed by the account to the statement class.
• Statement class - stores the transactions and prints statement.

Specification

Requirements

• You should be able to interact with your code via a REPL like IRB or the JavaScript console. (You don't need to implement a command line interface that takes input from STDIN.)
• Deposits, withdrawal.
• Account statement (date, amount, balance) printing.
• Data can be kept in memory (it doesn't need to be stored to a database or anything).

Acceptance criteria

Given a client makes a deposit of 1000 on 10-01-2023
And a deposit of 2000 on 13-01-2023
And a withdrawal of 500 on 14-01-2023
When she prints her bank statement
Then she would see

date || credit || debit || balance
14/01/2023 || || 500.00 || 2500.00
13/01/2023 || 2000.00 || || 3000.00
10/01/2023 || 1000.00 || || 1000.00

USER STORIES 

As a user 
I would like to open a bank acct
So I can manage my money

As a user 
I would like to able to make deposits
So I can save money 

As a user 
I would like to be able to make withdrawals from my acct
So I can spend money

As a user 
I would like to be able to to see a statement of my acct
So I can manage my money

As a user 
so I can keep track of my finances 
I want to be able to see credits with dates on my statement

As a user 
so I can keep track of my finances 
I want to be able to see debits with dates on my statement

As a user 
so I can keep track of my finances 
I want to be able to see a balance on my statement

How to run

Clone following repo and bundle

git clone https://github.com/bdowsett/bank_acct.git

bundle

Launch irb in terminal

irb
require './lib/bank_account'
account = BankAccount.new
account.deposit(1000)
account.deposit(2000)
account.withdraw(500)
account.statement.print

Output

date || credit || debit || balance
01/05/2022 || || 500.00 || 2500.00
01/05/2022 || 2000.00 || || 3000.00
01/05/2022 || 1000.00 || || 1000.00

Screenshot