beca-g / bank-tech-test

Bank Tech Test

Getting started

Setup

From the command line run the following:

git clone [email protected]:beca-g/bank-tech-test.git
cd bank-tech-test

Install dependencies

bundle

To run tests

rspec

Specification

Requirements

• You should be able to interact with your code via a REPL like IRB. (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 10-01-2020
And a deposit of 2000 on 13-01-2020
And a withdrawal of 500 on 14-01-2020
When she prints her bank statement
Then she would see

date || credit || debit || balance
14/01/2020 || || 500.00 || 2500.00
13/01/2020 || 2000.00 || || 3000.00
10/01/2020 || 1000.00 || || 1000.00

User Stories

As a user  
So I can keep track of my finances  
I want to open a bank account  

As a user  
So I can store my money  
I want to be able to make deposits into my bank account  

As a user  
So I can spend my money  
I want to make withdrawals from my bank account

As a user  
So I keep track of my transactions  
I want to be able to print a statment  

As a user  
So that my bank statement is easy to read  
I want to see the newest transactions first  

My approach

I had a test driven and OOP approach to this challenge, firstly creating user stories and then carrying out a plan for the classes and structure.

Planning

• I created the user stories based on the requirements and acceptance criteria. I then planned the basic structure of the code, breaking down the user stories into classes and methods by extracting the nouns and verbs from the user stories. For readability and to simplify my code as much as possible I decided to have three classes: Account, Transaction and Statement.

Class	Attributes	Methods
Account	- balance = 0 - transactions = [ ]	- withdrawal - deposit - statement
Transaction	- date - type - amount
Statement		- print

• I then took pen to paper and diagrammed and predicted how they would work together.

Test Coverage

Running in IRB

Tech

• ruby 2.7.0
• rspec
• simple-cov
• rubocop