A practice tech test from Makers Academy. I've chosen to do it with Python as it fits in with my blog which can be found at:

Clone this repo.

git clone https://github.com/noel1uk/bank-tech-test.git

To run tests you need to install Pytest. You need pip to install Pytest, to install pip:

sudo easy_install pip

pip install -U pytest

To install FreezeGun, simply:

pip install freezegun

To install Mock

pip install mock

Then type pytest in terminal

To check for coverage you need to have pytest-cov. Install it with:

pip install pytest-cov

Then type:

py.test --cov ./

https://github.com/noel1uk/bank-tech-test/blob/images/images/coverage.png?raw=true

Got into the directory and open irb or another REPL such as ipython.

It's made up of three classes:

Account

Which has has balance and history attributes. It has deposit, withdraw and save_transaction methods.

It can be used like this:

The deposit and withdraw methods use the save_transaction method to save transaction details to the history attribute.

Formatter

The Formatter class takes the account history as a parameter. It has reverse method reverses the order of the lists, the format_integer method which gives the integers two decimal places and converts them into strings. The to_string method changes the lists into strings and transforms them into strings to complete in the form requested by the project requirements.

View

The View class takes the processed_history attribute from the Formatter class object and prints it to screen.

• You can now only enter full integers.
• Some of the functionality of the Account class, the transaction history could perhaps be extracted into a class of its own.
• Some of the formatting takes place in the account class, specifically the deposit and withdraw methods both use strftime which formats the date. This would be better placed in the Formatter class
• Write tests for edge cases such as what happens when withdrawals are made when no money is in the account.
• Make a feature test that tests to whole process.

As an account holder,
I want to be able to deposit money into my account,
so that I can have somewhere to keep money.

As an account holder,
I want to be able to withdraw money from my account,
so that I can get my money back

As an account holder,
I want to be able to see any transactions I have made,
so that I can see how much money I have put in and withdrawn

As an account holder,
I want to be able to see when I have made transactions,
so that I can remind myself when I have made withdrawals and deposits

Given a client makes a deposit of 1000 on 10-01-2012
And a deposit of 2000 on 13-01-2012
And a withdrawal of 500 on 14-01-2012
When she prints her bank statement
Then she would see

date || credit || debit || balance
14/01/2012 || || 500.00 || 2500.00
13/01/2012 || 2000.00 || || 3000.00
10/01/2012 || 1000.00 || || 1000.00