From GDG Liverpool, 31st August 2017. https://www.meetup.com/GDG-Liverpool/events/240206929/

An attempt at the following Kata http://www.butunclebob.com/ArticleS.UncleBob.TheBowlingGameKata

trying to stick to "the rules" http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd

Some further reading...

Test-Driven Development by Example : Kent Beck

Growing Object-Oriented Software: Guided by Tests : Nat Pryce and Steve Freeman

Clean Code : Robert Martin