Coffee Machine Kata
The original subject is provided by simcap. I haven't seen changes for years, but still internet is evolving. So I use a text copy of his subject as of November 26th 2019.
Introduction
This mini project is used to learn Test Driven Development.
Of course, in your career, you have implemented more complicated stuff than a simple coffee machine that takes orders. But to make this mini project more interesting here are simple rules you must follow:
All production code is written to make a failing test pass Do the simplest thing that could work for the current iteration
Project
In this coffee Machine Project, your task is to implement the logic (starting from a simple class) that translates orders from customers of the coffee machine to the drink maker. Your code will use the drink maker protocol to send commands to the drink maker.
Important !
You do not have to implement the coffee machine customer interface. For instance, your code could consume a simple POJO that would represent an order from a customer.
You do not have to implement the drink maker. It is only a imaginary engine that will receive messages according to the protocol. Your job is to build those messages.
Iterations
This project starts simple and will grow in added features through the iterations.
- First iteration: Making Drinks (~30 minutes)
- Second iteration: Going into business (~20 minutes)
- Third iteration: Extra hot (~20 minutes)
- Fourth iteration: Making money (~20 minutes)
- Fifth iteration: Running out (~20 minutes)
Ready ?
Requirements
Your favorite IDE or text editor A testing framework (junit, rspec, ...) A mocking framework (mockito, ...) A passion for tested code ;) Are you ready? So start the first iteration. Your product owner is waiting for you!