n-c0de-r / gilded-rose

Gilded Rose Kata in Python

For Informatics 3 @ Media Informatics HTW Berlin

This version of the Gilded Rose Kata is an excerpt compiled from Emily Bache's repo, prepared for usage within Info3 in the International Media Informatics Bachelor at HTW Berlin.

If you look for the Gilded Rose Kata in general, go to the version published by Emily Bache or Kata-Log for a more general version.

Instructions for the Kata

You will use this Kata to Practice Work on Legacy Code by

1. Implementing Characterization Tests

and then implement the new feature using

2. Refactoring to make the hard change easy and
3. Implementing the Easy Change

Step by Step

1. Implement Characterization Tests

   a. Read the Requirements

   b. Have a look at the current source code

   c. Create Closed Box Tests based on the Requirements (the specification)

   • if you find behaviour not compliant with the specification, mark the tests with xfail as in the example.

   d. Ensure that you've written 'enough' tests by checking the test coverage

2. Refactor to make the hard change easy

   Now that you have a full test suite, you can confidently refactor the source code. Take a moment to consider which new design would make the change easy. Remember that there is one restriction though: You may not alter the Item class. Which GoF-Patterns would be useful?

3. Implement the Easy Change

   This should be easy now!

   Did your new design allow for adding the new requirement by just adding new code, without changing existing code? (Open-Closed Principle)