Everything around Test-driven development (TDD) is a very interesting and very motivating world and besides, these are topics with a certain antiquity. So it is very easy to find related contents. But the relationship between this area and Drupal is even more interesting: there are multiple options to implement testing of different types and different orientation (Unit Test, Kernel, JavaScript, functional …) so it can be complex to introduce in this world. Today I want to take advantage of the experience of porting to Drupal 8 a small contributed module to share examples about …