A book starter to kickstart your writing journey 🎉

TDD with Mock Objects: Design Principles and Emergent Properties (C#, JavaScript, Java, Python, Ruby)

Regular Expressions tutorial in the style of Ruby Koans, written with Javascript and Jest

Refactoring Koans to help you learn to refactor code smells in javascript

An Eclipse plugin that lets you run JavaScript to refactor your Java code

Exercise for finding tests for boundary conditions.

Hier wird's ernst :-)