Testing your code with Pester is a great practice to pick up, but where do you start? In this talk I will show you patterns that will help you apply tests to your existing code base, to make it safer to refactor and more maintainable.

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In this talk I go over multiple patterns and techniques that can be applied when adding tests to existing scripts. It’s highly practical with almost no slides and many code examples. I start from showing basic patters (such as input -> function -> mock), and then expand on them by adding custom assertions, returning objects with assertable methods, testing self-contained scripts, testing in module scope, and concluding with few practices that should be avoided.