This articles show how to use it to implement a Polish notation parser in JavaScript using Test-driven Development (TDD).

A common way for children’s apps to teach letters is to have someone draw the letter, the app tracking the user’s drawing. We start with this concept and implement piecewise. Along the way, we use unit tests, SwiftCheck, Cocoapods, fastlane, and CI providers to improve the project.

This article describes the configuration management tool Ansible and some of its basic concepts. Then it discusses how to test Ansible code. Refer to the version chart below. It assumes familiarity with the concept of configuration management, programming, and testing.