This is part 3 of a series of blog posts where I walk the reader through building a real full-stack application with Rails and ES6, from beginning to end. “The Backend” part 1 and part 2 are also available online.

This post can be seen as a basic introduction to frontend test-driven development with no fancy frameworks, just ES6 and a set of simple guidelines to keep the code highly manageable. It’s a well-known cultural fact that Railers don’t usually care for frontend tests, and this post shows that with the right tools and mindset it’s not as hard as one thinks.