EAN: 9781484292464

BUILD YOUR OWN TEST FRAMEWORK - DANIEL IRVINE K...

Learn to write better automated tests that will dramatically increase your productivity and
have fun while doing so. This book is a build-your-own adventure designed for individual
reading and for collaborative workshops. You will build an xUnit automated test framework using
JavaScript: initially a clone of Jest  but adding a couple of neat features borrowed from RSpec
the genre-defining tool for behavior-driven development (BDD). Along the way  you will explore
the philosophy behind automated testing best practices. The automated test runner is one of the
most important innovations within software engineering. But for many programmers  automated
testing remains a mystery  and knowing how to write good tests is akin to sorcery. As the
chapters of this book unfold  you will see how the humble test runner is an elegant and simple
piece of software. Each chapter picks a single feature to build  like the it function or the
beforeEach block. It picks apart the theory of why the feature needs to exist  and how to use
it effectively in your own test suites. Every chapter ends with a set of ideas for extension
points should you wish to explore further  alone or in groups. The book culminates in an
implementation of test doubles and mocks-one of the most difficult and misunderstood concepts
within automated testing. By the end of the book  you will have gained a solid understanding of
automated testing principles that you can immediately apply to your work projects. What You'll
Learn Build an xUnit automated test framework See how an automated test runner works Understand
the best practices for automated unit testing Effectively use test doubles and mocks Who This
Book Is For Software developers with JavaScript experience who are seeking to master the art of
automated testing.

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