Book Image

Mastering Node.js - Second Edition

By : Sandro Pasquali, Kevin Faaborg
Book Image

Mastering Node.js - Second Edition

By: Sandro Pasquali, Kevin Faaborg

Overview of this book

Node.js, a modern development environment that enables developers to write server- and client-side code with JavaScript, thus becoming a popular choice among developers. This book covers the features of Node that are especially helpful to developers creating highly concurrent real-time applications. It takes you on a tour of Node's innovative event non-blocking design, showing you how to build professional applications. This edition has been updated to cover the latest features of Node 9 and ES6. All code examples and demo applications have been completely rewritten using the latest techniques, introducing Promises, functional programming, async/await, and other cutting-edge patterns for writing JavaScript code. Learn how to use microservices to simplify the design and composition of distributed systems. From building serverless cloud functions to native C++ plugins, from chatbots to massively scalable SMS-driven applications, you'll be prepared for building the next generation of distributed software. By the end of this book, you'll be building better Node applications more quickly, with less code and more power, and know how to run them at scale in production environments.
Table of Contents (13 chapters)

Why testing is important

A good testing strategy builds confidence through the accumulation of proof and increasing clarity. Within a company, this might mean that some criteria for the execution of a business strategy have been satisfied, allowing for the release of a new service or product. The developers within a project team gain the pleasure of an automated judge that confirms or denies whether changes committed to a code base are sound. With a good testing framework, refactoring loses its danger; the "if you break it you own it" caveat that once placed negative pressure on developers with new ideas is no longer as ominous. Given a good version control system and test/release process, any breaking change can be rolled back without negative impact, freeing curiosity and experimentation.

Three common types of tests are: unit tests, functional tests, and integration...