Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
5 (1)
Book Image

Accelerating Server-Side Development with Fastify

5 (1)
By: Manuel Spigolon, Maksim Sinik, Matteo Collina

Overview of this book

This book is a complete guide to server-side app development in Fastify, written by the core contributors of this highly performant plugin-based web framework. Throughout the book, you’ll discover how it fosters code reuse, thereby improving your time to market. Starting with an introduction to Fastify’s fundamental concepts, this guide will lead you through the development of a real-world project while providing in-depth explanations of advanced topics to prepare you to build highly maintainable and scalable backend applications. The book offers comprehensive guidance on how to design, develop, and deploy RESTful applications, including detailed instructions for building reusable components that can be leveraged across multiple projects. The book presents guidelines for creating efficient, reliable, and easy-to-maintain real-world applications. It also offers practical advice on best practices, design patterns, and how to avoid common pitfalls encountered by developers while building backend applications. By following these guidelines and recommendations, you’ll be able to confidently design, implement, deploy, and maintain an application written in Fastify, and develop plugins and APIs to contribute to the Fastify and open source communities.
Table of Contents (21 chapters)
Part 1:Fastify Basics
Part 2:Build a Real-World Project
Part 3:Advanced Topics

Dealing with complex tests

So far, we have seen simple test cases that did not require multiple API requests. So, let’s create the test/login.test.js file to verify the sign-up and first user login to our application. We will use what we have learned so far, keeping in mind that we don’t want to replicate code.

We need to build the Fastify instance to write new test cases, as we did in the test/basic.test.js file. To do so, we need to do the following:

  1. Create a new utility file and call it test/helper.js.
  2. In the test/helper.js file, move the buildApp function and its configuration variables, startArgs and envParam. This action requires some copying and pasting.
  3. Update the test/basic.test.js file within the new import, const { buildApp } = require('./helper').

By doing so, we can reuse code to instantiate the Fastify application across all the test files we are going to create. We are now ready to write more complex tests.