Book Image

Node Cookbook - Fourth Edition

By : Bethany Griggs
4 (1)
Book Image

Node Cookbook - Fourth Edition

4 (1)
By: Bethany Griggs

Overview of this book

A key technology for building web applications and tooling, Node.js brings JavaScript to the server enabling full-stack development in a common language. This fourth edition of the Node Cookbook is updated with the latest Node.js features and the evolution of the Node.js framework ecosystems. This practical guide will help you to get started with creating, debugging, and deploying your Node.js applications and cover solutions to common problems, along with tips to avoid pitfalls. You'll become familiar with the Node.js development model by learning how to handle files and build simple web applications and then explore established and emerging Node.js web frameworks such as Express.js and Fastify. As you advance, you'll discover techniques for detecting problems in your applications, handling security concerns, and deploying your applications to the cloud. This recipe-based guide will help you to easily navigate through various core topics of server-side web application development with Node.js. By the end of this Node book, you'll be well-versed with core Node.js concepts and have gained the knowledge to start building performant and scalable Node.js applications.
Table of Contents (14 chapters)

Testing with tape

Tape is a TAP-producing test library for both Node.js and the browser. Tape is one of the more lightweight testing frameworks and is commonly used to implement unit testing.

TAP stands for Test Anything Protocol (https://testanything.org/). TAP is a language-agnostic text-based protocol that enables communication between unit tests and a test harness. Initially created for the Perl programming language in 1987, today the protocol is used by testing libraries for many languages – including JavaScript. TAP provides a simple and minimal view for test results.

In this recipe, we'll learn how we can use the tape test library (https://www.npmjs.com/package/tape) to unit test our application.

Getting ready

  1. Let's first create a directory to work in and initialize our project directory:
    $ mkdir testing-with-tape
    $ cd testing-with-tape
    $ npm init --yes

    We need to have a program that we can test. We'll create a small calculator program that...