Node.js 8 the Right Way

Developing Unit Tests with Mocha

Mocha is a popular, multiparadigm testing framework for Node.js. It features several different styles for describing your tests. We’ll be using the behavior-driven development (BDD) style.

To use Mocha, first we’ll install it with npm, Node.js’s built-in package manager. Next we’ll develop a unit test for the LDJClient class. And finally we’ll use npm to run the test suite.

Installing Mocha with npm

Installing Node.js packages with npm can be quite easy, which partly explains the abundance of modules available to you. Even so, it’s important to understand what’s going on so you can manage your dependencies.

npm relies on a configuration file called package.json, so let’s create one now. Open ...