In automation, validations in test scripts are also called assertions . Some WebdriverIO assertions were covered in Chapter 4 (i.e., element APIs). Node.js has a built-in assertion library that is called with const assert = require('assert'). No installation is required. However, you can implement more powerful assertions with the user-friendly Chai Assertion Library in your framework. Install Chai using npm install chai -save--dev at a terminal.
Once installed, import the Chai Assertion Library using statement const assert = require('chai').assert ...
