Mocha is a javascript test framework that runs tests on NodeJS and in the browser. It provides a modular way to write a structured code for testing the applications by classifying them into test suites and test cases modules for execution and produces a precise test report.

To enhance code reusability Mocha provides some kinds of hooks (before, after, beforeEach, afterEach, beforeAll, afterAll).

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It comes in the form of a Node package via 'npm' supporting a set of JavaScript assertion libraries.

Mocha is compatible for Chai which is an assertion library.

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Mocha has two modes for running tests,either by command line(CLI) or programmatically(Mocha API). But we will be further focusing on CLI method.

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How to Install and Setup Mocha-Chai ?

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Prerequisites :​​

Install Selenium JavaScript setup on an editor => Follow Guide

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Installing Mocha-Chai Via NPM

• Open VS code,go to the File, click on Open folder.

• Now browse to that project folder where setup has done for selenium javascript(In my case it's SeleniumJS.) to open it in editor.

• Open terminal in the editor.

• Navigate to the project folder directory using 'cd' command.

• To install mocha-chai, run command : 'npm install mocha chai'.

• Wait for the installation.

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• Once installed, the package.json file would be updtaed with newly added dependencies which are for mocha and chai.

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• Also, mocha and chai libraries would be added in .bin folder of package node_modules.

• Now mocha-chai setup has been done successfully.

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Refer next page Selenium Test In Mocha-Chai Framework