The following survey by GitHub shows that JavaScript has topped the charts for most popular language, with maximum pull requests in the last year by owning 2.3 million projects.
https://octoverse.github.com/
JavaScript
JavaScript has entered a revolutionary era where web developers are writing code for both client and server side using JS. This eventually facilitates resource re-usability and saves the time and cost of development.
The reason behind JavaScript being crowned as a pick up language is the simplicity and flexibility it carries for both client and server side. Typically, Node.js is being used in order to execute JavaScript at back-end. The collaboration between JavaScript and Node.js makes the modern JavaScript an ideal choice for real-time web applications.
JavaScript Frameworks
There are multiple modern JavaScript frameworks in the market. The following trend shows that top three front-end JavaScript frameworks are React.js, Vue.js, and Angular.js.
Comparing the UI Frameworks Trends
Automation Challenges on JavaScript Platform
JavaScript based applications load their content without refreshing. So, the content is dynamic in nature. Hence, tracing the UI modifications and locating elements is a challenge.
Challenges with traditional automation tools
Good amount of customization and efforts are required by the traditional tools, for automating apps based on modern JS.
To identify locators in compound class used in JavaScript, we have to use Xpath which is not a recommended approach.
Technologies for JavaScript Automation
Front-End UI Framework
React.js
Angular.js
Mocha, Nightwatch, Jasmine, Jest, Enzyme, Protractor
Protractor, Karma, Mocha, Jasmine
Automation Technologies
Tool Evaluated
Mocha is a JavaScript testing framework which runs on Node.js and executes asynchronous code. It executes tests serially and maps the exceptions to corresponding test cases. Official website is “http://mochajs.org”.
Why Mocha is preferred?
Mocha includes Test runner and API for setting up suites. It is fast as it runs on Node.js, easier to setup, convenient, supports both TDD and BDD, and supports all kinds of unit and functional tests.
Features of Mocha in React.js Application Automation
- Makes asynchronous code testing easy using promises and callbacks
- Supports assertion libraries – should.js, expect.js, chai, and better-assert
- Supports Chrome, Safari, IE, Opera, and Firefox browsers
- Allows results presentation in HTML and customized formats
- Allows before, after, before each, and after each hooks
Outro
- Modern JavaScript is used by most businesses for front-end + back-end via Node.js because of the speed and simplicity
- Traditional automation tools do not meet the requirements of the new JS front-end web Automation
- There are a variety of automation tools for Angular.js and React.js
- Mocha has evolved as a mature, simple, flexible, and empowered testing framework. It smoothly handles the callbacks using promises to make asynchronous code run with ease
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