javascript testing code example

Example 1: what is jest

Jest is a JavaScript testing framework maintained by Facebook, Inc. with a
focus on simplicity.

It works with projects using: Babel, TypeScript, Node.js, React, Angular and
Vue.js.

It aims to work out of the box and config free.

Example 2: test() javascript

const str = "Hello World";
var item = /Hello/,  // to define the item name use /item name/
 result = item.test(str); //test() used to search for a specific item in strings
// returns "true"