JavaScript and the DOM, Unit Testing

JavaScript and the DOM, Unit Testing

Task : 1.First, Write a function called Greet(name) that takes an argument called name, and returns a simple greeting message. For example, if the name is “Elizabeth” the function should return “Hello, Elizabeth”.

2.Next, handle null values by introducing a default. For example, when the name parameter is null, then the method should return the string “Hello there!”.

3.Next, add shouting. When “name” is all uppercase, then the method should shout back to the user. For example, when the name is "JOSE" then the method should return the string "HELLO JOSE!".

4..Next, Handle two names as input. If the name parameter is an array containing two names, then both names should be greeted. For example, if the input parameter is [‘Jose’,’Pep’], the method should return the string: “Hello, Jose, Pep”.

5.Finally, Handle an arbitrary number of names as input. If the name parameter is an array of multiple names, all names must be greeted. For example, if the input parameter is [‘Alex’,’Arsene’,’Jose’,’Zidane’], the method should return the string: “Hello, Alex, Arsene, Jose, Zidane”

JS CODE:

// Unit tests to cover the greet() function // To run these tests, make sure you're in the folder containing this file // run the command: npm install to setup the testing framework // Thn run the command: npm run test // The tests should run successfully

import greet from './greetings'; describe('test greet()', function () { it('should greet a name', function () { expect(greet('Elizabeth')).toEqual('Hello, Elizabeth'); }); it('should handle null value', function () { expect(greet()).toEqual('Hello there!'); }); it('should handle shouting', function () { expect(greet('JOSE')).toEqual('HELLO JOSE!'); }); it('should handle 2 names', function () { expect(greet(['Jose', 'Pep'])).toEqual('Hello, Jose, Pep'); }); it('should handle multiple names', function () { expect(greet(['Alex', 'Arsene', 'Jose', 'Zidane'])).toEqual( 'Hello, Alex, Arsene, Jose, Zidane' ); }); }); My answer”Any Hints, comments and suggestions are very much welcome, I have a couple of questions I tried to answer please correct me if I am wrong, thank you in advance for your help.” export default function greet(name) { if (name === null || name === undefined) return 'Hello there!'; if (typeof name === typeof []) { if (name.length > 0) { let names = ''; name.forEach((elm) => { names += ', ' + elm; }); return 'Hello' + names; } return 'Hello there!'; } if (name === name.toUpperCase()) { return 'HELLO ' + name + '!'; } return 'Hello, ' + name; }

SNAP SHOT: https://w.trhou.se/7ywk0t0lnp