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Palindrome.test.js

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import { palindrome } from '../Palindrome'

describe('Palindrome', () => {

it('expects to return true for palindrome string', () => {

const isPalindrome = palindrome('madam')

expect(isPalindrome).toBe(true)

})

it('expects to return true for Empty String', () => {

const isPalindrome = palindrome('')

expect(isPalindrome).toBe(true)

})

it('expects to return false for non-palindrome string', () => {

const isPalindrome = palindrome('foobar')

expect(isPalindrome).toBe(false)

})

it('Throw Error for Invalid Input', () => {

expect(() => palindrome(123)).toThrow('Invalid Input')

expect(() => palindrome(null)).toThrow('Invalid Input')

expect(() => palindrome(undefined)).toThrow('Invalid Input')

})