Added unit tets for Caesar Cipher algorithm #54

Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,33 @@
	const { caesarCipher } = require('.');

	describe('Caesar Cipher test suit', () => {
	it('Should raise an error when missing second arg', () => {
	expect(() => { caesarCipher('hello'); }).toThrowError();
	});

	it('Should raise an error when second arg is not a num', () => {
	expect(() => { caesarCipher('hello', 'yes'); }).toThrowError();
	});

	it('Should return a encrypted word with positive num', () => {
	expect(caesarCipher('character', 10)).toBe('mrkbkmdob');
	});

	it('Should return the same word/sentence introduced if num = 0', () => {
	expect(caesarCipher('character', 0)).toBe('character');
	});

	it('Should return a encrypted word with negative num', () => {
	expect(caesarCipher('character', '-10')).toBe('sxqhqsjuh');
	});

	it('Should reuturn a encrypted sentence with spaces', () => {
	expect(caesarCipher('another one bite the dust', 15))
	.toBe('pcdiwtg dct qxit iwt sjhi');
	});

	it('Should return a encrypted sentence with preserved upper case letters', () => {
	expect(caesarCipher('Another one Bite the Dust', 15))
	.toBe('Pcdiwtg dct Qxit iwt Sjhi');
	});
	});

6 changes: 5 additions & 1 deletion src/_Classics_/caeser_cipher/index.js

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Original file line number	Diff line number	Diff line change
Expand Up		@@ -21,7 +21,7 @@ function caesarCipher(str, num) {
		alphabetsMap[alphabets[index]] = index;
		}

	for (let index in lowerCaseString) {
	for (const index in lowerCaseString) {
		// get the current character
		const currentCharacter = lowerCaseString[index];

Expand Down Expand Up		@@ -59,3 +59,7 @@ function caesarCipher(str, num) {
		}
		return result;
		}

	module.exports = {
	caesarCipher,
	};

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