diff --git a/3-fizzbuzz/specs/fizzbuzz.spec.js b/3-fizzbuzz/specs/fizzbuzz.spec.js
index e69de29..2315a80 100644
--- a/3-fizzbuzz/specs/fizzbuzz.spec.js
+++ b/3-fizzbuzz/specs/fizzbuzz.spec.js
@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest';
+const fizzBuzz = require('../src/fizzbuzz');
+describe('FizzBuzz', () => {
+ it('should return the number as a String', () => {
+ expect(fizzBuzz(1)).toBe('1');
+ expect(fizzBuzz(4)).toBe('4');
+ });
+ it('should return "Fizz" for multiples of 3', () => {
+ expect(fizzBuzz(3)).toBe('Fizz');
+ expect(fizzBuzz(6)).toBe('Fizz');
+ });
+ it('should return "Buzz" for multiples of 5', () => {
+ expect(fizzBuzz(5)).toBe('Buzz');
+ expect(fizzBuzz(10)).toBe('Buzz');
+ });
+ it('should return "FizzBuzz" for multiples of 3 and 5', () => {
+ expect(fizzBuzz(15)).toBe('FizzBuzz');
+ expect(fizzBuzz(30)).toBe('FizzBuzz');
+ });
+ it.each([
+ [1, '1'], [2, '2'], [3, 'Fizz'], [5, 'Buzz'], [15, 'FizzBuzz'], [7, '7'], [9, 'Fizz'], [20, 'Buzz'], [30, 'FizzBuzz']
+ ])('fizzBuzz(%i) should return %s', (input, expected) => {
+ expect(fizzBuzz(input)).toBe(expected);
+ });
+});
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diff --git a/3-fizzbuzz/src/fizzbuzz.js b/3-fizzbuzz/src/fizzbuzz.js
index e69de29..ea74d74 100644
--- a/3-fizzbuzz/src/fizzbuzz.js
+++ b/3-fizzbuzz/src/fizzbuzz.js
@@ -0,0 +1,10 @@
+function fizzBuzz(number) {
+ let result = '';
+
+ if (number % 3 === 0) result += 'Fizz';
+ if (number % 5 === 0) result += 'Buzz';
+
+ return result || String(number);
+}
+
+module.exports = fizzBuzz;
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