feat: fizzbuzz algorithm

Author: francislagares

src/algorithms/fizzbuzz/fizzbuzz.ts

@@ -0,0 +1,13 @@
+export const fizzBuzz = (n: number) => {
+  for (let i = 1; i <= n; i++) {
+    if (i % 3 === 0 && i % 5 === 0) {
+      console.log('FizzBuzz');
+    } else if (i % 3 === 0) {
+      console.log('Fizz');
+    } else if (i % 5 === 0) {
+      console.log('Buzz');
+    } else {
+      console.log(i);
+    }
+  }
+};

src/algorithms/fizzbuzz/tests/fizzbuzz.test.ts

@@ -0,0 +1,45 @@
+import { SpyInstance, describe, test, vi } from 'vitest';
+
+import { fizzBuzz } from '../fizzbuzz';
+
+describe('Fizzbuzz Algorithm', () => {
+  let spy: SpyInstance;
+
+  beforeEach(() => {
+    spy = vi.spyOn(console, 'log').mockImplementation(() => {});
+  });
+
+  afterEach(() => {
+    spy.mockRestore();
+  });
+
+  test('fizzBuzz function is defined', () => {
+    expect(fizzBuzz).toBeDefined();
+  });
+
+  test('Calling fizzbuzz with `5` prints out 5 statements', () => {
+    fizzBuzz(5);
+
+    expect(spy.mock.calls.length).toEqual(5);
+  });
+
+  test('Calling fizzbuzz with 15 prints out the correct values', () => {
+    fizzBuzz(15);
+
+    expect(spy.mock.calls[0][0]).toEqual(1);
+    expect(spy.mock.calls[1][0]).toEqual(2);
+    expect(spy.mock.calls[2][0]).toEqual('Fizz');
+    expect(spy.mock.calls[3][0]).toEqual(4);
+    expect(spy.mock.calls[4][0]).toEqual('Buzz');
+    expect(spy.mock.calls[5][0]).toEqual('Fizz');
+    expect(spy.mock.calls[6][0]).toEqual(7);
+    expect(spy.mock.calls[7][0]).toEqual(8);
+    expect(spy.mock.calls[8][0]).toEqual('Fizz');
+    expect(spy.mock.calls[9][0]).toEqual('Buzz');
+    expect(spy.mock.calls[10][0]).toEqual(11);
+    expect(spy.mock.calls[11][0]).toEqual('Fizz');
+    expect(spy.mock.calls[12][0]).toEqual(13);
+    expect(spy.mock.calls[13][0]).toEqual(14);
+    expect(spy.mock.calls[14][0]).toEqual('FizzBuzz');
+  });
+});