fizzbuzz.test.js

const fizzbuzz = require('./fizzbuzz');

describe("fizzbuzz", () => {

    test('should print ERROR message if they argument is not a number', () => {
        const expected = 'Error: It is not a number';
        const result = fizzbuzz("16");
        expect(expected).toBe(result);
    })

    test("should print 1 if they receive 1", () => {
        const expected = 1;
        const result = fizzbuzz(1);
        expect(expected).toBe(result);
    });

    test('should print fizz if they receive 3', () => {
        const expected = 'fizz';
        const result = fizzbuzz(3);
        expect(expected).toBe(result);
    })

    test('should print fizz if they receive a multiple of 3', () => {
        const expected = "fizz";
        const result = fizzbuzz(6);
        expect(expected).toBe(result);
    })

    test('should print buzz if they receive a multiple of 5', () => {
        const expected = 'buzz';
        const result = fizzbuzz(10);
        expect(expected).toBe(result);
    })

    test('should print fizzbuzz if they receive a multiple of 3 and 5', () => {
        const expected = 'fizzbuzz';
        const result = fizzbuzz(15);
        expect(expected).toBe(result);
    })
});