myscript.js

const multiply = (a, b) => {
    return parseInt(a) * parseInt(b);
}

describe('Multiply functionality', () => {
    test('multiply 2 by 2 to equal 4', () => {
        expect(multiply(2, 2)).toBe(4);
    });

    test('verify return value is a number', () => {
        expect(typeof multiply(2, 2)).toBe('number')
    })
})