30-seconds-of-code/test/fibonacciUntilNum/fibonacciUntilNum.test.js

const expect = require('expect');
const fibonacciUntilNum = require('./fibonacciUntilNum.js');

test('fibonacciUntilNum is a Function', () => {
  expect(fibonacciUntilNum).toBeInstanceOf(Function);
});