const expect = require('expect'); const indexOfAll = require('./indexOfAll.js'); test('indexOfAll is a Function', () => { expect(indexOfAll).toBeInstanceOf(Function); }); test('Returns all indices of val in an array', () => { expect(indexOfAll([1, 2, 3, 1, 2, 3], 1)).toEqual([0,3]); }); test('Returns all indices of val in an array', () => { expect(indexOfAll([1, 2, 3], 4)).toEqual([]); });