const expect = require('expect'); const sortedLastIndex = require('./sortedLastIndex.js'); test('Testing sortedLastIndex', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof sortedLastIndex === 'function').toBeTruthy(); expect(sortedLastIndex([10, 20, 30, 30, 40], 30)).toBe(4); });