const expect = require('expect'); const lowercaseKeys = require('./lowercaseKeys.js'); test('Testing lowercaseKeys', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof lowercaseKeys === 'function').toBeTruthy(); const myObj = { Name: 'Adam', sUrnAME: 'Smith' }; const myObjLower = lowercaseKeys(myObj); expect(myObjLower).toEqual({name: 'Adam', surname: 'Smith'}); expect(myObj).toEqual({ Name: 'Adam', sUrnAME: 'Smith' }); });