const expect = require('expect'); const pull = require('./pull.js'); test('Testing pull', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof pull === 'function').toBeTruthy(); let myArray = ['a', 'b', 'c', 'a', 'b', 'c']; pull(myArray, 'a', 'c'); expect(myArray).toEqual(['b','b']); });