const expect = require('expect'); const countOccurrences = require('./countOccurrences.js'); test('Testing countOccurrences', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof countOccurrences === 'function').toBeTruthy(); expect(countOccurrences([1, 1, 2, 1, 2, 3], 1)).toEqual(3); });