const expect = require('expect'); const none = require('./none.js'); test('Testing none', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof none === 'function').toBeTruthy(); expect(none([0,undefined,NaN,null,''])).toBeTruthy(); expect(none([0,1])).toBeFalsy(); expect(none([4,1,0,3], x => x < 0)).toBeTruthy(); expect(none([0,1,2], x => x === 1)).toBeFalsy(); });