const expect = require('expect'); const permutations = require('./permutations.js'); test('Testing permutations', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof permutations === 'function').toBeTruthy(); expect(permutations([1, 33, 5])).toEqual( [ [ 1, 33, 5 ], [ 1, 5, 33 ], [ 33, 1, 5 ], [ 33, 5, 1 ], [ 5, 1, 33 ], [ 5, 33, 1 ] ] ); });