Nano It Tiny test library. Usage $ node it.js file-to-test.js second-file-to-test.js .... Example test it('1 + 1 = 2', () => { assert(1 + 1 === 2) }) it('1 + 1 = 2 with mock', () => { mock('./add', () => 2) const add = require('./add') assert(add(1, 1) === 2) })