import { length } from './length'
test('happy', () => { expect(length('foo')).toEqual(3) expect(length([ 1, 2, 3 ])).toEqual(3) expect(length([])).toEqual(0)})
test('with empty string', () => { expect(length('')).toEqual(0)})
test('with bad input returns NaN', () => { expect(length(0)).toBeNaN() expect(length({})).toBeNaN() expect(length(null)).toBeNaN() expect(length(undefined)).toBeNaN()})