test.js
'use strict'
var test = require('tape')
var arithmetic = require('./')
test(function (t) {
t.equal(arithmetic.add('2', 1), 3)
t.equal(arithmetic.add(4, 1), 5)
t.equal(arithmetic.sum([4, '1', 2]), 7)
t.equal(arithmetic.subtract(4, 1), 3)
t.equal(arithmetic.difference([4, '1', 2]), 1)
t.equal(arithmetic.multiply(10, 2), 20)
t.equal(arithmetic.product([4, 3, 2]), 24)
t.equal(arithmetic.divide(10, 2), 5)
t.equal(arithmetic.quotient([32, 4, 2]), 4)
t.end()
})