'use strict'; var assert = require('assert'); var pb = require('./pretty-bytes'); it('should throw on invalid input', function () { assert.throws(function () { pb('') }); assert.throws(function () { pb('1') }); assert.throws(function () { pb(NaN) }); assert.throws(function () { pb(true) }); }); it('should convert bytes to human readable strings', function () { assert.equal(pb(0), '0 B'); assert.equal(pb(10), '10 B'); assert.equal(pb(999), '999 B'); assert.equal(pb(1001), '1 kB'); assert.equal(pb(1001), '1 kB'); assert.equal(pb(9999999999999999), '10 PB'); }); it('should support negative number', function () { assert.equal(pb(-999), '-999 B'); });