util functions for radar test

isString(o)

isArray(o)

isFunction(o)

isObject(o)

objectSize(o)

objectSize({x: 100})  =>  1

isEmptyObject(o):boolean

isEmptyObject({})  =>  true

objectValues(o)

objectValues({x: 100, y: 200})  => [100, 200]

isInObjectValues(o, o):boolean

isInObjectValues(100, {x: 100, y: 200})  => true

md5Str(o)

md5Str(1)  => 'c4ca4238a0b923820dcc509a6f75849b'

md5File(p)

md5File('/a/a')  => ''

isFile(p):boolean

isFile('/a/a')  => false

readJSONFile(p)

readJSONFile('/a/a')  => {x: 100}

extend(...o)

extend({}, {x: 100}, {y: 100})  => {x: 100, y: 100}

getFormatTime(date, format)

getFormatTime()  => '2016-06-06 12:12:12'

getExternalIp()

isReadStream(rs):boolean

trim(o)

getMAC

get local mac address