报错信息如下：
1) macaca mobile sample "before all" hook:
[init({"deviceName":"iPhone 5s","platformName":"iOS","autoAcceptAlerts":false,"app":"https://npmcdn.com/ios-app-bootstrap@latest/build/ios-app-bootstrap.zip"})] getaddrinfo ENOTFOUND localhost localhost:3456
Error: getaddrinfo ENOTFOUND localhost localhost:3456
at errnoException (dns.js:26:10)
at GetAddrInfoReqWrap.onlookup as oncomplete2) macaca mobile sample "after all" hook:
[quit()] getaddrinfo ENOTFOUND localhost localhost:3456
Error: getaddrinfo ENOTFOUND localhost localhost:3456
at errnoException (dns.js:26:10)
at GetAddrInfoReqWrap.onlookup as oncomplete
本人刚接触，比较菜；请大神指教
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