grunt test has many errors

[chuan9]

@Cloud-Chen Can you help tract the error? I don't know when to start.
error log:
at FSReqWrap.oncomplete (fs.js:123:15)
index: 3731,
lineNumber: 91,
column: 57,
description: 'Unexpected token =>' }

And many errors occur here, Someone need to run test before submit a patch to front-end.