How to use

_isError

function

in

lodash

it('_updateManagedCandles: returns an error on update for unknown key', () => {
   ws = createTestWSv2Instance()
   ws._candles['trade:1m:tBTCUSD'] = []

   const err = ws._updateManagedCandles('trade:30m:tBTCUSD', [
    1, 10, 70, 150, 30, 10
   ])

   assert(err)
   assert(_isError(err))
  })

 assert(_isError(ws._validateMessageSeq([243, [252.12, 2, -1], 5])))
})
 assert(_isError(ws._validateMessageSeq([0, [252.12, 2, -1], 3, 5])))
})