How to use

_includes

function

in

lodash

it('_handleConfigEvent: emits error if config failed', (done) => {
   ws = createTestWSv2Instance()
   ws.on('error', (err) => {
    if (_includes(err.message, '42')) done()
   })
   ws._handleConfigEvent({ status: 'bad', flags: 42 })
  })

/**
  * Check if the instance is subscribed to the specified channel ID
  *
  * @param {number} chanId - ID of channel to query
  * @returns {boolean} isSubscribed
  */
 hasChannel (chanId) {
  return _includes(Object.keys(this._channelMap), chanId)
 }

/**
  * NOTE: Cannot filter against pending subscriptions, due to unknown chanId
  *
  * @param {number} chanId - channel ID
  * @returns {object} wsState - undefined if not found
  */
 getSocketWithChannel (chanId) {
  return this._sockets.find(s => {
   return (
    s.ws.hasChannel(chanId) &&
    !_includes(s.pendingUnsubscriptions, chanId)
   )
  })
 }

/**
  * Get the total number of data channels this instance is currently
  * subscribed too.
  *
  * @returns {number} count
  * @see WSv2#subscribeTrades
  * @see WSv2#subscribeTicker
  * @see WSv2#subscribeCandles
  * @see WSv2#subscribeOrderBook
  */
 getDataChannelCount () {
  return Object
   .values(this._channelMap)
   .filter(c => _includes(DATA_CHANNEL_TYPES, c.channel))
   .length
 }

if (_includes(err.message, 'seq #')) errorsSeen++

/**
  * Returns the first socket that is subscribed/pending sub to the specified
  * channel.
  *
  * @param {string} type - i.e. 'book'
  * @param {object} filter - i.e. { symbol: 'tBTCUSD', prec: 'R0' }
  * @returns {object} wsState - undefined if not found
  */
 getSocketWithDataChannel (type, filter) {
  return this._sockets.find(s => {
   const subI = s.pendingSubscriptions.findIndex(s => (
    s[0] === type && _isEqual(s[1], filter)
   ))

   if (subI !== -1) {
    return true
   }

   // Confirm unsub is not pending
   const cid = s.ws.getDataChannelId(type, filter)

   if (!cid) {
    return false
   }

   return cid && !_includes(s.pendingUnsubscriptions, cid)
  })
 }

if (!_includes(e.message, 'no ws client')) {
 throw new Error('received unexpected error')
} else {
if (!_includes(e.message, 'currently closing')) {
 throw new Error('received unexpected error')
} else {