apollo/packages/test-e2e/apollo-server/context.js

const users = require('./connectors/users')

// Context passed to all resolvers (third argument)
// req => Query
// connection => Subscription

module.exports = ({ req, connection }) => {
  // If the websocket context was already resolved
  if (connection && connection.context)
    return connection.context

  let rawToken
  // HTTP
  if (req)
    rawToken = req.get('Authorization')
  // Websocket
  if (connection)
    rawToken = connection.Authorization

  // Token
  const token = rawToken ? JSON.parse(rawToken) : null
  let userId

  // User validation
  if (token && users.validateToken(token)) {
    userId = token.userId
  }

  // return new Promise(resolve => {
  //   setTimeout(() => {
  //     resolve({
  //       token,
  //       userId,
  //     })
  //   }, 3000)
  // })
  return {
    token,
    userId,
  }
}