DistroHard/node_modules/pg-pool/test/bring-your-own-promise.js

'use strict'
const co = require('co')
const expect = require('expect.js')

const describe = require('mocha').describe
const it = require('mocha').it
const BluebirdPromise = require('bluebird')

const Pool = require('../')

const checkType = (promise) => {
  expect(promise).to.be.a(BluebirdPromise)
  return promise.catch((e) => undefined)
}

describe('Bring your own promise', function () {
  it(
    'uses supplied promise for operations',
    co.wrap(function* () {
      const pool = new Pool({ Promise: BluebirdPromise })
      const client1 = yield checkType(pool.connect())
      client1.release()
      yield checkType(pool.query('SELECT NOW()'))
      const client2 = yield checkType(pool.connect())
      // TODO - make sure pg supports BYOP as well
      client2.release()
      yield checkType(pool.end())
    })
  )

  it(
    'uses promises in errors',
    co.wrap(function* () {
      const pool = new Pool({ Promise: BluebirdPromise, port: 48484 })
      yield checkType(pool.connect())
      yield checkType(pool.end())
      yield checkType(pool.connect())
      yield checkType(pool.query())
      yield checkType(pool.end())
    })
  )
})