rocky/test/helpers.js

Full-featured, middleware-oriented, hackable HTTP and WebSocket proxy

const sinon = require('sinon')
const http = require('http')
const expect = require('chai').expect
const helpers = require('../lib/helpers')

suite('helpers', function () {
  test('toArray', function (done) {
    expect(helpers.toArray(arguments)).to.be.deep.equal([ done ])
    expect(helpers.toArray(null)).to.be.deep.equal([])
    expect(helpers.toArray(void 0)).to.be.deep.equal([])
    expect(helpers.toArray({})).to.be.deep.equal([])
    expect(helpers.toArray(1)).to.be.deep.equal([])
    expect(helpers.toArray('foo')).to.be.deep.equal(['f', 'o', 'o'])
    done()
  })

  test('isRegExp', function () {
    expect(helpers.isRegexp(/0-9/)).to.be.true
    expect(helpers.isRegexp(new RegExp())).to.be.true
    expect(helpers.isRegexp(null)).to.be.false
    expect(helpers.isRegexp([])).to.be.false
    expect(helpers.isRegexp({})).to.be.false
    expect(helpers.isRegexp('')).to.be.false
    expect(helpers.isRegexp(123)).to.be.false
    expect(helpers.isRegexp(void 0)).to.be.false
  })

  test('once', function () {
    const spy = sinon.spy()
    const fn = helpers.once(spy)
    fn('foo')
    fn('bar')
    expect(spy.calledOnce).to.be.true
    expect(spy.args[0]).to.have.length(1)
    expect(spy.args[0][0]).to.be.equal('foo')
  })

  test('cloneRequest', function () {
    const req = new http.IncomingMessage()
    req.headers = { foo: 'bar' }
    req.rocky = { options: { foo: { bar: true } } }

    const newReq = helpers.cloneRequest(req)
    expect(newReq).to.not.be.equal(req)
    expect(newReq.rocky).to.not.be.equal(req.rocky)
    expect(newReq.headers).to.not.be.equal(req.headers)
    expect(newReq.rocky.options).to.not.be.equal(req.rocky.options)
    expect(newReq.rocky.options.foo).to.not.be.equal(req.rocky.options.foo)
    expect(Object.getPrototypeOf(newReq)).to.be.equal(Object.getPrototypeOf(req))
  })

  test('permute', function () {
    const arr = [ 1, 2, 3 ]
    expect(arr).to.be.deep.equal([1, 2, 3])
    helpers.permute(arr)
    expect(arr).to.be.deep.equal([2, 3, 1])
    helpers.permute(arr)
    expect(arr).to.be.deep.equal([3, 1, 2])
    helpers.permute(arr)
    expect(arr).to.be.deep.equal([1, 2, 3])
  })

  test('eachSeries', function (done) {
    const spy = sinon.spy()
    const arr = [ 1, 2, 3 ]

    function iterator (value, next) {
      spy(value)
      setTimeout(next, Math.random() * 5)
    }

    helpers.eachSeries(arr, iterator, function (err) {
      expect(err).to.be.undefined
      expect(spy.calledThrice).to.be.true
      expect(spy.args[0][0]).to.be.equal(1)
      expect(spy.args[1][0]).to.be.equal(2)
      expect(spy.args[2][0]).to.be.equal(3)
      done(err)
    })
  })

  test('eachConcurrently', function (done) {
    const spy = sinon.spy()
    const arr = [ 1, 2, 3 ]

    function iterator (value, next) {
      spy(value)
      setTimeout(next, Math.random() * 5)
    }

    helpers.eachConcurrently(arr, iterator, function (err) {
      expect(err).to.be.undefined
      expect(spy.calledThrice).to.be.true
      expect(spy.args[0][0]).to.be.within(1, 3)
      expect(spy.args[2][0]).to.be.within(1, 3)
      done(err)
    })
  })
})