fastify/test/content-parser.test.js

Fast and low overhead web framework, for Node.js

'use strict'

const t = require('tap')
const test = t.test
const Fastify = require('..')
const keys = require('../lib/symbols')
const { FST_ERR_CTP_ALREADY_PRESENT, FST_ERR_CTP_INVALID_TYPE } = require('../lib/errors')

const first = function (req, payload, done) {}
const second = function (req, payload, done) {}
const third = function (req, payload, done) {}

test('hasContentTypeParser', t => {
  test('should know about internal parsers', t => {
    t.plan(4)

    const fastify = Fastify()
    fastify.ready(err => {
      t.error(err)
      t.ok(fastify.hasContentTypeParser('application/json'))
      t.ok(fastify.hasContentTypeParser('text/plain'))
      t.notOk(fastify.hasContentTypeParser('application/jsoff'))
    })
  })

  test('should work with string and RegExp', t => {
    t.plan(7)

    const fastify = Fastify()
    fastify.addContentTypeParser(/^image\/.*/, first)
    fastify.addContentTypeParser(/^application\/.+\+xml/, first)
    fastify.addContentTypeParser('image/gif', first)

    t.ok(fastify.hasContentTypeParser('application/json'))
    t.ok(fastify.hasContentTypeParser(/^image\/.*/))
    t.ok(fastify.hasContentTypeParser(/^application\/.+\+xml/))
    t.ok(fastify.hasContentTypeParser('image/gif'))
    t.notOk(fastify.hasContentTypeParser(/^image\/.+\+xml/))
    t.notOk(fastify.hasContentTypeParser('image/png'))
    t.notOk(fastify.hasContentTypeParser('*'))
  })

  t.end()
})

test('getParser', t => {
  test('should return matching parser', t => {
    t.plan(3)

    const fastify = Fastify()

    fastify.addContentTypeParser(/^image\/.*/, first)
    fastify.addContentTypeParser(/^application\/.+\+xml/, second)
    fastify.addContentTypeParser('text/html', third)

    t.strictEqual(fastify[keys.kContentTypeParser].getParser('application/t+xml').fn, second)
    t.strictEqual(fastify[keys.kContentTypeParser].getParser('image/png').fn, first)
    t.strictEqual(fastify[keys.kContentTypeParser].getParser('text/html').fn, third)
  })

  test('should prefer content type parser with string value', t => {
    t.plan(2)

    const fastify = Fastify()

    fastify.addContentTypeParser(/^image\/.*/, first)
    fastify.addContentTypeParser('image/gif', second)

    t.strictEqual(fastify[keys.kContentTypeParser].getParser('image/gif').fn, second)
    t.strictEqual(fastify[keys.kContentTypeParser].getParser('image/png').fn, first)
  })

  test('should return parser that catches all if no other is set', t => {
    t.plan(3)

    const fastify = Fastify()

    fastify.addContentTypeParser('*', first)
    fastify.addContentTypeParser(/^text\/.*/, second)

    t.strictEqual(fastify[keys.kContentTypeParser].getParser('image/gif').fn, first)
    t.strictEqual(fastify[keys.kContentTypeParser].getParser('text/html').fn, second)
    t.strictEqual(fastify[keys.kContentTypeParser].getParser('text').fn, first)
  })

  test('should return undefined if no matching parser exist', t => {
    t.plan(2)

    const fastify = Fastify()

    fastify.addContentTypeParser(/^weirdType\/.+/, first)
    fastify.addContentTypeParser('application/javascript', first)

    t.notOk(fastify[keys.kContentTypeParser].getParser('application/xml'))
    t.notOk(fastify[keys.kContentTypeParser].getParser('weirdType/'))
  })

  t.end()
})

test('existingParser', t => {
  test('returns always false for "*"', t => {
    t.plan(2)

    const fastify = Fastify()

    fastify.addContentTypeParser(/^image\/.*/, first)
    fastify.addContentTypeParser(/^application\/.+\+xml/, first)
    fastify.addContentTypeParser('text/html', first)

    t.notOk(fastify[keys.kContentTypeParser].existingParser('*'))

    fastify.addContentTypeParser('*', first)

    t.notOk(fastify[keys.kContentTypeParser].existingParser('*'))
  })

  test('let you override the default parser once', t => {
    t.plan(2)

    const fastify = Fastify()

    fastify.addContentTypeParser('application/json', first)
    fastify.addContentTypeParser('text/plain', first)

    t.throws(
      () => fastify.addContentTypeParser('application/json', first),
      FST_ERR_CTP_ALREADY_PRESENT,
      "Content type parser 'application/json' already present"
    )
    t.throws(
      () => fastify.addContentTypeParser('text/plain', first),
      FST_ERR_CTP_ALREADY_PRESENT,
      "Content type parser 'text/plain' already present"
    )
  })

  const fastify = Fastify()
  const contentTypeParser = fastify[keys.kContentTypeParser]

  fastify.addContentTypeParser(/^image\/.*/, first)
  fastify.addContentTypeParser(/^application\/.+\+xml/, first)
  fastify.addContentTypeParser('text/html', first)

  t.ok(contentTypeParser.existingParser(/^image\/.*/))
  t.ok(contentTypeParser.existingParser('text/html'))
  t.ok(contentTypeParser.existingParser(/^application\/.+\+xml/))
  t.notOk(contentTypeParser.existingParser('application/json'))
  t.notOk(contentTypeParser.existingParser('text/plain'))
  t.notOk(contentTypeParser.existingParser('image/png'))
  t.notOk(contentTypeParser.existingParser(/^application\/.+\+json/))

  t.end()
})

test('add', t => {
  test('should only accept string and RegExp', t => {
    t.plan(4)

    const fastify = Fastify()
    const contentTypeParser = fastify[keys.kContentTypeParser]

    t.error(contentTypeParser.add('test', {}, first))
    t.error(contentTypeParser.add(/test/, {}, first))
    t.throws(
      () => contentTypeParser.add({}, {}, first),
      FST_ERR_CTP_INVALID_TYPE,
      'The content type should be a string or a RegExp'
    )
    t.throws(
      () => contentTypeParser.add(1, {}, first),
      FST_ERR_CTP_INVALID_TYPE,
      'The content type should be a string or a RegExp'
    )
  })

  test('should set "*" as parser that catches all', t => {
    t.plan(1)

    const fastify = Fastify()
    const contentTypeParser = fastify[keys.kContentTypeParser]

    contentTypeParser.add('*', {}, first)
    t.strictEqual(contentTypeParser.customParsers[''].fn, first)
  })

  t.end()
})