failing.js

test('Register an hook after a plugin', t => {
  t.plan(6)
  const fastify = Fastify()

  fastify.register(fp(function (instance, opts, next) {
    instance.addHook('preHandler', function (req, reply, next) {
      t.ok('called')
      next()
    })

    fastify.get('/', function (request, reply) {
      reply.send({ hello: 'world' })
    })

    next()
  }))

  fastify.register(fp(function (instance, opts, next) {
    fastify.addHook('preHandler', function (req, reply, next) {
      t.ok('called')
      next()
    })

    fastify.addHook('preHandler', function (req, reply, next) {
      t.ok('called')
      next()
    })

    next()
  }))

  fastify.inject({
    url: '/',
    method: 'GET'
  }, (err, res) => {
    t.error(err)
    t.is(res.statusCode, 200)
    t.deepEqual(JSON.parse(res.payload), { hello: 'world' })
  })
})