fastify/test/content-type.test.js

Fast and low overhead web framework, for Node.js

'use strict'

const { test } = require('node:test')
const Fastify = require('..')

test('should remove content-type for setErrorHandler', async t => {
  t.plan(8)
  let count = 0

  const fastify = Fastify()
  fastify.setErrorHandler(function (error, request, reply) {
    t.assert.strictEqual(error.message, 'kaboom')
    t.assert.strictEqual(reply.hasHeader('content-type'), false)
    reply.code(400).send({ foo: 'bar' })
  })
  fastify.addHook('onSend', async function (request, reply, payload) {
    count++
    t.assert.strictEqual(typeof payload, 'string')
    switch (count) {
      case 1: {
        // should guess the correct content-type based on payload
        t.assert.strictEqual(reply.getHeader('content-type'), 'text/plain; charset=utf-8')
        throw Error('kaboom')
      }
      case 2: {
        // should guess the correct content-type based on payload
        t.assert.strictEqual(reply.getHeader('content-type'), 'application/json; charset=utf-8')
        return payload
      }
      default: {
        t.fail('should not reach')
      }
    }
  })
  fastify.get('/', function (request, reply) {
    reply.send('plain-text')
  })

  const { statusCode, body } = await fastify.inject({ method: 'GET', path: '/' })
  t.assert.strictEqual(statusCode, 400)
  t.assert.strictEqual(body, JSON.stringify({ foo: 'bar' }))
})