request.test.ts

import { deepStrictEqual, equal, rejects, throws } from 'node:assert'
import { afterEach, test } from 'node:test'
import { setTimeout } from 'node:timers/promises'

import {
  checkAndRemoveRequestMock,
  expectRequest,
  mockRequest,
  request,
  setRequestMethod
} from '../index.ts'

afterEach(() => {
  setRequestMethod(fetch)
})

test('replaces request method', () => {
  let result = new Promise<Response>(resolve => {
    resolve(new Response())
  })

  let calls: string[] = []
  setRequestMethod(url => {
    if (typeof url === 'string') {
      calls.push(url)
    }
    return result
  })

  equal(request('https://example.com'), result)
  deepStrictEqual(calls, ['https://example.com'])
})

test('checks that all mock requests was called', async () => {
  mockRequest()

  expectRequest('https://one.com').andRespond(200)
  expectRequest('https://two.com').andRespond(200)

  equal((await request('https://one.com')).status, 200)
  throws(() => {
    checkAndRemoveRequestMock()
  }, /didn’t send requests: https:\/\/two.com/)
})

test('checks mocks order', async () => {
  mockRequest()

  expectRequest('https://one.com').andRespond(200)
  expectRequest('https://two.com').andRespond(200)

  await rejects(
    request('https://two.com'),
    /https:\/\/one\.com instead of https:\/\/two\.com/
  )
})

test('is ready for unexpected requests', async () => {
  mockRequest()

  expectRequest('https://one.com').andRespond(200)

  equal((await request('https://one.com')).status, 200)
  await rejects(
    request('https://one.com'),
    /Unexpected request https:\/\/one.com/
  )
})

test('marks requests as aborted', async () => {
  mockRequest()
  let reply = expectRequest('https://one.com').andWait()

  let aborted = ''
  let controller = new AbortController()
  request('https://one.com', { signal: controller.signal }).catch(e => {
    if (e instanceof Error) aborted = e.name
  })

  controller.abort()
  await setTimeout(10)
  equal(aborted, 'AbortError')
  equal(reply.aborted, true)
})

test('sets content type', async () => {
  mockRequest()

  expectRequest('https://one.com').andRespond(200, 'Hi')
  let response1 = await request('https://one.com')
  equal(response1.headers.get('content-type'), 'text/html')

  expectRequest('https://two.com').andRespond(200, 'Hi', 'text/plain')
  let response2 = await request('https://two.com')
  equal(response2.headers.get('content-type'), 'text/plain')

  let reply3 = expectRequest('https://two.com').andWait()
  reply3(200, 'Hi', 'text/html; charset=utf-8')
  let response3 = await request('https://two.com')
  equal(response3.headers.get('content-type'), 'text/html; charset=utf-8')
})