next-test-helpers

Some useful helpers for integration testing Next.js applications.

Jest example:

/* global jasmine, describe, it, beforeAll, afterAll */

'use strict'

import {expectElement, setup, render, teardown} from 'next-test-helper'

jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000

describe('next-test-helper', () => {
  beforeAll(async () => await setup('./test/fixtures'))
  afterAll(async () => await teardown())

  it('should render a "hello world" page', async () => {
    const element = await render('/hello')
    expectElement(element).to.have.text('Hello World. About')
  })
})

the api

• setup(dir): build the application pointed to by dir. Run with SKIP_BUILD=1 to run against the last app that was built.

  • dir: path to your Next.js application.

  beforeAll(async () => await setup('./test/fixtures'))

• teardown(): cleanup after you application.

  afterAll(async () => await teardown())

• render(path, [query], [req], [res]): render the page pointed to by path. Returns a cheerio DOM Element.

  • path: route to render.
  • query: query string, this will be passed to render and populated in req.url.
  • req: the request object, populates with sensible defaults.
  • res: the response object, populates with sensible defaults.

• expectElement(element): run a chai-cheerio expect() assertion against the element returned by render.

  • element: the element returned by a call to render.

chai-cheerio examples

See this README for detailed documentation on the chai-cheerio/chai-jquery

assert against text content:

expectElement(element).to.have.text('Hello World. About')

using selectors:

expectElement(
  element.find('#host')
).to.have.text('www.example.com')

license

ISC