next.js/test/development/basic/styled-components-disabled.test.ts

import { join } from 'path'
import webdriver from 'next-webdriver'
import { createNext, FileRef } from 'e2e-utils'
import { NextInstance } from 'e2e-utils'
import { retry } from 'next-test-utils'

// TODO: Somehow the warning doesn't show up with Turbopack, even though the transform is not enabled.
// TODO: It no longer shows up with Webpack either in tests.
;(process.env.IS_TURBOPACK_TEST ? describe.skip : describe.skip)(
  'styled-components SWC transform',
  () => {
    let next: NextInstance

    beforeAll(async () => {
      next = await createNext({
        files: {
          'next.config.js': new FileRef(
            join(__dirname, 'styled-components-disabled/next.config.js')
          ),
          pages: new FileRef(
            join(__dirname, 'styled-components-disabled/pages')
          ),
        },
        dependencies: {
          'styled-components': '6.1.16',
        },
      })
    })
    afterAll(() => next.destroy())

    it('should have hydration mismatch with styled-components transform disabled', async () => {
      let browser
      try {
        // Compile /_error
        browser = await webdriver(next.url, '/404')
        await browser.loadPage(new URL('/', next.url).toString())

        await retry(async () => {
          const logs = await browser.log()
          expect(logs).toEqual(
            expect.arrayContaining([
              {
                message: expect.stringContaining(
                  'https://react.dev/link/hydration-mismatch'
                ),
                source: 'error',
              },
            ])
          )
        })
      } finally {
        if (browser) {
          await browser.close()
        }
      }
    })
  }
)