next.js/test/development/next-font/font-loader-in-document-error.test.ts

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

describe('font-loader-in-document-error', () => {
  let next: NextInstance

  beforeAll(async () => {
    next = await createNext({
      files: {
        pages: new FileRef(join(__dirname, 'font-loader-in-document/pages')),
      },
    })
  })
  afterAll(() => next.destroy())

  test('next/font inside _document', async () => {
    const browser = await webdriver(next.url, '/')
    expect(await hasRedbox(browser)).toBeTrue()
    if (process.env.TURBOPACK) {
      // TODO: Turbopack doesn't include pages/
      expect(await getRedboxSource(browser)).toMatchInlineSnapshot(`
        "./_document.js
        next/font: error:
        Cannot be used within _document.js"
      `)
    } else {
      expect(await getRedboxSource(browser)).toMatchInlineSnapshot(`
              "pages/_document.js
              \`next/font\` error:
              Cannot be used within pages/_document.js."
          `)
    }
  })
})