next.js/test/integration/invalid-page-automatic-static-optimization/test/index.test.ts

/* eslint-env jest */

import fs from 'fs-extra'
import path from 'path'
import { nextBuild } from 'next-test-utils'

const appDir = path.join(__dirname, '..')

describe('Invalid Page automatic static optimization', () => {
  ;(process.env.TURBOPACK_DEV ? describe.skip : describe)(
    'production mode',
    () => {
      it('Fails softly with descriptive error', async () => {
        const { stderr } = await nextBuild(appDir, [], { stderr: true })

        expect(stderr).toMatch(
          /Build optimization failed: found pages without a React Component as default export in/
        )
        expect(stderr).toMatch(/pages\/invalid/)
        expect(stderr).toMatch(/pages\/also-invalid/)
      })

      it('handles non-error correctly', async () => {
        const testPage = path.join(appDir, 'pages/[slug].js')
        await fs.rename(
          path.join(appDir, 'pages'),
          path.join(appDir, 'pages-bak')
        )

        await fs.ensureDir(path.join(appDir, 'pages'))
        await fs.writeFile(
          testPage,
          `
      export default function Page() {
        return <p>hello world</p>
      }

      export function getStaticPaths() {
        throw 'invalid API token'
      }

      export function getStaticProps() {
        return {
          props: {
            hello: 'world'
          }
        }
      }
    `
        )

        try {
          const { stderr } = await nextBuild(appDir, [], { stderr: true })
          expect(stderr).toMatch(/invalid API token/)
          expect(stderr).not.toMatch(/without a React Component/)
        } finally {
          await fs.remove(path.join(appDir, 'pages'))
          await fs.rename(
            path.join(appDir, 'pages-bak'),
            path.join(appDir, 'pages')
          )
        }
      })
    }
  )
})