test(typescript): add a test case with functions in next.config.js

test/integration/typescript/test/index.test.js

@@ -108,6 +108,29 @@ export default function EvilPage(): JSX.Element {
  expect(output.code).toBe(0)
  })
 
+ it('should build the app with functions in next.config.js', async () => {
+ const nextConfig = new File(join(appDir, 'next.config.js'))
+
+ nextConfig.write(`
+ module.exports = {
+ webpack(config) { return config },
+ onDemandEntries: {
+ // Make sure entries are not getting disposed.
+ maxInactiveAge: 1000 * 60 * 60,
+ },
+ }
+ `)
+
+ try {
+ const output = await nextBuild(appDir, [], { stdout: true })
+
+ expect(output.stdout).toMatch(/Compiled successfully/)
+ expect(output.code).toBe(0)
+ } finally {
+ nextConfig.restore()
+ }
+ })
+
  it('should not inform when using default tsconfig path', async () => {
  const output = await nextBuild(appDir, [], { stdout: true })
  expect(output.stdout).not.toMatch(/Using tsconfig file:/)