first commit

test/integration/middleware-overrides-node.js-api/middleware.js

@@ -0,0 +1,5 @@
+export default function middleware() {
+  process.cwd = () => 'fixed-value'
+  console.log(process.cwd(), !!process.env)
+  return new Response()
+}

test/integration/middleware-overrides-node.js-api/pages/index.js

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+export default function Home() {
+  return <div>A page</div>
+}

test/integration/middleware-overrides-node.js-api/test/index.test.ts

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+/* eslint-env jest */
+
+import {
+  fetchViaHTTP,
+  findPort,
+  killApp,
+  launchApp,
+  waitFor,
+} from 'next-test-utils'
+import { join } from 'path'
+
+const context = { appDir: join(__dirname, '../'), appPort: NaN, app: null }
+
+jest.setTimeout(1000 * 60 * 2)
+
+describe('Middleware overriding a Node.js API', () => {
+  ;(process.env.TURBOPACK_BUILD ? describe.skip : describe)(
+    'development mode',
+    () => {
+      let output = ''
+
+      beforeAll(async () => {
+        output = ''
+        context.appPort = await findPort()
+        context.app = await launchApp(context.appDir, context.appPort, {
+          onStdout(msg) {
+            output += msg
+          },
+          onStderr(msg) {
+            output += msg
+          },
+        })
+      })
+
+      afterAll(() => killApp(context.app))
+
+      it('does not show a warning and allows overriding', async () => {
+        const res = await fetchViaHTTP(context.appPort, '/')
+        await waitFor(500)
+        expect(res.status).toBe(200)
+        expect(output).toContain('fixed-value')
+        expect(output).not.toContain('TypeError')
+        expect(output).not.toContain('A Node.js API is used (process.env')
+        expect(output).not.toContain('A Node.js API is used (process.cwd')
+      })
+    }
+  )
+})