Add tests

packages/next-swc/crates/next-dev-tests/tests/integration/next/router/middleware-forwarded-header/input/middleware.ts

@@ -0,0 +1,16 @@
+import { NextResponse } from 'next/server'
+import type { NextRequest } from 'next/server'
+
+export function middleware(request: NextRequest) {
+  const headers = request.headers
+  return NextResponse.json({
+    host: headers.get('x-forwarded-host'),
+    ip: headers.get('x-forwarded-ip'),
+    port: headers.get('x-forwarded-port'),
+    proto: headers.get('x-forwarded-proto'),
+  })
+}
+
+export const config = {
+  matcher: '/headers',
+}

packages/next-swc/crates/next-dev-tests/tests/integration/next/router/middleware-forwarded-header/input/next.config.js

@@ -0,0 +1,2 @@
+/** @type {import('next').NextConfig} */
+module.exports = {}

packages/next-swc/crates/next-dev-tests/tests/integration/next/router/middleware-forwarded-header/input/pages/index.js

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+import { useTestHarness } from '@turbo/pack-test-harness'
+
+export default function Foo() {
+  useTestHarness(runTests)
+
+  return 'index'
+}
+
+function runTests() {
+  it('should stream middleware response from node', async () => {
+    const res = await fetch('/headers')
+    const json = await res.json()
+
+    const { host, port, proto } = json
+    expect(host).toBe(`localhost:${port}`)
+    expect(port).toMatch(/\d+/)
+    expect(proto).toBe('http')
+  })
+}