Merge e52a66a into d48f1bc

crates/next-dev-tests/tests/integration/next/router/headers/input/next.config.js

@@ -0,0 +1,16 @@
+/** @type {import('next').NextConfig} */
+module.exports = {
+  async headers() {
+    return [
+      {
+        source: "/foo",
+        headers: [
+          {
+            key: "x-foo",
+            value: "bar",
+          },
+        ],
+      },
+    ];
+  },
+};

crates/next-dev-tests/tests/integration/next/router/headers/input/pages/foo.js

@@ -0,0 +1,3 @@
+export default function Foo() {
+  return "check x-foo header";
+}

crates/next-dev-tests/tests/integration/next/router/headers/input/pages/index.js

@@ -0,0 +1,17 @@
+import { useEffect } from "react";
+
+export default function Foo() {
+  useEffect(() => {
+    // Only run on client
+    import("@turbo/pack-test-harness").then(runTests);
+  });
+
+  return "index";
+}
+
+function runTests() {
+  it("should set header onto response", async () => {
+    const res = await fetch("/foo");
+    expect(res.headers.get("x-foo")).toBe("bar");
+  });
+}