add a test

ztanner · ztanner · commit 3a433590bc10 · 2025-08-13T07:41:27.000-07:00
diff --git a/test/e2e/deprecation-warnings/deprecation-warnings.test.ts b/test/e2e/deprecation-warnings/deprecation-warnings.test.ts
@@ -0,0 +1,40 @@
+import { nextTestSetup } from 'e2e-utils'
+import path from 'path'
+
+describe('deprecation-warnings', () => {
+  describe('without next.config.js', () => {
+    const { next } = nextTestSetup({
+      files: path.join(__dirname, 'fixtures/no-config'),
+      skipStart: true,
+    })
+
+    it('should not emit any deprecation warnings when no config file exists', async () => {
+      await next.start()
+
+      const logs = next.cliOutput
+      expect(logs).not.toContain('deprecated')
+      expect(logs).not.toContain('has been renamed')
+      expect(logs).not.toContain('no longer needed')
+    })
+  })
+
+  describe('with deprecated config options', () => {
+    const { next } = nextTestSetup({
+      files: path.join(__dirname, 'fixtures/with-deprecated-config'),
+      skipStart: true,
+    })
+
+    it('should emit deprecation warnings for explicitly configured deprecated options', async () => {
+      await next.start()
+
+      const logs = next.cliOutput
+
+      // Should warn about amp configuration
+      expect(logs).toContain('Built-in amp support is deprecated')
+
+      // Should warn about experimental.instrumentationHook
+      expect(logs).toContain('experimental.instrumentationHook')
+      expect(logs).toContain('no longer needed')
+    })
+  })
+})
diff --git a/test/e2e/deprecation-warnings/fixtures/no-config/app/layout.tsx b/test/e2e/deprecation-warnings/fixtures/no-config/app/layout.tsx
@@ -0,0 +1,11 @@
+export default function RootLayout({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  return (
+    <html lang="en">
+      <body>{children}</body>
+    </html>
+  )
+}
diff --git a/test/e2e/deprecation-warnings/fixtures/no-config/app/page.tsx b/test/e2e/deprecation-warnings/fixtures/no-config/app/page.tsx
@@ -0,0 +1,3 @@
+export default function Page() {
+  return <div>Hello World</div>
+}
diff --git a/test/e2e/deprecation-warnings/fixtures/with-deprecated-config/app/layout.tsx b/test/e2e/deprecation-warnings/fixtures/with-deprecated-config/app/layout.tsx
@@ -0,0 +1,11 @@
+export default function RootLayout({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  return (
+    <html lang="en">
+      <body>{children}</body>
+    </html>
+  )
+}
diff --git a/test/e2e/deprecation-warnings/fixtures/with-deprecated-config/app/page.tsx b/test/e2e/deprecation-warnings/fixtures/with-deprecated-config/app/page.tsx
@@ -0,0 +1,3 @@
+export default function Page() {
+  return <div>Hello World</div>
+}
diff --git a/test/e2e/deprecation-warnings/fixtures/with-deprecated-config/next.config.js b/test/e2e/deprecation-warnings/fixtures/with-deprecated-config/next.config.js
@@ -0,0 +1,9 @@
+module.exports = {
+  // Explicitly configure deprecated options
+  amp: {
+    canonicalBase: 'https://example.com',
+  },
+  experimental: {
+    instrumentationHook: true,
+  },
+}

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+export default function Page() {`
	`2`	`+ return <div>Hello World</div>`
	`3`	`+}`