first commit

2026-03-10 19:37:31 +03:30
commit 61f56f997c
27684 changed files with 2784175 additions and 0 deletions
--- a/test/development/typescript-native-preview/index.test.ts
+++ b/test/development/typescript-native-preview/index.test.ts
@@ -0,0 +1,71 @@
+import { nextTestSetup } from 'e2e-utils'
+import { retry } from 'next-test-utils'
+
+describe('typescript-native-preview', () => {
+  const { next } = nextTestSetup({
+    files: {
+      'app/layout.tsx': `
+        import { ReactNode } from 'react'
+        export default function Root({ children }: { children: ReactNode }) {
+          return (
+            <html>
+              <body>{children}</body>
+            </html>
+          )
+        }
+      `,
+      'app/page.tsx': `
+        export default function Page() {
+          return <p>hello world</p>
+        }
+      `,
+      'tsconfig.json': JSON.stringify({
+        compilerOptions: {
+          target: 'ES2017',
+          lib: ['dom', 'dom.iterable', 'esnext'],
+          allowJs: true,
+          skipLibCheck: true,
+          strict: true,
+          noEmit: true,
+          esModuleInterop: true,
+          module: 'esnext',
+          moduleResolution: 'bundler',
+          resolveJsonModule: true,
+          isolatedModules: true,
+          jsx: 'preserve',
+          incremental: true,
+          plugins: [{ name: 'next' }],
+        },
+        include: ['next-env.d.ts', '**/*.ts', '**/*.tsx'],
+        exclude: ['node_modules'],
+      }),
+    },
+    dependencies: {
+      // Explicitly exclude typescript from default dependencies
+      // so that we can test the native-preview detection
+      typescript: undefined,
+      // Install @typescript/native-preview instead of typescript
+      '@typescript/native-preview': 'latest',
+      '@types/react': 'latest',
+      '@types/node': 'latest',
+    },
+  })
+
+  it('should detect @typescript/native-preview and not auto-install typescript', async () => {
+    // The app should still work since SWC/Turbopack handles TS compilation
+    const $ = await next.render$('/')
+    expect($('p').text()).toBe('hello world')
+
+    // Wait for the info message about native-preview to be logged
+    // The TypeScript verification happens asynchronously after page render
+    await retry(() => {
+      expect(next.cliOutput).toMatch(
+        /Detected.*@typescript\/native-preview|@typescript\/native-preview.*detected/i
+      )
+    })
+
+    // Should NOT show that typescript is being installed as a dependency
+    // (it should recognize that native-preview is a valid alternative)
+    expect(next.cliOutput).not.toMatch(/Installing.*typescript[^/]/i)
+  })
+})