test(compiler-core): add test for identifier collision

Author: znck

packages/compiler-sfc/__tests__/rewriteDefault.spec.ts

@@ -191,6 +191,18 @@ describe('compiler sfc: rewriteDefault', () => {
           export { bar,    } from './index.js'
           const script = foo"
         `)
+
+    expect(
+      compileRewriteDefault(
+        `export { foo as default } from './index.js' \n const foo = 1`,
+        'script'
+      )
+    ).toMatchInlineSnapshot(`
+      "import { foo } from './index.js'
+      export {  } from './index.js' 
+       const foo = 1
+      const script = foo"
+    `)
   })
 
   test('export default class', async () => {