test: case for cache key conflict (2)

Author: hydrati

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

@@ -376,7 +376,31 @@ h1 { color: red }
       expect(descriptor.scriptSetup?.lang).toBe('tsx')
     })
 
-    test('source cache key conflict', () => {
+    test('source cache key conflict when default lang="undefined"', () => {
+      expect(
+        parse(
+          `
+        <script>console.log(0x011)</script>
+        <script setup>console.log(0x011)</script>
+        `,
+          {
+            defaultScriptLang: 'undefined'
+          }
+        ).errors.length
+      ).toBe(0)
+
+      const { descriptor, errors } = parse(
+        `
+        <script>console.log(0x011)</script>
+        <script setup>console.log(0x011)</script>
+        `
+      )
+      expect(errors.length).toBe(0)
+      expect(descriptor.script?.lang).toBeUndefined()
+      expect(descriptor.scriptSetup?.lang).toBeUndefined()
+    })
+
+    test('source cache key conflict when default lang=""', () => {
       expect(
         parse(
           `