Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/swr/dist/immutable/index.mjs

@@ -0,0 +1,14 @@
+import useSWR from '../index/index.mjs';
+import { withMiddleware } from '../_internal/index.mjs';
+
+const immutable = (useSWRNext)=>(key, fetcher, config)=>{
+        // Always override all revalidate options.
+        config.revalidateOnFocus = false;
+        config.revalidateIfStale = false;
+        config.revalidateOnReconnect = false;
+        config.refreshInterval = 0;
+        return useSWRNext(key, fetcher, config);
+    };
+const useSWRImmutable = withMiddleware(useSWR, immutable);
+
+export { useSWRImmutable as default, immutable };