fix: fixes the failing CI/CD test in .github/workflows/if-nodejs-pr-testing.yml across all platforms (#4735)

Co-authored-by: Shriya-Chauhan <auroralflower@gmail.com>
Co-authored-by: Ansh Goyal <anshgoyal1704@gmail.com>

Author: Shriya-Chauhan

scripts/index.ts

@@ -76,4 +76,7 @@ async function start() {
 
 export { start };
 
-start();
+/* istanbul ignore next */
+if (process.argv[1] === fileURLToPath(import.meta.url)) {
+  start();
+}

tests/index.test.ts

@@ -36,10 +36,16 @@ describe('start function', () => {
   });
 
   test('should throw an error if no finance data is found', async () => {
-    const readdirSyncSpy = jest.spyOn(fs, 'readdirSync').mockReturnValue([]);
+    const originalReaddirSync = fs.readdirSync;
+    const readdirSyncSpy = jest.spyOn(fs, 'readdirSync').mockImplementation((path) => {
+      if (typeof path === 'string' && path.includes('finance')) {
+        return [] as any;
+      }
+      return originalReaddirSync(path as any);
+    });
 
     await expect(start()).rejects.toThrow('No finance data found in the finance directory.');
-    expect(readdirSyncSpy).toHaveBeenCalledTimes(1);
+    expect(readdirSyncSpy).toHaveBeenCalledWith(expect.stringContaining('finance'));
     expect(buildFinanceInfoList).not.toHaveBeenCalled();
 
     readdirSyncSpy.mockRestore();