Update _test_multiprocessing.py

Author: Shrey-N

Lib/test/_test_multiprocessing.py

@@ -3889,6 +3889,16 @@ def test_context(self):
             self.assertTrue(b.closed)
             self.assertRaises(OSError, a.recv)
             self.assertRaises(OSError, b.recv)
+            
+    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
+    def test_wait_empty(self):
+        # gh-145587: wait() with empty list should respect timeout
+        timeout = 0.5
+        start = time.monotonic()
+        res = self.connection.wait([], timeout=timeout)
+        duration = time.monotonic() - start
+        self.assertEqual(res, [])
+        self.assertGreaterEqual(duration, timeout - 0.1)
 
 class _TestListener(BaseTestCase):