Add a test in test_free_threading (by Ken)

Author: ZeroIntensity

Lib/test/test_free_threading/test_generators.py

@@ -0,0 +1,23 @@
+import unittest
+import concurrent.futures
+
+from unittest import TestCase
+
+from test.support import threading_helper
+
+@threading_helper.requires_working_threading()
+class TestGen(TestCase):
+    def test_generators_basic(self):
+        def gen():
+            for _ in range(5000):
+                yield
+
+
+        it = gen()
+        with concurrent.futures.ThreadPoolExecutor() as executor:
+            for _ in range(5000):
+                executor.submit(lambda: next(it))
+
+
+if __name__ == "__main__":
+    unittest.main()