Rearrage test location, skip fork test on windows

Author: zangjiucheng

Lib/test/test_thread.py

@@ -337,18 +337,6 @@ def func():
             handle = thread.start_joinable_thread(func, handle=None)
             handle.join()
 
-    def test_forked_not_started(self):
-        handle = thread._ThreadHandle()
-        pid = os.fork()
-        if pid == 0:
-            # child process
-            try:
-                self.assertTrue(handle.is_alive())
-                self.assertFalse(handle.is_done())
-            finally:
-                os._exit(0)
-        else:
-            support.wait_process(pid, exitcode=0)
 
 class Barrier:
     def __init__(self, num_threads):
@@ -451,6 +439,21 @@ def fork_thread(read_fd, write_fd):
         self.assertIsNotNone(pid)
         support.wait_process(pid, exitcode=0)
 
+    @support.requires_fork()
+    @threading_helper.reap_threads
+    def test_forked_not_started(self):
+        handle = thread._ThreadHandle()
+        pid = os.fork()
+        if pid == 0:
+            # child process
+            try:
+                self.assertTrue(handle.is_alive())
+                self.assertFalse(handle.is_done())
+            finally:
+                os._exit(0)
+        else:
+            support.wait_process(pid, exitcode=0)
+
     def tearDown(self):
         try:
             os.close(self.read_fd)