silence the warning in more tests.

Author: gpshead

Lib/test/fork_wait.py

@@ -13,6 +13,7 @@
 import threading
 from test import support
 from test.support import threading_helper
+import warnings
 
 
 LONGSLEEP = 2
@@ -63,19 +64,17 @@ def test_wait(self):
 
         prefork_lives = self.alive.copy()
 
-        if sys.platform in ['unixware7']:
-            cpid = os.fork1()
-        else:
-            cpid = os.fork()
-
-        if cpid == 0:
-            # Child
-            time.sleep(LONGSLEEP)
-            n = 0
-            for key in self.alive:
-                if self.alive[key] != prefork_lives[key]:
-                    n += 1
-            os._exit(n)
-        else:
-            # Parent
-            self.wait_impl(cpid, exitcode=0)
+        # Ignore the warning about fork with threads.
+        with warnings.catch_warnings(category=DeprecationWarning,
+                                     action="ignore"):
+            if (cpid := os.fork()) == 0:
+                # Child
+                time.sleep(LONGSLEEP)
+                n = 0
+                for key in self.alive:
+                    if self.alive[key] != prefork_lives[key]:
+                        n += 1
+                os._exit(n)
+            else:
+                # Parent
+                self.wait_impl(cpid, exitcode=0)

Lib/test/test_thread.py

@@ -5,6 +5,7 @@
 from test.support import threading_helper
 import _thread as thread
 import time
+import warnings
 import weakref
 
 from test import lock_tests
@@ -238,11 +239,13 @@ def test_forkinthread(self):
         def fork_thread(read_fd, write_fd):
             nonlocal pid
 
-            # fork in a thread
-            pid = os.fork()
-            if pid:
-                # parent process
-                return
+            # Ignore the warning about fork with threads.
+            with warnings.catch_warnings(category=DeprecationWarning,
+                                         action="ignore"):
+                # fork in a thread (DANGER, undefined per POSIX)
+                if (pid := os.fork()):
+                    # parent process
+                    return
 
             # child process
             try:

Lib/test/test_threading.py

@@ -604,13 +604,15 @@ def test_is_alive_after_fork(self):
         for i in range(20):
             t = threading.Thread(target=lambda: None)
             t.start()
-            pid = os.fork()
-            if pid == 0:
-                os._exit(11 if t.is_alive() else 10)
-            else:
-                t.join()
+            # Ignore the warning about fork with threads.
+            with warnings.catch_warnings(category=DeprecationWarning,
+                                         action="ignore"):
+                if (pid := os.fork()) == 0:
+                    os._exit(11 if t.is_alive() else 10)
+                else:
+                    t.join()
 
-                support.wait_process(pid, exitcode=10)
+                    support.wait_process(pid, exitcode=10)
 
     def test_main_thread(self):
         main = threading.main_thread()