Handle warnings in unittest marker

Author: XuehaiPan

Lib/test/support/__init__.py

@@ -877,6 +877,12 @@ def check_bolt_optimized():
     return '--enable-bolt' in config_args
 
 
+with warnings.catch_warnings():
+    # ignore DeprecationWarning on sys.abiflags change on Windows
+    warnings.simplefilter('ignore', DeprecationWarning)
+    HAS_SYS_ABIFLAGS = hasattr(sys, 'abiflags')  # equal to `not sys.platform.startswith('win')`
+
+
 Py_GIL_DISABLED = bool(sysconfig.get_config_var('Py_GIL_DISABLED'))
 
 def requires_gil_enabled(msg="needs the GIL enabled"):

Lib/test/test_sys.py

@@ -1355,7 +1355,7 @@ def test_pystats(self):
         sys._stats_dump()
 
     @test.support.cpython_only
-    @unittest.skipUnless(hasattr(sys, 'abiflags'), 'need sys.abiflags')
+    @unittest.skipUnless(support.HAS_SYS_ABIFLAGS, 'need sys.abiflags')
     def test_disable_gil_abi(self):
         self.assertEqual('t' in sys.abiflags, support.Py_GIL_DISABLED)