add tearDown and clear module cache

sunmy2019 · sunmy2019 · commit ae456496a96d · 2023-05-06T04:15:43.000Z
diff --git a/Lib/test/test_importlib/extension/test_loader.py b/Lib/test/test_importlib/extension/test_loader.py
@@ -113,6 +113,12 @@ def setUp(self):
         self.loader = self.machinery.ExtensionFileLoader(
             self.name, self.spec.origin)
 
+    def tearDown(self):
+        try:
+            del sys.modules[self.name]
+        except KeyError:
+            pass
+
     def load_module(self):
         with warnings.catch_warnings():
             warnings.simplefilter("ignore", DeprecationWarning)
@@ -194,6 +200,12 @@ def setUp(self):
         self.loader = self.machinery.ExtensionFileLoader(
             self.name, self.spec.origin)
 
+    def tearDown(self):
+        try:
+            del sys.modules[self.name]
+        except KeyError:
+            pass
+
     def load_module(self):
         # Load the module from the test extension.
         with warnings.catch_warnings():
@@ -262,15 +274,16 @@ def test_reload(self):
 
     def test_try_registration(self):
         # Assert that the PyState_{Find,Add,Remove}Module C API doesn't work.
-        module = self.load_module()
-        with self.subTest('PyState_FindModule'):
-            self.assertEqual(module.call_state_registration_func(0), None)
-        with self.subTest('PyState_AddModule'):
-            with self.assertRaises(SystemError):
-                module.call_state_registration_func(1)
-        with self.subTest('PyState_RemoveModule'):
-            with self.assertRaises(SystemError):
-                module.call_state_registration_func(2)
+        with util.uncache(self.name):
+            module = self.load_module()
+            with self.subTest('PyState_FindModule'):
+                self.assertEqual(module.call_state_registration_func(0), None)
+            with self.subTest('PyState_AddModule'):
+                with self.assertRaises(SystemError):
+                    module.call_state_registration_func(1)
+            with self.subTest('PyState_RemoveModule'):
+                with self.assertRaises(SystemError):
+                    module.call_state_registration_func(2)
 
     def test_load_submodule(self):
         # Test loading a simulated submodule.
