Avoided changing raw DeprecationWarning filter behavior

Refs #21188. Now pure Python DeprecationWarning visibility should
be back to Python defaults.

django/utils/deprecation.py

@@ -10,6 +10,9 @@ class RemovedInDjango18Warning(DeprecationWarning):
     pass
 
 
+RemovedInNextVersionWarning = RemovedInDjango18Warning
+
+
 class warn_about_renamed_method(object):
     def __init__(self, class_name, old_method_name, new_method_name, deprecation_warning):
         self.class_name = class_name

django/utils/log.py

@@ -5,6 +5,7 @@ import warnings
 from django.conf import settings
 from django.core import mail
 from django.core.mail import get_connection
+from django.utils.deprecation import RemovedInNextVersionWarning
 from django.utils.module_loading import import_string
 from django.views.debug import ExceptionReporter, get_exception_reporter_filter
 
@@ -68,8 +69,9 @@ def configure_logging(logging_config, logging_settings):
     if not sys.warnoptions:
         # Route warnings through python logging
         logging.captureWarnings(True)
-        # Allow DeprecationWarnings through the warnings filters
-        warnings.simplefilter("default", DeprecationWarning)
+        # RemovedInNextVersionWarning is a subclass of DeprecationWarning which
+        # is hidden by default, hence we force the "default" behavior
+        warnings.simplefilter("default", RemovedInNextVersionWarning)
 
     if logging_config:
          # First find the logging configuration function ...

tests/logging_tests/tests.py

@@ -7,6 +7,7 @@ from django.core import mail
 from django.test import TestCase, RequestFactory, override_settings
 from django.test.utils import patch_logger
 from django.utils.encoding import force_text
+from django.utils.deprecation import RemovedInNextVersionWarning
 from django.utils.log import (CallbackFilter, RequireDebugFalse,
     RequireDebugTrue)
 from django.utils.six import StringIO
@@ -86,8 +87,8 @@ class DefaultLoggingTest(TestCase):
 
 class WarningLoggerTests(TestCase):
     """
-    Tests that warnings output for DeprecationWarnings is enabled
-    and captured to the logging system
+    Tests that warnings output for RemovedInDjangoXXWarning (XX being the next
+    Django version) is enabled and captured to the logging system
     """
     def setUp(self):
         # If tests are invoke with "-Wall" (or any -W flag actually) then
@@ -118,12 +119,12 @@ class WarningLoggerTests(TestCase):
 
     @override_settings(DEBUG=True)
     def test_warnings_capture(self):
-        warnings.warn('Foo Deprecated', DeprecationWarning)
+        warnings.warn('Foo Deprecated', RemovedInNextVersionWarning)
         output = force_text(self.outputs[0].getvalue())
         self.assertTrue('Foo Deprecated' in output)
 
     def test_warnings_capture_debug_false(self):
-        warnings.warn('Foo Deprecated', DeprecationWarning)
+        warnings.warn('Foo Deprecated', RemovedInNextVersionWarning)
         output = force_text(self.outputs[0].getvalue())
         self.assertFalse('Foo Deprecated' in output)
 

tests/test_runner/tests.py

@@ -13,6 +13,7 @@ from django import db
 from django.test import runner, TestCase, TransactionTestCase, skipUnlessDBFeature
 from django.test.testcases import connections_support_transactions
 from django.test.utils import IgnoreAllDeprecationWarningsMixin, override_system_checks
+from django.utils import six
 
 from admin_scripts.tests import AdminScriptTestCase
 from .models import Person
@@ -368,14 +369,14 @@ class DeprecationDisplayTest(AdminScriptTestCase):
         args = ['test', '--settings=test_project.settings', 'test_runner_deprecation_app']
         out, err = self.run_django_admin(args)
         self.assertIn("Ran 1 test", err)
-        self.assertIn("DeprecationWarning: warning from test", err)
-        self.assertIn("DeprecationWarning: module-level warning from deprecation_app", err)
+        six.assertRegex(self, err, r"RemovedInDjango\d\dWarning: warning from test")
+        six.assertRegex(self, err, r"RemovedInDjango\d\dWarning: module-level warning from deprecation_app")
 
     def test_runner_deprecation_verbosity_zero(self):
         args = ['test', '--settings=test_project.settings', '--verbosity=0', 'test_runner_deprecation_app']
         out, err = self.run_django_admin(args)
         self.assertIn("Ran 1 test", err)
-        self.assertFalse("DeprecationWarning: warning from test" in err)
+        self.assertFalse("warning from test" in err)
 
 
 class AutoIncrementResetTest(TransactionTestCase):

tests/test_runner_deprecation_app/tests.py

 import warnings
 
 from django.test import TestCase
+from django.utils.deprecation import RemovedInNextVersionWarning
 
-warnings.warn("module-level warning from deprecation_app", DeprecationWarning)
+warnings.warn("module-level warning from deprecation_app", RemovedInNextVersionWarning)
 
 
 class DummyTest(TestCase):
     def test_warn(self):
-        warnings.warn("warning from test", DeprecationWarning)
+        warnings.warn("warning from test", RemovedInNextVersionWarning)