fix: make the warnings tests behave same on python3.10

On Python 3.10 django emits a warning (DeprecationWarning) for asyncio
run
- https://stackoverflow.com/questions/70303895/python-3-10-asyncio-gather-shows-deprecationwarning-there-is-no-current-event

We filter out this warning here, since it is not relevant to our test
and still have the tests in place so that I can check for this
behaviour.

- Github Issue: #7183

Authored-by: Vinit Kumar <vinit.kumar@socialschools.nl>
Signed-off-by: Vinit Kumar <vinit.kumar@socialschools.nl>

cms/test_utils/testcases.py

@@ -448,12 +448,21 @@ def update(self, response):
 
     def failUnlessWarns(self, category, message, f, *args, **kwargs):
         warningsShown = []
+        cleanwarningsShown = []
         result = _collectWarnings(warningsShown.append, f, *args, **kwargs)
 
         if not warningsShown:
             self.fail("No warnings emitted")
-        first = warningsShown[0]
-        for other in warningsShown[1:]:
+
+        for warning in warningsShown:
+            # this specific warning is present due to the way Django
+            # handle asyncio
+            # https://stackoverflow.com/questions/70303895/python-3-10-asyncio-gather-shows-deprecationwarning-there-is-no-current-event
+            if (warning.category != DeprecationWarning and warning.message != 'There is no current event loop'):
+                cleanwarningsShown.append(warning)
+
+        first = cleanwarningsShown[0]
+        for other in cleanwarningsShown[1:]:
             if ((other.message, other.category) != (first.message, first.category)):
                 self.fail("Can't handle different warnings")
 

cms/tests/test_plugins.py

@@ -891,20 +891,17 @@ def test_page_attribute_warns(self):
         def get_page(plugin):
             return plugin.page
 
-
-        # fails due to issue with django
-        # todo: rewrite it or upgrade django
-        # self.assertWarns(
-        #     DontUsePageAttributeWarning,
-        #     "Don't use the page attribute on CMSPlugins! CMSPlugins are not guaranteed to have a page associated with them!",
-        #     get_page, a
-        # )
-        # same as above
-        # with warnings.catch_warnings(record=True) as w:
-        #     warnings.simplefilter('always')
-        #     a.page
-        #     self.assertEqual(1, len(w))
-        #     self.assertIn('test_plugins.py', w[0].filename)
+        print(DontUsePageAttributeWarning)
+        self.assertWarns(
+            DontUsePageAttributeWarning,
+            "Don't use the page attribute on CMSPlugins! CMSPlugins are not guaranteed to have a page associated with them!",
+            get_page, a
+        )
+        with warnings.catch_warnings(record=True) as w:
+            warnings.simplefilter('always')
+            a.page
+            self.assertEqual(1, len(w))
+            self.assertIn('test_plugins.py', w[0].filename)
 
     def test_editing_plugin_changes_page_modification_time_in_sitemap(self):
         now = timezone.now()