Merge pull request #3171 from bradleymarques/fix-cache-not-clearing-with-evennia-test-case

Fix Django ID cache not being flushed in EvenniaTestCase

docs/source/Coding/Unit-Testing.md

@@ -106,7 +106,7 @@ To test this, run
 
 to run the entire test module
 
-    evennia test --settings setings.py world.tests
+    evennia test --settings settings.py world.tests
 
 or a specific class:
 

evennia/utils/test_resources.py

@@ -558,9 +558,19 @@ class EvenniaTestCase(TestCase):
     """
     For use with gamedir settings; Just like the normal test case, only for naming consistency.
 
+    Notes:
+
+    -   Inheriting from this class will bypass EvenniaTestMixin, and therefore
+        not setup some default objects. This can result in faster tests.
+
+    -   If you do inherit from this class for your unit tests, and have
+        overridden the tearDown() method, please also call flush_cache(). Not
+        doing so will result in flakey and order-dependent tests due to the
+        Django ID cache not being flushed.
     """
 
-    pass
+    def tearDown(self) -> None:
+        flush_cache()
 
 
 @override_settings(**DEFAULT_SETTINGS)