Refs #34986 -- Moved garbage_collect() helper to django.test.utils.

django/test/utils.py

@@ -1,4 +1,5 @@
 import collections
+import gc
 import logging
 import os
 import re
@@ -27,6 +28,7 @@ from django.template import Template
 from django.test.signals import template_rendered
 from django.urls import get_script_prefix, set_script_prefix
 from django.utils.translation import deactivate
+from django.utils.version import PYPY
 
 try:
     import jinja2
@@ -38,6 +40,7 @@ __all__ = (
     "Approximate",
     "ContextList",
     "isolate_lru_cache",
+    "garbage_collect",
     "get_runner",
     "CaptureQueriesContext",
     "ignore_warnings",
@@ -982,3 +985,10 @@ def register_lookup(field, *lookups, lookup_name=None):
     finally:
         for lookup in lookups:
             field._unregister_lookup(lookup, lookup_name)
+
+
+def garbage_collect():
+    gc.collect()
+    if PYPY:
+        # Collecting weakreferences can take two collections on PyPy.
+        gc.collect()

tests/dispatch/tests.py

@@ -1,23 +1,9 @@
-import gc
 import weakref
 from types import TracebackType
 
 from django.dispatch import Signal, receiver
 from django.test import SimpleTestCase
-from django.test.utils import override_settings
+from django.test.utils import garbage_collect, override_settings
-from django.utils.version import PYPY
-
-if PYPY:
-
-    def garbage_collect():
-        # Collecting weakreferences can take two collections on PyPy.
-        gc.collect()
-        gc.collect()
-
-else:
-
-    def garbage_collect():
-        gc.collect()
 
 
 def receiver_1_arg(val, **kwargs):