1 files changed, 23 insertions, 0 deletions
diff --git a/Lib/unittest/test/testmock/support.py b/Lib/unittest/test/testmock/support.py
new file mode 100644
index 0000000000..f4738793b3
--- /dev/null
+++ b/Lib/unittest/test/testmock/support.py
@@ -0,0 +1,23 @@
+import sys
+
+def is_instance(obj, klass):
+    """Version of is_instance that doesn't access __class__"""
+    return issubclass(type(obj), klass)
+
+
+class SomeClass(object):
+    class_attribute = None
+
+    def wibble(self):
+        pass
+
+
+class X(object):
+    pass
+
+
+def examine_warnings(func):
+    def wrapper():
+        with catch_warnings(record=True) as ws:
+            func(ws)
+    return wrapper