Disable assertion iff running under coverage

Fixes #28
zopefoundation · Jan 12, 2015 · a130173 · a130173
1 parent 9811ff9
commit a130173
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/ZODB/tests/testCache.py b/src/ZODB/tests/testCache.py
@@ -364,7 +364,12 @@ def add(key, obj):
         # same object, different keys
         self.assertRaises(ValueError, add, p64(0), o)
 
-        self.assertEqual(sys.getrefcount(None), nones)
+        if sys.gettrace() is None:
+            # 'coverage' keeps track of coverage information in a data
+            # structure that adds a new reference to None for each executed
+            # line of code, which interferes with this test.  So check it
+            # only if we're running without coverage tracing.
+            self.assertEqual(sys.getrefcount(None), nones)
 
     def testTwoCaches(self):
         jar2 = StubDataManager()