[Checkins] SVN: zope.component/branches/wosc-test-stacking/src/zope/component/ Snapshot: Fix persistence test, so that it actually exercises persitence. Now it breaks, of course.

[Wolfgang Schnerring]

Log message for revision 121969:
  Snapshot: Fix persistence test, so that it actually exercises persitence. Now it breaks, of course.
  

Changed:
  U   zope.component/branches/wosc-test-stacking/src/zope/component/stackable.py
  U   zope.component/branches/wosc-test-stacking/src/zope/component/tests.py

-=-
Modified: zope.component/branches/wosc-test-stacking/src/zope/component/stackable.py
===================================================================
--- zope.component/branches/wosc-test-stacking/src/zope/component/stackable.py	2011-06-23 11:18:41 UTC (rev 121968)
+++ zope.component/branches/wosc-test-stacking/src/zope/component/stackable.py	2011-06-23 12:17:12 UTC (rev 121969)
@@ -4,8 +4,9 @@
 
 class StackableBase(object):
 
-    def __init__(self, original):
-        self.stack = [original]
+    def __init__(self, original=None):
+        if original is not None:
+            self.stack = [original]
 
     def push(self):
         self.stack.append(copy.copy(self.stack[-1]))

Modified: zope.component/branches/wosc-test-stacking/src/zope/component/tests.py
===================================================================
--- zope.component/branches/wosc-test-stacking/src/zope/component/tests.py	2011-06-23 11:18:41 UTC (rev 121968)
+++ zope.component/branches/wosc-test-stacking/src/zope/component/tests.py	2011-06-23 12:17:12 UTC (rev 121969)
@@ -1725,14 +1725,23 @@
     def test_is_persistable(self):
         import tempfile
         import ZODB
-        tmpfile = tempfile.NamedTemporaryFile(delete=True)
-        root = ZODB.DB(tmpfile.name).open().root()
+        # XXX delete tempfile, or rather, don't use FileStorage at all, use
+        # DemoStorage instead
+        tmpfile = tempfile.NamedTemporaryFile()
+        db = ZODB.DB(tmpfile.name)
+        root = db.open().root()
         orig = [1]
         stack = zope.component.stackable.stackable(orig)
         root['stack'] = stack
         zope.component.stackable.push()
         stack.append(2)
         transaction.commit()
+
+        # force deserialization
+        db.close()
+        db = ZODB.DB(tmpfile.name)
+        root = db.open().root()
+
         stack = root['stack']
         self.assertEqual([1, 2], stack)
         zope.component.stackable.pop()