Use binary pickles to deal with new oids generated by demo storage.

Added a new test class for testing packing without gc.

Moved some useful tests to PackableStorage so they are run by storages
without undo.

src/ZEO/tests/testZEO.py

@@ -418,6 +418,7 @@ class DemoStorageTests(
 
     def checkPackWithMultiDatabaseReferences(self):
         pass # DemoStorage pack doesn't do gc
+    checkPackAllRevisions = checkPackWithMultiDatabaseReferences
 
 class HeartbeatTests(ZEO.tests.ConnectionTests.CommonSetupTearDown):
     """Make sure a heartbeat is being sent and that it does no harm

src/ZODB/tests/PackableStorage.py

@@ -86,7 +86,7 @@ def dumps(obj):
             return obj.getoid()
         return None
     s = StringIO()
-    p = pickle.Pickler(s)
+    p = pickle.Pickler(s, 1)
     p.persistent_id = getpersid
     p.dump(obj)
     p.dump(None)
@@ -323,11 +323,6 @@ class PackableStorage(PackableStorageBase):
         db.pack(time.time()+1)
         self.assertEqual(len(self._storage), 1)
 
-        
-        
-
-class PackableUndoStorage(PackableStorageBase):
-
     def checkPackAllRevisions(self):
         self._initroot()
         eq = self.assertEqual
@@ -443,11 +438,9 @@ class PackableUndoStorage(PackableStorageBase):
         # Create a persistent object, with some initial state
         obj1 = self._newobj()
         oid1 = obj1.getoid()
-        # Create another persistent object, with some initial state.  Make
-        # sure it's oid is greater than the first object's oid.
+        # Create another persistent object, with some initial state.
         obj2 = self._newobj()
         oid2 = obj2.getoid()
-        self.failUnless(oid2 > oid1)
         # Link the root object to the persistent objects, in order to keep
         # them alive.  Store the root object.
         root.obj1 = obj1
@@ -517,6 +510,50 @@ class PackableUndoStorage(PackableStorageBase):
         eq(pobj.getoid(), oid2)
         eq(pobj.value, 11)
 
+class PackableStorageWithOptionalGC(PackableStorage):
+
+    def checkPackAllRevisionsNoGC(self):
+        self._initroot()
+        eq = self.assertEqual
+        raises = self.assertRaises
+        # Create a `persistent' object
+        obj = self._newobj()
+        oid = obj.getoid()
+        obj.value = 1
+        # Commit three different revisions
+        revid1 = self._dostoreNP(oid, data=pdumps(obj))
+        obj.value = 2
+        revid2 = self._dostoreNP(oid, revid=revid1, data=pdumps(obj))
+        obj.value = 3
+        revid3 = self._dostoreNP(oid, revid=revid2, data=pdumps(obj))
+        # Now make sure all three revisions can be extracted
+        data = self._storage.loadSerial(oid, revid1)
+        pobj = pickle.loads(data)
+        eq(pobj.getoid(), oid)
+        eq(pobj.value, 1)
+        data = self._storage.loadSerial(oid, revid2)
+        pobj = pickle.loads(data)
+        eq(pobj.getoid(), oid)
+        eq(pobj.value, 2)
+        data = self._storage.loadSerial(oid, revid3)
+        pobj = pickle.loads(data)
+        eq(pobj.getoid(), oid)
+        eq(pobj.value, 3)
+        # Now pack all transactions; need to sleep a second to make
+        # sure that the pack time is greater than the last commit time.
+        now = packtime = time.time()
+        while packtime <= now:
+            packtime = time.time()
+        self._storage.pack(packtime, referencesf, gc=False)
+        # Only old revisions of the object should be gone. We don't gc
+        raises(KeyError, self._storage.loadSerial, oid, revid1)
+        raises(KeyError, self._storage.loadSerial, oid, revid2)
+        self._storage.loadSerial(oid, revid3)
+        
+        
+
+class PackableUndoStorage(PackableStorageBase):
+
     def checkPackUnlinkedFromRoot(self):
         eq = self.assertEqual
         db = DB(self._storage)

src/ZODB/tests/testDemoStorage.py

@@ -77,8 +77,6 @@ class DemoStorageTests(
         pass # we don't support undo yet
     checkUndoZombie = checkLoadBeforeUndo
 
-    def checkPackWithMultiDatabaseReferences(self):
-        pass # we never do gc
         
 class DemoStorageWrappedBase(DemoStorageTests):
 
@@ -94,6 +92,13 @@ class DemoStorageWrappedBase(DemoStorageTests):
     def _makeBaseStorage(self):
         raise NotImplementedError
 
+    def checkPackOnlyOneObject(self):
+        pass # Wrapping demo storages don't do gc 
+
+    def checkPackWithMultiDatabaseReferences(self):
+        pass # we never do gc
+    checkPackAllRevisions = checkPackWithMultiDatabaseReferences
+
 class DemoStorageWrappedAroundMappingStorage(DemoStorageWrappedBase):
 
     def _makeBaseStorage(self):

src/ZODB/tests/testMappingStorage.py

@@ -34,7 +34,7 @@ class MappingStorageTests(
     IteratorStorage.ExtendedIteratorStorage,
     IteratorStorage.IteratorStorage,
     MTStorage.MTStorage,
-    PackableStorage.PackableStorage,
+    PackableStorage.PackableStorageWithOptionalGC,
     RevisionStorage.RevisionStorage,
     Synchronization.SynchronizedStorage,
     ):