A bunch of unittests for the iterator() method and interface of the

storage API.

src/ZODB/tests/IteratorStorage.py

+# Run tests against the iterator() interface for storages.  Any storage that
+# supports the iterator() method should be able to pass all these tests.
+
+from ZODB.tests.MinPO import MinPO
+from ZODB.tests.StorageTestBase import zodb_unpickle
+
+
+
+class IteratorStorage:
+    def checkSimpleIteration(self):
+        # Store a bunch of revisions of a single object
+        oid = self._storage.new_oid()
+        revid1 = self._dostore(oid, data=MinPO(11))
+        revid2 = self._dostore(oid, revid=revid1, data=MinPO(12))
+        revid3 = self._dostore(oid, revid=revid2, data=MinPO(13))
+        # Now iterate over all the transactions
+        val = 11
+        txniter = self._storage.iterator()
+        for reciter, revid in zip(txniter, (revid1, revid2, revid3)):
+            assert reciter.tid == revid
+            for rec in reciter:
+                assert rec.oid == oid
+                assert rec.serial == revid
+                assert rec.version == ''
+                assert zodb_unpickle(rec.data) == MinPO(val)
+                val += 1