Test that a storage's values persist across open and close.

src/ZODB/tests/PersistentStorage.py

+"""Test that a storage's values persist across open and close."""
+
+class PersistentStorage:
+
+    def checkUpdatesPersist(self):
+        oids = []
+        
+        def new_oid_wrapper(l=oids, new_oid=self._storage.new_oid):
+            oid = new_oid()
+            l.append(oid)
+            return oid
+
+        self._storage.new_oid = new_oid_wrapper
+
+        self._dostore()
+        self._dostore('a')
+        oid = self._storage.new_oid()
+        revid = self._dostore(oid)
+        self._dostore(oid, revid, data=8, version='b')
+        oid = self._storage.new_oid()
+        revid = self._dostore(oid, data=1)
+        revid = self._dostore(oid, revid, data=2)
+        self._dostore(oid, revid, data=3)
+
+        # keep copies of all the objects
+        objects = []
+        for oid in oids:
+            p, s = self._storage.load(oid, '')
+            objects.append((oid, '', p, s))
+            ver = self._storage.modifiedInVersion(oid)
+            if ver:
+                p, s = self._storage.load(oid, ver)
+                objects.append((oid, ver, p, s))
+                
+        self._storage.close()
+        self.open()
+
+        # keep copies of all the objects
+        for oid, ver, p, s in objects:
+            _p, _s = self._storage.load(oid, ver)
+            self.assertEquals(p, _p)
+            self.assertEquals(s, _s)