many improvment

test/test_storage.py

@@ -271,3 +271,22 @@ def test_two_different_persistents():
 
         delete_session('config', 'test_persistent')
         delete_session('config', 'test_persistent2')
+
+
+def test_two_different_information():
+    b = BoolOption('b', '')
+    o = OptionDescription('od', '', [b])
+    try:
+        c = Config(o, session_id='test_persistent', persistent=True)
+        c.impl_set_information('a', 'a')
+        d = Config(o, session_id='test_persistent2', persistent=True)
+        d.impl_set_information('a', 'b')
+    except ValueError:
+        # storage is not persistent
+        pass
+    else:
+        assert c.impl_get_information('a') == 'a'
+        assert d.impl_get_information('a') == 'b'
+
+        delete_session('config', 'test_persistent')
+        delete_session('config', 'test_persistent2')