corrections in sqlite3 support

test/test_cache.py

@@ -12,13 +12,20 @@ from tiramisu.option import BoolOption, IPOption, IntOption, StrOption, OptionDe
 from tiramisu import Config
 from tiramisu.error import ConfigError, PropertiesOptionError
 from tiramisu.setting import groups
-from tiramisu import undefined, Params, ParamValue, ParamOption
+from tiramisu import undefined, Params, ParamValue, ParamOption, \
+                     list_sessions, default_storage, delete_session
 from tiramisu.api import TIRAMISU_VERSION
-from tiramisu.storage import list_sessions
 
 
 def teardown_function(function):
-    assert list_sessions() == [], 'session list is not empty when leaving "{}"'.format(function.__name__)
+    if default_storage.is_persistent:
+        sessions = list_sessions()
+        if not sessions:
+            return
+        assert len(sessions) == 1
+        delete_session(sessions[0])
+    else:
+        assert list_sessions() == [], 'session list is not empty when leaving "{}"'.format(function.__name__)
 
 
 global incr

test/test_choice_option.py

@@ -5,8 +5,7 @@ from .autopath import do_autopath
 do_autopath()
 
 from tiramisu.setting import owners
-from tiramisu.option import ChoiceOption, StrOption, OptionDescription
-from tiramisu import Config
+from tiramisu import ChoiceOption, StrOption, OptionDescription, Config
 from tiramisu.error import ConfigError
 from tiramisu import undefined, Params, ParamValue, ParamOption
 from tiramisu.api import TIRAMISU_VERSION