Ensure persisted states even if empty

tests/test_file.py

@@ -244,18 +244,21 @@ class TestFileStore(unittest.TestCase):
 
 
     def test_factory_ls(self):
+        r = self.factory.ls()
+        self.assertEqual(len(r), 4)
+
         self.states.put('abcd')
         self.states.put('xxxx', state=self.states.BAZ)
         r = self.factory.ls()
-        self.assertEqual(len(r), 2)
+        self.assertEqual(len(r), 4)
 
         self.states.put('yyyy', state=self.states.BAZ)
         r = self.factory.ls()
-        self.assertEqual(len(r), 2)
+        self.assertEqual(len(r), 4)
 
         self.states.put('zzzz', state=self.states.BAR)
         r = self.factory.ls()
-        self.assertEqual(len(r), 3)
+        self.assertEqual(len(r), 4)
 
 
     def test_lock(self):

tests/test_state.py

@@ -323,7 +323,6 @@ class TestState(unittest.TestCase):
         states.state('FOO')
         states.put('bar')
         r = states.list(states.FOO)
-        print(r)
         self.assertEqual(len(r), 1)