fix test_scopes.py (Empty scopes are None, not "")

Author: dieser-niko

tests/unit/test_scopes.py

@@ -19,9 +19,9 @@ def test_empty_scope(self):
         normalized_scope_string = self.normalize_scope(scopes)
         normalized_scope_string_2 = self.normalize_scope(scope_string)
 
-        self.assertEqual(scope_string, "")
-        self.assertEqual(normalized_scope_string, "")
-        self.assertEqual(normalized_scope_string_2, "")
+        self.assertEqual(scope_string, None)
+        self.assertEqual(normalized_scope_string, None)
+        self.assertEqual(normalized_scope_string_2, None)
 
         converted_scopes = Scope.from_string(scope_string)
         self.assertEqual(converted_scopes, set())