fixed logfile creation issue

tests/test_testdata.py

@@ -102,15 +102,29 @@ def test_invalid_api_key(_server):
     'database-update-interval': 0.1
 })], indirect=['_server'])
 def test_check_database_update(_server):
+    import importlib.metadata
+    from datetime import datetime
+
     database = _server
 
     with open(database, 'r', encoding='utf-8') as file:
         file.seek(0)
-        assert json.load(file) == {'data-used': 0}
+        today = datetime.today()
+        assert json.load(file) == {
+            'version': importlib.metadata.version('testdata'),
+            'data-used': {
+                f'{today.year}-{today.month:02}': 0
+            }
+        }
 
         response = requests.get(f'{PROTOCOL}://{HOST}:{PORT}/zeros?api_key=one&size=100', timeout=TIMEOUT)
         assert response.status_code == 200
 
         time.sleep(0.1)
         file.seek(0)
-        assert json.load(file) == {'data-used': 100}
+        assert json.load(file) == {
+            'version': importlib.metadata.version('testdata'),
+            'data-used': {
+                f'{today.year}-{today.month:02}': 100
+            }
+        }