Исправлено падение теста, тикет issue #187 (#208)

* fixed(dbhandler): add singlton to DBHandler class

* fix: fixed type for __instance

mod/db/dbhandler.py

@@ -69,9 +69,28 @@ class DBHandler:
                         database tables
     """
 
+    __instance: Optional['DBHandler'] = None
     _logger: Optional[str]
     _loglevel: Optional[str]
 
+    def __new__(cls, *args, **kwargs):
+        """
+        A function called when creating a new object.
+
+        If such an object already exists, returns it.
+        And if not, creates a new one.
+
+        Args:
+            cls: class DBHandler
+            *args:
+            **kwargs:
+        """
+
+        if cls.__instance is None:
+            cls.__instance = super().__new__(cls)
+
+        return cls.__instance
+
     def __init__(self,
                  uri: str = 'sqlite:/:memory:',
                  debug: bool = False,

tests/test_dbhandler.py

@@ -33,14 +33,13 @@
 
 
 class TestDBHandlerMainMethods(unittest.TestCase):
-    db: DBHandler
 
     @classmethod
     def setUpClass(cls) -> None:
         logger.remove()
-        cls.db = DBHandler(uri="sqlite:/:memory:")
 
     def setUp(self):
+        self.db = DBHandler(uri="sqlite:/:memory:")
         self.db.create_table()
 
     def tearDown(self):

tests/test_server.py

@@ -23,19 +23,34 @@
 import unittest
 
 from loguru import logger
+from mod.config.config import ConfigHandler
+from mod.db.dbhandler import DBHandler
 from server import app
 from starlette.testclient import TestClient, WebSocketTestSession
 from starlette.websockets import WebSocketDisconnect
 
 
 class TestWebsocket(unittest.TestCase):
+    config: ConfigHandler
+    config_option: ConfigHandler
+    db: DBHandler
+    ws_client: TestClient
+
     class DisconnectErr(Exception):
         pass
 
     @classmethod
     def setUpClass(cls):
         logger.remove()
         cls.ws_client = TestClient(app)
+        cls.config = ConfigHandler()
+        cls.config_option = cls.config.read()
+        cls.db = DBHandler(uri=cls.config_option.uri)
+        cls.db.create_table()
+
+    @classmethod
+    def tearDownClass(cls) -> None:
+        del cls.db
 
     def test_normal_connect(self):
         with self.ws_client.websocket_connect("/ws") as connection:
@@ -59,7 +74,6 @@ def callback():
                 connection.exit_stack.callback(callback)
                 connection.close(1006)
 
-    @unittest.skip("Not working")
     def test_send_normal_message(self):
         with self.ws_client.websocket_connect("/ws") as connection:
             connection.send_json({"type": "ping-pong",