Use AsyncMock with python 3.8 instead of asynctest

tests/test_api/test_client/test_base_bot.py

@@ -1,12 +1,14 @@
-import copy
-
 import pytest
-from asynctest import CoroutineMock, patch
 
 from aiogram.api.client.base import BaseBot
 from aiogram.api.client.session.aiohttp import AiohttpSession
 from aiogram.api.methods import GetMe
 
+try:
+    from asynctest import CoroutineMock, patch
+except ImportError:
+    from unittest.mock import AsyncMock as CoroutineMock, patch
+
 
 class TestBaseBot:
     def test_init(self):

tests/test_api/test_client/test_session/test_aiohttp_session.py

@@ -4,12 +4,16 @@ from typing import AsyncContextManager
 import aiohttp
 import pytest
 from aresponses import ResponsesMockServer
-from asynctest import CoroutineMock, patch
 
 from aiogram.api.client.session.aiohttp import AiohttpSession
 from aiogram.api.methods import Request, TelegramMethod
 from aiogram.api.types import InputFile
 
+try:
+    from asynctest import CoroutineMock, patch
+except ImportError:
+    from unittest.mock import AsyncMock as CoroutineMock, patch
+
 
 class BareInputFile(InputFile):
     async def read(self, chunk_size: int):

tests/test_api/test_client/test_session/test_base_session.py

@@ -2,13 +2,17 @@ import datetime
 from typing import AsyncContextManager
 
 import pytest
-from asynctest import CoroutineMock, patch
 
 from aiogram.api.client.session.base import BaseSession, T
 from aiogram.api.client.telegram import PRODUCTION, TelegramAPIServer
 from aiogram.api.methods import GetMe, Response, TelegramMethod
 from aiogram.utils.mixins import DataMixin
 
+try:
+    from asynctest import CoroutineMock, patch
+except ImportError:
+    from unittest.mock import AsyncMock as CoroutineMock, patch
+
 
 class CustomSession(BaseSession):
     async def close(self):

tests/test_dispatcher/test_dispatcher.py

@@ -2,7 +2,6 @@ import datetime
 import time
 
 import pytest
-from asynctest import CoroutineMock, patch
 
 from aiogram import Bot
 from aiogram.api.methods import GetMe, GetUpdates, SendMessage
@@ -11,6 +10,11 @@ from aiogram.dispatcher.dispatcher import Dispatcher
 from aiogram.dispatcher.router import Router
 from tests.mocked_bot import MockedBot
 
+try:
+    from asynctest import CoroutineMock, patch
+except ImportError:
+    from unittest.mock import AsyncMock as CoroutineMock, patch
+
 
 class TestDispatcher:
     def test_parent_router(self):

tests/test_dispatcher/test_filters/test_base.py

@@ -1,11 +1,14 @@
 from typing import Awaitable
-from unittest.mock import patch
 
 import pytest
-from asynctest import CoroutineMock
 
 from aiogram.dispatcher.filters.base import BaseFilter
 
+try:
+    from asynctest import CoroutineMock, patch
+except ImportError:
+    from unittest.mock import AsyncMock as CoroutineMock, patch
+
 
 class MyFilter(BaseFilter):
     foo: str