prefer unittest.mock from the standard library for Python >=3.8

tests/unit/http/test_async_http_client.py

@@ -1,7 +1,11 @@
 import aiounittest
 
 from aiohttp import ClientSession
-from mock import patch, AsyncMock
+try:
+    from unittest.mock import patch, AsyncMock
+except ImportError:
+    # Python 3.7
+    from mock import patch, AsyncMock
 from twilio.http.async_http_client import AsyncTwilioHttpClient
 
 

tests/unit/http/test_http_client.py

@@ -3,7 +3,11 @@
 import unittest
 from collections import OrderedDict
 
-from mock import Mock, patch
+try:
+    from unittest.mock import patch, AsyncMock
+except ImportError:
+    # Python 3.7
+    from mock import patch, AsyncMock
 from requests import Session
 
 from twilio.base.exceptions import TwilioRestException

tests/unit/http/test_validation_client.py

@@ -2,7 +2,11 @@
 
 import unittest
 
-from mock import patch, Mock
+try:
+    from unittest.mock import patch, AsyncMock
+except ImportError:
+    # Python 3.7
+    from mock import patch, AsyncMock
 from requests import Request
 from requests import Session
 

tests/unit/jwt/test_jwt.py

@@ -2,7 +2,11 @@
 import unittest
 
 import jwt as jwt_lib
-from mock import patch
+try:
+    from unittest.mock import patch, AsyncMock
+except ImportError:
+    # Python 3.7
+    from mock import patch, AsyncMock
 
 from twilio.jwt import Jwt, JwtDecodeError
 

tests/unit/rest/test_client.py

@@ -1,7 +1,11 @@
 import unittest
 import aiounittest
 
-from mock import AsyncMock, Mock
+try:
+    from unittest.mock import patch, AsyncMock
+except ImportError:
+    # Python 3.7
+    from mock import patch, AsyncMock
 from twilio.http.response import Response
 from twilio.rest import Client