Use unittest.mock instead of mock (#1673)

This module has been included in Python itself since 3.3.

Fixes: https://github.com/rq/rq/issues/1646

dev-requirements.txt

@@ -1,5 +1,4 @@
 codecov
-mock
 psutil
 pytest
 pytest-cov

tests/test_decorator.py

@@ -2,7 +2,7 @@
 from __future__ import (absolute_import, division, print_function,
                         unicode_literals)
 
-import mock
+from unittest import mock
 from redis import Redis
 
 from rq.decorators import job

tests/test_queue.py

@@ -5,7 +5,7 @@ from __future__ import (absolute_import, division, print_function,
 import json
 from datetime import datetime, timedelta, timezone
 from rq.serializers import DefaultSerializer, JSONSerializer
-from mock.mock import patch
+from unittest.mock import patch
 
 from rq import Retry, Queue
 from rq.job import Job, JobStatus

tests/test_scheduler.py

@@ -2,7 +2,7 @@ import os
 from datetime import datetime, timedelta, timezone
 from multiprocessing import Process
 
-import mock
+from unittest import mock
 from rq import Queue
 from rq.compat import PY2
 from rq.exceptions import NoSuchJobError

tests/test_sentry.py

@@ -11,7 +11,7 @@ from rq.worker import SimpleWorker
 from tests import RQTestCase
 from tests.fixtures import div_by_zero
 
-import mock
+from unittest import mock
 from click.testing import CliRunner
 
 

tests/test_utils.py

@@ -3,7 +3,7 @@ from __future__ import (absolute_import, division, print_function,
                         unicode_literals)
 import re
 import datetime
-import mock
+from unittest import mock
 
 from redis import Redis
 

tests/test_worker.py

@@ -20,8 +20,8 @@ from unittest import skipIf
 
 import redis.exceptions
 import pytest
-import mock
-from mock import Mock
+from unittest import mock
+from unittest.mock import Mock
 
 from tests import RQTestCase, slow
 from tests.fixtures import (

tests/test_worker_registration.py

@@ -1,6 +1,6 @@
 from rq.utils import ceildiv
 from tests import RQTestCase
-from mock.mock import patch
+from unittest.mock import patch
 
 from rq import Queue, Worker
 from rq.worker_registration import (clean_worker_registry, get_keys, register,

tox.ini

@@ -6,7 +6,6 @@ commands=pytest --cov rq --durations=5 {posargs}
 deps=
     pytest
     pytest-cov
-    mock
 
 [testenv:flake8]
 basepython = python3.6