Drop PyPI mock test dependency (#2190)

The functionality is in the standard library as unittest.mock
beginning with Python 3.3.

Since #2195 removed
support for everything below Python 3.6, the dependency can be removed
unconditionally.

test/unit/module/cfn_json/test_cfn_json.py

@@ -4,7 +4,7 @@
 """
 from test.testlib.testcase import BaseTestCase
 from six import StringIO
-from mock import patch
+from unittest.mock import patch
 from cfnlint.template import Template  # pylint: disable=E0401
 from cfnlint.rules import RulesCollection
 from cfnlint.core import DEFAULT_RULESDIR  # pylint: disable=E0401

test/unit/module/cfn_yaml/test_yaml.py

@@ -4,7 +4,7 @@
 """
 from test.testlib.testcase import BaseTestCase
 from six import StringIO
-from mock import patch
+from unittest.mock import patch
 from cfnlint.template import Template  # pylint: disable=E0401
 from cfnlint.rules import RulesCollection
 from cfnlint.core import DEFAULT_RULESDIR  # pylint: disable=E0401

test/unit/module/config/test_config_file_args.py

@@ -5,7 +5,7 @@
 import logging
 from test.testlib.testcase import BaseTestCase
 import jsonschema
-from mock import patch
+from unittest.mock import patch
 import cfnlint.config  # pylint: disable=E0401
 try:  # pragma: no cover
     from pathlib import Path

test/unit/module/config/test_config_mixin.py

@@ -5,7 +5,7 @@
 import logging
 import os
 from test.testlib.testcase import BaseTestCase
-from mock import patch
+from unittest.mock import patch
 import cfnlint.config  # pylint: disable=E0401
 from cfnlint.helpers import REGIONS
 

test/unit/module/core/test_run_cli.py

@@ -7,7 +7,7 @@
 from six import StringIO
 import cfnlint.core  # pylint: disable=E0401
 import cfnlint.config  # pylint: disable=E0401
-from mock import patch
+from unittest.mock import patch
 
 
 LOGGER = logging.getLogger('cfnlint')

test/unit/module/custom_rules/test_custom_rules.py

@@ -4,7 +4,7 @@
 """
 from test.testlib.testcase import BaseTestCase
 from six import StringIO
-from mock import patch
+from unittest.mock import patch
 from cfnlint.template import Template  # pylint: disable=E0401
 from cfnlint.rules import RulesCollection
 from cfnlint.core import DEFAULT_RULESDIR  # pylint: disable=E0401

test/unit/module/helpers/test_downloads_metadata.py

@@ -5,7 +5,7 @@
 import sys
 import os
 from test.testlib.testcase import BaseTestCase
-from mock import patch, MagicMock, mock_open
+from unittest.mock import patch, MagicMock, mock_open
 import cfnlint.helpers
 import json
 

test/unit/module/helpers/test_get_url_content.py

@@ -9,7 +9,7 @@
 except:
     pass
 from test.testlib.testcase import BaseTestCase
-from mock import patch, MagicMock
+from unittest.mock import patch, MagicMock
 import cfnlint.helpers
 
 
@@ -146,4 +146,4 @@ def test_url_has_newer_version_negative(self, mock_load_metadata, mocked_urlopen
         mocked_urlopen.return_value = cm
 
         result = cfnlint.helpers.url_has_newer_version(url)
-        self.assertTrue(result)
+        self.assertTrue(result)

test/unit/module/maintenance/test_update_documentation.py

@@ -5,7 +5,7 @@
 import sys
 import logging
 from test.testlib.testcase import BaseTestCase
-from mock import patch, mock_open, call
+from unittest.mock import patch, mock_open, call
 import cfnlint.maintenance
 from cfnlint.rules import CloudFormationLintRule, RulesCollection
 

test/unit/module/maintenance/test_update_iam_policies.py

@@ -5,7 +5,7 @@
 import sys
 import logging
 from test.testlib.testcase import BaseTestCase
-from mock import patch
+from unittest.mock import patch
 import cfnlint.maintenance
 
 LOGGER = logging.getLogger('cfnlint.maintenance')

test/unit/module/maintenance/test_update_resource_specs.py

@@ -6,7 +6,7 @@
 import logging
 import zipfile
 from test.testlib.testcase import BaseTestCase
-from mock import patch, MagicMock, Mock, ANY
+from unittest.mock import patch, MagicMock, Mock, ANY
 import cfnlint.maintenance
 try:
     from urllib.request import urlopen, Request

tox.ini

@@ -8,7 +8,6 @@ commands =
   coverage xml
 skip_install = True
 deps =
-  mock
   coverage
   pydot
 setenv =