replace mock with unittest.mock

tests/app/celery/test_tasks.py

@@ -3,7 +3,7 @@ from datetime import datetime
 
 import pytest
 from freezegun import freeze_time
-from mock import ANY
+from unittest.mock import ANY
 from sqlalchemy.exc import SQLAlchemyError
 from sqlalchemy.orm.exc import NoResultFound
 

tests/app/public_contracts/__init__.py

@@ -3,6 +3,7 @@ import os
 from flask import json
 import jsonschema
 
+
 def validate(json_string, schema_filename):
     schema_dir = os.path.join(os.path.dirname(__file__), 'schemas')
     resolver = jsonschema.RefResolver('file://' + schema_dir + '/', None)

tests/app/test_statsd_decorators.py

@@ -1,4 +1,4 @@
-from mock import ANY
+from unittest.mock import ANY
 
 from app.statsd_decorators import statsd
 import app

tests/conftest.py

@@ -1,7 +1,7 @@
 import os
 
 import boto3
-import mock
+from unittest import mock
 import pytest
 from alembic.command import upgrade
 from alembic.config import Config