Using unittest.mock instead of mock

Adding types-mock to test-requirements.txt

parsl/tests/test_htex/test_resource_spec_validation.py

@@ -1,6 +1,6 @@
 import queue
+from unittest import mock
 
-import mock
 import pytest
 
 from parsl.executors import HighThroughputExecutor

parsl/tests/test_mpi_apps/test_resource_spec.py

@@ -5,18 +5,16 @@
 import typing
 import unittest
 from typing import Dict
+from unittest import mock
 
-import mock
 import pytest
 
-import parsl
 from parsl.app.app import python_app
 from parsl.executors.high_throughput.executor import HighThroughputExecutor
 from parsl.executors.high_throughput.mpi_executor import MPIExecutor
 from parsl.executors.high_throughput.mpi_prefix_composer import (
     InvalidResourceSpecification,
     MissingResourceSpecification,
-    validate_resource_spec,
 )
 from parsl.executors.high_throughput.mpi_resource_management import (
     get_nodes_in_batchjob,

test-requirements.txt

@@ -7,11 +7,13 @@ pytest-random-order
 nbsphinx
 sphinx_rtd_theme
 mypy==1.5.1
+types-mock
 types-python-dateutil
 types-requests
 types-paramiko
 mpi4py
 
+
 # sqlalchemy is needed for typechecking, so it's here
 # as well as at runtime for optional monitoring execution
 # (where it's specified in setup.py)