chore: use mock from unittest (#1823)

* chore: use mock from unittest

* correct user_credentials_test.py

* add try except for Python 3.7

* fixes linting

* adjustments to testing suite to account for dependencies

* updates to mypy_samples.py

* linting for noxfile.py

---------

Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

Author: parthea

packages/google-cloud-bigquery/noxfile.py

@@ -72,7 +72,6 @@ def default(session, install_extras=True):
 
     # Install all test dependencies, then install local packages in-place.
     session.install(
-        "mock",
         "pytest",
         "google-cloud-testutils",
         "pytest-cov",
@@ -89,6 +88,8 @@ def default(session, install_extras=True):
         install_target = "."
     session.install("-e", install_target, "-c", constraints_path)
 
+    session.run("python", "-m", "pip", "freeze")
+
     # Run py.test against the unit tests.
     session.run(
         "py.test",
@@ -176,7 +177,7 @@ def system(session):
 
     # Install all test dependencies, then install local packages in place.
     session.install(
-        "mock", "pytest", "psutil", "google-cloud-testutils", "-c", constraints_path
+        "pytest", "psutil", "google-cloud-testutils", "-c", constraints_path
     )
     if os.environ.get("GOOGLE_API_USE_CLIENT_CERTIFICATE", "") == "true":
         # mTLS test requires pyopenssl and latest google-cloud-storage
@@ -249,7 +250,7 @@ def snippets(session):
     )
 
     # Install all test dependencies, then install local packages in place.
-    session.install("mock", "pytest", "google-cloud-testutils", "-c", constraints_path)
+    session.install("pytest", "google-cloud-testutils", "-c", constraints_path)
     session.install("google-cloud-storage", "-c", constraints_path)
     session.install("grpcio", "-c", constraints_path)
 
@@ -336,7 +337,6 @@ def prerelease_deps(session):
         "google-cloud-datacatalog",
         "google-cloud-storage",
         "google-cloud-testutils",
-        "mock",
         "psutil",
         "pytest",
         "pytest-cov",

packages/google-cloud-bigquery/samples/desktopapp/user_credentials_test.py

@@ -13,17 +13,24 @@
 # limitations under the License.
 
 import os
+import sys
 from typing import Iterator, Union
+from unittest import mock
 
 import google.auth
-import mock
 import pytest
 
 from .user_credentials import main  # type: ignore
 
 PROJECT = os.environ["GOOGLE_CLOUD_PROJECT"]
 
-MockType = Union[mock.mock.MagicMock, mock.mock.AsyncMock]
+
+if sys.version_info >= (3, 8):
+    # Python 3.8+ has an AsyncMock attribute in unittest.mock, but 3.7 does not
+    MockType = Union[mock.MagicMock, mock.AsyncMock]
+else:
+    # Other definitions and imports
+    MockType = Union[mock.MagicMock]
 
 
 @pytest.fixture

packages/google-cloud-bigquery/samples/tests/conftest.py

@@ -14,10 +14,10 @@
 
 import datetime
 from typing import Iterator, List
+from unittest import mock
 import uuid
 
 import google.auth
-import mock
 import pytest
 
 from google.cloud import bigquery

packages/google-cloud-bigquery/testing/constraints-3.7.txt

@@ -7,11 +7,16 @@
 # Then this file should have foo==1.14.0
 db-dtypes==0.3.0
 geopandas==0.9.0
-google-api-core==1.31.5
-google-cloud-bigquery-storage==2.6.0
-google-cloud-core==1.6.0
-google-resumable-media==0.6.0
+google-api-core==2.17.1
+google-auth==2.28.1
+google-cloud-bigquery-storage==2.24.0
+google-cloud-core==2.4.1
+google-cloud-testutils==1.4.0
+google-crc32c==1.5.0
+google-resumable-media==2.7.0
+googleapis-common-protos==1.62.0
 grpcio==1.47.0
+grpcio-status==1.47.0
 ipywidgets==7.7.1
 ipython==7.23.1
 ipykernel==6.0.0

packages/google-cloud-bigquery/tests/unit/conftest.py

@@ -12,7 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
+
 import pytest
 
 from .helpers import make_client

packages/google-cloud-bigquery/tests/unit/helpers.py

@@ -12,15 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from unittest import mock
+
+import pytest
+
 import google.cloud.bigquery.client
 import google.cloud.bigquery.dataset
-import mock
-import pytest
 
 
 def make_connection(*responses):
     import google.cloud.bigquery._http
-    import mock
     from google.cloud.exceptions import NotFound
 
     mock_conn = mock.create_autospec(google.cloud.bigquery._http.Connection)

packages/google-cloud-bigquery/tests/unit/job/test_base.py

@@ -15,11 +15,11 @@
 import copy
 import http
 import unittest
+from unittest import mock
 
 from google.api_core import exceptions
 import google.api_core.retry
 from google.api_core.future import polling
-import mock
 import pytest
 
 from ..helpers import make_connection

packages/google-cloud-bigquery/tests/unit/job/test_copy.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
 
 from ..helpers import make_connection
 

packages/google-cloud-bigquery/tests/unit/job/test_extract.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
 
 from ..helpers import make_connection
 

packages/google-cloud-bigquery/tests/unit/job/test_load.py

@@ -13,8 +13,7 @@
 # limitations under the License.
 
 import copy
-
-import mock
+from unittest import mock
 
 from ..helpers import make_connection