@Gaurang033 please fix the test failures

@Gaurang033 please fix the test failures

could you help me understand which test is failing. I tried checking in logs but couldn't find much information.
https://source.cloud.google.com/results/invocations/570f5627-61a7-4aa7-8f1d-76eabc56918f/log

Hi @Gaurang033, thank you so much for your contribution, we really appreciate it.
I took a look at the log, and it seems coverage test is failing. Seeing from the log, line 521 in google/cloud/bigquery/_pandas_helpers.py wasn't run during unit tests. We probably need to make some changes to the unit test to ensure this line is covered. Usually, we require 100% unit test coverage for any commit to merge. If you need any help doing it, I'm more than willing to help.

nox > coverage report --show-missing --fail-under=100
Name                                                         Stmts   Miss Branch BrPart  Cover   Missing
--------------------------------------------------------------------------------------------------------
google/cloud/bigquery/_helpers.py                              291      0    152      0   100%
google/cloud/bigquery/_http.py                                  16      0      0      0   100%
google/cloud/bigquery/_job_helpers.py                           94      0     20      0   100%
google/cloud/bigquery/_pandas_helpers.py                       360      1    193      1    99%   521
google/cloud/bigquery/_pyarrow_helpers.py                       27      0      4      0   100%
google/cloud/bigquery/_tqdm_helpers.py                          55      0     20      0   100%
google/cloud/bigquery/_versions_helpers.py                      76      0     20      0   100%
google/cloud/bigquery/client.py                                855      0    318      0   100%
google/cloud/bigquery/dataset.py                               383      0     95      0   100%
google/cloud/bigquery/dbapi/__init__.py                         30      0      0      0   100%
google/cloud/bigquery/dbapi/_helpers.py                        170      0     96      0   100%
google/cloud/bigquery/dbapi/connection.py                       37      0     14      0   100%
... ...
--------------------------------------------------------------------------------------------------------
TOTAL                                                        27251      1   2797      1    99%
Coverage failure: total of 99 is less than fail-under=100
nox > Command coverage report --show-missing --fail-under=100 failed with exit code 2
nox > Session cover failed.

Just to make it more efficient for you in the future, you can see a rundown of all test results if you scroll down to the bottom of the logs (kokoro test especially):

Hi @Gaurang033, thank you so much for your contribution, we really appreciate it. I took a look at the log, and it seems coverage test is failing. Seeing from the log, line 521 in google/cloud/bigquery/_pandas_helpers.py wasn't run during unit tests. We probably need to make some changes to the unit test to ensure this line is covered. Usually, we require 100% unit test coverage for any commit to merge. If you need any help doing it, I'm more than willing to help.

nox > coverage report --show-missing --fail-under=100
Name                                                         Stmts   Miss Branch BrPart  Cover   Missing
--------------------------------------------------------------------------------------------------------
google/cloud/bigquery/_helpers.py                              291      0    152      0   100%
google/cloud/bigquery/_http.py                                  16      0      0      0   100%
google/cloud/bigquery/_job_helpers.py                           94      0     20      0   100%
google/cloud/bigquery/_pandas_helpers.py                       360      1    193      1    99%   521
google/cloud/bigquery/_pyarrow_helpers.py                       27      0      4      0   100%
google/cloud/bigquery/_tqdm_helpers.py                          55      0     20      0   100%
google/cloud/bigquery/_versions_helpers.py                      76      0     20      0   100%
google/cloud/bigquery/client.py                                855      0    318      0   100%
google/cloud/bigquery/dataset.py                               383      0     95      0   100%
google/cloud/bigquery/dbapi/__init__.py                         30      0      0      0   100%
google/cloud/bigquery/dbapi/_helpers.py                        170      0     96      0   100%
google/cloud/bigquery/dbapi/connection.py                       37      0     14      0   100%
... ...
--------------------------------------------------------------------------------------------------------
TOTAL                                                        27251      1   2797      1    99%
Coverage failure: total of 99 is less than fail-under=100
nox > Command coverage report --show-missing --fail-under=100 failed with exit code 2
nox > Session cover failed.

Just to make it more efficient for you in the future, you can see a rundown of all test results if you scroll down to the bottom of the logs (kokoro test especially):

I am running coverge using following, however my result is different then I see in logs.
nox -R -s unit-3.8 nox -s cover

Thank you @Gaurang033 for fixing the coverage test :)
LGTM