Patch boto3 to avoid credentials errors and real API calls during unit tests.

conftest.py

  
'''
Unit test setup automatically called
'''
from unittest import mock
import pytest

# Fixture, autouse
@pytest.fixture(scope='session', autouse=True)
def patch_boto3(request):
    '''patch things for every unit test'''
    # Patch boto client to return a magic mock by default during
    # Avoids ever making real calls in tests or getting botocore
    # credentials errors in tests
    patched = mock.patch('botocore.client.BaseClient._make_api_call')
    # Start the patch
    patched.start()
    def unpatch():
        '''try to unpatch if the patch is still active'''
        try:
            patched.stop()
        except IndexError:
            pass
    # When the test is over, run this method
    request.addfinalizer(unpatch)

elite.