Example Nox file for system testing

nox_system_testing.py

import os

def session_system_gae(session):
    """Runs integration tests. As this runs a real query against BigQuery,
    the environemnt must have ``GOOGLE_APPLICATION_CREDENTIALS`` set pointing
    to ``/key.json`` where the secrets service json must be located.
    """
    session.interpreter = 'python2.7'
    session.virtualenv_dirname = 'system-gae'

    session.install('-r', 'gae/exporter/requirements.txt')
    session.install('--upgrade', 'google-cloud-bigquery')

    session.install('pytest', 'pytest-cov', 'mock')

    if not os.path.isfile:
        raise RuntimeError("File /key.json not found. Please make sure "
                           "to create this file with the service credentials "
                           "in order to run the integration tests")

    session.env = {'PYTHONPATH': ':./',
                   'GOOGLE_APPLICATION_CREDENTIALS': '/key.json'}

    session.run(
        'py.test',
        'tests/system/gae/')