Disable SMTP and HTTP requests during a test run.

Based mainly on https://github.com/andymckay/nose-blockage; source is available at https://github.com/rob-b/pytest-blockage

The plugin can be installed via pypi:

$ pip install pytest-blockage

To activate the plugin the --blockage parameter should be passed. e.g.:

$ py.test package --blockage

You can whitelist specific hosts:

$ py.test package --blockage --blockage-http-whitelist=some_site --blockage-smtp-whitelist=fake_smtp

All settings can be stored in your pytest file, with the same variable names as the argument names mentioned under usage:

blockage=true
blockage-http-whitelist=some_site
blockage-smtp-whitelist=fake_smtp