How to past INI configuration file for your py.test based Pyramid unit tests

conftest.py

import os
import pyramid.testing
import pytest
import transaction

from sqlalchemy.orm.session import Session

from pyramid.paster import (
    get_appsettings,
    setup_logging,
    bootstrap)

# TODO: Remove this method
from websauna.system import get_init

from websauna.system.model import Base


@pytest.fixture(scope='session')
def ini_settings(request):
    """Load INI settings from py.test command line.

    Example: 
    
         py.test yourpackage -s --ini=test.ini 

    """

    if not getattr(request.config.option, "ini", None):
        raise RuntimeError("You need to give --ini test.ini command line option to py.test to find our test settings")

    config_uri = os.path.abspath(request.config.option.ini)
    setup_logging(config_uri)
    config = get_appsettings(config_uri)

    # To pass forward in fixtures
    config["_ini_file"] = config_uri

    return config


@pytest.fixture(scope='session')
def app(request, ini_settings):
    """Initialize WSGI application from INI file given on the command line.

    :return: WSGI application instance as created by ``Initializer.make_wsgi_app()``.
    """
    if not getattr(request.config.option, "ini", None):
        raise RuntimeError("You need to give --ini test.ini command line option to py.test to find our test settings")

    data = bootstrap(ini_settings["_ini_file"])
    return data["app"]
    
def pytest_addoption(parser):
    parser.addoption("--ini", action="store", metavar="INI_FILE", help="use INI_FILE to configure SQLAlchemy")