"""Test Config class"""
# Copyright © 2020  Brett Smith
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import contextlib
import os

from conservancy_beancount import config as config_mod

def _update_environ(updates):
    for key, value in updates.items():
        if value is None:
            os.environ.pop(key, None)
        else:
            os.environ[key] = str(value)

@contextlib.contextmanager
def update_environ(**kwargs):
    revert = {key: os.environ.get(key) for key in kwargs}
    _update_environ(kwargs)
    yield
    _update_environ(revert)

def test_repository_from_environment():
    with update_environ(CONSERVANCY_REPOSITORY='/usr/local'):
        config = config_mod.Config()
        assert config.repository_path().parts == ('/', 'usr', 'local')

def test_no_repository():
    with update_environ(CONSERVANCY_REPOSITORY=None):
        config = config_mod.Config()
        assert config.repository_path() is None