# -*- coding: utf-8 -*-

from __future__ import unicode_literals, absolute_import

import os
from unittest import TestCase

from sqlalchemy import create_engine

from rattail.config import RattailConfig
from rattail.exceptions import ConfigurationError
from rattail.db import Session as RattailSession

from tailbone import app
from tailbone.db import Session as TailboneSession


class TestRattailConfig(TestCase):

    config_path = os.path.abspath(
        os.path.join(os.path.dirname(__file__), 'data', 'tailbone.conf'))

    def tearDown(self):
        # may or may not be necessary depending on test
        TailboneSession.remove()

    def test_settings_arg_must_include_config_path_by_default(self):
        # error raised if path not provided
        self.assertRaises(ConfigurationError, app.make_rattail_config, {})
        # get a config object if path provided
        result = app.make_rattail_config({'rattail.config': self.config_path})
        self.assertTrue(isinstance(result, RattailConfig))

    def test_settings_arg_may_override_config_and_engines(self):
        rattail_config = RattailConfig()
        engine = create_engine('sqlite://')
        result = app.make_rattail_config({
            'rattail_config': rattail_config,
            'rattail_engines': {'default': engine}})
        self.assertTrue(result is rattail_config)
        self.assertTrue(RattailSession.kw['bind'] is engine)
        self.assertTrue(TailboneSession.bind is engine)