"""Unit tests for settings.py."""

from third_party_auth import provider, settings
from third_party_auth.tests import testutil
import unittest


_ORIGINAL_AUTHENTICATION_BACKENDS = ('first_authentication_backend',)
_ORIGINAL_INSTALLED_APPS = ('first_installed_app',)
_ORIGINAL_MIDDLEWARE_CLASSES = ('first_middleware_class',)
_ORIGINAL_TEMPLATE_CONTEXT_PROCESSORS = ('first_template_context_preprocessor',)
_SETTINGS_MAP = {
    'AUTHENTICATION_BACKENDS': _ORIGINAL_AUTHENTICATION_BACKENDS,
    'INSTALLED_APPS': _ORIGINAL_INSTALLED_APPS,
    'MIDDLEWARE_CLASSES': _ORIGINAL_MIDDLEWARE_CLASSES,
    'TEMPLATE_CONTEXT_PROCESSORS': _ORIGINAL_TEMPLATE_CONTEXT_PROCESSORS,
    'FEATURES': {},
}


class SettingsUnitTest(testutil.TestCase):
    """Unit tests for settings management code."""

    # Allow access to protected methods (or module-protected methods) under
    # test. pylint: disable-msg=protected-access
    # Suppress sprurious no-member warning on fakes.
    # pylint: disable-msg=no-member

    def setUp(self):
        super(SettingsUnitTest, self).setUp()
        self.settings = testutil.FakeDjangoSettings(_SETTINGS_MAP)

    def test_apply_settings_adds_exception_middleware(self):
        settings.apply_settings(self.settings)
        for middleware_name in settings._MIDDLEWARE_CLASSES:
            self.assertIn(middleware_name, self.settings.MIDDLEWARE_CLASSES)

    def test_apply_settings_adds_fields_stored_in_session(self):
        settings.apply_settings(self.settings)
        self.assertEqual(settings._FIELDS_STORED_IN_SESSION, self.settings.FIELDS_STORED_IN_SESSION)

    def test_apply_settings_adds_third_party_auth_to_installed_apps(self):
        settings.apply_settings(self.settings)
        self.assertIn('third_party_auth', self.settings.INSTALLED_APPS)

    @unittest.skipUnless(testutil.AUTH_FEATURE_ENABLED, 'third_party_auth not enabled')
    def test_apply_settings_enables_no_providers_by_default(self):
        # Providers are only enabled via ConfigurationModels in the database
        settings.apply_settings(self.settings)
        self.assertEqual([], provider.Registry.enabled())

    def test_apply_settings_turns_off_raising_social_exceptions(self):
        # Guard against submitting a conf change that's convenient in dev but
        # bad in prod.
        settings.apply_settings(self.settings)
        self.assertFalse(self.settings.SOCIAL_AUTH_RAISE_EXCEPTIONS)
