# Copyright 2016 Mirantis Inc.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import mock

from osprofiler.drivers import base
from osprofiler.tests import test


class MessagingTestCase(test.TestCase):

    @mock.patch("oslo_utils.importutils.try_import")
    def test_init_no_oslo_messaging(self, try_import_mock):
        try_import_mock.return_value = None

        self.assertRaises(
            ValueError, base.get_driver,
            "messaging://", project="project", service="service",
            host="host", context={})

    @mock.patch("oslo_utils.importutils.try_import")
    def test_init_and_notify(self, try_import_mock):
        context = "context"
        transport = "transport"
        project = "project"
        service = "service"
        host = "host"

        # emulate dynamic load of oslo.messaging library
        oslo_messaging_mock = mock.Mock()
        try_import_mock.return_value = oslo_messaging_mock

        # mock oslo.messaging APIs
        notifier_mock = mock.Mock()
        oslo_messaging_mock.Notifier.return_value = notifier_mock
        oslo_messaging_mock.get_notification_transport.return_value = transport

        notify_func = base.get_driver(
            "messaging://", project=project, service=service,
            context=context, host=host).notify

        oslo_messaging_mock.Notifier.assert_called_once_with(
            transport, publisher_id=host, driver="messaging",
            topics=["profiler"], retry=0)

        info = {
            "a": 10,
            "project": project,
            "service": service,
            "host": host
        }
        notify_func(info)

        notifier_mock.info.assert_called_once_with(
            context, "profiler.service", info)

        notifier_mock.reset_mock()
        notify_func(info, context="my_context")
        notifier_mock.info.assert_called_once_with(
            "my_context", "profiler.service", info)