packages/antlion/unit_tests/controllers/android_lib/services_test.py

#!/usr/bin/env python3
#
# Copyright 2022 The Fuchsia Authors
#
# 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 unittest
from unittest import mock

from antlion.controllers.android_lib import services
from antlion.controllers.android_lib.events import (
    AndroidStartServicesEvent,
    AndroidStopServicesEvent,
)
from antlion.event import event_bus


class ServicesTest(unittest.TestCase):
    """Tests antlion.controllers.android_lib.services"""

    # AndroidService

    def test_register_adds_both_start_and_stop_methods(self):
        """Test that both the _start and _stop methods are registered to
        their respective events upon calling register().
        """
        event_bus._event_bus = event_bus._EventBus()
        service = services.AndroidService(mock.Mock())
        service.register()
        subscriptions = event_bus._event_bus._subscriptions
        self.assertTrue(
            any(
                subscription._func == service._start
                for subscription in subscriptions[AndroidStartServicesEvent]
            )
        )
        self.assertTrue(
            any(
                subscription._func == service._stop
                for subscription in subscriptions[AndroidStopServicesEvent]
            )
        )

    @unittest.mock.patch.object(services.AndroidService, "_start")
    def test_event_deliver_only_to_matching_serial(self, start_fn):
        """Test that the service only responds to events that matches its
        device serial.
        """
        event_bus._event_bus = event_bus._EventBus()
        service = services.AndroidService(mock.Mock())
        service.ad.serial = "right_serial"
        service.register()

        wrong_ad = mock.Mock()
        wrong_ad.serial = "wrong_serial"
        wrong_event = AndroidStartServicesEvent(wrong_ad)
        event_bus.post(wrong_event)
        start_fn.assert_not_called()

        right_ad = mock.Mock()
        right_ad.serial = "right_serial"
        right_event = AndroidStartServicesEvent(right_ad)
        event_bus.post(right_event)
        start_fn.assert_called_with(right_event)

    def test_unregister_removes_both_start_and_stop_methods(self):
        """Test that both the _start and _stop methods are unregistered from
        their respective events upon calling unregister().
        """
        event_bus._event_bus = event_bus._EventBus()
        service = services.AndroidService(mock.Mock())
        service.register()
        service.unregister()
        subscriptions = event_bus._event_bus._subscriptions
        self.assertFalse(
            any(
                subscription._func == service._start
                for subscription in subscriptions[AndroidStartServicesEvent]
            )
        )
        self.assertFalse(
            any(
                subscription._func == service._stop
                for subscription in subscriptions[AndroidStopServicesEvent]
            )
        )


if __name__ == "__main__":
    unittest.main()