tests.unit.test_core.test_controller

Complexity

Total Complexity

89

Size/Duplication

Total Lines	1078
Duplicated Lines	0 %

Test Coverage

Coverage

99.06%

Importance

Changes

0

76 Methods

Rating	Name	Duplication	Size	Complexity
A	TestController.test_stop()	0	9	1
A	TestController.test_debug_on_defaults()	0	5	1
A	TestController.test_start_error_broad_exception()	0	20	1
A	TestController.test_reload_napp__error()	0	10	1
A	TestController.test_add_new_switch()	0	10	1
A	TestController.test_create_pidfile()	0	15	2
A	TestController.test_notify_listeners()	0	10	1
A	TestControllerAsync.test_raw_event_handler()	0	8	1
A	TestController.test_get_switch_or_create__exists()	0	14	1
A	TestController.test_rest_reload_napp()	0	14	1
A	TestController._add_napp()	0	9	1
A	TestController.test_try_to_fmt_traceback_msg()	0	7	1
A	TestController._test_debug_result()	0	10	3
A	TestController.test_remove_switch()	0	9	1
A	TestController.test_init_attrs()	0	5	1
A	TestController.test_load_napp__file_not_found()	0	9	1
A	TestController.test_remove_switch__error()	0	11	1
A	TestController.test_get_links_from_interfaces()	0	16	1
A	TestController.test_remove_connection()	0	9	1
A	TestController.test_get_connection_by_id()	0	9	1
A	TestController.test_load_napp__module_not_found()	0	9	1
A	TestController.test_unload_napps()	0	17	2
A	TestController.test_pre_install_napps()	0	11	1
A	TestControllerAsync.test_app_event_handler()	0	8	1
A	TestController.test_get_interface_by_id()	0	11	1
A	TestController.test_debug_no_name()	0	8	1
A	TestController.test_reload_napp_module__module_not_found()	0	7	2
A	TestController.test_get_switch_by_dpid()	0	9	1
A	TestController.test_config_default_maxsize_multiplier()	0	8	2
B	TestController.test_get_link_or_create()	0	45	1
A	TestController.test_deprecation_warning()	0	9	3
A	TestController.test_debug_off()	0	9	2
A	TestControllerAsync.test_configuration_endpoint()	0	7	1
A	TestController.test_reload_napp()	0	15	1
A	TestController.test_restart()	0	14	1
A	TestController.test_import_napp()	0	18	1
A	TestControllerAsync.test_msg_out_event_handler()	0	20	1
A	TestController.test_get_link()	0	12	1
A	TestController.test_rest_reload_all_napps()	0	15	1
A	TestController.test_start_with_mongodb_and_apm()	0	20	1
A	TestController.setup_method()	0	13	1
A	TestController.test_create_or_update_connection()	0	9	1
A	TestControllerAsync.test_msg_out_event_handler_pack_exc()	0	14	1
A	TestController.test_load_napps()	0	12	1
A	TestController.test_get_interface_by_id__not_switch()	0	11	1
A	TestControllerAsync.test_stop_controller()	0	22	1
A	TestController.test_load_napp()	0	17	1
A	TestController.test_status()	0	8	1
A	TestController.test_websocket_log_usage()	0	20	1
A	TestController.test_link_status_mismatched()	0	10	1
A	TestController.test_get_switch_or_create__not_exists()	0	14	1
A	TestControllerAsync.test_app_event_handler_exc()	0	12	1
A	TestController.test_load_napp__loaded()	0	8	1
A	TestController.test_loggers()	0	7	2
A	TestController.test_start()	0	18	1
A	TestController.test_unload_napp_other_listener()	0	9	1
A	TestController.test_debug_wrong_name()	0	4	1
A	TestController.test_start_with_invalid_database_backend()	0	10	1
A	TestController.test_debug_empty_name()	0	8	1
A	TestController.test_unload_napp_listener()	0	9	1
A	TestControllerAsync.test_msg_out_event_handler_broad_exc()	0	14	1
A	TestController.test_new_connection()	0	11	1
A	TestController.test_get_interface_by_id__not_interface()	0	5	1
A	TestControllerAsync.test_publish_connection_error()	0	5	1
A	TestControllerAsync.test_full_queue_counter()	0	14	2
A	TestController.test_get_link_or_create_old_mismatched_link()	0	41	1
A	TestController.test_debug_on()	0	5	1
A	TestControllerAsync.test_start_controller()	0	29	1
A	TestController.test_reload_napp_module()	0	12	1
A	TestController.test_load_napp__error()	0	16	2
A	TestControllerAsync.test_msg_in_event_handler()	0	9	1
A	TestController.test_get_link_or_create_mismatched()	0	41	1
A	TestController.test_metadata_endpoint()	0	9	1
A	TestController.test_reload_napp_module__import_error()	0	11	2
A	TestController.test_uptime()	0	11	1
A	TestController.test_detect_mismatched_link()	0	17	1

"""Test kytos.core.controller module."""
import json
import logging
import sys
import tempfile
import warnings
from collections import Counter
from copy import copy
from unittest.mock import AsyncMock, MagicMock, Mock, call, patch

import pytest
from janus import Queue
from pyof.foundation.exceptions import PackException

from kytos.core import Controller
from kytos.core.auth import Auth
from kytos.core.buffers import KytosBuffers, KytosEventBuffer
from kytos.core.common import EntityStatus
from kytos.core.config import KytosConfig
from kytos.core.events import KytosEvent
from kytos.core.exceptions import KytosNAppSetupException
from kytos.core.logs import LogManager
from kytos.core.rest_api import Request
from kytos.lib.helpers import (get_interface_mock, get_link_mock,
                               get_switch_mock)


# pylint: disable=protected-access, too-many-public-methods, too-many-lines
class TestController:
    """Controller tests."""

    def setup_method(self):
        """Instantiate a controller."""

        self.options = KytosConfig().options['daemon']
        self.napps_manager = Mock()
        Auth.get_user_controller = MagicMock()
        self.controller = Controller(self.options)
        self.controller._buffers = MagicMock()
        self.controller.napps_manager = self.napps_manager
        self.controller.log = Mock()
        self.controller.log.getEffectiveLevel.return_value = 20
        self.app = self.controller.api_server.app
        self.base_url = "http://127.0.0.1/api/kytos/core/"

    @staticmethod
    @patch('kytos.core.controller.LogManager')
    @patch('kytos.core.logs.Path')
    @pytest.mark.skip(reason="TODO issue 371 in a future PR")
    def test_websocket_log_usage(path, log_manager):
        """Assert that the web socket log is used."""
        # Save original state
        handlers_bak = copy(logging.root.handlers)

        # Minimum to instantiate Controller
        options = Mock(napps='', logger_decorators=[])
        path.return_value.exists.return_value = False
        controller = Controller(options)

        # The test
        controller.enable_logs()
        log_manager.enable_websocket.assert_called_once()

        # Restore original state
        logging.root.handlers = handlers_bak

    @patch('kytos.core.api_server.APIServer.remove_napp_endpoints')
    def test_unload_napp_listener(self, _):
        """Call NApp shutdown listener on unload."""
        username, napp_name = 'test', 'napp'
        listener = self._add_napp(username, napp_name)

        listener.assert_not_called()
        self.controller.unload_napp(username, napp_name)
        listener.assert_called()

    @patch('kytos.core.api_server.APIServer.remove_napp_endpoints')
    def test_unload_napp_other_listener(self, _):
        """Should not call other NApps' shutdown listener on unload."""
        username, napp_name = 'test', 'napp1'
        self._add_napp(username, napp_name)
        other_listener = self._add_napp('test', 'napp2')

        self.controller.unload_napp(username, napp_name)
        other_listener.assert_not_called()

    def _add_napp(self, username, napp_name):
        """Add a mocked NApp to the controller."""
        napp_id = f'{username}/{napp_name}'
        event_name = f'kytos/core.shutdown.{napp_id}'
        listener = Mock()
        self.controller.events_listeners[event_name] = [listener]
        napp = Mock(_listeners={})
        self.controller.napps[(username, napp_name)] = napp
        return listener

    def test_deprecation_warning(self):
        """Deprecated method should suggest @rest decorator."""
        with warnings.catch_warnings(record=True) as wrngs:
            warnings.simplefilter("always")  # trigger all warnings
            self.controller.register_rest_endpoint('x', lambda x: x, ['GET'])
            assert 1 == len(wrngs)
            warning = wrngs[0]
            assert warning.category == DeprecationWarning
            assert '@rest' in str(warning.message)

    def test_loggers(self):
        """Test that all controller loggers are under kytos
        hierarchy logger.
        """
        loggers = self.controller.loggers()
        for logger in loggers:
            assert logger.name.startswith("kytos")

    def test_debug_on(self):
        """Test the enable debug feature."""
        # Enable debug for kytos.core
        self.controller.toggle_debug("kytos.core")
        self._test_debug_result()

    def test_debug_on_defaults(self):
        """Test the enable debug feature. Test the default parameter"""
        # Enable debug for kytos.core
        self.controller.toggle_debug("kytos.core")
        self._test_debug_result()

    def _test_debug_result(self):
        """Verify if the loggers have level debug."""
        loggers = self.controller.loggers()
        for logger in loggers:
            # Check if all kytos.core loggers are in DEBUG mode.
            # All the rest must remain the same.
            if logger.name.startswith("kytos.core"):
                assert logger.getEffectiveLevel(), logging.DEBUG
            else:
                assert logger.getEffectiveLevel(), logging.CRITICAL

    def test_debug_off(self):
        """Test the disable debug feature"""
        # Fist we enable the debug
        self.controller.toggle_debug("kytos.core")
        # ... then we disable the debug for the test
        self.controller.toggle_debug("kytos.core")
        loggers = self.controller.loggers()
        for logger in loggers:
            assert logger.getEffectiveLevel(), logging.CRITICAL

    @patch.object(LogManager, 'load_config_file')
    def test_debug_no_name(self, mock_load_config_file):
        """Test the enable debug logger with default levels."""
        # Mock the LogManager that loads the default Loggers
        self.controller.toggle_debug()
        self._test_debug_result()

        mock_load_config_file.assert_called_once()

    @patch.object(LogManager, 'load_config_file')
    def test_debug_empty_name(self, mock_load_config_file):
        """Test the enable debug logger with default levels."""
        # Mock the LogManager that loads the default Loggers
        self.controller.toggle_debug('')
        self._test_debug_result()

        mock_load_config_file.assert_called_once()

    def test_debug_wrong_name(self):
        """Test the enable debug logger with wrong name."""
        pytest.raises(ValueError,
                      self.controller.toggle_debug, name="foobar")

    @patch('kytos.core.controller.init_apm')
    @patch('kytos.core.controller.db_conn_wait')
    @patch('kytos.core.controller.Controller.start_controller')
    @patch('kytos.core.controller.Controller.create_pidfile')
    @patch('kytos.core.controller.Controller.enable_logs')
    async def test_start(self, *args):
        """Test start method."""
        (mock_enable_logs, mock_create_pidfile,
         mock_start_controller, mock_db_conn_wait,
         mock_init_apm) = args
        await self.controller.start()

        mock_enable_logs.assert_called()
        mock_create_pidfile.assert_called()
        mock_start_controller.assert_called()
        mock_db_conn_wait.assert_not_called()
        mock_init_apm.assert_not_called()
        assert self.controller.apm is None

    @patch('kytos.core.controller.sys')
    @patch('kytos.core.controller.init_apm')
    @patch('kytos.core.controller.db_conn_wait')
    @patch('kytos.core.controller.Controller.start_controller')
    @patch('kytos.core.controller.Controller.create_pidfile')
    @patch('kytos.core.controller.Controller.enable_logs')
    async def test_start_error_broad_exception(self, *args):
        """Test start error handling broad exception."""
        (mock_enable_logs, mock_create_pidfile,
         mock_start_controller, mock_db_conn_wait,
         mock_init_apm, mock_sys) = args
        mock_start_controller.side_effect = Exception
        await self.controller.start()

        mock_enable_logs.assert_called()
        mock_create_pidfile.assert_called()
        mock_start_controller.assert_called()
        mock_db_conn_wait.assert_not_called()
        mock_init_apm.assert_not_called()
        mock_sys.exit.assert_called()

    @patch('kytos.core.controller.init_apm')
    @patch('kytos.core.controller.db_conn_wait')
    @patch('kytos.core.controller.Controller.start_controller')
    @patch('kytos.core.controller.Controller.create_pidfile')
    @patch('kytos.core.controller.Controller.enable_logs')
    async def test_start_with_mongodb_and_apm(self, *args):
        """Test start method with database and APM options set."""
        (mock_enable_logs, mock_create_pidfile,
         mock_start_controller, mock_db_conn_wait,
         mock_init_apm) = args
        self.controller.options.database = "mongodb"
        self.controller.options.apm = "es"
        await self.controller.start()

        mock_enable_logs.assert_called()
        mock_create_pidfile.assert_called()
        mock_start_controller.assert_called()
        mock_db_conn_wait.assert_called()
        mock_init_apm.assert_called()
        assert self.controller.apm is not None

    @patch('kytos.core.controller.sys.exit')
    @patch('kytos.core.controller.Controller.create_pidfile')
    @patch('kytos.core.controller.Controller.enable_logs')
    async def test_start_with_invalid_database_backend(self, *args):
        """Test start method with unsupported database backend."""
        (mock_enable_logs, _, mock_sys_exit) = args
        self.controller.options.database = "invalid"
        await self.controller.start()
        mock_enable_logs.assert_called()
        mock_sys_exit.assert_called()

    @patch('os.getpid')
    @patch('kytos.core.controller.atexit')
    def test_create_pidfile(self, *args):
        """Test activate method."""
        (_, mock_getpid) = args
        mock_getpid.return_value = 2
        with tempfile.NamedTemporaryFile() as tmp_file:
            tmp_file.write(b'4194305')  # pid_max +1
            tmp_file.seek(0)
            self.controller.options.pidfile = tmp_file.name

            self.controller.create_pidfile()

            pid = tmp_file.read()
            assert pid == b'2'

    @patch('kytos.core.controller.Controller.__init__')
    @patch('kytos.core.controller.Controller.start')
    @patch('kytos.core.controller.Controller.stop')
    def test_restart(self, *args):
        """Test restart method."""
        (mock_stop, mock_start, mock_init) = args
        self.controller.started_at = 1

        graceful = True
        self.controller.restart(graceful)

        mock_stop.assert_called_with(graceful)
        mock_init.assert_called_with(self.controller.options)
        mock_start.assert_called_with(restart=True)

    @patch('kytos.core.controller.Controller.stop_controller')
    def test_stop(self, mock_stop_controller):
        """Test stop method."""
        self.controller.started_at = 1

        graceful = True
        self.controller.stop(graceful)

        mock_stop_controller.assert_called_with(graceful)

    def test_status(self):
        """Test status method."""
        status_1 = self.controller.status()
        self.controller.started_at = 1
        status_2 = self.controller.status()

        assert status_1 == 'Stopped'
        assert status_2 == 'Running since 1'

    @patch('kytos.core.controller.now')
    def test_uptime(self, mock_now):
        """Test uptime method."""
        mock_now.return_value = 11

        uptime_1 = self.controller.uptime()
        self.controller.started_at = 1
        uptime_2 = self.controller.uptime()

        assert uptime_1 == 0
        assert uptime_2 == 10

    def test_metadata_endpoint(self):
        """Test metadata_endpoint method."""
        req = Request(scope={"type": "http"})
        resp = self.controller.metadata_endpoint(req)
        json_metadata = json.loads(resp.body.decode())

        expected_keys = ['__version__', '__author__', '__license__', '__url__',
                         '__description__']
        assert list(json_metadata.keys()) == expected_keys

    def test_notify_listeners(self):
        """Test notify_listeners method."""
        method = MagicMock()
        self.controller.events_listeners = {'kytos/any': [method]}

        event = MagicMock()
        event.name = 'kytos/any'
        self.controller.notify_listeners(event)

        method.assert_called_with(event)

    def test_get_interface_by_id__not_interface(self):
        """Test get_interface_by_id method when interface does not exist."""
        resp_interface = self.controller.get_interface_by_id(None)

        assert resp_interface is None

    def test_get_interface_by_id__not_switch(self):
        """Test get_interface_by_id method when switch does not exist."""
        interface = MagicMock()
        switch = MagicMock()
        switch.interfaces = {123: interface}
        self.controller.switches = {'00:00:00:00:00:00:00:02': switch}

        interface_id = '00:00:00:00:00:00:00:01:123'
        resp_interface = self.controller.get_interface_by_id(interface_id)

        assert resp_interface is None

    def test_get_interface_by_id(self):
        """Test get_interface_by_id method."""
        interface = MagicMock()
        switch = MagicMock()
        switch.interfaces = {123: interface}
        self.controller.switches = {'00:00:00:00:00:00:00:01': switch}

        interface_id = '00:00:00:00:00:00:00:01:123'
        resp_interface = self.controller.get_interface_by_id(interface_id)

        assert resp_interface == interface

    def test_get_switch_by_dpid(self):
        """Test get_switch_by_dpid method."""
        dpid = '00:00:00:00:00:00:00:01'
        switch = MagicMock(dpid=dpid)
        self.controller.switches = {dpid: switch}

        resp_switch = self.controller.get_switch_by_dpid(dpid)

        assert resp_switch == switch

    def test_get_switch_or_create__exists(self):
        """Test status_api method when switch exists."""
        dpid = '00:00:00:00:00:00:00:01'
        switch = MagicMock(dpid=dpid)
        self.controller.switches = {dpid: switch}
        self.controller.buffers.conn = MagicMock()

        connection = MagicMock()
        resp_switch = self.controller.get_switch_or_create(dpid, connection)

        assert resp_switch == switch
        self.controller.buffers.conn.put.assert_called()
        ev_name = "kytos/core.switch.reconnected"
        assert self.controller.buffers.conn.put.call_args[0][0].name == ev_name

    def test_get_switch_or_create__not_exists(self):
        """Test status_api method when switch does not exist."""
        self.controller.switches = {}
        self.controller.buffers.conn = MagicMock()

        dpid = '00:00:00:00:00:00:00:01'
        connection = MagicMock()
        switch = self.controller.get_switch_or_create(dpid, connection)

        expected_switches = {'00:00:00:00:00:00:00:01': switch}
        assert self.controller.switches == expected_switches
        self.controller.buffers.conn.put.assert_called()
        ev_name = "kytos/core.switch.new"
        assert self.controller.buffers.conn.put.call_args[0][0].name == ev_name

    def test_create_or_update_connection(self):
        """Test create_or_update_connection method."""
        self.controller.connections = {}

        connection = MagicMock()
        connection.id = '123'
        self.controller.create_or_update_connection(connection)

        assert self.controller.connections == {'123': connection}

    def test_get_connection_by_id(self):
        """Test get_connection_by_id method."""
        connection = MagicMock()
        connection.id = '123'
        self.controller.connections = {connection.id: connection}

        resp_connection = self.controller.get_connection_by_id('123')

        assert resp_connection == connection

    def test_remove_connection(self):
        """Test remove_connection method."""
        connection = MagicMock()
        connection.id = '123'
        self.controller.connections = {connection.id: connection}

        self.controller.remove_connection(connection)

        assert not self.controller.connections

    def test_remove_switch(self):
        """Test remove_switch method."""
        switch = MagicMock()
        switch.dpid = '00:00:00:00:00:00:00:01'
        self.controller.switches = {switch.dpid: switch}

        self.controller.remove_switch(switch)

        assert not self.controller.switches

    def test_remove_switch__error(self):
        """Test remove_switch method to error case."""
        switch_1 = MagicMock()
        switch_2 = MagicMock()
        switch_1.dpid = '00:00:00:00:00:00:00:01'
        switch_2.dpid = '00:00:00:00:00:00:00:02'
        self.controller.switches = {switch_1.dpid: switch_1}

        self.controller.remove_switch(switch_2)

        assert self.controller.switches == {switch_1.dpid: switch_1}

    def test_new_connection(self):
        """Test new_connection method."""
        self.controller.connections = {}

        connection = MagicMock()
        connection.id = '123'
        event = MagicMock()
        event.source = connection
        self.controller.new_connection(event)

        assert self.controller.connections == {'123': connection}

    def test_add_new_switch(self):
        """Test add_new_switch method."""
        self.controller.switches = {}

        switch = MagicMock()
        switch.dpid = '00:00:00:00:00:00:00:01'
        self.controller.add_new_switch(switch)

        expected_switches = {'00:00:00:00:00:00:00:01': switch}
        assert self.controller.switches == expected_switches

    @patch('kytos.core.controller.module_from_spec')
    @patch('kytos.core.controller.spec_from_file_location')
    def test_import_napp(self, *args):
        """Test _import_napp method."""
        (mock_spec_from_file, mock_module_from_spec) = args
        napp_spec = MagicMock()
        napp_spec.name = 'spec_name'
        mock_spec_from_file.return_value = napp_spec
        napp_module = MagicMock()
        mock_module_from_spec.return_value = napp_module

        self.controller.options.napps = 'napps'
        self.controller._import_napp('kytos', 'napp')

        assert sys.modules[napp_spec.name] == napp_module
        mock_spec_from_file.assert_called_with('napps.kytos.napp.main',
                                               'napps/kytos/napp/main.py')
        napp_spec.loader.exec_module.assert_called_with(napp_module)

    def test_load_napp__loaded(self):
        """Test load_napp method when napp is already loaded."""
        napp = MagicMock()
        self.controller.napps = {('kytos', 'napp'): napp}

        self.controller.load_napp('kytos', 'napp')

        assert self.controller.napps == {('kytos', 'napp'): napp}

    @patch('kytos.core.controller.Controller._import_napp')
    def test_load_napp__module_not_found(self, mock_import_napp):
        """Test load_napp method when module is not found."""
        mock_import_napp.side_effect = ModuleNotFoundError

The variable ModuleNotFoundError does not seem to be defined.

        self.controller.napps = {}

        self.controller.load_napp('kytos', 'napp')

        assert not self.controller.napps

    @patch('kytos.core.controller.Controller._import_napp')
    def test_load_napp__file_not_found(self, mock_import_napp):
        """Test load_napp method when file is not found."""
        mock_import_napp.side_effect = FileNotFoundError
        self.controller.napps = {}

        self.controller.load_napp('kytos', 'napp')

        assert not self.controller.napps

    @patch('kytos.core.api_server.APIServer.register_napp_endpoints')
    @patch('kytos.core.controller.Controller._import_napp')
    def test_load_napp__error(self, *args):
        """Test load_napp method when an error is raised on napp module
           attribution."""
        (mock_import_napp, _) = args
        self.controller.napps = {}

        module = MagicMock()
        module.Main.side_effect = Exception
        mock_import_napp.return_value = module

        with pytest.raises(KytosNAppSetupException):
            self.controller.load_napp('kytos', 'napp')

        assert not self.controller.napps

    @patch('kytos.core.api_server.APIServer.register_napp_endpoints')
    @patch('kytos.core.controller.Controller._import_napp')
    def test_load_napp(self, *args):
        """Test load_napp method."""
        (mock_import_napp, mock_register) = args
        self.controller.napps = {}

        napp = MagicMock()
        module = MagicMock()
        module.Main.return_value = napp
        mock_import_napp.return_value = module

        self.controller.load_napp('kytos', 'napp')

        assert self.controller.napps == {('kytos', 'napp'): napp}
        napp.start.assert_called()
        mock_register.assert_called_with(napp)

    def test_pre_install_napps(self):
        """Test pre_install_napps method."""
        napp_1 = MagicMock()
        napp_2 = MagicMock()
        installed_napps = [napp_1]
        napps = [str(napp_1), str(napp_2)]
        self.napps_manager.get_installed_napps.return_value = installed_napps

        self.controller.pre_install_napps(napps)

        self.napps_manager.install.assert_called_with(str(napp_2), enable=True)

    @patch('kytos.core.controller.Controller.load_napp')
    def test_load_napps(self, mock_load):
        """Test load_napps method."""
        napp = MagicMock()
        napp.username = 'kytos'
        napp.name = 'name'
        enabled_napps = [napp]
        self.napps_manager.get_enabled_napps.return_value = enabled_napps

        self.controller.load_napps()

        mock_load.assert_called_with('kytos', 'name')

    @patch('kytos.core.controller.Controller.unload_napp')
    def test_unload_napps(self, mock_unload):
        """Test un_load_napps method."""
        napp_tuples = [("kytos", "of_core"), ("kytos", "mef_eline")]
        enabled_napps = []
        expected_calls = []
        for username, napp_name in napp_tuples:
            mock = MagicMock()
            mock.username = username
            mock.name = napp_name
            enabled_napps.append(mock)
            expected_calls.append(call(mock.username, mock.name))
        self.napps_manager.get_enabled_napps.return_value = enabled_napps

        self.controller.unload_napps()
        assert mock_unload.call_count == len(enabled_napps)
        assert mock_unload.mock_calls == list(reversed(expected_calls))

    @patch('kytos.core.controller.import_module')
    def test_reload_napp_module__module_not_found(self, mock_import_module):
        """Test reload_napp_module method when module is not found."""
        mock_import_module.side_effect = ModuleNotFoundError

The variable ModuleNotFoundError does not seem to be defined.

        with pytest.raises(ModuleNotFoundError):
            self.controller.reload_napp_module('kytos', 'napp', 'napp_file')

    @patch('kytos.core.controller.reload_module')
    @patch('kytos.core.controller.import_module')
    def test_reload_napp_module__import_error(self, *args):
        """Test reload_napp_module method when an import error occurs."""
        (mock_import_module, mock_reload_module) = args
        napp_module = MagicMock()
        mock_import_module.return_value = napp_module
        mock_reload_module.side_effect = ImportError

        with pytest.raises(ImportError):
            self.controller.reload_napp_module('kytos', 'napp', 'napp_file')

    @patch('kytos.core.controller.reload_module')
    @patch('kytos.core.controller.import_module')
    def test_reload_napp_module(self, *args):
        """Test reload_napp_module method."""
        (mock_import_module, mock_reload_module) = args
        napp_module = MagicMock()
        mock_import_module.return_value = napp_module

        self.controller.reload_napp_module('kytos', 'napp', 'napp_file')

        mock_import_module.assert_called_with('napps.kytos.napp.napp_file')
        mock_reload_module.assert_called_with(napp_module)

    @patch('kytos.core.controller.Controller.load_napp')
    @patch('kytos.core.controller.Controller.unload_napp')
    @patch('kytos.core.controller.Controller.reload_napp_module')
    def test_reload_napp(self, *args):
        """Test reload_napp method."""
        (mock_reload_napp_module, mock_unload, mock_load) = args

        code = self.controller.reload_napp('kytos', 'napp')

        mock_unload.assert_called_with('kytos', 'napp')
        calls = [call('kytos', 'napp', 'settings'),
                 call('kytos', 'napp', 'main')]
        mock_reload_napp_module.assert_has_calls(calls)
        mock_load.assert_called_with('kytos', 'napp')
        assert code == 200

    @patch('kytos.core.controller.Controller.unload_napp')
    @patch('kytos.core.controller.Controller.reload_napp_module')
    def test_reload_napp__error(self, *args):
        """Test reload_napp method to error case."""
        (mock_reload_napp_module, _) = args
        mock_reload_napp_module.side_effect = ModuleNotFoundError

The variable ModuleNotFoundError does not seem to be defined.

        code = self.controller.reload_napp('kytos', 'napp')

        assert code == 400

    @patch('kytos.core.controller.Controller.reload_napp', return_value=200)
    def test_rest_reload_napp(self, mock_reload_napp):
        """Test rest_reload_napp method."""
        req = Request(
            scope={
                "type": "http",
                "path_params": {"username": "kytos", "napp_name": "napp"},
            }
        )
        resp = self.controller.rest_reload_napp(req)

        mock_reload_napp.assert_called_with('kytos', 'napp')
        assert json.loads(resp.body.decode()) == 'reloaded'
        assert resp.status_code == 200

    @patch('kytos.core.controller.Controller.reload_napp')
    def test_rest_reload_all_napps(self, mock_reload_napp):
        """Test rest_reload_all_napps method."""
        req = Request(
            scope={
                "type": "http",
                "path_params": {"username": "kytos", "napp_name": "napp"},
            }
        )
        self.controller.napps = [('kytos', 'napp')]
        resp = self.controller.rest_reload_all_napps(req)

        mock_reload_napp.assert_called_with('kytos', 'napp')
        assert json.loads(resp.body.decode()) == 'reloaded'
        assert resp.status_code == 200

    def test_init_attrs(self):
        """Test init attrs."""
        self.controller.start_auth()
        assert self.controller.auth
        assert self.controller.dead_letter

    def test_try_to_fmt_traceback_msg(self) -> None:
        """Test test_try_to_fmt_traceback_msg."""
        counter = Counter(range(5))
        msg = "some traceback msg"
        fmt_msg = self.controller._try_to_fmt_traceback_msg(msg, counter)
        assert msg in fmt_msg
        assert "counters" in fmt_msg

    def test_config_default_maxsize_multiplier(self) -> None:
        """Test KytosConfig default maxsize multiplier."""
        event_buffer_conf = self.controller.options.event_buffer_conf
        assert event_buffer_conf
        queues = event_buffer_conf.values()
        assert queues
        for queue in queues:
            assert queue["queue"]["maxsize_multiplier"] == 2

    def test_get_links_from_interfaces(self) -> None:
        """Test get_links_from_interfaces."""
        interfaces = [MagicMock(id=f"intf{n}") for n in range(4)]
        links = {
            "link1": MagicMock(id="link1",
                               endpoint_a=interfaces[0],
                               endpoint_b=interfaces[1]),
            "link2": MagicMock(id="link2",
                               endpoint_a=interfaces[2],
                               endpoint_b=interfaces[3]),
        }
        self.controller.links = links
        response = self.controller.get_links_from_interfaces(interfaces)
        assert links == response
        response = self.controller.get_links_from_interfaces(interfaces[:2])
        assert response == {"link1": links["link1"]}

    def test_get_link(self) -> None:
        """Test get_link."""
        dpid_a = "00:00:00:00:00:00:00:01"
        dpid_b = "00:00:00:00:00:00:00:02"
        mock_switch_a = get_switch_mock(dpid_a, 0x04)
        mock_switch_b = get_switch_mock(dpid_b, 0x04)
        mock_interface_a = get_interface_mock('s1-eth1', 1, mock_switch_a)
        mock_interface_b = get_interface_mock('s2-eth1', 1, mock_switch_b)
        mock_link = get_link_mock(mock_interface_a, mock_interface_b)

        self.controller.links = {"link1": mock_link}
        assert self.controller.get_link("link1") == mock_link

    def test_get_link_or_create(self):
        """Test _get_link_or_create."""
        dpid_a = "00:00:00:00:00:00:00:01"
        dpid_b = "00:00:00:00:00:00:00:02"
        mock_switch_a = get_switch_mock(dpid_a, 0x04)
        mock_switch_b = get_switch_mock(dpid_b, 0x04)
        mock_interface_a = get_interface_mock('s1-eth1', 1, mock_switch_a)
        mock_interface_b = get_interface_mock('s2-eth1', 1, mock_switch_b)
        mock_interface_a.id = dpid_a
        mock_interface_a.link = None
        mock_interface_b.id = dpid_b
        mock_interface_b.link = None

        link, created = self.controller.get_link_or_create(mock_interface_a,
                                                           mock_interface_b)
        mock_interface_a.link = link
        mock_interface_b.link = link
        assert created
        assert len(self.controller.links) == 1
        assert link.endpoint_a.id == dpid_a
        assert link.endpoint_b.id == dpid_b
        assert mock_interface_a.nni is True
        mock_interface_a.update_link.assert_called()
        assert mock_interface_b.nni is True
        mock_interface_b.update_link.assert_called()

        link, created = self.controller.get_link_or_create(mock_interface_a,
                                                           mock_interface_b)
        assert not created
        assert len(self.controller.links) == 1

        # enable link
        link_dict = {'enabled': True}
        self.controller.links = {}
        link, _ = self.controller.get_link_or_create(
            mock_interface_a, mock_interface_b, link_dict
        )
        assert link._enabled is True
        # disable link
        link_dict = {'enabled': False}
        self.controller.links = {}
        link, _ = self.controller.get_link_or_create(
            mock_interface_a, mock_interface_b, link_dict
        )
        assert link._enabled is False

    def test_detect_mismatched_link(self):
        """Test detect_mismatched_link"""
        mock_link_1 = MagicMock(id='link_1')
        mock_link_1.endpoint_a = MagicMock(link=mock_link_1)
        mock_link_1.endpoint_b = MagicMock(link=None)
        assert self.controller.detect_mismatched_link(mock_link_1)

        mock_link_1.endpoint_a.link = None
        mock_link_1.endpoint_b.link = mock_link_1
        assert self.controller.detect_mismatched_link(mock_link_1)

        mock_link_2 = MagicMock(id='link_2')
        mock_link_1.endpoint_a.link = mock_link_2
        assert self.controller.detect_mismatched_link(mock_link_1)

        mock_link_1.endpoint_a.link = mock_link_1
        assert not self.controller.detect_mismatched_link(mock_link_1)

    @patch('kytos.core.controller.Controller.detect_mismatched_link')
    def test_link_status_mismatched(self, mock_detect_mismatched_link):
        """Test link_status_mismatched"""
        mock_link_1 = MagicMock()
        mock_detect_mismatched_link.return_value = True
        assert (self.controller.link_status_mismatched(mock_link_1)
                == EntityStatus.DOWN)

        mock_detect_mismatched_link.return_value = False
        assert self.controller.link_status_mismatched(mock_link_1) is None

    def test_get_link_or_create_old_mismatched_link(self):
        """Test _get_link_or_create with recently added old link
         which was mismatched.
         Also testing detect_mismatched_link."""
        dpid_a = "00:00:00:00:00:00:00:01"
        dpid_b = "00:00:00:00:00:00:00:02"
        mock_switch_a = get_switch_mock(dpid_a, 0x04)
        mock_switch_b = get_switch_mock(dpid_b, 0x04)
        mock_interface_a = get_interface_mock('s1-eth1', 1, mock_switch_a)
        mock_interface_b = get_interface_mock('s2-eth1', 1, mock_switch_b)
        mock_interface_c = get_interface_mock('s2-eth2', 2, mock_switch_b)
        mock_interface_a.id = dpid_a + ':1'
        mock_interface_a.link = None
        mock_interface_b.id = dpid_b + ':1'
        mock_interface_b.link = None
        mock_interface_c.id = dpid_b + ':2'
        mock_interface_c.link = None
        link1, _ = self.controller.get_link_or_create(mock_interface_a,
                                                      mock_interface_b)
        mock_interface_a.link = link1
        mock_interface_b.link = link1

        # Create mismatching
        link2, _ = self.controller.get_link_or_create(mock_interface_a,
                                                      mock_interface_c)
        mock_interface_a.link = link2
        mock_interface_c.link = link2

        assert self.controller.detect_mismatched_link(link1)
        link1.add_metadata('old_data', 'important_data')
        assert link1.metadata.get('old_data')

        # Clean link1 mismatch and make link2 mismatched
        actual_link, _ = self.controller.get_link_or_create(mock_interface_a,
                                                            mock_interface_b)
        mock_interface_a.link = actual_link
        mock_interface_b.link = actual_link

        assert actual_link == link1
        assert self.controller.detect_mismatched_link(link2)
        assert not self.controller.detect_mismatched_link(link1)

    def test_get_link_or_create_mismatched(self):
        """Test _get_link_or_create with mismatched link."""
        dpid_a = "00:00:00:00:00:00:00:01"
        dpid_b = "00:00:00:00:00:00:00:02"
        mock_switch_a = get_switch_mock(dpid_a, 0x04)
        mock_switch_b = get_switch_mock(dpid_b, 0x04)
        mock_interface_a = get_interface_mock('s1-eth1', 1, mock_switch_a)
        mock_interface_b = get_interface_mock('s2-eth1', 1, mock_switch_b)
        mock_interface_c = get_interface_mock('s2-eth2', 2, mock_switch_b)
        mock_interface_a.id = dpid_a + ':1'
        mock_interface_a.link = None
        mock_interface_b.id = dpid_b + ':1'
        mock_interface_b.link = None
        mock_interface_c.id = dpid_b + ':2'
        mock_interface_c.link = None

        link1, created = self.controller.get_link_or_create(mock_interface_a,
                                                            mock_interface_b)
        assert created
        assert link1.endpoint_a.id == mock_interface_a.id
        assert link1.endpoint_b.id == mock_interface_b.id

        mock_interface_a.link = link1
        mock_interface_b.link = link1

        link2, created = self.controller.get_link_or_create(mock_interface_a,
                                                            mock_interface_c)
        assert created
        assert self.controller.log.warning.call_count == 1
        assert link2.endpoint_a.id == mock_interface_a.id
        assert link2.endpoint_b.id == mock_interface_c.id

        mock_interface_a.link = link2
        mock_interface_c.link = link2

        link3, created = self.controller.get_link_or_create(mock_interface_b,
                                                            mock_interface_c)
        assert created
        assert self.controller.log.warning.call_count == 3
        assert link3.endpoint_a.id == mock_interface_b.id
        assert link3.endpoint_b.id == mock_interface_c.id


class TestControllerAsync:

    """TestControllerAsync."""

    async def test_start_controller(self, controller, monkeypatch):
        """Test start controller."""
        controller._buffers = KytosBuffers()
        controller.loop = MagicMock()
        server = MagicMock()
        monkeypatch.setattr("kytos.core.controller.KytosServer", server)
        napp = MagicMock()
        controller._pool = MagicMock()
        controller.pre_install_napps = MagicMock()
        controller.api_server = MagicMock()
        controller.load_napps = MagicMock()
        controller.options.napps_pre_installed = [napp]
        await controller.start_controller()
        assert controller.buffers

        controller.server.serve_forever.assert_called()
        all_buffers = controller.buffers.get_all_buffers()
        # It's expected that all buffers have a task + the api server task
        assert controller.loop.create_task.call_count == len(all_buffers) + 1
        assert len(controller._tasks) == len(all_buffers) + 1
        controller.pre_install_napps.assert_called_with([napp])
        controller.load_napps.assert_called()
        controller.api_server.start_web_ui.assert_called()

        # These monitors are expected by default
        expected_buffer_qmons = ["msg_in", "msg_out", "raw", "app"]
        expected_tp_qmons = ["sb", "app", "db"]
        expected_len = len(expected_tp_qmons) + len(expected_buffer_qmons)
        assert len(controller.qmonitors) == expected_len

    async def test_stop_controller(self, controller):
        """Test stop_controller method."""
        controller.loop = MagicMock()
        api_server = MagicMock()
        napp_dir_listener = MagicMock()
        controller.server = MagicMock()
        controller.unload_napps = MagicMock()
        controller._buffers = MagicMock()
        controller.api_server = api_server
        controller.napp_dir_listener = napp_dir_listener
        controller.stop_queue_monitors = MagicMock()
        controller.apm = MagicMock()

        controller.stop_controller()
        controller.apm.close.assert_called()
        controller.buffers.send_stop_signal.assert_called()
        api_server.stop.assert_called()
        napp_dir_listener.stop.assert_called()
        controller.unload_napps.assert_called()
        controller.server.shutdown.assert_called()
        controller.loop.stop.assert_called()
        controller.stop_queue_monitors.assert_called()

    async def test_raw_event_handler(self, controller):
        """Test raw_event_handler async method by handling a shutdown event."""
        controller._buffers = KytosBuffers()
        event = KytosEvent("kytos/core.shutdown")
        controller.notify_listeners = MagicMock()
        await controller.buffers.raw._queue.async_q.put(event)
        await controller.event_handler("raw")
        controller.notify_listeners.assert_called_with(event)

    async def test_msg_in_event_handler(self, controller):
        """Test msg_in_event_handler async method by handling a shutdown
           event."""
        controller._buffers = KytosBuffers()
        event = KytosEvent("kytos/core.shutdown")
        controller.notify_listeners = MagicMock()
        await controller.buffers.msg_in._queue.async_q.put(event)
        await controller.event_handler("msg_in")
        controller.notify_listeners.assert_called_with(event)

    async def test_msg_out_event_handler(self, controller):
        """Test msg_out_event_handler async method by handling a common and a
           shutdown event."""
        controller._buffers = KytosBuffers()
        controller.notify_listeners = MagicMock()
        dst = MagicMock()
        dst.state = 0
        packet = MagicMock()
        msg = MagicMock()
        msg.pack.return_value = packet

        event_1 = KytosEvent('kytos/core.any',
                             content={'message': msg, 'destination': dst})
        event_2 = KytosEvent('kytos/core.shutdown')

        await controller.buffers.msg_out._queue.async_q.put(event_1)
        await controller.buffers.msg_out._queue.async_q.put(event_2)
        await controller.msg_out_event_handler()
        dst.send.assert_called_with(packet)
        controller.notify_listeners.assert_called_with(event_1)

    async def test_msg_out_event_handler_pack_exc(self, controller):
        """Test msg_out_event_handler async pack exception."""
        controller._buffers = KytosBuffers()
        dst, msg = MagicMock(), MagicMock()
        dst.state = 0
        msg.pack.side_effect = PackException("some error")
        event_1 = KytosEvent('kytos/core.any',
                             content={'message': msg, 'destination': dst})
        event_2 = KytosEvent('kytos/core.shutdown')

        await controller.buffers.msg_out._queue.async_q.put(event_1)
        await controller.buffers.msg_out._queue.async_q.put(event_2)
        await controller.msg_out_event_handler()
        assert controller.log.error.call_count == 1

    async def test_msg_out_event_handler_broad_exc(self, controller):
        """Test msg_out_event_handler async broad exception."""
        controller._buffers = KytosBuffers()
        dst, msg = MagicMock(), MagicMock()
        dst.state = 0
        msg.pack.side_effect = ValueError("some error")
        event_1 = KytosEvent('kytos/core.any',
                             content={'message': msg, 'destination': dst})
        event_2 = KytosEvent('kytos/core.shutdown')

        await controller.buffers.msg_out._queue.async_q.put(event_1)
        await controller.buffers.msg_out._queue.async_q.put(event_2)
        await controller.msg_out_event_handler()
        assert controller.log.exception.call_count == 1

    async def test_app_event_handler(self, controller):
        """Test app_event_handler async method by handling a shutdown event."""
        controller._buffers = KytosBuffers()
        event = KytosEvent("kytos/core.shutdown")
        controller.notify_listeners = MagicMock()
        await controller.buffers.app._queue.async_q.put(event)
        await controller.event_handler("app")
        controller.notify_listeners.assert_called_with(event)

    async def test_app_event_handler_exc(self, controller):
        """Test app_event_handler async method exc."""
        controller._buffers = KytosBuffers()
        event1 = KytosEvent("kytos/core.any", content={"message": ""})
        event2 = KytosEvent("kytos/core.shutdown")
        controller.notify_listeners = MagicMock()
        controller.notify_listeners.side_effect = [ValueError("some error"), 1]
        await controller.buffers.app._queue.async_q.put(event1)
        await controller.buffers.app._queue.async_q.put(event2)
        await controller.event_handler("app")
        assert controller.log.exception.call_count == 1
        controller.notify_listeners.assert_called_with(event2)

    async def test_configuration_endpoint(self, controller, api_client):
        """Should return the attribute options as json."""
        expected = vars(controller.options)
        expected.pop("jwt_secret", None)
        resp = await api_client.get("kytos/core/config")
        assert resp.status_code == 200
        assert expected == resp.json()

    async def test_publish_connection_error(self, controller):
        """Test publish_connection_error."""
        controller.buffers.conn.aput = AsyncMock()
        await controller.publish_connection_error(MagicMock())
        controller.buffers.conn.aput.assert_called()

    async def test_full_queue_counter(self, controller) -> None:
        """Test full queue counter."""
        maxsize = 2
        queue = Queue(maxsize=maxsize)
        buffer = KytosEventBuffer("app", queue)
        for i in range(maxsize):
            await buffer.aput(KytosEvent(str(i)))
        assert buffer.full()
        controller._buffers.get_all_buffers.return_value = [buffer]
        counter = controller._full_queue_counter()
        assert counter
        assert len(counter["app"]) == maxsize
        queue.close()
        await queue.wait_closed()