ansible/test/units/plugins/strategy/test_strategy_base.py

# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

from units.mock.loader import DictDataLoader
from copy import deepcopy
import uuid

from ansible.compat.tests import unittest
from ansible.compat.tests.mock import patch, MagicMock
from ansible.errors import AnsibleError, AnsibleParserError
from ansible.executor.process.worker import WorkerProcess
from ansible.executor.task_queue_manager import TaskQueueManager
from ansible.executor.task_result import TaskResult
from ansible.inventory.host import Host
from ansible.module_utils.six.moves import queue as Queue
from ansible.playbook.block import Block
from ansible.playbook.handler import Handler
from ansible.plugins.strategy import StrategyBase


class TestStrategyBase(unittest.TestCase):

    def setUp(self):
        pass

    def tearDown(self):
        pass

    def test_strategy_base_init(self):
        queue_items = []

        def _queue_empty(*args, **kwargs):
            return len(queue_items) == 0

        def _queue_get(*args, **kwargs):
            if len(queue_items) == 0:
                raise Queue.Empty
            else:
                return queue_items.pop()

        def _queue_put(item, *args, **kwargs):
            queue_items.append(item)

        mock_queue = MagicMock()
        mock_queue.empty.side_effect = _queue_empty
        mock_queue.get.side_effect = _queue_get
        mock_queue.put.side_effect = _queue_put

        mock_tqm = MagicMock(TaskQueueManager)
        mock_tqm._final_q = mock_queue
        mock_tqm._options = MagicMock()
        mock_tqm._notified_handlers = {}
        mock_tqm._listening_handlers = {}
        strategy_base = StrategyBase(tqm=mock_tqm)
        strategy_base.cleanup()

    def test_strategy_base_run(self):
        queue_items = []

        def _queue_empty(*args, **kwargs):
            return len(queue_items) == 0

        def _queue_get(*args, **kwargs):
            if len(queue_items) == 0:
                raise Queue.Empty
            else:
                return queue_items.pop()

        def _queue_put(item, *args, **kwargs):
            queue_items.append(item)

        mock_queue = MagicMock()
        mock_queue.empty.side_effect = _queue_empty
        mock_queue.get.side_effect = _queue_get
        mock_queue.put.side_effect = _queue_put

        mock_tqm = MagicMock(TaskQueueManager)
        mock_tqm._final_q = mock_queue
        mock_tqm._stats = MagicMock()
        mock_tqm._notified_handlers = {}
        mock_tqm._listening_handlers = {}
        mock_tqm.send_callback.return_value = None

        for attr in ('RUN_OK', 'RUN_ERROR', 'RUN_FAILED_HOSTS', 'RUN_UNREACHABLE_HOSTS'):
            setattr(mock_tqm, attr, getattr(TaskQueueManager, attr))

        mock_iterator = MagicMock()
        mock_iterator._play = MagicMock()
        mock_iterator._play.handlers = []

        mock_play_context = MagicMock()

        mock_tqm._failed_hosts = dict()
        mock_tqm._unreachable_hosts = dict()
        mock_tqm._options = MagicMock()
        mock_tqm._notified_handlers = {}
        mock_tqm._listening_handlers = {}
        strategy_base = StrategyBase(tqm=mock_tqm)

        mock_host = MagicMock()
        mock_host.name = 'host1'

        self.assertEqual(strategy_base.run(iterator=mock_iterator, play_context=mock_play_context), mock_tqm.RUN_OK)
        self.assertEqual(strategy_base.run(iterator=mock_iterator, play_context=mock_play_context, result=TaskQueueManager.RUN_ERROR), mock_tqm.RUN_ERROR)
        mock_tqm._failed_hosts = dict(host1=True)
        mock_iterator.get_failed_hosts.return_value = [mock_host]
        self.assertEqual(strategy_base.run(iterator=mock_iterator, play_context=mock_play_context, result=False), mock_tqm.RUN_FAILED_HOSTS)
        mock_tqm._unreachable_hosts = dict(host1=True)
        mock_iterator.get_failed_hosts.return_value = []
        self.assertEqual(strategy_base.run(iterator=mock_iterator, play_context=mock_play_context, result=False), mock_tqm.RUN_UNREACHABLE_HOSTS)
        strategy_base.cleanup()

    def test_strategy_base_get_hosts(self):
        queue_items = []

        def _queue_empty(*args, **kwargs):
            return len(queue_items) == 0

        def _queue_get(*args, **kwargs):
            if len(queue_items) == 0:
                raise Queue.Empty
            else:
                return queue_items.pop()

        def _queue_put(item, *args, **kwargs):
            queue_items.append(item)

        mock_queue = MagicMock()
        mock_queue.empty.side_effect = _queue_empty
        mock_queue.get.side_effect = _queue_get
        mock_queue.put.side_effect = _queue_put

        mock_hosts = []
        for i in range(0, 5):
            mock_host = MagicMock()
            mock_host.name = "host%02d" % (i + 1)
            mock_host.has_hostkey = True
            mock_hosts.append(mock_host)

        mock_inventory = MagicMock()
        mock_inventory.get_hosts.return_value = mock_hosts

        mock_tqm = MagicMock()
        mock_tqm._final_q = mock_queue
        mock_tqm._notified_handlers = {}
        mock_tqm._listening_handlers = {}
        mock_tqm.get_inventory.return_value = mock_inventory

        mock_play = MagicMock()
        mock_play.hosts = ["host%02d" % (i + 1) for i in range(0, 5)]

        strategy_base = StrategyBase(tqm=mock_tqm)

        mock_tqm._failed_hosts = []
        mock_tqm._unreachable_hosts = []
        self.assertEqual(strategy_base.get_hosts_remaining(play=mock_play), mock_hosts)

        mock_tqm._failed_hosts = ["host01"]
        self.assertEqual(strategy_base.get_hosts_remaining(play=mock_play), mock_hosts[1:])
        self.assertEqual(strategy_base.get_failed_hosts(play=mock_play), [mock_hosts[0]])

        mock_tqm._unreachable_hosts = ["host02"]
        self.assertEqual(strategy_base.get_hosts_remaining(play=mock_play), mock_hosts[2:])
        strategy_base.cleanup()

    @patch.object(WorkerProcess, 'run')
    def test_strategy_base_queue_task(self, mock_worker):
        def fake_run(self):
            return

        mock_worker.run.side_effect = fake_run

        fake_loader = DictDataLoader()
        mock_var_manager = MagicMock()
        mock_host = MagicMock()
        mock_host.get_vars.return_value = dict()
        mock_host.has_hostkey = True
        mock_inventory = MagicMock()
        mock_inventory.get.return_value = mock_host
        mock_options = MagicMock()
        mock_options.module_path = None

        tqm = TaskQueueManager(
            inventory=mock_inventory,
            variable_manager=mock_var_manager,
            loader=fake_loader,
            options=mock_options,
            passwords=None,
        )
        tqm._initialize_processes(3)
        tqm.hostvars = dict()

        mock_task = MagicMock()
        mock_task._uuid = 'abcd'

        try:
            strategy_base = StrategyBase(tqm=tqm)
            strategy_base._queue_task(host=mock_host, task=mock_task, task_vars=dict(), play_context=MagicMock())
            self.assertEqual(strategy_base._cur_worker, 1)
            self.assertEqual(strategy_base._pending_results, 1)
            strategy_base._queue_task(host=mock_host, task=mock_task, task_vars=dict(), play_context=MagicMock())
            self.assertEqual(strategy_base._cur_worker, 2)
            self.assertEqual(strategy_base._pending_results, 2)
            strategy_base._queue_task(host=mock_host, task=mock_task, task_vars=dict(), play_context=MagicMock())
            self.assertEqual(strategy_base._cur_worker, 0)
            self.assertEqual(strategy_base._pending_results, 3)
        finally:
            tqm.cleanup()

    def test_strategy_base_process_pending_results(self):
        mock_tqm = MagicMock()
        mock_tqm._terminated = False
        mock_tqm._failed_hosts = dict()
        mock_tqm._unreachable_hosts = dict()
        mock_tqm.send_callback.return_value = None
        mock_tqm._notified_handlers = {}
        mock_tqm._listening_handlers = {}

        queue_items = []

        def _queue_empty(*args, **kwargs):
            return len(queue_items) == 0

        def _queue_get(*args, **kwargs):
            if len(queue_items) == 0:
                raise Queue.Empty
            else:
                return queue_items.pop()

        def _queue_put(item, *args, **kwargs):
            queue_items.append(item)

        mock_queue = MagicMock()
        mock_queue.empty.side_effect = _queue_empty
        mock_queue.get.side_effect = _queue_get
        mock_queue.put.side_effect = _queue_put
        mock_tqm._final_q = mock_queue

        mock_tqm._stats = MagicMock()
        mock_tqm._stats.increment.return_value = None

        mock_play = MagicMock()

        mock_host = MagicMock()
        mock_host.name = 'test01'
        mock_host.vars = dict()
        mock_host.get_vars.return_value = dict()
        mock_host.has_hostkey = True

        mock_task = MagicMock()
        mock_task._role = None
        mock_task._parent = None
        mock_task.ignore_errors = False
        mock_task.ignore_unreachable = False
        mock_task._uuid = uuid.uuid4()
        mock_task.loop = None
        mock_task.copy.return_value = mock_task

        mock_handler_task = MagicMock(Handler)
        mock_handler_task.name = 'test handler'
        mock_handler_task.action = 'foo'
        mock_handler_task._parent = None
        mock_handler_task.get_name.return_value = "test handler"
        mock_handler_task.has_triggered.return_value = False
        mock_handler_task._uuid = 'xxxxxxxxxxxxx'
        mock_handler_task.copy.return_value = mock_handler_task

        mock_iterator = MagicMock()
        mock_iterator._play = mock_play
        mock_iterator.mark_host_failed.return_value = None
        mock_iterator.get_next_task_for_host.return_value = (None, None)

        mock_handler_block = MagicMock()
        mock_handler_block.block = [mock_handler_task]
        mock_handler_block.rescue = []
        mock_handler_block.always = []
        mock_play.handlers = [mock_handler_block]

        mock_tqm._notified_handlers = {mock_handler_task._uuid: []}
        mock_tqm._listening_handlers = {}

        mock_group = MagicMock()
        mock_group.add_host.return_value = None

        def _get_host(host_name):
            if host_name == 'test01':
                return mock_host
            return None

        def _get_group(group_name):
            if group_name in ('all', 'foo'):
                return mock_group
            return None

        mock_inventory = MagicMock()
        mock_inventory._hosts_cache = dict()
        mock_inventory.hosts.return_value = mock_host
        mock_inventory.get_host.side_effect = _get_host
        mock_inventory.get_group.side_effect = _get_group
        mock_inventory.clear_pattern_cache.return_value = None
        mock_inventory.get_host_vars.return_value = {}
        mock_inventory.hosts.get.return_value = mock_host

        mock_var_mgr = MagicMock()
        mock_var_mgr.set_host_variable.return_value = None
        mock_var_mgr.set_host_facts.return_value = None
        mock_var_mgr.get_vars.return_value = dict()

        strategy_base = StrategyBase(tqm=mock_tqm)
        strategy_base._inventory = mock_inventory
        strategy_base._variable_manager = mock_var_mgr
        strategy_base._blocked_hosts = dict()

        def _has_dead_workers():
            return False

        strategy_base._tqm.has_dead_workers.side_effect = _has_dead_workers
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 0)

        task_result = TaskResult(host=mock_host.name, task=mock_task._uuid, return_data=dict(changed=True))
        queue_items.append(task_result)
        strategy_base._blocked_hosts['test01'] = True
        strategy_base._pending_results = 1

        mock_queued_task_cache = {
            (mock_host.name, mock_task._uuid): {
                'task': mock_task,
                'host': mock_host,
                'task_vars': {},
                'play_context': {},
            }
        }

        strategy_base._queued_task_cache = deepcopy(mock_queued_task_cache)
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 1)
        self.assertEqual(results[0], task_result)
        self.assertEqual(strategy_base._pending_results, 0)
        self.assertNotIn('test01', strategy_base._blocked_hosts)

        task_result = TaskResult(host=mock_host.name, task=mock_task._uuid, return_data='{"failed":true}')
        queue_items.append(task_result)
        strategy_base._blocked_hosts['test01'] = True
        strategy_base._pending_results = 1
        mock_iterator.is_failed.return_value = True
        strategy_base._queued_task_cache = deepcopy(mock_queued_task_cache)
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 1)
        self.assertEqual(results[0], task_result)
        self.assertEqual(strategy_base._pending_results, 0)
        self.assertNotIn('test01', strategy_base._blocked_hosts)
        # self.assertIn('test01', mock_tqm._failed_hosts)
        # del mock_tqm._failed_hosts['test01']
        mock_iterator.is_failed.return_value = False

        task_result = TaskResult(host=mock_host.name, task=mock_task._uuid, return_data='{"unreachable": true}')
        queue_items.append(task_result)
        strategy_base._blocked_hosts['test01'] = True
        strategy_base._pending_results = 1
        strategy_base._queued_task_cache = deepcopy(mock_queued_task_cache)
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 1)
        self.assertEqual(results[0], task_result)
        self.assertEqual(strategy_base._pending_results, 0)
        self.assertNotIn('test01', strategy_base._blocked_hosts)
        self.assertIn('test01', mock_tqm._unreachable_hosts)
        del mock_tqm._unreachable_hosts['test01']

        task_result = TaskResult(host=mock_host.name, task=mock_task._uuid, return_data='{"skipped": true}')
        queue_items.append(task_result)
        strategy_base._blocked_hosts['test01'] = True
        strategy_base._pending_results = 1
        strategy_base._queued_task_cache = deepcopy(mock_queued_task_cache)
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 1)
        self.assertEqual(results[0], task_result)
        self.assertEqual(strategy_base._pending_results, 0)
        self.assertNotIn('test01', strategy_base._blocked_hosts)

        queue_items.append(TaskResult(host=mock_host.name, task=mock_task._uuid, return_data=dict(add_host=dict(host_name='newhost01', new_groups=['foo']))))
        strategy_base._blocked_hosts['test01'] = True
        strategy_base._pending_results = 1
        strategy_base._queued_task_cache = deepcopy(mock_queued_task_cache)
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 1)
        self.assertEqual(strategy_base._pending_results, 0)
        self.assertNotIn('test01', strategy_base._blocked_hosts)

        queue_items.append(TaskResult(host=mock_host.name, task=mock_task._uuid, return_data=dict(add_group=dict(group_name='foo'))))
        strategy_base._blocked_hosts['test01'] = True
        strategy_base._pending_results = 1
        strategy_base._queued_task_cache = deepcopy(mock_queued_task_cache)
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 1)
        self.assertEqual(strategy_base._pending_results, 0)
        self.assertNotIn('test01', strategy_base._blocked_hosts)

        queue_items.append(TaskResult(host=mock_host.name, task=mock_task._uuid, return_data=dict(changed=True, _ansible_notify=['test handler'])))
        strategy_base._blocked_hosts['test01'] = True
        strategy_base._pending_results = 1
        strategy_base._queued_task_cache = deepcopy(mock_queued_task_cache)
        results = strategy_base._wait_on_pending_results(iterator=mock_iterator)
        self.assertEqual(len(results), 1)
        self.assertEqual(strategy_base._pending_results, 0)
        self.assertNotIn('test01', strategy_base._blocked_hosts)
        self.assertIn(mock_handler_task._uuid, strategy_base._notified_handlers)
        self.assertIn(mock_host, strategy_base._notified_handlers[mock_handler_task._uuid])

        # queue_items.append(('set_host_var', mock_host, mock_task, None, 'foo', 'bar'))
        # results = strategy_base._process_pending_results(iterator=mock_iterator)
        # self.assertEqual(len(results), 0)
        # self.assertEqual(strategy_base._pending_results, 1)

        # queue_items.append(('set_host_facts', mock_host, mock_task, None, 'foo', dict()))
        # results = strategy_base._process_pending_results(iterator=mock_iterator)
        # self.assertEqual(len(results), 0)
        # self.assertEqual(strategy_base._pending_results, 1)

        # queue_items.append(('bad'))
        # self.assertRaises(AnsibleError, strategy_base._process_pending_results, iterator=mock_iterator)
        strategy_base.cleanup()

    def test_strategy_base_load_included_file(self):
        fake_loader = DictDataLoader({
            "test.yml": """
            - debug: msg='foo'
            """,
            "bad.yml": """
            """,
        })

        queue_items = []

        def _queue_empty(*args, **kwargs):
            return len(queue_items) == 0

        def _queue_get(*args, **kwargs):
            if len(queue_items) == 0:
                raise Queue.Empty
            else:
                return queue_items.pop()

        def _queue_put(item, *args, **kwargs):
            queue_items.append(item)

        mock_queue = MagicMock()
        mock_queue.empty.side_effect = _queue_empty
        mock_queue.get.side_effect = _queue_get
        mock_queue.put.side_effect = _queue_put

        mock_tqm = MagicMock()
        mock_tqm._final_q = mock_queue
        mock_tqm._notified_handlers = {}
        mock_tqm._listening_handlers = {}

        strategy_base = StrategyBase(tqm=mock_tqm)
        strategy_base._loader = fake_loader
        strategy_base.cleanup()

        mock_play = MagicMock()

        mock_block = MagicMock()
        mock_block._play = mock_play
        mock_block.vars = dict()

        mock_task = MagicMock()
        mock_task._block = mock_block
        mock_task._role = None
        mock_task._parent = None

        mock_iterator = MagicMock()
        mock_iterator.mark_host_failed.return_value = None

        mock_inc_file = MagicMock()
        mock_inc_file._task = mock_task

        mock_inc_file._filename = "test.yml"
        res = strategy_base._load_included_file(included_file=mock_inc_file, iterator=mock_iterator)

        mock_inc_file._filename = "bad.yml"
        res = strategy_base._load_included_file(included_file=mock_inc_file, iterator=mock_iterator)
        self.assertEqual(res, [])

    @patch.object(WorkerProcess, 'run')
    def test_strategy_base_run_handlers(self, mock_worker):
        def fake_run(*args):
            return
        mock_worker.side_effect = fake_run
        mock_play_context = MagicMock()

        mock_handler_task = MagicMock(Handler)
        mock_handler_task.action = 'foo'
        mock_handler_task.get_name.return_value = "test handler"
        mock_handler_task.has_triggered.return_value = False
        mock_handler_task.listen = None
        mock_handler_task._role = None
        mock_handler_task._parent = None
        mock_handler_task._uuid = 'xxxxxxxxxxxxxxxx'
        mock_handler_task.copy.return_value = mock_handler_task

        mock_handler = MagicMock()
        mock_handler.block = [mock_handler_task]
        mock_handler.flag_for_host.return_value = False

        mock_play = MagicMock()
        mock_play.handlers = [mock_handler]

        mock_host = MagicMock(Host)
        mock_host.name = "test01"
        mock_host.has_hostkey = True

        mock_inventory = MagicMock()
        mock_inventory.get_hosts.return_value = [mock_host]
        mock_inventory.get.return_value = mock_host
        mock_inventory.get_host.return_value = mock_host

        mock_var_mgr = MagicMock()
        mock_var_mgr.get_vars.return_value = dict()

        mock_iterator = MagicMock()
        mock_iterator._play = mock_play

        fake_loader = DictDataLoader()
        mock_options = MagicMock()
        mock_options.module_path = None

        tqm = TaskQueueManager(
            inventory=mock_inventory,
            variable_manager=mock_var_mgr,
            loader=fake_loader,
            options=mock_options,
            passwords=None,
        )
        tqm._initialize_processes(3)
        tqm._initialize_notified_handlers(mock_play)
        tqm.hostvars = dict()

        try:
            strategy_base = StrategyBase(tqm=tqm)

            strategy_base._inventory = mock_inventory
            strategy_base._notified_handlers = {mock_handler_task._uuid: [mock_host]}

            task_result = TaskResult(mock_host.name, mock_handler_task._uuid, dict(changed=False))
            strategy_base._queued_task_cache = dict()
            strategy_base._queued_task_cache[(mock_host.name, mock_handler_task._uuid)] = {
                'task': mock_handler_task,
                'host': mock_host,
                'task_vars': {},
                'play_context': mock_play_context
            }
            tqm._final_q.put(task_result)

            result = strategy_base.run_handlers(iterator=mock_iterator, play_context=mock_play_context)
        finally:
            strategy_base.cleanup()
            tqm.cleanup()