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

# Copyright (c) 2018 Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

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


from units.compat import unittest
from unittest.mock import patch, MagicMock

from ansible.executor.play_iterator import PlayIterator
from ansible.playbook import Playbook
from ansible.playbook.play_context import PlayContext
from ansible.plugins.strategy.linear import StrategyModule
from ansible.executor.task_queue_manager import TaskQueueManager

from units.mock.loader import DictDataLoader
from units.mock.path import mock_unfrackpath_noop


class TestStrategyLinear(unittest.TestCase):

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_noop(self):
        fake_loader = DictDataLoader({
            "test_play.yml": """
            - hosts: all
              gather_facts: no
              tasks:
                - block:
                   - block:
                     - name: task1
                       debug: msg='task1'
                       failed_when: inventory_hostname == 'host01'

                     - name: task2
                       debug: msg='task2'

                     rescue:
                       - name: rescue1
                         debug: msg='rescue1'

                       - name: rescue2
                         debug: msg='rescue2'
            """,
        })

        mock_var_manager = MagicMock()
        mock_var_manager._fact_cache = dict()
        mock_var_manager.get_vars.return_value = dict()

        p = Playbook.load('test_play.yml', loader=fake_loader, variable_manager=mock_var_manager)

        inventory = MagicMock()
        inventory.hosts = {}
        hosts = []
        for i in range(0, 2):
            host = MagicMock()
            host.name = host.get_name.return_value = 'host%02d' % i
            hosts.append(host)
            inventory.hosts[host.name] = host
        inventory.get_hosts.return_value = hosts
        inventory.filter_hosts.return_value = hosts

        mock_var_manager._fact_cache['host00'] = dict()

        play_context = PlayContext(play=p._entries[0])

        itr = PlayIterator(
            inventory=inventory,
            play=p._entries[0],
            play_context=play_context,
            variable_manager=mock_var_manager,
            all_vars=dict(),
        )

        tqm = TaskQueueManager(
            inventory=inventory,
            variable_manager=mock_var_manager,
            loader=fake_loader,
            passwords=None,
            forks=5,
        )
        tqm._initialize_processes(3)
        strategy = StrategyModule(tqm)
        strategy._hosts_cache = [h.name for h in hosts]
        strategy._hosts_cache_all = [h.name for h in hosts]

        # implicit meta: flush_handlers
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNotNone(host1_task)
        self.assertIsNotNone(host2_task)
        self.assertEqual(host1_task.action, 'meta')
        self.assertEqual(host2_task.action, 'meta')

        # debug: task1, debug: task1
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNotNone(host1_task)
        self.assertIsNotNone(host2_task)
        self.assertEqual(host1_task.action, 'debug')
        self.assertEqual(host2_task.action, 'debug')
        self.assertEqual(host1_task.name, 'task1')
        self.assertEqual(host2_task.name, 'task1')

        # mark the second host failed
        itr.mark_host_failed(hosts[1])

        # debug: task2, meta: noop
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNotNone(host1_task)
        self.assertIsNotNone(host2_task)
        self.assertEqual(host1_task.action, 'debug')
        self.assertEqual(host2_task.action, 'meta')
        self.assertEqual(host1_task.name, 'task2')
        self.assertEqual(host2_task.name, '')

        # meta: noop, debug: rescue1
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNotNone(host1_task)
        self.assertIsNotNone(host2_task)
        self.assertEqual(host1_task.action, 'meta')
        self.assertEqual(host2_task.action, 'debug')
        self.assertEqual(host1_task.name, '')
        self.assertEqual(host2_task.name, 'rescue1')

        # meta: noop, debug: rescue2
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNotNone(host1_task)
        self.assertIsNotNone(host2_task)
        self.assertEqual(host1_task.action, 'meta')
        self.assertEqual(host2_task.action, 'debug')
        self.assertEqual(host1_task.name, '')
        self.assertEqual(host2_task.name, 'rescue2')

        # implicit meta: flush_handlers
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNotNone(host1_task)
        self.assertIsNotNone(host2_task)
        self.assertEqual(host1_task.action, 'meta')
        self.assertEqual(host2_task.action, 'meta')

        # implicit meta: flush_handlers
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNotNone(host1_task)
        self.assertIsNotNone(host2_task)
        self.assertEqual(host1_task.action, 'meta')
        self.assertEqual(host2_task.action, 'meta')

        # end of iteration
        hosts_left = strategy.get_hosts_left(itr)
        hosts_tasks = strategy._get_next_task_lockstep(hosts_left, itr)
        host1_task = hosts_tasks[0][1]
        host2_task = hosts_tasks[1][1]
        self.assertIsNone(host1_task)
        self.assertIsNone(host2_task)