scheduler/monitor_db_unittest.py

#!/usr/bin/python

import unittest, time, subprocess, os, StringIO, tempfile
import MySQLdb
import common
from autotest_lib.client.common_lib import global_config, host_protections
from autotest_lib.client.common_lib.test_utils import mock
from autotest_lib.database import database_connection, migrate
from autotest_lib.scheduler import monitor_db

from autotest_lib.frontend import django_test_utils
django_test_utils.setup_test_environ()
from autotest_lib.frontend.afe import models

_DEBUG = False

class Dummy(object):
    'Dummy object that can have attribute assigned to it'


class IsRow(mock.argument_comparator):
    def __init__(self, row_id):
        self.row_id = row_id


    def is_satisfied_by(self, parameter):
        return list(parameter)[0] == self.row_id


    def __str__(self):
        return 'row with id %s' % self.row_id


class BaseDispatcherTest(unittest.TestCase):
    _config_section = 'AUTOTEST_WEB'
    _test_db_initialized = False

    def _do_query(self, sql):
        self._database.execute(sql)


    @classmethod
    def _initialize_test_db(cls):
        if cls._test_db_initialized:
            return
        temp_fd, cls._test_db_file = tempfile.mkstemp(suffix='.monitor_test')
        os.close(temp_fd)
        django_test_utils.set_test_database(cls._test_db_file)
        django_test_utils.run_syncdb()
        cls._test_db_backup = django_test_utils.backup_test_database()
        cls._test_db_initialized = True


    def _open_test_db(self):
        self._initialize_test_db()
        django_test_utils.restore_test_database(self._test_db_backup)
        self._database = (
            database_connection.DatabaseConnection.get_test_database(
                self._test_db_file))
        self._database.connect()
        self._database.debug = _DEBUG


    def _close_test_db(self):
        self._database.disconnect()


    def _set_monitor_stubs(self):
        monitor_db._db = self._database


    def _fill_in_test_data(self):
        user = models.User.objects.create(login='my_user')
        acl_group = models.AclGroup.objects.create(name='my_acl')
        acl_group.users.add(user)

        hosts = [models.Host.objects.create(hostname=hostname) for hostname in
                 ('host1', 'host2', 'host3', 'host4')]
        acl_group.hosts = hosts

        labels = [models.Label.objects.create(name=name) for name in
                  ('label1', 'label2', 'label3')]
        labels[2].only_if_needed = True
        labels[2].save()
        hosts[0].labels.add(labels[0])
        hosts[1].labels.add(labels[1])


    def setUp(self):
        self.god = mock.mock_god()
        self._open_test_db()
        self._fill_in_test_data()
        self._set_monitor_stubs()
        self._dispatcher = monitor_db.Dispatcher()


    def tearDown(self):
        self._close_test_db()
        self.god.unstub_all()


    def _create_job(self, hosts=[], metahosts=[], priority=0, active=0,
                    synchronous=False):
        synch_type = synchronous and 2 or 1
        job = models.Job.objects.create(name='test', owner='my_user',
                                        priority=priority,
                                        synch_type=synch_type)
        for host_id in hosts:
            models.HostQueueEntry.objects.create(job=job, priority=priority,
                                                 host_id=host_id, active=active)
            models.IneligibleHostQueue.objects.create(job=job, host_id=host_id)
        for label_id in metahosts:
            models.HostQueueEntry.objects.create(job=job, priority=priority,
                                                 meta_host_id=label_id,
                                                 active=active)
        return job


    def _create_job_simple(self, hosts, use_metahost=False,
                          priority=0, active=0):
        'An alternative interface to _create_job'
        args = {'hosts' : [], 'metahosts' : []}
        if use_metahost:
            args['metahosts'] = hosts
        else:
            args['hosts'] = hosts
        return self._create_job(priority=priority, active=active, **args)


    def _update_hqe(self, set, where=''):
        query = 'UPDATE host_queue_entries SET ' + set
        if where:
            query += ' WHERE ' + where
        self._do_query(query)


class DispatcherSchedulingTest(BaseDispatcherTest):
    _jobs_scheduled = []

    def _set_monitor_stubs(self):
        super(DispatcherSchedulingTest, self)._set_monitor_stubs()
        def run_stub(hqe_self, assigned_host=None):
            hqe_self.set_status('Starting')
            if hqe_self.meta_host:
                host = assigned_host
            else:
                host = hqe_self.host
            self._record_job_scheduled(hqe_self.job.id, host.id)
            return Dummy()
        monitor_db.HostQueueEntry.run = run_stub


    def _record_job_scheduled(self, job_id, host_id):
        record = (job_id, host_id)
        self.assert_(record not in self._jobs_scheduled,
                     'Job %d scheduled on host %d twice' %
                     (job_id, host_id))
        self._jobs_scheduled.append(record)


    def _assert_job_scheduled_on(self, job_id, host_id):
        record = (job_id, host_id)
        self.assert_(record in self._jobs_scheduled,
                     'Job %d not scheduled on host %d as expected\n'
                     'Jobs scheduled: %s' %
                     (job_id, host_id, self._jobs_scheduled))
        self._jobs_scheduled.remove(record)


    def _check_for_extra_schedulings(self):
        if len(self._jobs_scheduled) != 0:
            self.fail('Extra jobs scheduled: ' +
                      str(self._jobs_scheduled))


    def _convert_jobs_to_metahosts(self, *job_ids):
        sql_tuple = '(' + ','.join(str(i) for i in job_ids) + ')'
        self._do_query('UPDATE host_queue_entries SET '
                       'meta_host=host_id, host_id=NULL '
                       'WHERE job_id IN ' + sql_tuple)


    def _lock_host(self, host_id):
        self._do_query('UPDATE hosts SET locked=1 WHERE id=' +
                       str(host_id))


    def setUp(self):
        super(DispatcherSchedulingTest, self).setUp()
        self._jobs_scheduled = []


    def _test_basic_scheduling_helper(self, use_metahosts):
        'Basic nonmetahost scheduling'
        self._create_job_simple([1], use_metahosts)
        self._create_job_simple([2], use_metahosts)
        self._dispatcher._schedule_new_jobs()
        self._assert_job_scheduled_on(1, 1)
        self._assert_job_scheduled_on(2, 2)
        self._check_for_extra_schedulings()


    def _test_priorities_helper(self, use_metahosts):
        'Test prioritization ordering'
        self._create_job_simple([1], use_metahosts)
        self._create_job_simple([2], use_metahosts)
        self._create_job_simple([1,2], use_metahosts)
        self._create_job_simple([1], use_metahosts, priority=1)
        self._dispatcher._schedule_new_jobs()
        self._assert_job_scheduled_on(4, 1) # higher priority
        self._assert_job_scheduled_on(2, 2) # earlier job over later
        self._check_for_extra_schedulings()


    def _test_hosts_ready_helper(self, use_metahosts):
        """
        Only hosts that are status=Ready, unlocked and not invalid get
        scheduled.
        """
        self._create_job_simple([1], use_metahosts)
        self._do_query('UPDATE hosts SET status="Running" WHERE id=1')
        self._dispatcher._schedule_new_jobs()
        self._check_for_extra_schedulings()

        self._do_query('UPDATE hosts SET status="Ready", locked=1 '
                       'WHERE id=1')
        self._dispatcher._schedule_new_jobs()
        self._check_for_extra_schedulings()

        self._do_query('UPDATE hosts SET locked=0, invalid=1 '
                       'WHERE id=1')
        self._dispatcher._schedule_new_jobs()
        if not use_metahosts:
            self._assert_job_scheduled_on(1, 1)
        self._check_for_extra_schedulings()


    def _test_hosts_idle_helper(self, use_metahosts):
        'Only idle hosts get scheduled'
        self._create_job(hosts=[1], active=1)
        self._create_job_simple([1], use_metahosts)
        self._dispatcher._schedule_new_jobs()
        self._check_for_extra_schedulings()


    def _test_obey_ACLs_helper(self, use_metahosts):
        self._do_query('DELETE FROM acl_groups_hosts WHERE host_id=1')
        self._create_job_simple([1], use_metahosts)
        self._dispatcher._schedule_new_jobs()
        self._check_for_extra_schedulings()


    def _test_only_if_needed_labels_helper(self, use_metahosts):
        # apply only_if_needed label3 to host1
        label3 = models.Label.smart_get('label3')
        models.Host.smart_get('host1').labels.add(label3)

        job = self._create_job_simple([1], use_metahosts)
        # if the job doesn't depend on label3, there should be no scheduling
        self._dispatcher._schedule_new_jobs()
        self._check_for_extra_schedulings()

        # now make the job depend on label3
        job.dependency_labels.add(label3)
        self._dispatcher._schedule_new_jobs()
        self._assert_job_scheduled_on(1, 1)
        self._check_for_extra_schedulings()

        if use_metahosts:
            # should also work if the metahost is the only_if_needed label
            self._do_query('DELETE FROM jobs_dependency_labels')
            self._create_job(metahosts=[3])
            self._dispatcher._schedule_new_jobs()
            self._assert_job_scheduled_on(2, 1)
            self._check_for_extra_schedulings()


    def test_basic_scheduling(self):
        self._test_basic_scheduling_helper(False)


    def test_priorities(self):
        self._test_priorities_helper(False)


    def test_hosts_ready(self):
        self._test_hosts_ready_helper(False)


    def test_hosts_idle(self):
        self._test_hosts_idle_helper(False)


    def test_obey_ACLs(self):
        self._test_obey_ACLs_helper(False)


    def test_only_if_needed_labels(self):
        self._test_only_if_needed_labels_helper(False)


    def test_non_metahost_on_invalid_host(self):
        """
        Non-metahost entries can get scheduled on invalid hosts (this is how
        one-time hosts work).
        """
        self._do_query('UPDATE hosts SET invalid=1')
        self._test_basic_scheduling_helper(False)


    def test_metahost_scheduling(self):
        """
        Basic metahost scheduling
        """
        self._test_basic_scheduling_helper(True)


    def test_metahost_priorities(self):
        self._test_priorities_helper(True)


    def test_metahost_hosts_ready(self):
        self._test_hosts_ready_helper(True)


    def test_metahost_hosts_idle(self):
        self._test_hosts_idle_helper(True)


    def test_metahost_obey_ACLs(self):
        self._test_obey_ACLs_helper(True)


    def test_metahost_only_if_needed_labels(self):
        self._test_only_if_needed_labels_helper(True)


    def test_nonmetahost_over_metahost(self):
        """
        Non-metahost entries should take priority over metahost entries
        for the same host
        """
        self._create_job(metahosts=[1])
        self._create_job(hosts=[1])
        self._dispatcher._schedule_new_jobs()
        self._assert_job_scheduled_on(2, 1)
        self._check_for_extra_schedulings()


    def test_metahosts_obey_blocks(self):
        """
        Metahosts can't get scheduled on hosts already scheduled for
        that job.
        """
        self._create_job(metahosts=[1], hosts=[1])
        # make the nonmetahost entry complete, so the metahost can try
        # to get scheduled
        self._update_hqe(set='complete = 1', where='host_id=1')
        self._dispatcher._schedule_new_jobs()
        self._check_for_extra_schedulings()


    def test_only_schedule_queued_entries(self):
        self._create_job(metahosts=[1])
        self._update_hqe(set='active=1, host_id=2')
        self._dispatcher._schedule_new_jobs()
        self._check_for_extra_schedulings()


class DispatcherThrottlingTest(BaseDispatcherTest):
    """
    Test that the dispatcher throttles:
     * total number of running processes
     * number of processes started per cycle
    """
    _MAX_RUNNING = 3
    _MAX_STARTED = 2

    def setUp(self):
        super(DispatcherThrottlingTest, self).setUp()
        self._dispatcher.max_running_processes = self._MAX_RUNNING
        self._dispatcher.max_processes_started_per_cycle = self._MAX_STARTED


    class DummyAgent(object):
        _is_running = False
        _is_done = False
        num_processes = 1

        def is_running(self):
            return self._is_running


        def tick(self):
            self._is_running = True


        def is_done(self):
            return self._is_done


        def set_done(self, done):
            self._is_done = done
            self._is_running = not done


    def _setup_some_agents(self, num_agents):
        self._agents = [self.DummyAgent() for i in xrange(num_agents)]
        self._dispatcher._agents = list(self._agents)


    def _run_a_few_cycles(self):
        for i in xrange(4):
            self._dispatcher._handle_agents()


    def _assert_agents_started(self, indexes, is_started=True):
        for i in indexes:
            self.assert_(self._agents[i].is_running() == is_started,
                         'Agent %d %sstarted' %
                         (i, is_started and 'not ' or ''))


    def _assert_agents_not_started(self, indexes):
        self._assert_agents_started(indexes, False)


    def test_throttle_total(self):
        self._setup_some_agents(4)
        self._run_a_few_cycles()
        self._assert_agents_started([0, 1, 2])
        self._assert_agents_not_started([3])


    def test_throttle_per_cycle(self):
        self._setup_some_agents(3)
        self._dispatcher._handle_agents()
        self._assert_agents_started([0, 1])
        self._assert_agents_not_started([2])


    def test_throttle_with_synchronous(self):
        self._setup_some_agents(2)
        self._agents[0].num_processes = 3
        self._run_a_few_cycles()
        self._assert_agents_started([0])
        self._assert_agents_not_started([1])


    def test_large_agent_starvation(self):
        """
        Ensure large agents don't get starved by lower-priority agents.
        """
        self._setup_some_agents(3)
        self._agents[1].num_processes = 3
        self._run_a_few_cycles()
        self._assert_agents_started([0])
        self._assert_agents_not_started([1, 2])

        self._agents[0].set_done(True)
        self._run_a_few_cycles()
        self._assert_agents_started([1])
        self._assert_agents_not_started([2])


    def test_zero_process_agent(self):
        self._setup_some_agents(5)
        self._agents[4].num_processes = 0
        self._run_a_few_cycles()
        self._assert_agents_started([0, 1, 2, 4])
        self._assert_agents_not_started([3])


class AbortTest(BaseDispatcherTest):
    """
    Test both the dispatcher abort functionality and AbortTask.
    """
    def setUp(self):
        super(AbortTest, self).setUp()
        self.god.stub_class(monitor_db, 'RebootTask')
        self.god.stub_class(monitor_db, 'VerifyTask')
        self.god.stub_class(monitor_db, 'AbortTask')
        self.god.stub_class(monitor_db, 'HostQueueEntry')
        self.god.stub_class(monitor_db, 'Agent')


    def _setup_queue_entries(self, host_id, hqe_id):
        host = monitor_db.Host(id=host_id)
        self.god.stub_function(host, 'set_status')
        hqe = monitor_db.HostQueueEntry.expect_new(row=IsRow(hqe_id))
        hqe.id = hqe_id
        return host, hqe


    def _setup_abort_expects(self, host, hqe, abort_agent=None):
        hqe.get_host.expect_call().and_return(host)
        reboot_task = monitor_db.RebootTask.expect_new(host)
        verify_task = monitor_db.VerifyTask.expect_new(host=host)
        if abort_agent:
            abort_task = monitor_db.AbortTask.expect_new(hqe, [abort_agent])
            tasks = [mock.is_instance_comparator(monitor_db.AbortTask)]
        else:
            hqe.set_status.expect_call('Aborted')
            host.set_status.expect_call('Rebooting')
            tasks = []
        tasks += [reboot_task, verify_task]
        agent = monitor_db.Agent.expect_new(tasks=tasks,
                                            queue_entry_ids=[hqe.id])
        agent.queue_entry_ids = [hqe.id]
        return agent


    def test_find_aborting_inactive(self):
        self._create_job(hosts=[1, 2])
        self._update_hqe(set='status="Abort"')

        host1, hqe1 = self._setup_queue_entries(1, 1)
        host2, hqe2 = self._setup_queue_entries(2, 2)
        agent1 = self._setup_abort_expects(host1, hqe1)
        agent2 = self._setup_abort_expects(host2, hqe2)

        self._dispatcher._find_aborting()

        self.assertEquals(self._dispatcher._agents, [agent1, agent2])
        self.god.check_playback()


    def test_find_aborting_active(self):
        self._create_job(hosts=[1, 2])
        self._update_hqe(set='status="Abort", active=1')
        # have to make an Agent for the active HQEs
        task = self.god.create_mock_class(monitor_db.QueueTask, 'QueueTask')
        agent = self.god.create_mock_class(monitor_db.Agent, 'OldAgent')
        agent.queue_entry_ids = [1, 2]
        self._dispatcher.add_agent(agent)

        host1, hqe1 = self._setup_queue_entries(1, 1)
        host2, hqe2 = self._setup_queue_entries(2, 2)
        agent1 = self._setup_abort_expects(host1, hqe1, abort_agent=agent)
        agent2 = self._setup_abort_expects(host2, hqe2)

        self._dispatcher._find_aborting()

        self.assertEquals(self._dispatcher._agents, [agent1, agent2])
        self.god.check_playback()


class PidfileRunMonitorTest(unittest.TestCase):
    results_dir = '/test/path'
    pidfile_path = os.path.join(results_dir, monitor_db.AUTOSERV_PID_FILE)
    pid = 12345
    args = ('nice -n 10 autoserv -P 123-myuser/myhost -p -n '
            '-r ' + results_dir + ' -b -u myuser -l my-job-name '
            '-m myhost /tmp/filejx43Zi -c')
    bad_args = args.replace(results_dir, '/random/results/dir')

    def setUp(self):
        self.god = mock.mock_god()
        self.god.stub_function(monitor_db, 'open')
        self.god.stub_function(os.path, 'exists')
        self.god.stub_function(monitor_db.email_manager,
                               'enqueue_notify_email')
        self.monitor = monitor_db.PidfileRunMonitor(self.results_dir)


    def tearDown(self):
        self.god.unstub_all()


    def set_not_yet_run(self):
        os.path.exists.expect_call(self.pidfile_path).and_return(False)


    def setup_pidfile(self, pidfile_contents):
        os.path.exists.expect_call(self.pidfile_path).and_return(True)
        pidfile = StringIO.StringIO(pidfile_contents)
        monitor_db.open.expect_call(
            self.pidfile_path, 'r').and_return(pidfile)


    def set_running(self):
        self.setup_pidfile(str(self.pid) + '\n')


    def set_complete(self, error_code):
        self.setup_pidfile(str(self.pid) + '\n' +
                           str(error_code) + '\n')


    def _test_read_pidfile_helper(self, expected_pid, expected_exit_status):
        pid, exit_status = self.monitor.read_pidfile()
        self.assertEquals(pid, expected_pid)
        self.assertEquals(exit_status, expected_exit_status)
        self.god.check_playback()


    def test_read_pidfile(self):
        self.set_not_yet_run()
        self._test_read_pidfile_helper(None, None)

        self.set_running()
        self._test_read_pidfile_helper(self.pid, None)

        self.set_complete(123)
        self._test_read_pidfile_helper(self.pid, 123)


    def test_read_pidfile_error(self):
        self.setup_pidfile('asdf')
        self.assertRaises(monitor_db.PidfileException,
                          self.monitor.read_pidfile)
        self.god.check_playback()


    def setup_proc_cmdline(self, args):
        proc_cmdline = args.replace(' ', '\x00')
        proc_file = StringIO.StringIO(proc_cmdline)
        monitor_db.open.expect_call(
            '/proc/%d/cmdline' % self.pid, 'r').and_return(proc_file)


    def setup_find_autoservs(self, process_dict):
        self.god.stub_class_method(monitor_db.Dispatcher,
                                   'find_autoservs')
        monitor_db.Dispatcher.find_autoservs.expect_call().and_return(
            process_dict)


    def _test_get_pidfile_info_helper(self, expected_pid,
                                      expected_exit_status):
        pid, exit_status = self.monitor.get_pidfile_info()
        self.assertEquals(pid, expected_pid)
        self.assertEquals(exit_status, expected_exit_status)
        self.god.check_playback()


    def test_get_pidfile_info(self):
        'normal cases for get_pidfile_info'
        # running
        self.set_running()
        self.setup_proc_cmdline(self.args)
        self._test_get_pidfile_info_helper(self.pid, None)

        # exited during check
        self.set_running()
        monitor_db.open.expect_call(
            '/proc/%d/cmdline' % self.pid, 'r').and_raises(IOError)
        self.set_complete(123) # pidfile gets read again
        self._test_get_pidfile_info_helper(self.pid, 123)

        # completed
        self.set_complete(123)
        self._test_get_pidfile_info_helper(self.pid, 123)


    def test_get_pidfile_info_running_no_proc(self):
        'pidfile shows process running, but no proc exists'
        # running but no proc
        self.set_running()
        monitor_db.open.expect_call(
            '/proc/%d/cmdline' % self.pid, 'r').and_raises(IOError)
        self.set_running()
        monitor_db.email_manager.enqueue_notify_email.expect_call(
            mock.is_string_comparator(), mock.is_string_comparator())
        self._test_get_pidfile_info_helper(self.pid, 1)
        self.assertTrue(self.monitor.lost_process)


    def test_get_pidfile_info_not_yet_run(self):
        "pidfile hasn't been written yet"
        # process not running
        self.set_not_yet_run()
        self.setup_find_autoservs({})
        self._test_get_pidfile_info_helper(None, None)

        # process running
        self.set_not_yet_run()
        self.setup_find_autoservs({self.pid : self.args})
        self._test_get_pidfile_info_helper(None, None)

        # another process running under same pid
        self.set_not_yet_run()
        self.setup_find_autoservs({self.pid : self.bad_args})
        self._test_get_pidfile_info_helper(None, None)


class AgentTest(unittest.TestCase):
    def setUp(self):
        self.god = mock.mock_god()


    def tearDown(self):
        self.god.unstub_all()


    def test_agent(self):
        task1 = self.god.create_mock_class(monitor_db.AgentTask,
                                          'task1')
        task2 = self.god.create_mock_class(monitor_db.AgentTask,
                                          'task2')
        task3 = self.god.create_mock_class(monitor_db.AgentTask,
                                           'task3')

        task1.start.expect_call()
        task1.is_done.expect_call().and_return(False)
        task1.poll.expect_call()
        task1.is_done.expect_call().and_return(True)
        task1.is_done.expect_call().and_return(True)
        task1.success = True

        task2.start.expect_call()
        task2.is_done.expect_call().and_return(True)
        task2.is_done.expect_call().and_return(True)
        task2.success = False
        task2.failure_tasks = [task3]

        task3.start.expect_call()
        task3.is_done.expect_call().and_return(True)
        task3.is_done.expect_call().and_return(True)
        task3.success = True

        agent = monitor_db.Agent([task1, task2])
        agent.dispatcher = object()
        agent.start()
        while not agent.is_done():
            agent.tick()
        self.god.check_playback()


class AgentTasksTest(unittest.TestCase):
    TEMP_DIR = '/temp/dir'
    HOSTNAME = 'myhost'
    HOST_PROTECTION = host_protections.default

    def setUp(self):
        self.god = mock.mock_god()
        self.god.stub_with(tempfile, 'mkdtemp',
                           mock.mock_function('mkdtemp', self.TEMP_DIR))
        self.god.stub_class_method(monitor_db.RunMonitor, 'run')
        self.god.stub_class_method(monitor_db.RunMonitor, 'exit_code')
        self.host = self.god.create_mock_class(monitor_db.Host, 'host')
        self.host.hostname = self.HOSTNAME
        self.host.protection = self.HOST_PROTECTION
        self.queue_entry = self.god.create_mock_class(
            monitor_db.HostQueueEntry, 'queue_entry')
        self.queue_entry.host = self.host
        self.queue_entry.meta_host = None


    def tearDown(self):
        self.god.unstub_all()


    def run_task(self, task, success):
        """
        Do essentially what an Agent would do, but protect againt
        infinite looping from test errors.
        """
        if not getattr(task, 'agent', None):
            task.agent = object()
        task.start()
        count = 0
        while not task.is_done():
            count += 1
            if count > 10:
                print 'Task failed to finish'
                # in case the playback has clues to why it
                # failed
                self.god.check_playback()
                self.fail()
            task.poll()
        self.assertEquals(task.success, success)


    def setup_run_monitor(self, exit_status):
        monitor_db.RunMonitor.run.expect_call()
        monitor_db.RunMonitor.exit_code.expect_call()
        monitor_db.RunMonitor.exit_code.expect_call().and_return(
            exit_status)


    def _test_repair_task_helper(self, success):
        self.host.set_status.expect_call('Repairing')
        if success:
            self.setup_run_monitor(0)
            self.host.set_status.expect_call('Ready')
        else:
            self.setup_run_monitor(1)
            self.host.set_status.expect_call('Repair Failed')

        task = monitor_db.RepairTask(self.host)
        self.assertEquals(task.failure_tasks, [])
        self.run_task(task, success)

        expected_protection = host_protections.Protection.get_string(
            host_protections.default)
        expected_protection = host_protections.Protection.get_attr_name(
            expected_protection)

        self.assertTrue(set(task.monitor.cmd) >=
                        set(['autoserv', '-R', '-m', self.HOSTNAME, '-r',
                             self.TEMP_DIR, '--host-protection',
                             expected_protection]))
        self.god.check_playback()


    def test_repair_task(self):
        self._test_repair_task_helper(True)
        self._test_repair_task_helper(False)


    def test_repair_task_with_queue_entry(self):
        queue_entry = self.god.create_mock_class(
            monitor_db.HostQueueEntry, 'queue_entry')
        self.host.set_status.expect_call('Repairing')
        self.setup_run_monitor(1)
        self.host.set_status.expect_call('Repair Failed')
        queue_entry.handle_host_failure.expect_call()

        task = monitor_db.RepairTask(self.host, queue_entry)
        self.run_task(task, False)
        self.god.check_playback()


    def setup_verify_expects(self, success, use_queue_entry):
        if use_queue_entry:
            self.queue_entry.set_status.expect_call('Verifying')
            self.queue_entry.verify_results_dir.expect_call(
                ).and_return('/verify/results/dir')
            self.queue_entry.clear_results_dir.expect_call(
                '/verify/results/dir')
        self.host.set_status.expect_call('Verifying')
        if success:
            self.setup_run_monitor(0)
            self.host.set_status.expect_call('Ready')
        else:
            self.setup_run_monitor(1)
            if use_queue_entry:
                self.queue_entry.requeue.expect_call()


    def _check_verify_failure_tasks(self, verify_task):
        self.assertEquals(len(verify_task.failure_tasks), 1)
        repair_task = verify_task.failure_tasks[0]
        self.assert_(isinstance(repair_task, monitor_db.RepairTask))
        self.assertEquals(verify_task.host, repair_task.host)
        if verify_task.queue_entry and not verify_task.queue_entry.meta_host:
            self.assertEquals(repair_task.fail_queue_entry,
                              verify_task.queue_entry)
        else:
            self.assertEquals(repair_task.fail_queue_entry, None)


    def _test_verify_task_helper(self, success, use_queue_entry=False,
                                 use_meta_host=False):
        self.setup_verify_expects(success, use_queue_entry)

        if use_queue_entry:
            task = monitor_db.VerifyTask(
                queue_entry=self.queue_entry)
        else:
            task = monitor_db.VerifyTask(host=self.host)
        self._check_verify_failure_tasks(task)
        self.run_task(task, success)
        self.assertTrue(set(task.monitor.cmd) >=
                        set(['autoserv', '-v', '-m', self.HOSTNAME, '-r',
                        self.TEMP_DIR]))
        self.god.check_playback()


    def test_verify_task_with_host(self):
        self._test_verify_task_helper(True)
        self._test_verify_task_helper(False)


    def test_verify_task_with_queue_entry(self):
        self._test_verify_task_helper(True, use_queue_entry=True)
        self._test_verify_task_helper(False, use_queue_entry=True)


    def test_verify_task_with_metahost(self):
        self._test_verify_task_helper(True, use_queue_entry=True,
                                      use_meta_host=True)
        self._test_verify_task_helper(False, use_queue_entry=True,
                                      use_meta_host=True)


    def test_verify_synchronous_task(self):
        job = self.god.create_mock_class(monitor_db.Job, 'job')

        self.setup_verify_expects(True, True)
        job.num_complete.expect_call().and_return(0)
        self.queue_entry.set_status.expect_call('Pending')
        job.is_ready.expect_call().and_return(True)
        job.run.expect_call(self.queue_entry)
        self.queue_entry.job = job

        task = monitor_db.VerifySynchronousTask(self.queue_entry)
        task.agent = Dummy()
        task.agent.dispatcher = Dummy()
        self.god.stub_with(task.agent.dispatcher, 'add_agent',
                           mock.mock_function('add_agent'))
        self.run_task(task, True)
        self.god.check_playback()


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