def test_bot_update_pubsub_error(self):
    data = _gen_request(
        properties=dict(dimensions={u'OS': u'Windows-3.1.1'}),
        pubsub_topic='projects/abc/topics/def')
    request = task_request.make_request(data, True)
    task_scheduler.schedule_request(request)
    bot_dimensions = {
      u'OS': [u'Windows', u'Windows-3.1.1'],
      u'hostname': u'localhost',
      u'foo': u'bar',
    }
    _, run_result = task_scheduler.bot_reap_task(
        bot_dimensions, 'localhost', 'abc')
    self.assertEqual('localhost', run_result.bot_id)

    # Attempt to terminate the task with success, but make PubSub call fail.
    self.mock_pub_sub(publish_successful=False)
    self.assertEqual(
        (False, False),
        task_scheduler.bot_update_task(
            run_result.key, 'localhost', 'Foo1', 0, 0, 0.1, False, False,
            0.1, None))

    # Bot retries bot_update, now PubSub works and notification is sent.
    pub_sub_calls = self.mock_pub_sub(publish_successful=True)
    self.assertEqual(
        (True, True),
        task_scheduler.bot_update_task(
            run_result.key, 'localhost', 'Foo1', 0, 0, 0.1, False, False,
            0.1, None))
    self.assertEqual(1, len(pub_sub_calls)) # notification is sent

  def test_bot_kill_task(self):
    self.mock(random, 'getrandbits', lambda _: 0x88)
    dimensions = {u'OS': u'Windows-3.1.1'}
    request = task_request.make_request(
        _gen_request(properties={'dimensions': dimensions}), True)
    result_summary = task_scheduler.schedule_request(request)
    reaped_request, run_result = task_scheduler.bot_reap_task(
        {'OS': 'Windows-3.1.1'}, 'localhost', 'abc')

    self.assertEqual(
        None, task_scheduler.bot_kill_task(run_result.key, 'localhost'))
    expected = {
      'abandoned_ts': self.now,
      'bot_dimensions': dimensions,
      'bot_id': u'localhost',
      'bot_version': u'abc',
      'children_task_ids': [],
      'completed_ts': None,
      'costs_usd': [0.],
      'cost_saved_usd': None,
      'created_ts': self.now,
      'deduped_from': None,
      'durations': [],
      'exit_codes': [],
      'failure': False,
      'id': '1d69b9f088008810',
      'internal_failure': True,
      'modified_ts': self.now,
      'name': u'Request name',
      'outputs_ref': None,
      'properties_hash': None,
      'server_versions': [u'v1a'],
      'started_ts': self.now,
      'state': State.BOT_DIED,
      'tags': [u'OS:Windows-3.1.1', u'priority:50', u'tag:1', u'user:Jesus'],
      'try_number': 1,
      'user': u'Jesus',
    }
    self.assertEqual(expected, result_summary.key.get().to_dict())
    expected = {
      'abandoned_ts': self.now,
      'bot_dimensions': dimensions,
      'bot_id': u'localhost',
      'bot_version': u'abc',
      'children_task_ids': [],
      'completed_ts': None,
      'cost_usd': 0.,
      'durations': [],
      'exit_codes': [],
      'failure': False,
      'id': '1d69b9f088008811',
      'internal_failure': True,
      'modified_ts': self.now,
      'outputs_ref': None,
      'server_versions': [u'v1a'],
      'started_ts': self.now,
      'state': State.BOT_DIED,
      'try_number': 1,
    }
    self.assertEqual(expected, run_result.key.get().to_dict())

 def test_cron_abort_expired_task_to_run(self):
   self.mock(random, 'getrandbits', lambda _: 0x88)
   data = _gen_request_data(
       properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
   request = task_request.make_request(data)
   result_summary = task_scheduler.schedule_request(request)
   abandoned_ts = self.mock_now(self.now, data['scheduling_expiration_secs']+1)
   self.assertEqual(1, task_scheduler.cron_abort_expired_task_to_run())
   self.assertEqual([], task_result.TaskRunResult.query().fetch())
   expected = {
     'abandoned_ts': abandoned_ts,
     'bot_id': None,
     'bot_version': None,
     'children_task_ids': [],
     'completed_ts': None,
     'costs_usd': [],
     'cost_saved_usd': None,
     'created_ts': self.now,
     'deduped_from': None,
     'durations': [],
     'exit_codes': [],
     'failure': False,
     'id': '1d69b9f088008810',
     'internal_failure': False,
     'modified_ts': abandoned_ts,
     'name': u'Request name',
     'properties_hash': None,
     'server_versions': [],
     'started_ts': None,
     'state': task_result.State.EXPIRED,
     'try_number': None,
     'user': u'Jesus',
   }
   self.assertEqual(expected, result_summary.key.get().to_dict())

  def new(self, request):
    """Creates a new task.

    The task will be enqueued in the tasks list and will be executed at the
    earliest opportunity by a bot that has at least the dimensions as described
    in the task request.
    """
    logging.info('%s', request)
    try:
      request = message_conversion.new_task_request_from_rpc(
          request, utils.utcnow())
      posted_request = task_request.make_request(request, acl.is_bot_or_admin())
    except (datastore_errors.BadValueError, TypeError, ValueError) as e:
      raise endpoints.BadRequestException(e.message)

    result_summary = task_scheduler.schedule_request(posted_request)

    previous_result = None
    if result_summary.deduped_from:
      previous_result = message_conversion.task_result_to_rpc(result_summary)

    return swarming_rpcs.TaskRequestMetadata(
        request=message_conversion.task_request_to_rpc(posted_request),
        task_id=task_pack.pack_result_summary_key(result_summary.key),
        task_result=previous_result)

  def test_task_parent_isolated(self):
    request = task_request.make_request(
        _gen_request(
            properties={
              'commands': None,
              'dimensions': {u'OS': u'Windows-3.1.1'},
              'inputs_ref': {
                'isolated': '1' * 40,
                'isolatedserver': 'http://localhost:1',
                'namespace': 'default-gzip',
              },
            }),
        True)
    _result_summary = task_scheduler.schedule_request(request)
    bot_dimensions = {
      u'OS': [u'Windows', u'Windows-3.1.1'],
      u'hostname': u'localhost',
      u'foo': u'bar',
    }
    actual_request, run_result = task_scheduler.bot_reap_task(
        bot_dimensions, 'localhost', 'abc')
    self.assertEqual(request, actual_request)
    self.assertEqual('localhost', run_result.bot_id)
    self.assertEqual(None, task_to_run.TaskToRun.query().get().queue_number)
    # It's important to terminate the task with success.
    self.assertEqual(
        (True, True),
        task_scheduler.bot_update_task(
            run_result.key, 'localhost', 'Foo1', 0, 0, 0.1, False, False,
            0.1, None))

    parent_id = run_result.task_id
    request = task_request.make_request(
        _gen_request(
            parent_task_id=parent_id,
            properties={'dimensions':{u'OS': u'Windows-3.1.1'}}),
        True)
    result_summary = task_scheduler.schedule_request(request)
    self.assertEqual([], result_summary.children_task_ids)
    self.assertEqual(parent_id, request.parent_task_id)

    parent_run_result_key = task_pack.unpack_run_result_key(parent_id)
    parent_res_summary_key = task_pack.run_result_key_to_result_summary_key(
        parent_run_result_key)
    expected = [result_summary.task_id]
    self.assertEqual(expected, parent_run_result_key.get().children_task_ids)
    self.assertEqual(expected, parent_res_summary_key.get().children_task_ids)

  def _bot_update_timeouts(self, hard, io):
    self.mock(random, 'getrandbits', lambda _: 0x88)
    data = _gen_request_data(
        properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
    request = task_request.make_request(data)
    result_summary = task_scheduler.schedule_request(request)
    reaped_request, run_result = task_scheduler.bot_reap_task(
        {'OS': 'Windows-3.1.1'}, 'localhost', 'abc')
    self.assertEqual(
        (True, True),
        task_scheduler.bot_update_task(
            run_result.key, 'localhost', 'hi', 0, 0, 0.1, hard, io, 0.1))
    expected = {
      'abandoned_ts': None,
      'bot_id': u'localhost',
      'bot_version': u'abc',
      'children_task_ids': [],
      'completed_ts': self.now,
      'costs_usd': [0.1],
      'cost_saved_usd': None,
      'created_ts': self.now,
      'deduped_from': None,
      'durations': [0.1],
      'exit_codes': [0],
      'failure': True,
      'id': '1d69b9f088008810',
      'internal_failure': False,
      'modified_ts': self.now,
      'name': u'Request name',
      'properties_hash': None,
      'server_versions': [u'v1a'],
      'started_ts': self.now,
      'state': State.TIMED_OUT,
      'tags': [u'OS:Windows-3.1.1', u'priority:50', u'tag:1', u'user:Jesus'],
      'try_number': 1,
      'user': u'Jesus',
    }
    self.assertEqual(expected, result_summary.key.get().to_dict())

    expected = {
      'abandoned_ts': None,
      'bot_id': u'localhost',
      'bot_version': u'abc',
      'children_task_ids': [],
      'completed_ts': self.now,
      'cost_usd': 0.1,
      'durations': [0.1],
      'exit_codes': [0],
      'failure': True,
      'id': '1d69b9f088008811',
      'internal_failure': False,
      'modified_ts': self.now,
      'server_versions': [u'v1a'],
      'started_ts': self.now,
      'state': State.TIMED_OUT,
      'try_number': 1,
    }
    self.assertEqual(expected, run_result.key.get().to_dict())

 def test_cron_handle_bot_died_second(self):
   # Test two tries internal_failure's leading to a BOT_DIED status.
   self.mock(random, 'getrandbits', lambda _: 0x88)
   now = utils.utcnow()
   data = _gen_request(
       properties=dict(dimensions={u'OS': u'Windows-3.1.1'}),
       created_ts=now,
       expiration_ts=now+datetime.timedelta(seconds=600))
   request = task_request.make_request(data, True)
   _result_summary = task_scheduler.schedule_request(request)
   bot_dimensions = {
     u'OS': [u'Windows', u'Windows-3.1.1'],
     u'hostname': u'localhost',
     u'foo': u'bar',
   }
   _request, run_result = task_scheduler.bot_reap_task(
       bot_dimensions, 'localhost', 'abc')
   self.assertEqual(1, run_result.try_number)
   self.assertEqual(task_result.State.RUNNING, run_result.state)
   self.mock_now(self.now + task_result.BOT_PING_TOLERANCE, 1)
   self.assertEqual(([], 1, 0), task_scheduler.cron_handle_bot_died('f.local'))
   now_1 = self.mock_now(self.now + task_result.BOT_PING_TOLERANCE, 2)
   # It must be a different bot.
   _request, run_result = task_scheduler.bot_reap_task(
       bot_dimensions, 'localhost-second', 'abc')
   now_2 = self.mock_now(self.now + 2 * task_result.BOT_PING_TOLERANCE, 3)
   self.assertEqual(
       (['1d69b9f088008812'], 0, 0),
       task_scheduler.cron_handle_bot_died('f.local'))
   self.assertEqual(([], 0, 0), task_scheduler.cron_handle_bot_died('f.local'))
   expected = {
     'abandoned_ts': now_2,
     'bot_dimensions': bot_dimensions,
     'bot_id': u'localhost-second',
     'bot_version': u'abc',
     'children_task_ids': [],
     'completed_ts': None,
     'costs_usd': [0., 0.],
     'cost_saved_usd': None,
     'created_ts': self.now,
     'deduped_from': None,
     'durations': [],
     'exit_codes': [],
     'failure': False,
     'id': '1d69b9f088008810',
     'internal_failure': True,
     'modified_ts': now_2,
     'name': u'Request name',
     'outputs_ref': None,
     'properties_hash': None,
     'server_versions': [u'v1a'],
     'started_ts': now_1,
     'state': task_result.State.BOT_DIED,
     'tags': [u'OS:Windows-3.1.1', u'priority:50', u'tag:1', u'user:Jesus'],
     'try_number': 2,
     'user': u'Jesus',
   }
   self.assertEqual(expected, run_result.result_summary_key.get().to_dict())

  def test_search_by_name_broken_tasks(self):
    # Create tasks where task_scheduler.schedule_request() fails in the middle.
    # This is done by mocking the functions to fail every SKIP call and running
    # it in a loop.
    class RandomFailure(Exception):
      pass

    # First call fails ndb.put_multi(), second call fails search.Index.put(),
    # third call work.
    index = [0]
    SKIP = 3
    def put_multi(*args, **kwargs):
      callers = [i[3] for i in inspect.stack()]
      self.assertTrue(
          'make_request' in callers or 'schedule_request' in callers, callers)
      if (index[0] % SKIP) == 1:
        raise RandomFailure()
      return old_put_multi(*args, **kwargs)

    def put_async(*args, **kwargs):
      callers = [i[3] for i in inspect.stack()]
      self.assertIn('schedule_request', callers)
      out = ndb.Future()
      if (index[0] % SKIP) == 2:
        out.set_exception(search.Error())
      else:
        out.set_result(old_put_async(*args, **kwargs).get_result())
      return out

    old_put_multi = self.mock(ndb, 'put_multi', put_multi)
    old_put_async = self.mock(search.Index, 'put_async', put_async)

    saved = []

    for i in xrange(100):
      index[0] = i
      data = _gen_request(
          name='Request %d' % i,
          properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
      try:
        request = task_request.make_request(data, True)
        result_summary = task_scheduler.schedule_request(request)
        saved.append(result_summary)
      except RandomFailure:
        pass

    self.assertEqual(67, len(saved))
    self.assertEqual(67, task_request.TaskRequest.query().count())
    self.assertEqual(67, task_result.TaskResultSummary.query().count())

    # Now the DB is full of half-corrupted entities.
    cursor = None
    actual, cursor = task_result._search_by_name('Request', cursor, 31)
    self.assertEqual(31, len(actual))
    actual, cursor = task_result._search_by_name('Request', cursor, 31)
    self.assertEqual(3, len(actual))
    actual, cursor = task_result._search_by_name('Request', cursor, 31)
    self.assertEqual(0, len(actual))

def _quick_reap():
  """Reaps a task."""
  data = _gen_request(
      properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
  request = task_request.make_request(data, True)
  _result_summary = task_scheduler.schedule_request(request)
  reaped_request, run_result = task_scheduler.bot_reap_task(
      {'OS': 'Windows-3.1.1'}, 'localhost', 'abc')
  return run_result

  def test_cron_abort_expired_task_to_run_retry(self):
    self.mock(random, 'getrandbits', lambda _: 0x88)
    now = utils.utcnow()
    data = _gen_request(
        properties=dict(dimensions={u'OS': u'Windows-3.1.1'}),
        created_ts=now,
        expiration_ts=now+datetime.timedelta(seconds=600))
    request = task_request.make_request(data, True)
    result_summary = task_scheduler.schedule_request(request)

    # Fake first try bot died.
    bot_dimensions = {
      u'OS': [u'Windows', u'Windows-3.1.1'],
      u'hostname': u'localhost',
      u'foo': u'bar',
    }
    _request, run_result = task_scheduler.bot_reap_task(
        bot_dimensions, 'localhost', 'abc')
    now_1 = self.mock_now(self.now + task_result.BOT_PING_TOLERANCE, 1)
    self.assertEqual((0, 1, 0), task_scheduler.cron_handle_bot_died())
    self.assertEqual(task_result.State.BOT_DIED, run_result.key.get().state)
    self.assertEqual(
        task_result.State.PENDING, run_result.result_summary_key.get().state)

    # BOT_DIED is kept instead of EXPIRED.
    abandoned_ts = self.mock_now(self.now, request.expiration_secs+1)
    self.assertEqual(1, task_scheduler.cron_abort_expired_task_to_run())
    self.assertEqual(1, len(task_result.TaskRunResult.query().fetch()))
    expected = {
      'abandoned_ts': abandoned_ts,
      'bot_dimensions': bot_dimensions,
      'bot_id': u'localhost',
      'bot_version': u'abc',
      'children_task_ids': [],
      'completed_ts': None,
      'costs_usd': [0.],
      'cost_saved_usd': None,
      'created_ts': self.now,
      'deduped_from': None,
      'durations': [],
      'exit_codes': [],
      'failure': False,
      'id': '1d69b9f088008810',
      'internal_failure': True,
      'modified_ts': abandoned_ts,
      'name': u'Request name',
      'outputs_ref': None,
      'properties_hash': None,
      'server_versions': [u'v1a'],
      'started_ts': self.now,
      'state': task_result.State.BOT_DIED,
      'tags': [u'OS:Windows-3.1.1', u'priority:50', u'tag:1', u'user:Jesus'],
      'try_number': 1,
      'user': u'Jesus',
    }
    self.assertEqual(expected, result_summary.key.get().to_dict())

 def test_cancel_task(self):
   data = _gen_request_data(
       properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
   request = task_request.make_request(data)
   result_summary = task_scheduler.schedule_request(request)
   ok, was_running = task_scheduler.cancel_task(result_summary.key)
   self.assertEqual(True, ok)
   self.assertEqual(False, was_running)
   result_summary = result_summary.key.get()
   self.assertEqual(task_result.State.CANCELED, result_summary.state)

  def test_search_by_name(self):
    data = _gen_request_data(
        properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
    request = task_request.make_request(data)
    result_summary = task_scheduler.schedule_request(request)

    # Assert that search is not case-sensitive by using unexpected casing.
    actual, _cursor = task_result.search_by_name('requEST', None, 10)
    self.assertEqual([result_summary], actual)
    actual, _cursor = task_result.search_by_name('name', None, 10)
    self.assertEqual([result_summary], actual)

  def test_search_by_name_failures(self):
    data = _gen_request(
        properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
    request = task_request.make_request(data, True)
    result_summary = task_scheduler.schedule_request(request)

    actual, _cursor = task_result._search_by_name('foo', None, 10)
    self.assertEqual([], actual)
    # Partial match doesn't work.
    actual, _cursor = task_result._search_by_name('nam', None, 10)
    self.assertEqual([], actual)

 def test_cancel_task_running(self):
   data = _gen_request_data(
       properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
   request = task_request.make_request(data)
   result_summary = task_scheduler.schedule_request(request)
   reaped_request, run_result = task_scheduler.bot_reap_task(
       {'OS': 'Windows-3.1.1'}, 'localhost', 'abc')
   ok, was_running = task_scheduler.cancel_task(result_summary.key)
   self.assertEqual(False, ok)
   self.assertEqual(True, was_running)
   result_summary = result_summary.key.get()
   self.assertEqual(task_result.State.RUNNING, result_summary.state)

  def post(self):
    logging.error('Unexpected old client')
    data = self.parse_body()
    msg = log_unexpected_subset_keys(
        self._EXPECTED_DATA_KEYS, self._REQUIRED_DATA_KEYS, data, self.request,
        'client', 'request keys')
    if msg:
      self.abort_with_error(400, error=msg)
    data_properties = data['properties']
    msg = log_unexpected_subset_keys(
        self._EXPECTED_PROPERTIES_KEYS, self._REQUIRED_PROPERTIES_KEYS,
        data_properties, self.request, 'client', 'request properties keys')
    if msg:
      self.abort_with_error(400, error=msg)

    # Class TaskProperties takes care of making everything deterministic.
    properties = task_request.TaskProperties(
        commands=data_properties['commands'],
        data=data_properties['data'],
        dimensions=data_properties['dimensions'],
        env=data_properties['env'],
        execution_timeout_secs=data_properties['execution_timeout_secs'],
        grace_period_secs=data_properties.get('grace_period_secs', 30),
        idempotent=data_properties.get('idempotent', False),
        io_timeout_secs=data_properties['io_timeout_secs'])

    now = utils.utcnow()
    expiration_ts = now + datetime.timedelta(
        seconds=data['scheduling_expiration_secs'])
    request = task_request.TaskRequest(
        created_ts=now,
        expiration_ts=expiration_ts,
        name=data['name'],
        parent_task_id=data.get('parent_task_id'),
        priority=data['priority'],
        properties=properties,
        tags=data['tags'],
        user=data['user'] or '')

    try:
      request = task_request.make_request(request, acl.is_bot_or_admin())
    except (
        AttributeError, datastore_errors.BadValueError, TypeError,
        ValueError) as e:
      self.abort_with_error(400, error=str(e))

    result_summary = task_scheduler.schedule_request(request)
    data = {
      'request': request.to_dict(),
      'task_id': task_pack.pack_result_summary_key(result_summary.key),
    }
    self.send_response(utils.to_json_encodable(data))

  def test_search_by_name(self):
    # This is awkward but it's because _search_by_name() depends on
    # functionality saved by task_scheduler. (There's a layering issue).
    data = _gen_request(
        properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
    request = task_request.make_request(data, True)
    result_summary = task_scheduler.schedule_request(request)

    # Assert that search is not case-sensitive by using unexpected casing.
    actual, _cursor = task_result._search_by_name('requEST', None, 10)
    self.assertEqual([result_summary], actual)
    actual, _cursor = task_result._search_by_name('name', None, 10)
    self.assertEqual([result_summary], actual)

 def test_cancel_task(self):
   data = _gen_request(
       properties=dict(dimensions={u'OS': u'Windows-3.1.1'}),
       pubsub_topic='projects/abc/topics/def')
   pub_sub_calls = self.mock_pub_sub()
   request = task_request.make_request(data, True)
   result_summary = task_scheduler.schedule_request(request)
   ok, was_running = task_scheduler.cancel_task(result_summary.key)
   self.assertEqual(True, ok)
   self.assertEqual(False, was_running)
   result_summary = result_summary.key.get()
   self.assertEqual(task_result.State.CANCELED, result_summary.state)
   self.assertEqual(1, len(pub_sub_calls)) # sent completion notification

 def test_bot_kill_task_wrong_bot(self):
   self.mock(random, 'getrandbits', lambda _: 0x88)
   data = _gen_request(
       properties=dict(dimensions={u'OS': u'Windows-3.1.1'}))
   request = task_request.make_request(data, True)
   result_summary = task_scheduler.schedule_request(request)
   reaped_request, run_result = task_scheduler.bot_reap_task(
       {'OS': 'Windows-3.1.1'}, 'localhost', 'abc')
   expected = (
     'Bot bot1 sent task kill for task 1d69b9f088008811 owned by bot '
     'localhost')
   self.assertEqual(
       expected, task_scheduler.bot_kill_task(run_result.key, 'bot1'))

 def _task_deduped(
     self, new_ts, deduped_from, task_id='1d8dc670a0008810', now=None):
   data = _gen_request(
       name='yay',
       user='Raoul',
       properties=dict(dimensions={u'OS': u'Windows-3.1.1'}, idempotent=True))
   request = task_request.make_request(data, True)
   _result_summary = task_scheduler.schedule_request(request)
   bot_dimensions = {
     u'OS': [u'Windows', u'Windows-3.1.1'],
     u'hostname': u'localhost',
     u'foo': u'bar',
   }
   self.assertEqual(None, task_to_run.TaskToRun.query().get().queue_number)
   actual_request_2, run_result_2 = task_scheduler.bot_reap_task(
       bot_dimensions, 'localhost', 'abc')
   self.assertEqual(None, actual_request_2)
   result_summary_duped, run_results_duped = get_results(request.key)
   expected = {
     'abandoned_ts': None,
     'bot_dimensions': bot_dimensions,
     'bot_id': u'localhost',
     'bot_version': u'abc',
     'children_task_ids': [],
     'completed_ts': now or self.now,
     'costs_usd': [],
     'cost_saved_usd': 0.1,
     'created_ts': new_ts,
     'deduped_from': deduped_from,
     'durations': [0.1],
     'exit_codes': [0],
     'failure': False,
     'id': task_id,
     'internal_failure': False,
     # Only this value is updated to 'now', the rest uses the previous run
     # timestamps.
     'modified_ts': new_ts,
     'name': u'yay',
     'outputs_ref': None,
     # A deduped task cannot be deduped against.
     'properties_hash': None,
     'server_versions': [u'v1a'],
     'started_ts': now or self.now,
     'state': State.COMPLETED,
     'tags': [u'OS:Windows-3.1.1', u'priority:50', u'tag:1', u'user:Raoul'],
     'try_number': 0,
     'user': u'Raoul',
   }
   self.assertEqual(expected, result_summary_duped.to_dict())
   self.assertEqual([], run_results_duped)

  def test_task_idempotent_old(self):
    self.mock(random, 'getrandbits', lambda _: 0x88)
    # First task is idempotent.
    self._task_ran_successfully()

    # Second task is scheduled, first task is too old to be reused.
    new_ts = self.mock_now(self.now, config.settings().reusable_task_age_secs)
    data = _gen_request(
        name='yay',
        user='Raoul',
        properties=dict(dimensions={u'OS': u'Windows-3.1.1'}, idempotent=True))
    request = task_request.make_request(data, True)
    _result_summary = task_scheduler.schedule_request(request)
    # The task was enqueued for execution.
    self.assertNotEqual(None, task_to_run.TaskToRun.query().get().queue_number)