# -*- coding: utf-8 -*-
# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Unit tests for proc_metrics."""

# pylint: disable=protected-access

from __future__ import absolute_import
from __future__ import print_function

import sys

import mock
import psutil  # pylint: disable=import-error

from chromite.lib import cros_test_lib
from chromite.scripts.sysmon import proc_metrics


assert sys.version_info >= (3, 6), 'This module requires Python 3.6+'


def _mock_process(name, cmdline, parent=None):
  proc = mock.Mock(dir(psutil.Process))
  proc.name.return_value = name
  proc.cmdline.return_value = cmdline
  proc.cpu_percent.return_value = 2
  if parent is not None:
    proc.parent.return_value = parent
  return proc


def _mock_forked_process(name, cmdline):
  parent_proc = _mock_process(name, cmdline)
  return _mock_process(name, cmdline, parent=parent_proc)


def _expected_calls_for(name):
  """Return expected calls for a process metric."""
  return [
      mock.call('proc/count', (name,), None,
                1, enforce_ge=mock.ANY),
      mock.call('proc/cpu_percent', (name,), None,
                2, enforce_ge=mock.ANY),
  ]


class TestProcMetrics(cros_test_lib.TestCase):
  """Tests for proc_metrics."""

  def setUp(self):
    patcher = mock.patch('infra_libs.ts_mon.common.interface.state.store',
                         autospec=True)
    self.store = patcher.start()
    self.addCleanup(patcher.stop)

  def test_collect(self):
    with mock.patch('psutil.process_iter', autospec=True) as process_iter:
      process_iter.return_value = [
          _mock_process(
              name='autoserv',
              cmdline=['/usr/bin/python',
                       '-u', '/usr/local/autotest/server/autoserv',
                       '-p',
                       '-r', ('/usr/local/autotest/results/hosts/'
                              'chromeos4-row3-rack13-host9/646252-provision'
                              '/20171307125911'),
                       '-m', 'chromeos4-row3-rack13-host9',
                       '--verbose', '--lab', 'True',
                       '--provision', '--job-labels',
                       'cros-version:winky-release/R61-9741.0.0']
          ),
          _mock_process(
              name='apache2',
              cmdline=['/usr/sbin/apache2', '-k', 'start'],
          ),
          _mock_forked_process(
              name='autoserv',
              cmdline=['/usr/bin/python',
                       '-u', '/usr/local/autotest/server/autoserv',
                       '-p',
                       '-r', ('/usr/local/autotest/results/hosts/'
                              'chromeos4-row3-rack13-host9/646252-provision'
                              '/20171307125911'),
                       '-m', 'chromeos4-row3-rack13-host9',
                       '--verbose', '--lab', 'True',
                       '--provision', '--job-labels',
                       'cros-version:winky-release/R61-9741.0.0']
          ),
          _mock_process(
              name='gs_offloader',
              cmdline=['/usr/bin/python',
                       '/usr/local/autotest/site_utils/gs_offloader.py',
                       '-s', '--parallelism=30']
          ),
          _mock_process(
              name='python',
              cmdline=[('/usr/local/google/home/chromeos-test/.cache/cros_venv'
                        '/venv-2.7.6-5addca6cf590166d7b70e22a95bea4a0'
                        '/bin/python'),
                       '-m', 'chromite.scripts.sysmon', '--interval', '60']
          ),
          _mock_process(
              name='python',
              cmdline=[('/usr/local/google/home/chromeos-test/.cache/cros_venv'
                        '/venv-2.7.6-5addca6cf590166d7b70e22a95bea4a0'
                        '/bin/python'),
                       '-m', 'lucifer.cmd.job_aborter',
                       '--jobdir', '/usr/local/autotest/leases']
          ),
          _mock_process(
              name='python',
              cmdline=[('/usr/local/google/home/chromeos-test/.cache/cros_venv'
                        '/venv-2.7.6-5addca6cf590166d7b70e22a95bea4a0'
                        '/bin/python'),
                       '-m', 'lucifer.cmd.job_reporter',
                       '--run-job-path',
                       '/opt/infra-tools/usr/bin/lucifer_run_job',
                       '--jobdir', '/usr/local/autotest/leases',
                       '--job-id', '167263377',
                       '--autoserv-exit', '0',
                       '--',
                       '-resultsdir',
                       ('/usr/local/autotest/results/167263377-chromeos-test/'
                        'chromeos2-row11-rack6-host5'),
                       '-autotestdir', '/usr/local/autotest',
                       '-watcherpath',
                       '/opt/infra-tools/usr/bin/lucifer_watcher']
          ),
          _mock_process(
              name='lucifer',
              cmdline=['/opt/infra-tools/usr/bin/lucifer',
                       '-resultsdir',
                       ('/usr/local/autotest/results/167263377-chromeos-test/'
                        'chromeos2-row11-rack6-host5'),
                       '-autotestdir', '/usr/local/autotest',
                       '-watcherpath',
                       '/opt/infra-tools/usr/bin/lucifer_watcher']
          ),
          _mock_process(
              name='lxc-start',
              cmdline=['[lcx monitor] /usr/local/autotest/containers'
                       ' test_196499100_1525673902_240543]']
          ),
          _mock_process(
              name='lxc-attach',
              cmdline=['lxc-attach',
                       '-P',
                       '/usr/local/autotest/containers',
                       '-n',
                       'test_196499100_1525673902_240543',
                       '--',
                       'bash',
                       '-c',
                       ('/usr/local/autotest/server/autoserv'
                        ' -s -P 196499100-chromeos-test/group0 ...')]
          ),
          _mock_process(
              name='getty',
              cmdline=['/sbin/getty', '-8', '38400', 'console',]
          ),
      ]
      proc_metrics.collect_proc_info()

    setter = self.store.set
    calls = []
    calls.extend(_expected_calls_for('apache'))
    calls.extend(_expected_calls_for('autoserv'))
    calls.extend(_expected_calls_for('getty'))
    calls.extend(_expected_calls_for('gs_offloader'))
    calls.extend(_expected_calls_for('job_aborter'))
    calls.extend(_expected_calls_for('job_reporter'))
    calls.extend(_expected_calls_for('lucifer'))
    calls.extend(_expected_calls_for('lxc-start'))
    calls.extend(_expected_calls_for('lxc-attach'))
    calls.extend(_expected_calls_for('sysmon'))
    calls.extend(_expected_calls_for('other'))
    setter.assert_has_calls(calls)
    self.assertEqual(len(setter.mock_calls), len(calls))