#!/usr/bin/env python
# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# pylint: disable=protected-access

import logging
import sys
import unittest

from devil import devil_env

_sys_path_before = list(sys.path)
with devil_env.SysPath(devil_env.config.LocalPath('pymock')):
  _sys_path_with_pymock = list(sys.path)
  import mock # pylint: disable=import-error
_sys_path_after = list(sys.path)

class DevilEnvTest(unittest.TestCase):

  def testSysPath(self):
    self.assertEquals(_sys_path_before, _sys_path_after)
    self.assertEquals(
        _sys_path_before + [devil_env.config.LocalPath('pymock')],
        _sys_path_with_pymock)

  def testGetEnvironmentVariableConfig_configType(self):
    with mock.patch('os.environ.get',
                    mock.Mock(side_effect=lambda _env_var: None)):
      env_config = devil_env._GetEnvironmentVariableConfig()
    self.assertEquals('BaseConfig', env_config.get('config_type'))

  def testGetEnvironmentVariableConfig_noEnv(self):
    with mock.patch('os.environ.get',
                    mock.Mock(side_effect=lambda _env_var: None)):
      env_config = devil_env._GetEnvironmentVariableConfig()
    self.assertEquals({}, env_config.get('dependencies'))

  def testGetEnvironmentVariableConfig_adbPath(self):
    def mock_environment(env_var):
      return '/my/fake/adb/path' if env_var == 'ADB_PATH' else None

    with mock.patch('os.environ.get',
                    mock.Mock(side_effect=mock_environment)):
      env_config = devil_env._GetEnvironmentVariableConfig()
    self.assertEquals(
        {
          'adb': {
            'file_info': {
              'linux2_x86_64': {
                'local_paths': ['/my/fake/adb/path'],
              },
            },
          },
        },
        env_config.get('dependencies'))


if __name__ == '__main__':
  logging.getLogger().setLevel(logging.DEBUG)
  unittest.main(verbosity=2)