device_target_test.py

#!/usr/bin/env vpython3

# Copyright 2021 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.

"""Tests scenarios with number of devices and invalid devices"""

import subprocess

import unittest

import unittest.mock as mock

from argparse import Namespace

from device_target import DeviceTarget

from target import Target

class TestDiscoverDeviceTarget(unittest.TestCase):

  def setUp(self):

    self.args = Namespace(out_dir='out/fuchsia',

                          target_cpu='x64',

                          host=None,

                          node_name=None,

                          port=None,

                          ssh_config=None,

                          fuchsia_out_dir=None,

                          os_check='update',

                          system_log_file=None)

  def testNoNodeNameOneDeviceReturnNoneCheckNameAndAddress(self):

    with (DeviceTarget.CreateFromArgs(self.args)) as device_target_instance:

      with mock.patch.object(DeviceTarget, 'RunFFXCommand') as mock_ffx:

        mock_spec_popen = mock.create_autospec(subprocess.Popen, instance=True)

        mock_spec_popen.communicate.return_value = ('address device_name', '')

        mock_spec_popen.returncode = 0

        mock_ffx.return_value = mock_spec_popen

        with mock.patch.object(Target,

                               '_WaitUntilReady') as mock_waituntilready:

          mock_waituntilready.return_value = True

          self.assertIsNone(device_target_instance.Start())

          self.assertEqual(device_target_instance._node_name, 'device_name')

          self.assertEqual(device_target_instance._host, 'address')

  def testNoNodeNameTwoDevicesRaiseExceptionAmbiguousTarget(self):

    with (DeviceTarget.CreateFromArgs(self.args)) as device_target_instance:

      with mock.patch.object(DeviceTarget, 'RunFFXCommand') as mock_ffx:

        mock_spec_popen = mock.create_autospec(subprocess.Popen, instance=True)

        mock_spec_popen.communicate.return_value = ('address1 device_name1\n'

                                                    'address2 device_name2', '')

        mock_spec_popen.returncode = 0

        mock_spec_popen.stdout = ''

        mock_ffx.return_value = mock_spec_popen

        with self.assertRaisesRegex(Exception,

                                    'Ambiguous target device specification.'):

          device_target_instance.Start()

          self.assertIsNone(device_target_instance._node_name)

          self.assertIsNone(device_target_instance._host)

  def testNoNodeNameDeviceDoesntHaveNameRaiseExceptionCouldNotFind(self):

    with (DeviceTarget.CreateFromArgs(self.args)) as device_target_instance:

      with mock.patch.object(DeviceTarget, 'RunFFXCommand') as mock_ffx:

        mock_spec_popen = mock.create_autospec(subprocess.Popen, instance=True)

        mock_spec_popen.communicate.return_value = ('address', '')

        mock_spec_popen.returncode = 0

        mock_ffx.return_value = mock_spec_popen

        with self.assertRaisesRegex(Exception, 'Could not find device'):

          device_target_instance.Start()

          self.assertIsNone(device_target_instance._node_name)

          self.assertIsNone(device_target_instance._host)

  def testNodeNameDefinedDeviceFoundReturnNoneCheckNameAndHost(self):

    self.args.node_name = 'device_name'

    with (DeviceTarget.CreateFromArgs(self.args)) as device_target_instance:

      with mock.patch('subprocess.Popen') as mock_popen:

        mock_popen.returncode = ('address', 'device_name')

        with mock.patch.object(Target,

                               '_WaitUntilReady') as mock_waituntilready:

          mock_waituntilready.return_value = True

          self.assertIsNone(device_target_instance.Start())

          self.assertEqual(device_target_instance._node_name, 'device_name')

          self.assertEqual(device_target_instance._host, 'address')

  def testNodeNameDefinedDeviceNotFoundRaiseExceptionCouldNotFind(self):

    self.args.node_name = 'wrong_device_name'

    with (DeviceTarget.CreateFromArgs(self.args)) as device_target_instance:

      with mock.patch('subprocess.Popen') as mock_popen:

        mock_popen.returncode = ('', '')

        with self.assertRaisesRegex(Exception, 'Could not find device'):

          device_target_instance.Start()

          self.assertIsNone(device_target_instance._node_name)

          self.assertIsNone(device_target_instance._host)

  def testNoDevicesFoundRaiseExceptionCouldNotFind(self):

    with (DeviceTarget.CreateFromArgs(self.args)) as device_target_instance:

      with mock.patch.object(DeviceTarget, 'RunFFXCommand') as mock_ffx:

        mock_spec_popen = mock.create_autospec(subprocess.Popen, instance=True)

        mock_spec_popen.communicate.return_value = ('', '')

        mock_spec_popen.returncode = 0

        mock_ffx.return_value = mock_spec_popen

        with self.assertRaisesRegex(Exception, 'Could not find device'):

          device_target_instance.Start()

          self.assertIsNone(device_target_instance._node_name)

          self.assertIsNone(device_target_instance._host)

if __name__ == '__main__':

  unittest.main()