#!/usr/bin/python
# Copyright (c) 2012 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.


import os
import sys
import time

sys.path.insert(0, os.path.join(os.path.dirname(os.path.realpath(__file__)),
                                '..', '..'))

from chromite.cros.commands import cros_chrome_sdk_unittest
from chromite.lib import chrome_util
from chromite.lib import cros_build_lib
from chromite.lib import cros_test_lib
from chromite.lib import osutils
from chromite.lib import partial_mock
from chromite.lib import remote_access_unittest
from chromite.scripts import deploy_chrome


# TODO(build): Finish test wrapper (http://crosbug.com/37517).
# Until then, this has to be after the chromite imports.
import mock


# pylint: disable=W0212

_REGULAR_TO = ('--to', 'monkey')
_GS_PATH = 'gs://foon'


def _ParseCommandLine(argv):
  return deploy_chrome._ParseCommandLine(['--log-level', 'debug'] + argv)


class InterfaceTest(cros_test_lib.OutputTestCase):
  """Tests the commandline interface of the script."""

  BOARD = 'lumpy'

  def testGsLocalPathUnSpecified(self):
    """Test no chrome path specified."""
    with self.OutputCapturer():
      self.assertRaises2(SystemExit, _ParseCommandLine, list(_REGULAR_TO),
                         check_attrs={'code': 2})

  def testGsPathSpecified(self):
    """Test case of GS path specified."""
    argv = list(_REGULAR_TO) + ['--gs-path', _GS_PATH]
    _ParseCommandLine(argv)

  def testLocalPathSpecified(self):
    """Test case of local path specified."""
    argv =  list(_REGULAR_TO) + ['--local-pkg-path', '/path/to/chrome']
    _ParseCommandLine(argv)

  def testNoTarget(self):
    """Test no target specified."""
    argv = ['--gs-path', _GS_PATH]
    self.assertParseError(argv)

  def assertParseError(self, argv):
    with self.OutputCapturer():
      self.assertRaises2(SystemExit, _ParseCommandLine, argv,
                         check_attrs={'code': 2})

  def testStagingFlagsNoStrict(self):
    """Errors out when --staging-flags is set without --strict."""
    argv = ['--staging-only', '--build-dir=/path/to/nowhere',
            '--board=%s' % self.BOARD, '--staging-flags=highdpi']
    self.assertParseError(argv)

  def testStrictNoBuildDir(self):
    """Errors out when --strict is set without --build-dir."""
    argv = ['--staging-only', '--strict', '--gs-path', _GS_PATH]
    self.assertParseError(argv)

  def testNoBoardBuildDir(self):
    argv = ['--staging-only', '--build-dir=/path/to/nowhere']
    self.assertParseError(argv)


class DeployChromeMock(partial_mock.PartialMock):

  TARGET = 'chromite.scripts.deploy_chrome.DeployChrome'
  ATTRS = ('_KillProcsIfNeeded', '_DisableRootfsVerification')

  def __init__(self):
    partial_mock.PartialMock.__init__(self)
    # Target starts off as having rootfs verification enabled.
    self.rsh_mock = remote_access_unittest.RemoteShMock()
    self.rsh_mock.SetDefaultCmdResult(0)
    self.MockMountCmd(1)
    self.rsh_mock.AddCmdResult(
        deploy_chrome.LSOF_COMMAND % (deploy_chrome._CHROME_DIR,), 1)

  def MockMountCmd(self, returnvalue):
    self.rsh_mock.AddCmdResult(deploy_chrome.MOUNT_RW_COMMAND,
                               returnvalue)

  def _DisableRootfsVerification(self, inst):
    with mock.patch.object(time, 'sleep'):
      self.backup['_DisableRootfsVerification'](inst)

  def PreStart(self):
    self.rsh_mock.start()

  def PreStop(self):
    self.rsh_mock.stop()

  def _KillProcsIfNeeded(self, _inst):
    # Fully stub out for now.
    pass


class DeployTest(cros_test_lib.MockTempDirTestCase):
  def _GetDeployChrome(self, args):
    options, _ = _ParseCommandLine(args)
    return deploy_chrome.DeployChrome(
        options, self.tempdir, os.path.join(self.tempdir, 'staging'))

  def setUp(self):
    self.deploy_mock = self.StartPatcher(DeployChromeMock())
    self.deploy = self._GetDeployChrome(
        list(_REGULAR_TO) + ['--gs-path', _GS_PATH, '--force'])


class TestDisableRootfsVerification(DeployTest):
  """Testing disabling of rootfs verification and RO mode."""

  def testDisableRootfsVerificationSuccess(self):
    """Test the working case, disabling rootfs verification."""
    self.deploy_mock.MockMountCmd(0)
    self.deploy._DisableRootfsVerification()
    self.assertFalse(self.deploy._rootfs_is_still_readonly.is_set())

  def testDisableRootfsVerificationFailure(self):
    """Test failure to disable rootfs verification."""
    self.assertRaises(cros_build_lib.RunCommandError,
                      self.deploy._DisableRootfsVerification)
    self.assertFalse(self.deploy._rootfs_is_still_readonly.is_set())


class TestMount(DeployTest):
  """Testing mount success and failure."""

  def testSuccess(self):
    """Test case where we are able to mount as writable."""
    self.assertFalse(self.deploy._rootfs_is_still_readonly.is_set())
    self.deploy_mock.MockMountCmd(0)
    self.deploy._MountRootfsAsWritable()
    self.assertFalse(self.deploy._rootfs_is_still_readonly.is_set())

  def testMountError(self):
    """Test that mount failure doesn't raise an exception by default."""
    self.assertFalse(self.deploy._rootfs_is_still_readonly.is_set())
    self.deploy._MountRootfsAsWritable()
    self.assertTrue(self.deploy._rootfs_is_still_readonly.is_set())

  def testMountRwFailure(self):
    """Test that mount failure raises an exception if error_code_ok=False."""
    self.assertRaises(cros_build_lib.RunCommandError,
                      self.deploy._MountRootfsAsWritable, error_code_ok=False)
    self.assertFalse(self.deploy._rootfs_is_still_readonly.is_set())


class TestUiJobStarted(DeployTest):
  """Test detection of a running 'ui' job."""

  def MockStatusUiCmd(self, **kwargs):
    self.deploy_mock.rsh_mock.AddCmdResult('status ui', **kwargs)

  def testUiJobStartedFalse(self):
    """Correct results with a stopped job."""
    self.MockStatusUiCmd(output='ui stop/waiting')
    self.assertFalse(self.deploy._CheckUiJobStarted())

  def testNoUiJob(self):
    """Correct results when the job doesn't exist."""
    self.MockStatusUiCmd(error='start: Unknown job: ui', returncode=1)
    self.assertFalse(self.deploy._CheckUiJobStarted())

  def testCheckRootfsWriteableTrue(self):
    """Correct results with a running job."""
    self.MockStatusUiCmd(output='ui start/running, process 297')
    self.assertTrue(self.deploy._CheckUiJobStarted())


class StagingTest(cros_test_lib.MockTempDirTestCase):
  """Test user-mode and ebuild-mode staging functionality."""

  def setUp(self):
    self.staging_dir = os.path.join(self.tempdir, 'staging')
    self.build_dir = os.path.join(self.tempdir, 'build_dir')
    self.common_flags = ['--build-dir', self.build_dir,
                         '--board=lumpy', '--staging-only', '--cache-dir',
                         self.tempdir]
    self.sdk_mock = self.StartPatcher(cros_chrome_sdk_unittest.SDKFetcherMock())
    self.PatchObject(
        osutils, 'SourceEnvironment', autospec=True,
        return_value={'STRIP': 'x86_64-cros-linux-gnu-strip'})

  def testSingleFileDeployFailure(self):
    """Default staging enforces that mandatory files are copied"""
    options, _ = _ParseCommandLine(self.common_flags)
    osutils.Touch(os.path.join(self.build_dir, 'chrome'), makedirs=True)
    self.assertRaises(
        chrome_util.MissingPathError, deploy_chrome._PrepareStagingDir,
        options, self.tempdir, self.staging_dir)

  def testSloppyDeployFailure(self):
    """Sloppy staging enforces that at least one file is copied."""
    options, _ = _ParseCommandLine(self.common_flags + ['--sloppy'])
    self.assertRaises(
        chrome_util.MissingPathError, deploy_chrome._PrepareStagingDir,
        options, self.tempdir, self.staging_dir)

  def testSloppyDeploySuccess(self):
    """Sloppy staging - stage one file."""
    options, _ = _ParseCommandLine(self.common_flags + ['--sloppy'])
    osutils.Touch(os.path.join(self.build_dir, 'chrome'), makedirs=True)
    deploy_chrome._PrepareStagingDir(options, self.tempdir, self.staging_dir)

  def testEmptyDeployStrict(self):
    """Strict staging fails when there are no files."""
    options, _ = _ParseCommandLine(
        self.common_flags + ['--gyp-defines', 'chromeos=1', '--strict'])
    chrome_util.MissingPathError(deploy_chrome._PrepareStagingDir,
        options, self.tempdir, self.staging_dir)

    self.assertRaises(
        chrome_util.MissingPathError, deploy_chrome._PrepareStagingDir,
        options, self.tempdir, self.staging_dir)


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