# -*- coding: utf-8 -*-
# Copyright 2013 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Unit tests for parallel upload functions in copy_helper."""

import datetime
import logging
import os

from apitools.base.py import exceptions as apitools_exceptions
import mock

from gslib.cloud_api import ResumableUploadAbortException
from gslib.cloud_api import ResumableUploadException
from gslib.cloud_api import ResumableUploadStartOverException
from gslib.cloud_api import ServiceException
from gslib.command import CreateGsutilLogger
from gslib.discard_messages_queue import DiscardMessagesQueue
from gslib.gcs_json_api import GcsJsonApi
from gslib.parallel_tracker_file import ObjectFromTracker
from gslib.storage_url import StorageUrlFromString
from gslib.tests.mock_cloud_api import MockCloudApi
from gslib.tests.testcase.unit_testcase import GsUtilUnitTestCase
from gslib.tests.util import GSMockBucketStorageUri
from gslib.tests.util import SetBotoConfigForTest
from gslib.tests.util import unittest
from gslib.third_party.storage_apitools import storage_v1_messages as apitools_messages
from gslib.utils import parallelism_framework_util
from gslib.utils import posix_util
from gslib.utils import system_util
from gslib.utils import hashing_helper
from gslib.utils.copy_helper import _DelegateUploadFileToObject
from gslib.utils.copy_helper import _GetPartitionInfo
from gslib.utils.copy_helper import _SelectUploadCompressionStrategy
from gslib.utils.copy_helper import _SetContentTypeFromFile
from gslib.utils.copy_helper import FilterExistingComponents
from gslib.utils.copy_helper import GZIP_ALL_FILES
from gslib.utils.copy_helper import PerformParallelUploadFileToObjectArgs
from gslib.utils.copy_helper import WarnIfMvEarlyDeletionChargeApplies

_CalculateB64EncodedMd5FromContents = (
    hashing_helper.CalculateB64EncodedMd5FromContents)


class TestCpFuncs(GsUtilUnitTestCase):
  """Unit tests for parallel upload functions in cp command."""

  def testGetPartitionInfo(self):
    """Tests the _GetPartitionInfo function."""
    # Simplest case - threshold divides file_size.
    (num_components, component_size) = _GetPartitionInfo(300, 200, 10)
    self.assertEqual(30, num_components)
    self.assertEqual(10, component_size)

    # Threshold = 1 (mod file_size).
    (num_components, component_size) = _GetPartitionInfo(301, 200, 10)
    self.assertEqual(31, num_components)
    self.assertEqual(10, component_size)

    # Threshold = -1 (mod file_size).
    (num_components, component_size) = _GetPartitionInfo(299, 200, 10)
    self.assertEqual(30, num_components)
    self.assertEqual(10, component_size)

    # Too many components needed.
    (num_components, component_size) = _GetPartitionInfo(301, 2, 10)
    self.assertEqual(2, num_components)
    self.assertEqual(151, component_size)

    # Test num_components with huge numbers.
    (num_components, component_size) = _GetPartitionInfo((10 ** 150) + 1,
                                                         10 ** 200,
                                                         10)
    self.assertEqual((10 ** 149) + 1, num_components)
    self.assertEqual(10, component_size)

    # Test component_size with huge numbers.
    (num_components, component_size) = _GetPartitionInfo((10 ** 150) + 1,
                                                         10,
                                                         10)
    self.assertEqual(10, num_components)
    self.assertEqual((10 ** 149) + 1, component_size)

    # Test component_size > file_size (make sure we get at least two components.
    (num_components, component_size) = _GetPartitionInfo(100, 500, 51)
    self.assertEquals(2, num_components)
    self.assertEqual(50, component_size)

  def testFilterExistingComponentsNonVersioned(self):
    """Tests upload with a variety of component states."""
    mock_api = MockCloudApi()
    bucket_name = self.MakeTempName('bucket')
    tracker_file = self.CreateTempFile(file_name='foo', contents='asdf')
    tracker_file_lock = parallelism_framework_util.CreateLock()

    # dst_obj_metadata used for passing content-type.
    empty_object = apitools_messages.Object()

    # Already uploaded, contents still match, component still used.
    fpath_uploaded_correctly = self.CreateTempFile(file_name='foo1',
                                                   contents='1')
    fpath_uploaded_correctly_url = StorageUrlFromString(
        str(fpath_uploaded_correctly))
    object_uploaded_correctly_url = StorageUrlFromString('%s://%s/%s' % (
        self.default_provider, bucket_name,
        fpath_uploaded_correctly))
    with open(fpath_uploaded_correctly) as f_in:
      fpath_uploaded_correctly_md5 = _CalculateB64EncodedMd5FromContents(f_in)
    mock_api.MockCreateObjectWithMetadata(
        apitools_messages.Object(bucket=bucket_name,
                                 name=fpath_uploaded_correctly,
                                 md5Hash=fpath_uploaded_correctly_md5),
        contents='1')

    args_uploaded_correctly = PerformParallelUploadFileToObjectArgs(
        fpath_uploaded_correctly, 0, 1, fpath_uploaded_correctly_url,
        object_uploaded_correctly_url, '', empty_object, tracker_file,
        tracker_file_lock, None, False)

    # Not yet uploaded, but needed.
    fpath_not_uploaded = self.CreateTempFile(file_name='foo2', contents='2')
    fpath_not_uploaded_url = StorageUrlFromString(str(fpath_not_uploaded))
    object_not_uploaded_url = StorageUrlFromString('%s://%s/%s' % (
        self.default_provider, bucket_name, fpath_not_uploaded))
    args_not_uploaded = PerformParallelUploadFileToObjectArgs(
        fpath_not_uploaded, 0, 1, fpath_not_uploaded_url,
        object_not_uploaded_url, '', empty_object, tracker_file,
        tracker_file_lock, None, False)

    # Already uploaded, but contents no longer match. Even though the contents
    # differ, we don't delete this since the bucket is not versioned and it
    # will be overwritten anyway.
    fpath_wrong_contents = self.CreateTempFile(file_name='foo4', contents='4')
    fpath_wrong_contents_url = StorageUrlFromString(str(fpath_wrong_contents))
    object_wrong_contents_url = StorageUrlFromString('%s://%s/%s' % (
        self.default_provider, bucket_name, fpath_wrong_contents))
    with open(self.CreateTempFile(contents='_')) as f_in:
      fpath_wrong_contents_md5 = _CalculateB64EncodedMd5FromContents(f_in)
    mock_api.MockCreateObjectWithMetadata(
        apitools_messages.Object(bucket=bucket_name,
                                 name=fpath_wrong_contents,
                                 md5Hash=fpath_wrong_contents_md5),
        contents='1')

    args_wrong_contents = PerformParallelUploadFileToObjectArgs(
        fpath_wrong_contents, 0, 1, fpath_wrong_contents_url,
        object_wrong_contents_url, '', empty_object, tracker_file,
        tracker_file_lock, None, False)

    # Exists in tracker file, but component object no longer exists.
    fpath_remote_deleted = self.CreateTempFile(file_name='foo5', contents='5')
    fpath_remote_deleted_url = StorageUrlFromString(
        str(fpath_remote_deleted))
    args_remote_deleted = PerformParallelUploadFileToObjectArgs(
        fpath_remote_deleted, 0, 1, fpath_remote_deleted_url, '', '',
        empty_object, tracker_file, tracker_file_lock, None, False)

    # Exists in tracker file and already uploaded, but no longer needed.
    fpath_no_longer_used = self.CreateTempFile(file_name='foo6', contents='6')
    with open(fpath_no_longer_used) as f_in:
      file_md5 = _CalculateB64EncodedMd5FromContents(f_in)
    mock_api.MockCreateObjectWithMetadata(
        apitools_messages.Object(bucket=bucket_name,
                                 name='foo6', md5Hash=file_md5), contents='6')

    dst_args = {fpath_uploaded_correctly: args_uploaded_correctly,
                fpath_not_uploaded: args_not_uploaded,
                fpath_wrong_contents: args_wrong_contents,
                fpath_remote_deleted: args_remote_deleted}

    existing_components = [ObjectFromTracker(fpath_uploaded_correctly, ''),
                           ObjectFromTracker(fpath_wrong_contents, ''),
                           ObjectFromTracker(fpath_remote_deleted, ''),
                           ObjectFromTracker(fpath_no_longer_used, '')]

    bucket_url = StorageUrlFromString('%s://%s' % (self.default_provider,
                                                   bucket_name))

    (components_to_upload, uploaded_components, existing_objects_to_delete) = (
        FilterExistingComponents(dst_args, existing_components,
                                 bucket_url, mock_api))
    uploaded_components = [i[0] for i in uploaded_components]
    for arg in [args_not_uploaded, args_wrong_contents, args_remote_deleted]:
      self.assertTrue(arg in components_to_upload)
    self.assertEqual(1, len(uploaded_components))
    self.assertEqual(args_uploaded_correctly.dst_url.url_string,
                     uploaded_components[0].url_string)
    self.assertEqual(1, len(existing_objects_to_delete))
    no_longer_used_url = StorageUrlFromString('%s://%s/%s' % (
        self.default_provider, bucket_name, fpath_no_longer_used))
    self.assertEqual(no_longer_used_url.url_string,
                     existing_objects_to_delete[0].url_string)

  def testFilterExistingComponentsVersioned(self):
    """Tests upload with versionined parallel components."""

    mock_api = MockCloudApi()
    bucket_name = self.MakeTempName('bucket')
    mock_api.MockCreateVersionedBucket(bucket_name)

    # dst_obj_metadata used for passing content-type.
    empty_object = apitools_messages.Object()

    tracker_file = self.CreateTempFile(file_name='foo', contents='asdf')
    tracker_file_lock = parallelism_framework_util.CreateLock()

    # Already uploaded, contents still match, component still used.
    fpath_uploaded_correctly = self.CreateTempFile(file_name='foo1',
                                                   contents='1')
    fpath_uploaded_correctly_url = StorageUrlFromString(
        str(fpath_uploaded_correctly))
    with open(fpath_uploaded_correctly) as f_in:
      fpath_uploaded_correctly_md5 = _CalculateB64EncodedMd5FromContents(f_in)
    object_uploaded_correctly = mock_api.MockCreateObjectWithMetadata(
        apitools_messages.Object(bucket=bucket_name,
                                 name=fpath_uploaded_correctly,
                                 md5Hash=fpath_uploaded_correctly_md5),
        contents='1')
    object_uploaded_correctly_url = StorageUrlFromString('%s://%s/%s#%s' % (
        self.default_provider, bucket_name,
        fpath_uploaded_correctly, object_uploaded_correctly.generation))
    args_uploaded_correctly = PerformParallelUploadFileToObjectArgs(
        fpath_uploaded_correctly, 0, 1, fpath_uploaded_correctly_url,
        object_uploaded_correctly_url, object_uploaded_correctly.generation,
        empty_object, tracker_file, tracker_file_lock, None, False)

    # Duplicate object name in tracker file, but uploaded correctly.
    fpath_duplicate = fpath_uploaded_correctly
    fpath_duplicate_url = StorageUrlFromString(str(fpath_duplicate))
    duplicate_uploaded_correctly = mock_api.MockCreateObjectWithMetadata(
        apitools_messages.Object(bucket=bucket_name,
                                 name=fpath_duplicate,
                                 md5Hash=fpath_uploaded_correctly_md5),
        contents='1')
    duplicate_uploaded_correctly_url = StorageUrlFromString('%s://%s/%s#%s' % (
        self.default_provider, bucket_name,
        fpath_uploaded_correctly, duplicate_uploaded_correctly.generation))
    args_duplicate = PerformParallelUploadFileToObjectArgs(
        fpath_duplicate, 0, 1, fpath_duplicate_url,
        duplicate_uploaded_correctly_url,
        duplicate_uploaded_correctly.generation, empty_object, tracker_file,
        tracker_file_lock, None, False)

    # Already uploaded, but contents no longer match.
    fpath_wrong_contents = self.CreateTempFile(file_name='foo4', contents='4')
    fpath_wrong_contents_url = StorageUrlFromString(str(fpath_wrong_contents))
    with open(self.CreateTempFile(contents='_')) as f_in:
      fpath_wrong_contents_md5 = _CalculateB64EncodedMd5FromContents(f_in)
    object_wrong_contents = mock_api.MockCreateObjectWithMetadata(
        apitools_messages.Object(bucket=bucket_name,
                                 name=fpath_wrong_contents,
                                 md5Hash=fpath_wrong_contents_md5),
        contents='_')
    wrong_contents_url = StorageUrlFromString('%s://%s/%s#%s' % (
        self.default_provider, bucket_name,
        fpath_wrong_contents, object_wrong_contents.generation))
    args_wrong_contents = PerformParallelUploadFileToObjectArgs(
        fpath_wrong_contents, 0, 1, fpath_wrong_contents_url,
        wrong_contents_url, '', empty_object, tracker_file,
        tracker_file_lock, None, False)

    dst_args = {fpath_uploaded_correctly: args_uploaded_correctly,
                fpath_wrong_contents: args_wrong_contents}

    existing_components = [
        ObjectFromTracker(fpath_uploaded_correctly,
                          object_uploaded_correctly_url.generation),
        ObjectFromTracker(fpath_duplicate,
                          duplicate_uploaded_correctly_url.generation),
        ObjectFromTracker(fpath_wrong_contents,
                          wrong_contents_url.generation)]

    bucket_url = StorageUrlFromString('%s://%s' % (self.default_provider,
                                                   bucket_name))

    (components_to_upload, uploaded_components, existing_objects_to_delete) = (
        FilterExistingComponents(dst_args, existing_components,
                                 bucket_url, mock_api))
    uploaded_components = [i[0] for i in uploaded_components]
    self.assertEqual([args_wrong_contents], components_to_upload)
    self.assertEqual(args_uploaded_correctly.dst_url.url_string,
                     uploaded_components[0].url_string)
    expected_to_delete = [(args_wrong_contents.dst_url.object_name,
                           args_wrong_contents.dst_url.generation),
                          (args_duplicate.dst_url.object_name,
                           args_duplicate.dst_url.generation)]
    for uri in existing_objects_to_delete:
      self.assertTrue((uri.object_name, uri.generation) in expected_to_delete)
    self.assertEqual(len(expected_to_delete), len(existing_objects_to_delete))

  # pylint: disable=protected-access
  def testTranslateApitoolsResumableUploadException(self):
    """Tests that _TranslateApitoolsResumableUploadException works correctly."""
    gsutil_api = GcsJsonApi(
        GSMockBucketStorageUri,
        CreateGsutilLogger('copy_test'),
        DiscardMessagesQueue())

    gsutil_api.http.disable_ssl_certificate_validation = True
    exc = apitools_exceptions.HttpError({'status': 503}, None, None)
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc, ServiceException))

    gsutil_api.http.disable_ssl_certificate_validation = False
    exc = apitools_exceptions.HttpError({'status': 503}, None, None)
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc, ResumableUploadException))

    gsutil_api.http.disable_ssl_certificate_validation = False
    exc = apitools_exceptions.HttpError({'status': 429}, None, None)
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc, ResumableUploadException))

    exc = apitools_exceptions.HttpError({'status': 410}, None, None)
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc,
                               ResumableUploadStartOverException))

    exc = apitools_exceptions.HttpError({'status': 404}, None, None)
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc,
                               ResumableUploadStartOverException))

    exc = apitools_exceptions.HttpError({'status': 401}, None, None)
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc, ResumableUploadAbortException))

    exc = apitools_exceptions.TransferError('Aborting transfer')
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc, ResumableUploadAbortException))
    exc = apitools_exceptions.TransferError('additional bytes left in stream')
    translated_exc = gsutil_api._TranslateApitoolsResumableUploadException(exc)
    self.assertTrue(isinstance(translated_exc, ResumableUploadAbortException))
    self.assertIn('this can happen if a file changes size',
                  translated_exc.reason)

  def testSetContentTypeFromFile(self):
    """Tests that content type is correctly determined for symlinks."""
    if system_util.IS_WINDOWS:
      return unittest.skip('use_magicfile features not available on Windows')

    surprise_html = '<html><body>And you thought I was just text!</body></html>'
    temp_dir_path = self.CreateTempDir()
    txt_file_path = self.CreateTempFile(
        tmpdir=temp_dir_path, contents=surprise_html,
        file_name='html_in_disguise.txt')
    link_name = 'link_to_realfile'  # Notice no file extension was supplied.
    os.symlink(txt_file_path, temp_dir_path + os.path.sep + link_name)
    # Content-type of a symlink should be obtained from the link's target.
    dst_obj_metadata_mock = mock.MagicMock(contentType=None)
    src_url_stub = mock.MagicMock(
        object_name=temp_dir_path + os.path.sep + link_name,
        **{'IsFileUrl.return_value': True,
           'IsStream.return_value': False,
           'IsFifo.return_value': False})

    # The file command should detect HTML in the real file.
    with SetBotoConfigForTest([('GSUtil', 'use_magicfile', 'True')]):
      _SetContentTypeFromFile(src_url_stub, dst_obj_metadata_mock)
    self.assertEqual(
        'text/html; charset=us-ascii', dst_obj_metadata_mock.contentType)

    dst_obj_metadata_mock = mock.MagicMock(contentType=None)
    # The mimetypes module should guess based on the real file's extension.
    with SetBotoConfigForTest([('GSUtil', 'use_magicfile', 'False')]):
      _SetContentTypeFromFile(src_url_stub, dst_obj_metadata_mock)
    self.assertEqual('text/plain', dst_obj_metadata_mock.contentType)

  _PI_DAY = datetime.datetime(2016, 3, 14, 15, 9, 26)

  @mock.patch('time.time',
              new=mock.MagicMock(
                  return_value=posix_util.ConvertDatetimeToPOSIX(_PI_DAY)))
  def testWarnIfMvEarlyDeletionChargeApplies(self):
    """Tests that WarnIfEarlyDeletionChargeApplies warns when appropriate."""
    test_logger = logging.Logger('test')
    src_url = StorageUrlFromString('gs://bucket/object')

    # Recent nearline objects should generate a warning.
    for object_time_created in (
        self._PI_DAY, self._PI_DAY - datetime.timedelta(days=29, hours=23)):
      recent_nearline_obj = apitools_messages.Object(
          storageClass='NEARLINE',
          timeCreated=object_time_created)

      with mock.patch.object(test_logger, 'warn') as mocked_warn:
        WarnIfMvEarlyDeletionChargeApplies(src_url, recent_nearline_obj,
                                           test_logger)
        mocked_warn.assert_called_with(
            'Warning: moving %s object %s may incur an early deletion '
            'charge, because the original object is less than %s days old '
            'according to the local system time.', 'nearline',
            src_url.url_string, 30)

    # Recent coldine objects should generate a warning.
    for object_time_created in (
        self._PI_DAY, self._PI_DAY - datetime.timedelta(days=89, hours=23)):
      recent_nearline_obj = apitools_messages.Object(
          storageClass='COLDLINE',
          timeCreated=object_time_created)

      with mock.patch.object(test_logger, 'warn') as mocked_warn:
        WarnIfMvEarlyDeletionChargeApplies(src_url, recent_nearline_obj,
                                           test_logger)
        mocked_warn.assert_called_with(
            'Warning: moving %s object %s may incur an early deletion '
            'charge, because the original object is less than %s days old '
            'according to the local system time.', 'coldline',
            src_url.url_string, 90)

    # Sufficiently old objects should not generate a warning.
    with mock.patch.object(test_logger, 'warn') as mocked_warn:
      old_nearline_obj = apitools_messages.Object(
          storageClass='NEARLINE',
          timeCreated=self._PI_DAY - datetime.timedelta(days=30, seconds=1))
      WarnIfMvEarlyDeletionChargeApplies(src_url, old_nearline_obj, test_logger)
      mocked_warn.assert_not_called()
    with mock.patch.object(test_logger, 'warn') as mocked_warn:
      old_coldline_obj = apitools_messages.Object(
          storageClass='COLDLINE',
          timeCreated=self._PI_DAY - datetime.timedelta(days=90, seconds=1))
      WarnIfMvEarlyDeletionChargeApplies(src_url, old_coldline_obj, test_logger)
      mocked_warn.assert_not_called()

    # Recent standard storage class object should not generate a warning.
    with mock.patch.object(test_logger, 'warn') as mocked_warn:
      not_old_enough_nearline_obj = apitools_messages.Object(
          storageClass='STANDARD',
          timeCreated=self._PI_DAY)
      WarnIfMvEarlyDeletionChargeApplies(src_url, not_old_enough_nearline_obj,
                                         test_logger)
      mocked_warn.assert_not_called()

  def testSelectUploadCompressionStrategyAll(self):
    paths = ('file://test', 'test.xml', 'test.py')
    exts = GZIP_ALL_FILES
    for path in paths:
      zipped, gzip_encoded = _SelectUploadCompressionStrategy(
          path, False, exts, False)
      self.assertTrue(zipped)
      self.assertFalse(gzip_encoded)
      zipped, gzip_encoded = _SelectUploadCompressionStrategy(
          path, False, exts, True)
      self.assertFalse(zipped)
      self.assertTrue(gzip_encoded)

  def testSelectUploadCompressionStrategyFilter(self):
    zipped, gzip_encoded = _SelectUploadCompressionStrategy(
        'test.xml', False, ['xml'], False)
    self.assertTrue(zipped)
    self.assertFalse(gzip_encoded)
    zipped, gzip_encoded = _SelectUploadCompressionStrategy(
        'test.xml', False, ['yaml'], False)
    self.assertFalse(zipped)
    self.assertFalse(gzip_encoded)

  def testSelectUploadCompressionStrategyComponent(self):
    zipped, gzip_encoded = _SelectUploadCompressionStrategy(
        'test.xml', True, ['not_matching'], True)
    self.assertFalse(zipped)
    self.assertTrue(gzip_encoded)

  def testDelegateUploadFileToObjectNormal(self):
    mock_stream = mock.Mock()
    mock_stream.close = mock.Mock()
    def DelegateUpload():
      return 'a', 'b'
    elapsed_time, uploaded_object = _DelegateUploadFileToObject(
        DelegateUpload, 'url', mock_stream, False, False, False, None)
    # Ensure results are passed through.
    self.assertEqual(elapsed_time, 'a')
    self.assertEqual(uploaded_object, 'b')
    # Ensure close was called.
    self.assertTrue(mock_stream.close.called)

  @mock.patch('os.unlink')
  def testDelegateUploadFileToObjectZipped(self, mock_unlink):
    mock_stream = mock.Mock()
    mock_stream.close = mock.Mock()
    mock_upload_url = mock.Mock()
    mock_upload_url.object_name = 'Sample'
    def DelegateUpload():
      return 'a', 'b'
    elapsed_time, uploaded_object = _DelegateUploadFileToObject(
        DelegateUpload, mock_upload_url, mock_stream, True, False, False, None)
    # Ensure results are passed through.
    self.assertEqual(elapsed_time, 'a')
    self.assertEqual(uploaded_object, 'b')
    # Ensure the file was unlinked.
    self.assertTrue(mock_unlink.called)
    # Ensure close was called.
    self.assertTrue(mock_stream.close.called)

  @mock.patch('gslib.command.concurrent_compressed_upload_lock')
  def testDelegateUploadFileToObjectGzipEncoded(self, mock_lock):
    mock_stream = mock.Mock()
    mock_stream.close = mock.Mock()
    def DelegateUpload():
      # Ensure the lock was aquired before the delegate was called.
      self.assertTrue(mock_lock.__enter__.called)
      return 'a', 'b'
    elapsed_time, uploaded_object = _DelegateUploadFileToObject(
        DelegateUpload, 'url', mock_stream, False, True, False, None)
    # Ensure results are passed through.
    self.assertEqual(elapsed_time, 'a')
    self.assertEqual(uploaded_object, 'b')
    # Ensure close was called.
    self.assertTrue(mock_stream.close.called)
    # Ensure the lock was released.
    self.assertTrue(mock_lock.__exit__.called)

  @mock.patch('gslib.command.concurrent_compressed_upload_lock')
  def testDelegateUploadFileToObjectGzipEncodedComposite(self, mock_lock):
    mock_stream = mock.Mock()
    mock_stream.close = mock.Mock()
    def DelegateUpload():
      # Ensure the lock was not aquired before the delegate was called.
      self.assertFalse(mock_lock.__enter__.called)
      return 'a', 'b'
    elapsed_time, uploaded_object = _DelegateUploadFileToObject(
        DelegateUpload, 'url', mock_stream, False, True, True, None)
    # Ensure results are passed through.
    self.assertEqual(elapsed_time, 'a')
    self.assertEqual(uploaded_object, 'b')
    # Ensure close was called.
    self.assertTrue(mock_stream.close.called)
    # Ensure the lock was released.
    self.assertFalse(mock_lock.__exit__.called)
