# coding: utf-8 # ------------------------------------------------------------------------- # Copyright (c) Microsoft Corporation. All rights reserved. # Licensed under the MIT License. See License.txt in the project root for # license information. # -------------------------------------------------------------------------- import unittest from datetime import datetime, timedelta import pytest from azure.core import MatchConditions from azure.core.exceptions import HttpResponseError, ResourceExistsError, ResourceNotFoundError, \ ClientAuthenticationError, ResourceModifiedError from azure.storage.filedatalake import ContentSettings, generate_account_sas, generate_file_sas, \ ResourceTypes, AccountSasPermissions, \ DataLakeFileClient, FileSystemClient, DataLakeDirectoryClient, FileSasPermissions, generate_file_system_sas, \ FileSystemSasPermissions from azure.storage.filedatalake import DataLakeServiceClient from azure.storage.filedatalake._generated.models import StorageErrorException from testcase import ( StorageTestCase, record, TestMode ) # ------------------------------------------------------------------------------ TEST_DIRECTORY_PREFIX = 'directory' TEST_FILE_PREFIX = 'file' FILE_PATH = 'file_output.temp.dat' # ------------------------------------------------------------------------------ class FileTest(StorageTestCase): def setUp(self): super(FileTest, self).setUp() url = self._get_account_url() self.dsc = DataLakeServiceClient(url, credential=self.settings.STORAGE_DATA_LAKE_ACCOUNT_KEY, logging_enable=True) self.config = self.dsc._config self.file_system_name = self.get_resource_name('filesystem') if not self.is_playback(): file_system = self.dsc.get_file_system_client(self.file_system_name) try: file_system.create_file_system(timeout=5) except ResourceExistsError: pass def tearDown(self): if not self.is_playback(): try: self.dsc.delete_file_system(self.file_system_name) except: pass return super(FileTest, self).tearDown() # --Helpers----------------------------------------------------------------- def _get_directory_reference(self, prefix=TEST_DIRECTORY_PREFIX): directory_name = self.get_resource_name(prefix) return directory_name def _get_file_reference(self, prefix=TEST_FILE_PREFIX): file_name = self.get_resource_name(prefix) return file_name def _create_file_system(self): return self.dsc.create_file_system(self._get_file_system_reference()) def _create_directory_and_return_client(self, directory=None): directory_name = directory if directory else self._get_directory_reference() directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() return directory_client def _create_file_and_return_client(self, directory="", file=None): if directory: self._create_directory_and_return_client(directory) if not file: file = self._get_file_reference() file_client = self.dsc.get_file_client(self.file_system_name, directory + '/' + file) file_client.create_file() return file_client # --Helpers----------------------------------------------------------------- @record def test_create_file(self): # Arrange directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() file_client = directory_client.get_file_client('filename') response = file_client.create_file() # Assert self.assertIsNotNone(response) @record def test_create_file_using_oauth_token_credential(self): # Arrange file_name = self._get_file_reference() token_credential = self.generate_oauth_token() # Create a directory to put the file under that file_client = DataLakeFileClient(self.dsc.url, self.file_system_name, file_name, credential=token_credential) response = file_client.create_file() # Assert self.assertIsNotNone(response) @record def test_create_file_with_existing_name(self): # Arrange file_client = self._create_file_and_return_client() with self.assertRaises(ResourceExistsError): # if the file exists then throw error # if_none_match='*' is to make sure no existing file file_client.create_file(match_condition=MatchConditions.IfMissing) @record def test_create_file_with_lease_id(self): # Arrange directory_name = self._get_directory_reference() directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() file_client = directory_client.get_file_client('filename') # Act file_client.create_file() lease = file_client.acquire_lease() create_resp = file_client.create_file(lease=lease) # Assert file_properties = file_client.get_file_properties() self.assertIsNotNone(file_properties) self.assertEqual(file_properties.etag, create_resp.get('etag')) self.assertEqual(file_properties.last_modified, create_resp.get('last_modified')) @record def test_create_file_under_root_directory(self): # Arrange # get a file client to interact with the file under root directory file_client = self.dsc.get_file_client(self.file_system_name, "filename") response = file_client.create_file() # Assert self.assertIsNotNone(response) @record def test_append_data(self): directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() file_client = directory_client.get_file_client('filename') file_client.create_file() # Act response = file_client.append_data(b'abc', 0, 3) self.assertIsNotNone(response) @record def test_append_empty_data(self): file_client = self._create_file_and_return_client() # Act file_client.flush_data(0) file_props = file_client.get_file_properties() self.assertIsNotNone(file_props['size'], 0) @record def test_flush_data(self): directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() file_client = directory_client.get_file_client('filename') file_client.create_file() # Act file_client.append_data(b'abc', 0, 3) response = file_client.flush_data(3) # Assert prop = file_client.get_file_properties() self.assertIsNotNone(response) self.assertEqual(prop['size'], 3) @record def test_flush_data_with_match_condition(self): directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() file_client = directory_client.get_file_client('filename') resp = file_client.create_file() # Act file_client.append_data(b'abc', 0, 3) # flush is successful because it isn't touched response = file_client.flush_data(3, etag=resp['etag'], match_condition=MatchConditions.IfNotModified) file_client.append_data(b'abc', 3, 3) with self.assertRaises(ResourceModifiedError): # flush is unsuccessful because extra data were appended. file_client.flush_data(6, etag=resp['etag'], match_condition=MatchConditions.IfNotModified) def test_upload_data_to_none_existing_file(self): # parallel upload cannot be recorded if TestMode.need_recording_file(self.test_mode): return directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() file_client = directory_client.get_file_client('filename') data = self.get_random_bytes(200*1024) file_client.upload_data(data, overwrite=True, max_concurrency=3) downloaded_data = file_client.download_file().readall() self.assertEqual(data, downloaded_data) @record def test_upload_data_to_existing_file(self): directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() # create an existing file file_client = directory_client.get_file_client('filename') file_client.create_file() file_client.append_data(b"abc", 0) file_client.flush_data(3) # to override the existing file data = self.get_random_bytes(100) with self.assertRaises(HttpResponseError): file_client.upload_data(data, max_concurrency=5) file_client.upload_data(data, overwrite=True, max_concurrency=5) downloaded_data = file_client.download_file().readall() self.assertEqual(data, downloaded_data) @record def test_upload_data_to_existing_file_with_content_settings(self): directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() # create an existing file file_client = directory_client.get_file_client('filename') etag = file_client.create_file()['etag'] # to override the existing file data = self.get_random_bytes(100) content_settings = ContentSettings( content_language='spanish', content_disposition='inline') file_client.upload_data(data, max_concurrency=5, content_settings=content_settings, etag=etag, match_condition=MatchConditions.IfNotModified) downloaded_data = file_client.download_file().readall() properties = file_client.get_file_properties() self.assertEqual(data, downloaded_data) self.assertEqual(properties.content_settings.content_language, content_settings.content_language) @record def test_upload_data_to_existing_file_with_permission_and_umask(self): directory_name = self._get_directory_reference() # Create a directory to put the file under that directory_client = self.dsc.get_directory_client(self.file_system_name, directory_name) directory_client.create_directory() # create an existing file file_client = directory_client.get_file_client('filename') etag = file_client.create_file()['etag'] # to override the existing file data = self.get_random_bytes(100) file_client.upload_data(data, overwrite=True, max_concurrency=5, permissions='0777', umask="0000", etag=etag, match_condition=MatchConditions.IfNotModified) downloaded_data = file_client.download_file().readall() prop = file_client.get_access_control() # Assert self.assertEqual(data, downloaded_data) self.assertEqual(prop['permissions'], 'rwxrwxrwx') @record def test_read_file(self): file_client = self._create_file_and_return_client() data = self.get_random_bytes(1024) # upload data to file file_client.append_data(data, 0, len(data)) file_client.flush_data(len(data)) # doanload the data and make sure it is the same as uploaded data downloaded_data = file_client.download_file().readall() self.assertEqual(data, downloaded_data) @record def test_read_file_with_user_delegation_key(self): # SAS URL is calculated from storage key, so this test runs live only if TestMode.need_recording_file(self.test_mode): return # Create file file_client = self._create_file_and_return_client() data = self.get_random_bytes(1024) # Upload data to file file_client.append_data(data, 0, len(data)) file_client.flush_data(len(data)) # Get user delegation key token_credential = self.generate_oauth_token() service_client = DataLakeServiceClient(self._get_oauth_account_url(), credential=token_credential) user_delegation_key = service_client.get_user_delegation_key(datetime.utcnow(), datetime.utcnow() + timedelta(hours=1)) sas_token = generate_file_sas(file_client.account_name, file_client.file_system_name, None, file_client.path_name, user_delegation_key, permission=FileSasPermissions(read=True, create=True, write=True, delete=True), expiry=datetime.utcnow() + timedelta(hours=1), ) # doanload the data and make sure it is the same as uploaded data new_file_client = DataLakeFileClient(self._get_account_url(), file_client.file_system_name, file_client.path_name, credential=sas_token) downloaded_data = new_file_client.download_file().readall() self.assertEqual(data, downloaded_data) def test_set_acl_with_user_delegation_key(self): # SAS URL is calculated from storage key, so this test runs live only if TestMode.need_recording_file(self.test_mode): return # Create file file_client = self._create_file_and_return_client() data = self.get_random_bytes(1024) # Upload data to file file_client.append_data(data, 0, len(data)) file_client.flush_data(len(data)) # Get user delegation key token_credential = self.generate_oauth_token() service_client = DataLakeServiceClient(self._get_oauth_account_url(), credential=token_credential) user_delegation_key = service_client.get_user_delegation_key(datetime.utcnow(), datetime.utcnow() + timedelta(hours=1)) sas_token = generate_file_sas(file_client.account_name, file_client.file_system_name, None, file_client.path_name, user_delegation_key, permission=FileSasPermissions(execute=True, manage_access_control=True, manage_ownership=True), expiry=datetime.utcnow() + timedelta(hours=1), ) # doanload the data and make sure it is the same as uploaded data new_file_client = DataLakeFileClient(self._get_account_url(), file_client.file_system_name, file_client.path_name, credential=sas_token) acl = 'user::rwx,group::r-x,other::rwx' owner = "dc140949-53b7-44af-b1e9-cd994951fb86" new_file_client.set_access_control(acl=acl, owner=owner) access_control = new_file_client.get_access_control() self.assertEqual(acl, access_control['acl']) self.assertEqual(owner, access_control['owner']) def test_preauthorize_user_with_user_delegation_key(self): # SAS URL is calculated from storage key, so this test runs live only if TestMode.need_recording_file(self.test_mode): return # Create file file_client = self._create_file_and_return_client() data = self.get_random_bytes(1024) # Upload data to file file_client.append_data(data, 0, len(data)) file_client.flush_data(len(data)) file_client.set_access_control(owner="68390a19-a643-458b-b726-408abf67b4fc", permissions='0777') acl = file_client.get_access_control() # Get user delegation key token_credential = self.generate_oauth_token() service_client = DataLakeServiceClient(self._get_oauth_account_url(), credential=token_credential) user_delegation_key = service_client.get_user_delegation_key(datetime.utcnow(), datetime.utcnow() + timedelta(hours=1)) sas_token = generate_file_sas(file_client.account_name, file_client.file_system_name, None, file_client.path_name, user_delegation_key, permission=FileSasPermissions(read=True, write=True, manage_access_control=True, manage_ownership=True), expiry=datetime.utcnow() + timedelta(hours=1), preauthorized_agent_object_id="68390a19-a643-458b-b726-408abf67b4fc" ) # doanload the data and make sure it is the same as uploaded data new_file_client = DataLakeFileClient(self._get_account_url(), file_client.file_system_name, file_client.path_name, credential=sas_token) acl = new_file_client.set_access_control(permissions='0777') self.assertIsNotNone(acl) @record def test_read_file_into_file(self): file_client = self._create_file_and_return_client() data = self.get_random_bytes(1024) # upload data to file file_client.append_data(data, 0, len(data)) file_client.flush_data(len(data)) # doanload the data into a file and make sure it is the same as uploaded data with open(FILE_PATH, 'wb') as stream: download = file_client.download_file(max_concurrency=2) download.readinto(stream) # Assert with open(FILE_PATH, 'rb') as stream: actual = stream.read() self.assertEqual(data, actual) @record def test_read_file_to_text(self): file_client = self._create_file_and_return_client() data = self.get_random_text_data(1024) # upload data to file file_client.append_data(data, 0, len(data)) file_client.flush_data(len(data)) # doanload the text data and make sure it is the same as uploaded data downloaded_data = file_client.download_file(max_concurrency=2, encoding="utf-8").readall() # Assert self.assertEqual(data, downloaded_data) @record def test_account_sas(self): # SAS URL is calculated from storage key, so this test runs live only if TestMode.need_recording_file(self.test_mode): return file_name = self._get_file_reference() # create a file under root directory self._create_file_and_return_client(file=file_name) # generate a token with file level read permission token = generate_account_sas( self.dsc.account_name, self.dsc.credential.account_key, ResourceTypes(file_system=True, object=True), AccountSasPermissions(read=True), datetime.utcnow() + timedelta(hours=1), ) # read the created file which is under root directory file_client = DataLakeFileClient(self.dsc.url, self.file_system_name, file_name, credential=token) properties = file_client.get_file_properties() # make sure we can read the file properties self.assertIsNotNone(properties) # try to write to the created file with the token with self.assertRaises(HttpResponseError): file_client.append_data(b"abcd", 0, 4) @record def test_file_sas_only_applies_to_file_level(self): # SAS URL is calculated from storage key, so this test runs live only if TestMode.need_recording_file(self.test_mode): return file_name = self._get_file_reference() directory_name = self._get_directory_reference() self._create_file_and_return_client(directory=directory_name, file=file_name) # generate a token with file level read and write permissions token = generate_file_sas( self.dsc.account_name, self.file_system_name, directory_name, file_name, self.dsc.credential.account_key, permission=FileSasPermissions(read=True, write=True), expiry=datetime.utcnow() + timedelta(hours=1), ) # read the created file which is under root directory file_client = DataLakeFileClient(self.dsc.url, self.file_system_name, directory_name+'/'+file_name, credential=token) properties = file_client.get_file_properties() # make sure we can read the file properties self.assertIsNotNone(properties) # try to write to the created file with the token response = file_client.append_data(b"abcd", 0, 4, validate_content=True) self.assertIsNotNone(response) # the token is for file level, so users are not supposed to have access to file system level operations file_system_client = FileSystemClient(self.dsc.url, self.file_system_name, credential=token) with self.assertRaises(ClientAuthenticationError): file_system_client.get_file_system_properties() # the token is for file level, so users are not supposed to have access to directory level operations directory_client = DataLakeDirectoryClient(self.dsc.url, self.file_system_name, directory_name, credential=token) with self.assertRaises(ClientAuthenticationError): directory_client.get_directory_properties() @record def test_delete_file(self): # Arrange file_client = self._create_file_and_return_client() file_client.delete_file() with self.assertRaises(ResourceNotFoundError): file_client.get_file_properties() @record def test_delete_file_with_if_unmodified_since(self): # Arrange file_client = self._create_file_and_return_client() prop = file_client.get_file_properties() file_client.delete_file(if_unmodified_since=prop['last_modified']) # Make sure the file was deleted with self.assertRaises(ResourceNotFoundError): file_client.get_file_properties() @record def test_set_access_control(self): file_client = self._create_file_and_return_client() response = file_client.set_access_control(permissions='0777') # Assert self.assertIsNotNone(response) @record def test_set_access_control_with_match_conditions(self): file_client = self._create_file_and_return_client() with self.assertRaises(ResourceModifiedError): file_client.set_access_control(permissions='0777', match_condition=MatchConditions.IfMissing) @record def test_get_access_control(self): file_client = self._create_file_and_return_client() file_client.set_access_control(permissions='0777') # Act response = file_client.get_access_control() # Assert self.assertIsNotNone(response) @record def test_get_access_control_with_if_modified_since(self): file_client = self._create_file_and_return_client() file_client.set_access_control(permissions='0777') prop = file_client.get_file_properties() # Act response = file_client.get_access_control(if_modified_since=prop['last_modified']-timedelta(minutes=15)) # Assert self.assertIsNotNone(response) @record def test_set_access_control_recursive(self): acl = 'user::rwx,group::r-x,other::rwx' file_client = self._create_file_and_return_client() summary = file_client.set_access_control_recursive(acl=acl) # Assert self.assertEqual(summary.counters.directories_successful, 0) self.assertEqual(summary.counters.files_successful, 1) self.assertEqual(summary.counters.failure_count, 0) access_control = file_client.get_access_control() self.assertIsNotNone(access_control) self.assertEqual(acl, access_control['acl']) @record def test_update_access_control_recursive(self): acl = 'user::rwx,group::r-x,other::rwx' file_client = self._create_file_and_return_client() summary = file_client.update_access_control_recursive(acl=acl) # Assert self.assertEqual(summary.counters.directories_successful, 0) self.assertEqual(summary.counters.files_successful, 1) self.assertEqual(summary.counters.failure_count, 0) access_control = file_client.get_access_control() self.assertIsNotNone(access_control) self.assertEqual(acl, access_control['acl']) @record def test_remove_access_control_recursive(self): acl = "mask," + "default:user,default:group," + \ "user:ec3595d6-2c17-4696-8caa-7e139758d24a,group:ec3595d6-2c17-4696-8caa-7e139758d24a," + \ "default:user:ec3595d6-2c17-4696-8caa-7e139758d24a,default:group:ec3595d6-2c17-4696-8caa-7e139758d24a" file_client = self._create_file_and_return_client() summary = file_client.remove_access_control_recursive(acl=acl) # Assert self.assertEqual(summary.counters.directories_successful, 0) self.assertEqual(summary.counters.files_successful, 1) self.assertEqual(summary.counters.failure_count, 0) @record def test_get_properties(self): # Arrange directory_client = self._create_directory_and_return_client() metadata = {'hello': 'world', 'number': '42'} content_settings = ContentSettings( content_language='spanish', content_disposition='inline') file_client = directory_client.create_file("newfile", metadata=metadata, content_settings=content_settings) file_client.append_data(b"abc", 0, 3) file_client.flush_data(3) properties = file_client.get_file_properties() # Assert self.assertTrue(properties) self.assertEqual(properties.size, 3) self.assertEqual(properties.metadata['hello'], metadata['hello']) self.assertEqual(properties.content_settings.content_language, content_settings.content_language) @record def test_set_expiry(self): # Arrange directory_client = self._create_directory_and_return_client() metadata = {'hello': 'world', 'number': '42'} content_settings = ContentSettings( content_language='spanish', content_disposition='inline') expires_on = datetime.utcnow() + timedelta(hours=1) file_client = directory_client.create_file("newfile", metadata=metadata, content_settings=content_settings) file_client.set_file_expiry("Absolute", expires_on=expires_on) properties = file_client.get_file_properties() # Assert self.assertTrue(properties) self.assertIsNotNone(properties.expiry_time) @record def test_rename_file_with_non_used_name(self): file_client = self._create_file_and_return_client() data_bytes = b"abc" file_client.append_data(data_bytes, 0, 3) file_client.flush_data(3) new_client = file_client.rename_file(file_client.file_system_name+'/'+'newname') data = new_client.download_file().readall() self.assertEqual(data, data_bytes) self.assertEqual(new_client.path_name, "newname") def test_rename_file_with_file_system_sas(self): # sas token is calculated from storage key, so live only if TestMode.need_recording_file(self.test_mode): return token = generate_file_system_sas( self.dsc.account_name, self.file_system_name, self.dsc.credential.account_key, FileSystemSasPermissions(write=True, read=True, delete=True), datetime.utcnow() + timedelta(hours=1), ) # read the created file which is under root directory file_client = DataLakeFileClient(self.dsc.url, self.file_system_name, "oldfile", credential=token) file_client.create_file() data_bytes = b"abc" file_client.append_data(data_bytes, 0, 3) file_client.flush_data(3) new_client = file_client.rename_file(file_client.file_system_name+'/'+'newname') data = new_client.download_file().readall() self.assertEqual(data, data_bytes) self.assertEqual(new_client.path_name, "newname") def test_rename_file_with_file_sas(self): # SAS URL is calculated from storage key, so this test runs live only if TestMode.need_recording_file(self.test_mode): return token = generate_file_sas(self.dsc.account_name, self.file_system_name, None, "oldfile", self.settings.STORAGE_DATA_LAKE_ACCOUNT_KEY, permission=FileSasPermissions(read=True, create=True, write=True, delete=True), expiry=datetime.utcnow() + timedelta(hours=1), ) new_token = generate_file_sas(self.dsc.account_name, self.file_system_name, None, "newname", self.settings.STORAGE_DATA_LAKE_ACCOUNT_KEY, permission=FileSasPermissions(read=True, create=True, write=True, delete=True), expiry=datetime.utcnow() + timedelta(hours=1), ) # read the created file which is under root directory file_client = DataLakeFileClient(self.dsc.url, self.file_system_name, "oldfile", credential=token) file_client.create_file() data_bytes = b"abc" file_client.append_data(data_bytes, 0, 3) file_client.flush_data(3) new_client = file_client.rename_file(file_client.file_system_name+'/'+'newname'+'?'+new_token) data = new_client.download_file().readall() self.assertEqual(data, data_bytes) self.assertEqual(new_client.path_name, "newname") def test_rename_file_with_account_sas(self): pytest.skip("service bug") token = generate_account_sas( self.dsc.account_name, self.dsc.credential.account_key, ResourceTypes(object=True), AccountSasPermissions(write=True, read=True, create=True, delete=True), datetime.utcnow() + timedelta(hours=5), ) # read the created file which is under root directory file_client = DataLakeFileClient(self.dsc.url, self.file_system_name, "oldfile", credential=token) file_client.create_file() data_bytes = b"abc" file_client.append_data(data_bytes, 0, 3) file_client.flush_data(3) new_client = file_client.rename_file(file_client.file_system_name+'/'+'newname') data = new_client.download_file().readall() self.assertEqual(data, data_bytes) self.assertEqual(new_client.path_name, "newname") @record def test_rename_file_to_existing_file(self): # create the existing file existing_file_client = self._create_file_and_return_client(file="existingfile") existing_file_client.append_data(b"a", 0, 1) existing_file_client.flush_data(1) old_url = existing_file_client.url # prepare to rename the file to the existing file file_client = self._create_file_and_return_client() data_bytes = b"abc" file_client.append_data(data_bytes, 0, 3) file_client.flush_data(3) new_client = file_client.rename_file(file_client.file_system_name+'/'+existing_file_client.path_name) new_url = file_client.url data = new_client.download_file().readall() # the existing file was overridden self.assertEqual(data, data_bytes) @record def test_rename_file_will_not_change_existing_directory(self): # create none empty directory(with 2 files) dir1 = self._create_directory_and_return_client(directory="dir1") f1 = dir1.create_file("file1") f1.append_data(b"file1", 0, 5) f1.flush_data(5) f2 = dir1.create_file("file2") f2.append_data(b"file2", 0, 5) f2.flush_data(5) # create another none empty directory(with 2 files) dir2 = self._create_directory_and_return_client(directory="dir2") f3 = dir2.create_file("file3") f3.append_data(b"file3", 0, 5) f3.flush_data(5) f4 = dir2.create_file("file4") f4.append_data(b"file4", 0, 5) f4.flush_data(5) new_client = f3.rename_file(f1.file_system_name+'/'+f1.path_name) self.assertEqual(new_client.download_file().readall(), b"file3") # make sure the data in file2 and file4 weren't touched f2_data = f2.download_file().readall() self.assertEqual(f2_data, b"file2") f4_data = f4.download_file().readall() self.assertEqual(f4_data, b"file4") with self.assertRaises(HttpResponseError): f3.download_file().readall() # ------------------------------------------------------------------------------ if __name__ == '__main__': unittest.main()