zerver/tests: Remove unused imports.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

zerver/tests/test_alert_words.py

@@ -17,7 +17,6 @@ from zerver.lib.test_classes import (
 )
 
 from zerver.models import (
-    Recipient,
     UserProfile,
 )
 

zerver/tests/test_audit_log.py

@@ -4,7 +4,7 @@ from django.utils.timezone import now as timezone_now
 from zerver.lib.actions import do_create_user, do_deactivate_user, \
     do_activate_user, do_reactivate_user, do_change_password, \
     do_change_user_delivery_email, do_change_avatar_fields, do_change_bot_owner, \
-    do_regenerate_api_key, do_change_full_name, do_change_tos_version, \
+    do_regenerate_api_key, do_change_tos_version, \
     bulk_add_subscriptions, bulk_remove_subscriptions, get_streams_traffic
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.models import RealmAuditLog, get_client, get_realm

zerver/tests/test_auth_backends.py

@@ -4,17 +4,14 @@ from django.core import mail
 from django.http import HttpResponse
 from django.test import override_settings
 from django_auth_ldap.backend import _LDAPUser
-from django.contrib.auth import authenticate
 from django.test.client import RequestFactory
 from django.utils.timezone import now as timezone_now
 from typing import Any, Callable, Dict, List, Optional, Set, Tuple
-from builtins import object
 from oauth2client.crypt import AppIdentityError
 from django.core import signing
 from django.urls import reverse
 import httpretty
 import os
-import sys
 
 import jwt
 import mock
@@ -22,7 +19,6 @@ import re
 import time
 import datetime
 
-from zerver.forms import HomepageForm
 from zerver.lib.actions import (
     do_deactivate_realm,
     do_deactivate_user,
@@ -44,13 +40,12 @@ from zerver.lib.sessions import get_session_dict_user
 from zerver.lib.test_classes import (
     ZulipTestCase,
 )
-from zerver.lib.test_helpers import POSTRequestMock, HostRequestMock
 from zerver.models import \
     get_realm, email_to_username, UserProfile, \
     PreregistrationUser, Realm, get_user, MultiuseInvite
 from zerver.signals import JUST_CREATED_THRESHOLD
 
-from confirmation.models import Confirmation, confirmation_url, create_confirmation_link
+from confirmation.models import Confirmation, create_confirmation_link
 
 from zproject.backends import ZulipDummyBackend, EmailAuthBackend, \
     GoogleMobileOauth2Backend, ZulipRemoteUserBackend, ZulipLDAPAuthBackend, \
@@ -61,19 +56,15 @@ from zproject.backends import ZulipDummyBackend, EmailAuthBackend, \
     ZulipLDAPException, sync_user_from_ldap
 
 from zerver.views.auth import (maybe_send_to_registration,
-                               login_or_register_remote_user,
                                _subdomain_token_salt)
 from version import ZULIP_VERSION
 
 from social_core.exceptions import AuthFailed, AuthStateForbidden
 from social_django.strategy import DjangoStrategy
 from social_django.storage import BaseDjangoStorage
-from social_core.backends.github import GithubOrganizationOAuth2, GithubTeamOAuth2, \
-    GithubOAuth2
 
 import json
 import urllib
-from http.cookies import SimpleCookie
 import ujson
 from zerver.lib.test_helpers import MockLDAP, load_subdomain_token
 

zerver/tests/test_bots.py

@@ -4,7 +4,6 @@ import os
 import ujson
 
 from django.core import mail
-from django.http import HttpResponse
 from django.test import override_settings
 from mock import patch, MagicMock
 from typing import Any, Dict, List, Mapping
@@ -12,7 +11,7 @@ from typing import Any, Dict, List, Mapping
 from zerver.lib.actions import do_change_stream_invite_only, do_deactivate_user
 from zerver.lib.bot_config import get_bot_config
 from zerver.models import get_realm, get_stream, \
-    Realm, Stream, UserProfile, get_user, get_bot_services, Service, \
+    Realm, UserProfile, get_user, get_bot_services, Service, \
     is_cross_realm_bot_email
 from zerver.lib.test_classes import ZulipTestCase, UploadSerializeMixin
 from zerver.lib.test_helpers import (

zerver/tests/test_bugdown.py

@@ -7,10 +7,8 @@ from zerver.lib.actions import (
     do_set_user_display_setting,
     do_remove_realm_emoji,
     do_set_alert_words,
-    get_realm,
 )
 from zerver.lib.alert_words import alert_words_in_realm
-from zerver.lib.camo import get_camo_url
 from zerver.lib.create_user import create_user
 from zerver.lib.emoji import get_emoji_url
 from zerver.lib.exceptions import BugdownRenderingException
@@ -40,7 +38,6 @@ from zerver.models import (
     Realm,
     RealmEmoji,
     RealmFilter,
-    Recipient,
     UserProfile,
     UserGroup,
 )
@@ -50,8 +47,7 @@ import mock
 import os
 import ujson
 
-import urllib
-from typing import cast, Any, AnyStr, Dict, List, Optional, Set, Tuple
+from typing import cast, Any, Dict, List, Optional, Set, Tuple
 
 class FakeMessage:
     pass

zerver/tests/test_custom_profile_data.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 
 from typing import Union, List, Dict, Any
-from mock import patch
 
 from zerver.lib.actions import get_realm, try_add_realm_custom_profile_field, \
     do_update_user_custom_profile_data, do_remove_realm_custom_profile_field, \

zerver/tests/test_decorators.py

@@ -6,11 +6,9 @@ import os
 from collections import defaultdict
 
 from typing import Any, Dict, Iterable, List, Optional, Tuple
-from django_otp.conf import settings as otp_settings
 
-from django.test import TestCase, override_settings
+from django.test import TestCase
 from django.http import HttpResponse, HttpRequest
-from django.test.client import RequestFactory
 from django.conf import settings
 
 from zerver.forms import OurAuthenticationForm
@@ -23,7 +21,6 @@ from zerver.lib.test_helpers import (
 )
 from zerver.lib.test_classes import (
     ZulipTestCase,
-    WebhookTestCase,
 )
 from zerver.lib.response import json_response, json_success
 from zerver.lib.users import get_api_key
@@ -39,7 +36,7 @@ from zerver.decorator import (
     authenticated_uploads_api_view,
     authenticate_notify, cachify,
     get_client_name, internal_notify_view, is_local_addr,
-    rate_limit, validate_api_key, logged_in_and_active,
+    rate_limit, validate_api_key,
     return_success_on_head_request, to_not_negative_int_or_none,
     zulip_login_required
 )
@@ -50,7 +47,7 @@ from zerver.lib.validator import (
     check_string_fixed_length, check_capped_string, check_color
 )
 from zerver.models import \
-    get_realm, get_user, UserProfile, Client, Realm, Recipient
+    get_realm, get_user, UserProfile, Realm
 
 import ujson
 

zerver/tests/test_docs.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 
-import mock
 import os
 import subprocess
 import ujson
@@ -19,7 +18,6 @@ from zerver.lib.utils import split_by
 from zerver.models import Realm, get_realm
 from zerver.views.integrations import (
     add_api_uri_context,
-    add_integrations_context,
 )
 
 class DocPageTest(ZulipTestCase):

zerver/tests/test_email_change.py

@@ -1,16 +1,10 @@
 # -*- coding: utf-8 -*-
 
 import datetime
-from typing import Any
-from email.utils import parseaddr, formataddr
+from email.utils import parseaddr
 import re
 
-import django
-import mock
-from django.conf import settings
 from django.core import mail
-from django.http import HttpResponse
-from django.urls import reverse
 from django.utils.timezone import now
 
 from confirmation.models import Confirmation, generate_key, confirmation_url
@@ -18,9 +12,7 @@ from zerver.lib.actions import do_start_email_change_process, do_set_realm_prope
 from zerver.lib.test_classes import (
     ZulipTestCase,
 )
-from zerver.lib.send_email import FromAddress
-from zerver.models import get_user_by_delivery_email, EmailChangeStatus, Realm, get_realm, \
-    get_user_profile_by_id, get_user, UserProfile
+from zerver.models import get_user_by_delivery_email, EmailChangeStatus, get_realm
 
 
 class EmailChangeTestCase(ZulipTestCase):

zerver/tests/test_email_mirror.py

@@ -7,7 +7,7 @@ from django.http import HttpResponse
 from zerver.lib.test_helpers import (
     most_recent_message,
     most_recent_usermessage,
-    POSTRequestMock)
+)
 
 from zerver.lib.test_classes import (
     ZulipTestCase,
@@ -32,21 +32,14 @@ from zerver.lib.email_mirror import (
 )
 
 from zerver.lib.send_email import FromAddress
-from zerver.lib.notifications import (
-    handle_missedmessage_emails,
-)
-from zerver.management.commands import email_mirror
 
 from email.mime.text import MIMEText
 from email.mime.image import MIMEImage
 from email.mime.multipart import MIMEMultipart
 
-import re
 import ujson
 import mock
 import os
-import sys
-from io import StringIO
 from django.conf import settings
 
 from typing import Any, Callable, Dict, Mapping, Union, Optional

zerver/tests/test_embedded_bot_system.py

@@ -1,13 +1,11 @@
 # -*- coding: utf-8 -*-
 
-from unittest import mock
 from mock import patch
-from typing import Any, Dict, Tuple, Optional
 
-from zerver.lib.bot_lib import EmbeddedBotQuitException, EmbeddedBotHandler
+from zerver.lib.bot_lib import EmbeddedBotQuitException
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.models import (
-    UserProfile, Recipient, get_display_recipient,
+    UserProfile, get_display_recipient,
     get_service_profile, get_user, get_realm
 )
 

zerver/tests/test_event_queue.py

@@ -10,7 +10,7 @@ from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.test_helpers import POSTRequestMock
 from zerver.models import Recipient, Stream, Subscription, UserProfile, get_stream
 from zerver.tornado.event_queue import maybe_enqueue_notifications, \
-    allocate_client_descriptor, process_message_event, \
+    allocate_client_descriptor, \
     get_client_descriptor, missedmessage_hook, persistent_queue_filename
 from zerver.tornado.views import get_events
 

zerver/tests/test_events.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # See https://zulip.readthedocs.io/en/latest/subsystems/events-system.html for
 # high-level documentation on how this system works.
-from typing import Any, Callable, Dict, List, Optional, Set, Tuple, Union
+from typing import Any, Callable, Dict, List, Optional, Set, Tuple
 import os
 import shutil
 import sys
@@ -13,10 +13,10 @@ from django.utils.timezone import now as timezone_now
 from io import StringIO
 
 from zerver.models import (
-    get_client, get_realm, get_stream_recipient, get_stream, get_user,
+    get_client, get_realm, get_stream_recipient, get_stream,
     Message, RealmDomain, Recipient, UserMessage, UserPresence, UserProfile,
     Realm, Subscription, Stream, flush_per_request_caches, UserGroup, Service,
-    Attachment, PreregistrationUser, UserStatus,
+    Attachment, PreregistrationUser,
 )
 
 from zerver.lib.actions import (
@@ -87,7 +87,6 @@ from zerver.lib.actions import (
     get_typing_user_profiles,
     log_event,
     lookup_default_stream_groups,
-    notify_attachment_update,
     notify_realm_custom_profile_fields,
     check_add_user_group,
     do_update_user_group_name,
@@ -125,7 +124,6 @@ from zerver.lib.validator import (
     check_bool, check_dict, check_dict_only, check_float, check_int, check_list, check_string,
     equals, check_none_or, Validator, check_url
 )
-from zerver.lib.upload import upload_backend, attachment_url_to_path_id
 from zerver.lib.users import get_api_key
 
 from zerver.views.events_register import _default_all_public_streams, _default_narrow
@@ -139,7 +137,6 @@ from zerver.tornado.event_queue import (
 )
 from zerver.tornado.views import get_events
 
-from collections import OrderedDict
 import mock
 import time
 import ujson

zerver/tests/test_external.py

@@ -21,8 +21,6 @@ import DNS
 import mock
 import time
 
-import urllib
-
 class MITNameTest(ZulipTestCase):
     def test_valid_hesiod(self) -> None:
         with mock.patch('DNS.dnslookup', return_value=[['starnine:*:84233:101:Athena Consulting Exchange User,,,:/mit/starnine:/bin/bash']]):

zerver/tests/test_gitter_importer.py

@@ -1,7 +1,4 @@
 # -*- coding: utf-8 -*-
-from django.conf import settings
-from django.utils.timezone import now as timezone_now
-
 from zerver.lib.import_realm import (
     do_import_realm,
 )
@@ -11,11 +8,7 @@ from zerver.lib.test_classes import (
 from zerver.tests.test_import_export import (
     rm_tree,
 )
-from zerver.lib.test_helpers import (
-    get_test_image_file,
-)
 from zerver.models import (
-    Realm,
     get_realm,
     UserProfile,
     Message,
@@ -26,12 +19,10 @@ from zerver.data_import.gitter import (
 )
 
 import ujson
-import json
 import logging
-import shutil
 import os
 import mock
-from typing import Any, AnyStr, Dict, List, Optional, Set, Tuple
+from typing import Any, Dict, List, Set
 
 class GitterImporter(ZulipTestCase):
     logger = logging.getLogger()

zerver/tests/test_home.py

@@ -1,16 +1,13 @@
 
 import datetime
-import os
 import re
 import ujson
 
-from django.conf import settings
 from django.http import HttpResponse
-from django.test import override_settings
 from django.utils.timezone import now as timezone_now
 from mock import MagicMock, patch
 import urllib
-from typing import Any, Dict, List
+from typing import Any, Dict
 
 from zerver.lib.actions import do_create_user
 from zerver.lib.test_classes import ZulipTestCase
@@ -20,7 +17,7 @@ from zerver.lib.test_helpers import (
 from zerver.lib.soft_deactivation import do_soft_deactivate_users
 from zerver.lib.test_runner import slow
 from zerver.models import (
-    get_realm, get_stream, get_user, UserProfile, UserMessage, Recipient,
+    get_realm, get_stream, get_user, UserProfile,
     flush_per_request_caches, DefaultStream, Realm,
 )
 from zerver.views.home import home, sent_time_in_epoch_seconds

zerver/tests/test_hotspots.py

@@ -4,12 +4,8 @@ from zerver.lib.actions import do_mark_hotspot_as_read, do_create_user
 from zerver.lib.hotspots import ALL_HOTSPOTS, get_next_hotspots
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.models import UserProfile, UserHotspot, get_realm
-from zerver.views.hotspots import mark_hotspot_as_read
 
-from django.conf import settings
-from typing import Any, Dict
 import ujson
-import mock
 
 # Splitting this out, since I imagine this will eventually have most of the
 # complicated hotspots logic.

zerver/tests/test_i18n.py

@@ -2,7 +2,6 @@
 
 from typing import Any
 
-import django
 import mock
 import ujson
 from django.test import TestCase
@@ -19,8 +18,6 @@ from zerver.lib.test_classes import (
 from zerver.management.commands import makemessages
 from zerver.lib.notifications import enqueue_welcome_emails
 
-from django.utils.timezone import now as timezone_now
-
 class EmailTranslationTestCase(ZulipTestCase):
     def test_email_translation(self) -> None:
         def check_translation(phrase: str, request_type: str, *args: Any, **kwargs: Any) -> None:

zerver/tests/test_import_export.py

@@ -5,16 +5,13 @@ from django.conf import settings
 import os
 import shutil
 import ujson
-import io
-from PIL import Image
 
-from mock import patch, MagicMock
+from mock import patch
 from typing import Any, Dict, List, Set, Optional, Tuple, Callable, \
     FrozenSet
 
 from zerver.lib.export import (
     do_export_realm,
-    export_files_from_s3,
     export_usermessages_batch,
     do_export_user,
 )

zerver/tests/test_link_embed.py

@@ -6,7 +6,7 @@ from typing import Any
 from requests.exceptions import ConnectionError
 from django.test import override_settings
 
-from zerver.models import Recipient, Message
+from zerver.models import Message
 from zerver.lib.actions import queue_json_publish
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.test_helpers import MockPythonResponse

zerver/tests/test_logging_handlers.py

@@ -5,21 +5,18 @@ import sys
 
 from django.conf import settings
 from django.contrib.auth.models import AnonymousUser
-from django.http import HttpRequest, HttpResponse
-from django.test import RequestFactory, TestCase
+from django.http import HttpRequest
+from django.test import TestCase
 from django.utils.log import AdminEmailHandler
 from functools import wraps
 from mock import MagicMock, patch
 from mypy_extensions import NoReturn
-from typing import Any, Callable, Dict, Mapping, Optional, Iterator, Optional, Tuple, Type
+from typing import Any, Callable, Dict, Iterator, Optional, Tuple, Type
 from types import TracebackType
 
-from zerver.lib.request import JsonableError
 from zerver.lib.types import ViewFuncT
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.logging_handlers import AdminNotifyHandler
-from zerver.middleware import JsonErrorHandler
-from zerver.worker.queue_processors import QueueProcessingWorker
 
 captured_request = None  # type: Optional[HttpRequest]
 captured_exc_info = None  # type: Tuple[Optional[Type[BaseException]], Optional[BaseException], Optional[TracebackType]]

zerver/tests/test_management_commands.py

@@ -3,9 +3,7 @@
 import glob
 import os
 import re
-import email
 from datetime import timedelta
-from email.mime.text import MIMEText
 from email.utils import parseaddr
 from mock import MagicMock, patch, call
 from typing import List, Dict, Any, Optional
@@ -13,7 +11,7 @@ from typing import List, Dict, Any, Optional
 from django.conf import settings
 from django.core.management import call_command
 from django.test import TestCase, override_settings
-from zerver.lib.actions import do_create_user, do_deactivate_realm, do_reactivate_realm
+from zerver.lib.actions import do_create_user
 from zerver.lib.management import ZulipBaseCommand, CommandError, check_config
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.test_helpers import stdout_suppressed

zerver/tests/test_message_edit_notifications.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from typing import Any, Dict, Generator, Mapping, Union
+from typing import Any, Dict, Mapping, Union
 
 import mock
 
@@ -16,7 +16,6 @@ from zerver.lib.test_classes import (
 
 from zerver.models import (
     get_stream_recipient,
-    Recipient,
     Subscription,
     UserPresence,
 )

zerver/tests/test_messages.py

@@ -1,17 +1,15 @@
 # -*- coding: utf-8 -*-
 from django.db import IntegrityError
-from django.db.models import Q, Max
+from django.db.models import Q
 from django.conf import settings
 from django.http import HttpResponse
 from django.test import TestCase, override_settings
 from django.utils.timezone import now as timezone_now
-from django.utils.timezone import utc as timezone_utc
 
 from zerver.lib import bugdown
 from zerver.decorator import JsonableError
 from zerver.lib.test_runner import slow
 from zerver.lib.cache import get_stream_cache_key, cache_delete
-from zerver.lib.message import estimate_recent_messages
 
 from zerver.lib.addressee import Addressee
 
@@ -96,11 +94,10 @@ from zerver.lib.url_encoding import near_message_url
 
 from zerver.views.messages import create_mirrored_message_users
 
-from analytics.lib.counts import CountStat, LoggingCountStat, COUNT_STATS
+from analytics.lib.counts import COUNT_STATS
 from analytics.models import RealmCount
 
 import datetime
-import DNS
 import mock
 import time
 import ujson

zerver/tests/test_middleware.py

@@ -1,6 +1,5 @@
 import time
 
-from django.http import HttpResponse
 from django.test import override_settings
 from unittest.mock import Mock, patch
 from zerver.lib.test_classes import ZulipTestCase

zerver/tests/test_muting.py

@@ -1,19 +1,11 @@
-
-import ujson
-
-from django.http import HttpResponse
-from mock import patch
 from typing import Any, Dict
 
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.stream_topic import StreamTopicTarget
 
 from zerver.models import (
-    get_realm,
     get_stream,
     get_stream_recipient,
-    get_user,
-    Recipient,
     UserProfile,
 )
 

zerver/tests/test_narrow.py

@@ -4,18 +4,17 @@
 from django.db import connection
 from django.test import TestCase, override_settings
 from sqlalchemy.sql import (
-    and_, select, column, table, literal, join, literal_column,
+    and_, select, column, table,
 )
 from sqlalchemy.sql import compiler
 
 from zerver.models import (
-    Realm, Stream, Subscription, UserProfile, Attachment,
-    get_display_recipient, get_personal_recipient, get_realm, get_stream, get_user,
-    Reaction, UserMessage, get_stream_recipient, Message
+    Realm, Subscription,
+    get_display_recipient, get_personal_recipient, get_realm, get_stream,
+    UserMessage, get_stream_recipient, Message
 )
 from zerver.lib.message import (
     MessageDict,
-    get_first_visible_message_id,
 )
 from zerver.lib.narrow import (
     build_narrow_filter,
@@ -46,7 +45,7 @@ from zerver.views.messages import (
     LARGER_THAN_MAX_MESSAGE_ID,
 )
 
-from typing import Dict, List, Mapping, Sequence, Tuple, Generic, Union, Any, Optional
+from typing import Dict, List, Sequence, Tuple, Union, Any, Optional
 import mock
 import os
 import re

zerver/tests/test_new_users.py

@@ -1,7 +1,6 @@
 import datetime
 from django.conf import settings
 from django.core import mail
-from django.contrib.auth.signals import user_logged_in
 from django.test import override_settings
 
 from zerver.lib.test_classes import ZulipTestCase

zerver/tests/test_notifications.py

@@ -1,5 +1,3 @@
-
-import os
 import random
 import re
 import ujson
@@ -7,29 +5,24 @@ import ldap
 
 from django.conf import settings
 from django.core import mail
-from django.http import HttpResponse
 from django.test import override_settings
 from django_auth_ldap.config import LDAPSearch
 from email.utils import formataddr
 from mock import patch, MagicMock
-from typing import Any, Dict, List, Optional
+from typing import List, Optional
 
 from zerver.lib.notifications import fix_emojis, handle_missedmessage_emails, \
     enqueue_welcome_emails, relative_to_full_url
-from zerver.lib.actions import do_update_message, do_change_notification_settings
-from zerver.lib.message import access_message
+from zerver.lib.actions import do_change_notification_settings
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.send_email import FromAddress
 from zerver.lib.test_helpers import MockLDAP
 from zerver.models import (
     get_realm,
     get_stream,
-    Recipient,
-    UserMessage,
     UserProfile,
     ScheduledEmail
 )
-from zerver.lib.test_helpers import get_test_image_file
 
 class TestFollowupEmails(ZulipTestCase):
     def test_day1_email_context(self) -> None:

zerver/tests/test_outgoing_webhook_system.py

@@ -5,10 +5,7 @@ import logging
 import mock
 import requests
 
-from builtins import object
-from django.test import override_settings
-from requests import Response
-from typing import Any, Dict, Tuple, Optional
+from typing import Any, Optional
 
 from zerver.lib.outgoing_webhook import (
     do_rest_call,

zerver/tests/test_presence.py

@@ -1,8 +1,6 @@
 # -*- coding: utf-8 -*-
 
 from datetime import timedelta
-from django.http import HttpResponse
-from django.test import override_settings
 from django.utils.timezone import now as timezone_now
 import mock
 

zerver/tests/test_push_notifications.py

@@ -5,28 +5,24 @@ import itertools
 import requests
 import mock
 from mock import call
-import time
-from typing import Any, Dict, List, Optional, Union, SupportsInt
+from typing import Any, Dict, List, Optional
 
 import base64
 import gcm
-import json
 import os
 import ujson
 import uuid
 
-from django.test import TestCase, override_settings
+from django.test import override_settings
 from django.conf import settings
 from django.http import HttpResponse
 from django.utils.crypto import get_random_string
-from django.utils.timezone import now as timezone_now
 from django.utils.timezone import utc as timezone_utc
 
 from analytics.lib.counts import CountStat, LoggingCountStat
 from analytics.models import InstallationCount, RealmCount
 from zerver.models import (
     PushDeviceToken,
-    UserProfile,
     Message,
     UserMessage,
     receives_offline_email_notifications,
@@ -47,7 +43,6 @@ from zerver.lib.push_notifications import get_mobile_push_content, \
 from zerver.lib.remote_server import send_analytics_to_remote_server, \
     build_analytics_data, PushNotificationBouncerException
 from zerver.lib.request import JsonableError
-from zerver.lib.response import json_success
 from zerver.lib.test_classes import (
     ZulipTestCase,
 )
@@ -877,7 +872,6 @@ class TestAPNs(PushNotificationTest):
                     self.user_profile.id, device.token)
 
     def test_http_retry_pipefail(self) -> None:
-        import hyper
         with self.mock_apns() as mock_apns, \
                 mock.patch('zerver.lib.push_notifications.logger') as mock_logging:
             mock_apns.get_notification_result.side_effect = itertools.chain(

zerver/tests/test_queue.py

@@ -1,13 +1,11 @@
 import mock
-import os
 from typing import Any, Dict
-import ujson
 
 from django.test import override_settings
 from pika.exceptions import ConnectionClosed, AMQPConnectionError
 
 from zerver.lib.queue import TornadoQueueClient, queue_json_publish, \
-    get_queue_client, SimpleQueueClient
+    get_queue_client
 from zerver.lib.test_classes import ZulipTestCase
 
 class TestTornadoQueueClient(ZulipTestCase):

zerver/tests/test_queue_worker.py

@@ -5,8 +5,7 @@ import ujson
 import smtplib
 
 from django.conf import settings
-from django.http import HttpResponse
-from django.test import TestCase, override_settings
+from django.test import override_settings
 from mock import patch, MagicMock
 from typing import Any, Callable, Dict, List, Mapping, Tuple
 

zerver/tests/test_reactions.py

@@ -7,10 +7,9 @@ from unittest import mock
 
 from zerver.lib.emoji import emoji_name_to_emoji_code
 from zerver.lib.request import JsonableError
-from zerver.lib.test_helpers import tornado_redirected_to_list, \
-    get_test_image_file
+from zerver.lib.test_helpers import tornado_redirected_to_list
 from zerver.lib.test_classes import ZulipTestCase
-from zerver.models import get_realm, Message, Reaction, RealmEmoji, Recipient, UserMessage
+from zerver.models import get_realm, Message, Reaction, RealmEmoji, UserMessage
 
 class ReactionEmojiTest(ZulipTestCase):
     def test_missing_emoji(self) -> None:

zerver/tests/test_realm.py

@@ -6,10 +6,7 @@ import mock
 from email.utils import parseaddr
 
 from django.conf import settings
-from django.http import HttpResponse
-from django.conf import settings
-from mock import patch
-from typing import Any, Dict, List, Union, Mapping
+from typing import Any, Dict, List, Mapping
 
 from zerver.lib.actions import (
     do_change_is_admin,

zerver/tests/test_realm_domains.py

@@ -2,7 +2,6 @@
 
 from django.core.exceptions import ValidationError
 from django.db.utils import IntegrityError
-from typing import Optional
 
 from zerver.lib.actions import do_change_is_admin, \
     do_change_realm_domain, do_create_realm, \

zerver/tests/test_realm_emoji.py

@@ -3,9 +3,9 @@
 import mock
 
 from zerver.lib.actions import do_create_realm, do_create_user, \
-    do_remove_realm_emoji, get_realm, check_add_realm_emoji
+    get_realm, check_add_realm_emoji
 from zerver.lib.test_classes import ZulipTestCase
-from zerver.lib.test_helpers import get_test_image_file, get_user
+from zerver.lib.test_helpers import get_test_image_file
 from zerver.models import Realm, RealmEmoji, UserProfile
 
 class RealmEmojiTest(ZulipTestCase):

zerver/tests/test_report.py

@@ -10,7 +10,6 @@ from zerver.lib.utils import statsd
 
 import mock
 import ujson
-import os
 
 def fix_params(raw_params: Dict[str, Any]) -> Dict[str, str]:
     # A few of our few legacy endpoints need their

zerver/tests/test_retention.py

@@ -5,7 +5,7 @@ from datetime import datetime, timedelta
 from django.utils.timezone import now as timezone_now
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.upload import create_attachment
-from zerver.models import Message, Realm, Recipient, UserProfile, UserMessage, ArchivedUserMessage, \
+from zerver.models import Message, Realm, UserMessage, ArchivedUserMessage, \
     ArchivedMessage, Attachment, ArchivedAttachment
 from zerver.lib.retention import get_expired_messages, move_messages_to_archive
 

zerver/tests/test_service_bot_system.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 
-import json
 import mock
 from typing import Any, Union, Mapping, Callable
 
@@ -18,7 +17,6 @@ from zerver.lib.bot_config import set_bot_config, ConfigError, load_bot_config_t
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.models import (
     get_realm,
-    BotStorageData,
     UserProfile,
     Recipient,
 )

zerver/tests/test_sessions.py

@@ -10,7 +10,7 @@ from zerver.lib.sessions import (
 )
 
 from zerver.models import (
-    UserProfile, get_user_profile_by_id, get_realm, Realm
+    get_realm, Realm
 )
 
 from zerver.lib.test_classes import ZulipTestCase

zerver/tests/test_settings.py

@@ -11,7 +11,7 @@ from zerver.lib.sessions import get_session_dict_user
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.test_helpers import MockLDAP
 from zerver.lib.users import get_all_api_keys
-from zerver.models import get_realm, get_user, UserProfile, \
+from zerver.models import get_realm, UserProfile, \
     get_user_profile_by_api_key
 
 class ChangeSettingsTest(ZulipTestCase):

zerver/tests/test_signup.py

@@ -1,19 +1,16 @@
 # -*- coding: utf-8 -*-
 import datetime
 from email.utils import parseaddr
-import re
 
-import django_otp
 from django.conf import settings
 from django.contrib.contenttypes.models import ContentType
-from django.http import HttpResponse, HttpRequest
+from django.http import HttpResponse
 from django.test import TestCase, override_settings
 from django.utils.timezone import now as timezone_now
 from django.core.exceptions import ValidationError
-from two_factor.utils import default_device
 
 from mock import patch, MagicMock
-from zerver.lib.test_helpers import MockLDAP, get_test_image_file, avatar_disk_path
+from zerver.lib.test_helpers import get_test_image_file, avatar_disk_path
 
 from confirmation.models import Confirmation, create_confirmation_link, MultiuseInvite, \
     generate_key, confirmation_url, get_object_from_key, ConfirmationKeyException, \
@@ -21,19 +18,17 @@ from confirmation.models import Confirmation, create_confirmation_link, Multiuse
 from confirmation import settings as confirmation_settings
 
 from zerver.forms import HomepageForm, WRONG_SUBDOMAIN_ERROR, check_subdomain_available
-from zerver.lib.actions import do_change_password, get_default_streams_for_realm
-from zerver.lib.exceptions import CannotDeactivateLastUserError
+from zerver.lib.actions import get_default_streams_for_realm
 from zerver.lib.dev_ldap_directory import init_fakeldap
 from zerver.decorator import do_two_factor_login
-from zerver.views.auth import login_or_register_remote_user, \
+from zerver.views.auth import \
     redirect_and_log_into_subdomain, start_two_factor_auth
 from zerver.views.invite import get_invitee_emails_set
-from zerver.views.registration import send_confirm_registration_email
 from zerver.views.development.registration import confirmation_key
 
 from zerver.models import (
     get_realm, get_user, get_stream_recipient, get_realm_stream,
-    PreregistrationUser, Realm, RealmDomain, Recipient, Message,
+    PreregistrationUser, Realm, Recipient, Message,
     ScheduledEmail, UserProfile, UserMessage,
     Stream, Subscription, flush_per_request_caches
 )
@@ -41,7 +36,6 @@ from zerver.lib.actions import (
     set_default_streams,
     do_change_is_admin,
     get_stream,
-    do_create_realm,
     do_create_default_stream_group,
     do_add_default_stream,
 )
@@ -53,7 +47,6 @@ from zerver.lib.actions import (
     do_set_realm_property,
     add_new_user_history,
 )
-from zerver.lib.avatar import avatar_url
 from zerver.lib.mobile_auth_otp import xor_hex_strings, ascii_to_hex, \
     otp_encrypt_api_key, is_valid_otp, hex_to_ascii, otp_decrypt_api_key
 from zerver.lib.notifications import enqueue_welcome_emails, \
@@ -65,20 +58,17 @@ from zerver.lib.test_helpers import find_key_by_email, queries_captured, \
 from zerver.lib.test_classes import (
     ZulipTestCase,
 )
-from zerver.lib.test_runner import slow
 from zerver.lib.sessions import get_session_dict_user
 from zerver.lib.name_restrictions import is_disposable_domain
 from zerver.context_processors import common_context
 
-from collections import defaultdict
 import re
 import smtplib
 import ujson
 
-from typing import Any, Dict, List, Optional, Set
+from typing import Any, Dict, List, Optional
 
 import urllib
-import os
 import pytz
 
 class RedirectAndLogIntoSubdomainTestCase(ZulipTestCase):

zerver/tests/test_slack_importer.py

@@ -5,9 +5,6 @@ from django.utils.timezone import now as timezone_now
 from zerver.data_import.slack import (
     rm_tree,
     get_slack_api_data,
-    get_user_email,
-    build_avatar_url,
-    build_avatar,
     get_admin,
     get_user_timezone,
     users_to_zerver_userprofile,
@@ -18,7 +15,6 @@ from zerver.data_import.slack import (
     channel_message_to_zerver_message,
     convert_slack_workspace_messages,
     do_convert_data,
-    process_avatars,
     process_message_files,
     AddedChannelsT,
     ZerverFieldsT,
@@ -36,9 +32,6 @@ from zerver.data_import.sequencer import (
 from zerver.lib.import_realm import (
     do_import_realm,
 )
-from zerver.lib.avatar_hash import (
-    user_avatar_path_from_ids,
-)
 from zerver.lib.test_classes import (
     ZulipTestCase,
 )
@@ -51,16 +44,13 @@ from zerver.models import (
     RealmAuditLog,
     Recipient,
 )
-from zerver.lib import mdiff
 
 import ujson
-import json
 import logging
 import shutil
-import requests
 import os
 import mock
-from typing import Any, AnyStr, Dict, List, Optional, Set, Tuple, Iterator
+from typing import Any, Dict, List, Set, Tuple, Iterator
 
 def remove_folder(path: str) -> None:
     if os.path.exists(path):

zerver/tests/test_slack_message_conversion.py

@@ -1,6 +1,4 @@
 # -*- coding: utf-8 -*-
-from django.conf import settings
-
 from zerver.data_import.slack_message_conversion import (
     convert_to_zulip_markdown,
     get_user_full_name
@@ -13,7 +11,7 @@ from zerver.lib import mdiff
 import ujson
 
 import os
-from typing import Any, AnyStr, Dict, List, Optional, Set, Tuple
+from typing import Any, Dict, List, Tuple
 
 class SlackMessageConversion(ZulipTestCase):
     def assertEqual(self, first: Any, second: Any, msg: str="") -> None:

zerver/tests/test_soft_deactivation.py

@@ -10,7 +10,7 @@ from zerver.lib.soft_deactivation import (
 )
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.models import (
-    Client, UserProfile, UserActivity, get_realm, Recipient
+    Client, UserProfile, UserActivity, get_realm,
 )
 
 class UserSoftDeactivationTests(ZulipTestCase):

zerver/tests/test_subdomains.py

@@ -2,7 +2,7 @@
 import mock
 from typing import Any, Dict, List
 
-from django.test import TestCase, override_settings
+from django.test import TestCase
 
 from zerver.lib.subdomains import get_subdomain
 from zerver.models import Realm

zerver/tests/test_subs.py

@@ -1,11 +1,10 @@
 # -*- coding: utf-8 -*-
 
-from typing import Any, Dict, List, Mapping, Optional, Sequence, Set
+from typing import Any, Dict, List, Mapping, Optional, Set
 
 from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.http import HttpRequest, HttpResponse
-from django.test import override_settings
 from django.utils.timezone import now as timezone_now
 
 from zerver.lib import cache
@@ -42,7 +41,7 @@ from zerver.lib.test_runner import (
 )
 
 from zerver.models import (
-    get_display_recipient, Message, Realm, Recipient, Stream, Subscription,
+    Realm, Recipient, Stream, Subscription,
     DefaultStream, UserProfile, get_user_profile_by_id, active_non_guest_user_ids,
     get_default_stream_groups, flush_per_request_caches, DefaultStreamGroup,
     get_client, get_user
@@ -53,7 +52,7 @@ from zerver.lib.actions import (
     do_create_realm, do_remove_default_stream, bulk_get_subscriber_user_ids,
     gather_subscriptions_helper, bulk_add_subscriptions, bulk_remove_subscriptions,
     gather_subscriptions, get_default_streams_for_realm, get_realm, get_stream,
-    set_default_streams, check_stream_name, do_get_streams,
+    set_default_streams, do_get_streams,
     create_stream_if_needed, create_streams_if_needed,
     ensure_stream,
     do_deactivate_stream,
@@ -64,7 +63,6 @@ from zerver.lib.actions import (
     do_remove_default_stream_group,
     do_change_default_stream_group_description,
     do_change_default_stream_group_name,
-    do_rename_stream,
     lookup_default_stream_groups,
     can_access_stream_user_ids,
     validate_user_access_to_subscribers_helper,
@@ -81,12 +79,10 @@ from zerver.lib.message import (
 )
 from zerver.lib.stream_recipient import StreamRecipientMap
 
-from django.http import HttpResponse
 from datetime import timedelta
 import mock
 import random
 import ujson
-import urllib
 
 class TestMiscStuff(ZulipTestCase):
     def test_empty_results(self) -> None:

zerver/tests/test_templates.py

@@ -5,9 +5,7 @@ import re
 from typing import Any, Dict, Iterable
 import logging
 
-from django.conf import settings
 from django.test import override_settings
-from django.template import Template, Context
 from django.template.loader import get_template
 from django.test.client import RequestFactory
 
@@ -17,7 +15,6 @@ from zerver.lib.test_classes import (
     ZulipTestCase,
 )
 from zerver.lib.test_runner import slow
-from zerver.context_processors import common_context
 
 
 class get_form_value:

zerver/tests/test_thumbnail.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 from django.conf import settings
 
-from zerver.lib.test_classes import ZulipTestCase, UploadSerializeMixin
+from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.test_helpers import (
     use_s3_backend,
     create_s3_buckets,

zerver/tests/test_timestamp.py

@@ -3,10 +3,10 @@ from django.utils.timezone import utc as timezone_utc
 
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.timestamp import floor_to_hour, floor_to_day, ceiling_to_hour, \
-    ceiling_to_day, timestamp_to_datetime, datetime_to_timestamp, \
+    timestamp_to_datetime, datetime_to_timestamp, \
     TimezoneNotUTCException, convert_to_UTC
 
-from datetime import datetime, timedelta
+from datetime import timedelta
 from dateutil import parser
 import pytz
 

zerver/tests/test_tutorial.py

@@ -2,9 +2,8 @@
 
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.test_helpers import message_stream_count, most_recent_message
-from zerver.models import get_realm, get_user, Recipient, UserProfile
+from zerver.models import get_realm, get_user, UserProfile
 
-from typing import Any, Dict
 import ujson
 
 class TutorialTests(ZulipTestCase):

zerver/tests/test_typing.py

@@ -10,7 +10,7 @@ from zerver.lib.test_helpers import tornado_redirected_to_list
 from zerver.lib.test_classes import (
     ZulipTestCase,
 )
-from zerver.models import get_realm, get_user, get_display_recipient
+from zerver.models import get_display_recipient
 
 class TypingNotificationOperatorTest(ZulipTestCase):
     def test_missing_parameter(self) -> None:

zerver/tests/test_unread.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-AA
 
-from typing import Any, Dict, List, Mapping
+from typing import Any, List, Mapping
 
 from django.db import connection
 from django.test import override_settings
@@ -10,8 +10,6 @@ from zerver.models import (
     get_stream,
     get_stream_recipient,
     get_user,
-    Recipient,
-    Stream,
     Subscription,
     UserMessage,
     UserProfile,

zerver/tests/test_upload.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from django.conf import settings
 from django.test import TestCase
-from unittest import skip
 from unittest.mock import patch
 
 from zerver.lib.avatar import (
@@ -16,12 +15,10 @@ from zerver.lib.test_classes import ZulipTestCase, UploadSerializeMixin
 from zerver.lib.test_helpers import (
     avatar_disk_path,
     get_test_image_file,
-    POSTRequestMock,
     use_s3_backend,
     create_s3_buckets,
     queries_captured,
 )
-from zerver.lib.test_runner import slow
 from zerver.lib.upload import sanitize_name, S3UploadBackend, \
     upload_message_file, upload_emoji_image, delete_message_image, LocalUploadBackend, \
     ZulipUploadBackend, MEDIUM_AVATAR_SIZE, resize_avatar, \
@@ -30,7 +27,7 @@ from zerver.lib.upload import sanitize_name, S3UploadBackend, \
     exif_rotate
 import zerver.lib.upload
 from zerver.models import Attachment, get_user, \
-    get_old_unclaimed_attachments, Message, UserProfile, Stream, Realm, \
+    Message, UserProfile, Realm, \
     RealmDomain, RealmEmoji, get_realm, get_system_bot, \
     validate_attachment_request
 from zerver.lib.actions import (
@@ -39,14 +36,12 @@ from zerver.lib.actions import (
     internal_send_private_message,
 )
 from zerver.lib.create_user import copy_user_settings
-from zerver.lib.request import JsonableError
 from zerver.lib.users import get_api_key
-from zerver.views.upload import upload_file_backend, serve_local
+from zerver.views.upload import upload_file_backend
 
 import urllib
 from PIL import Image
 
-from boto.s3.key import Key
 from io import StringIO
 import mock
 import os
@@ -54,15 +49,9 @@ import io
 import shutil
 import re
 import datetime
-import requests
-import base64
-from datetime import timedelta
-from django.http import HttpRequest
 from django.utils.timezone import now as timezone_now
 from sendfile import _get_sendfile
 
-from typing import Any, Callable
-
 def destroy_uploads() -> None:
     if os.path.exists(settings.LOCAL_UPLOADS_DIR):
         shutil.rmtree(settings.LOCAL_UPLOADS_DIR)

zerver/tests/test_user_groups.py

@@ -1,8 +1,5 @@
 # -*- coding: utf-8 -*-
-from typing import Any, List, Optional
-
 import ujson
-import django
 import mock
 
 from zerver.lib.actions import (
@@ -22,7 +19,7 @@ from zerver.lib.user_groups import (
     get_memberships_of_users,
     user_groups_in_realm_serialized,
 )
-from zerver.models import UserProfile, UserGroup, get_realm, Realm, \
+from zerver.models import UserGroup, get_realm, Realm, \
     UserGroupMembership
 
 class UserGroupTestCase(ZulipTestCase):

zerver/tests/test_users.py

@@ -3,29 +3,23 @@
 from typing import (Any, Dict, Iterable, List, Mapping,
                     Optional, TypeVar, Union)
 
-from django.http import HttpResponse
-from django.test import TestCase
-
 from zerver.lib.test_helpers import (
     queries_captured, simulated_empty_cache,
     tornado_redirected_to_list, get_subscription,
-    most_recent_message, make_client, avatar_disk_path,
-    get_test_image_file
+    most_recent_message,
 )
 from zerver.lib.test_classes import (
     ZulipTestCase,
 )
-from zerver.lib.test_runner import slow
 
 from zerver.models import UserProfile, Recipient, \
-    Realm, RealmDomain, UserActivity, UserHotspot, \
-    get_user, get_realm, get_client, get_stream, get_stream_recipient, \
-    get_source_profile, Message, get_context_for_message, \
-    ScheduledEmail, check_valid_user_ids, get_user, \
+    RealmDomain, UserHotspot, \
+    get_user, get_realm, get_stream, get_stream_recipient, \
+    get_source_profile, \
+    ScheduledEmail, check_valid_user_ids, \
     get_user_by_id_in_realm_including_cross_realm, CustomProfileField
 
 from zerver.lib.avatar import avatar_url
-from zerver.lib.email_mirror import create_missed_message_address
 from zerver.lib.exceptions import JsonableError
 from zerver.lib.send_email import send_future_email
 from zerver.lib.actions import (
@@ -34,7 +28,6 @@ from zerver.lib.actions import (
     do_deactivate_user,
     do_reactivate_user,
     do_change_is_admin,
-    do_change_is_guest,
     do_create_user,
 )
 from zerver.lib.create_user import copy_user_settings
@@ -43,13 +36,8 @@ from zerver.lib.stream_topic import StreamTopicTarget
 from zerver.lib.users import user_ids_to_users, access_user_by_id, \
     get_accounts_for_email
 
-from django.conf import settings
-
 import datetime
 import mock
-import os
-import sys
-import time
 import ujson
 
 K = TypeVar('K')

zerver/tests/test_zephyr.py

@@ -3,7 +3,7 @@ import ujson
 
 from django.http import HttpResponse
 from mock import patch
-from typing import Any, Dict
+from typing import Any
 
 from zerver.lib.test_classes import ZulipTestCase
 from zerver.lib.users import get_api_key