Type hints for tests.appservice (#14990)

* Accept a Sequence of events in synapse.appservice

This avoids some casts/ignores in the tests I'm about to fixup. It seems
that `List[Mock]` is not a subtype of `List[EventBase]`, but
`Sequence[Mock]` is a subtype of `Sequence[EventBase]`. So presumably
`Mock` is considered a subtype of anything, much like `Any`.

* make tests.appservice.test_scheduler pass mypy

* Extra hints in tests.appservice.test_scheduler

* Extra hints in tests.appservice.test_api

* Extra hints in tests.appservice.test_appservice

* Disallow untyped defs

* Changelog

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/appservice/test_api.py b/tests/appservice/test_api.py

index 89ee79396f..9d183b733e 100644
--- a/tests/appservice/test_api.py
+++ b/tests/appservice/test_api.py
@@ -29,7 +29,7 @@ URL = "http://mytestservice"
 
 
 class ApplicationServiceApiTestCase(unittest.HomeserverTestCase):
-    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer):
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
         self.api = hs.get_application_service_api()
         self.service = ApplicationService(
             id="unique_identifier",
@@ -39,7 +39,7 @@ class ApplicationServiceApiTestCase(unittest.HomeserverTestCase):
             hs_token=TOKEN,
         )
 
-    def test_query_3pe_authenticates_token(self):
+    def test_query_3pe_authenticates_token(self) -> None:
         """
         Tests that 3pe queries to the appservice are authenticated
         with the appservice's token.