Tests: replace mocked Authenticator with the real thing (#11913)

If we prepopulate the test homeserver with a key for a remote homeserver, we
can make federation requests to it without having to stub out the
authenticator. This has two advantages:

 * means that what we are testing is closer to reality (ie, we now have
   complete tests for the incoming-request-authorisation flow)

 * some tests require that other objects be signed by the remote server (eg,
   the event in `/send_join`), and doing that would require a whole separate
   set of mocking out. It's much simpler just to use real keys.

1 files changed, 2 insertions, 4 deletions

diff --git a/tests/rest/client/test_third_party_rules.py b/tests/rest/client/test_third_party_rules.py
index 4e71b6ec12..ac6b86ff6b 100644
--- a/tests/rest/client/test_third_party_rules.py
+++ b/tests/rest/client/test_third_party_rules.py
@@ -107,6 +107,7 @@ class ThirdPartyRulesTestCase(unittest.FederatingHomeserverTestCase):
         return hs
 
     def prepare(self, reactor, clock, homeserver):
+        super().prepare(reactor, clock, homeserver)
         # Create some users and a room to play with during the tests
         self.user_id = self.register_user("kermit", "monkey")
         self.invitee = self.register_user("invitee", "hackme")
@@ -473,8 +474,6 @@ class ThirdPartyRulesTestCase(unittest.FederatingHomeserverTestCase):
     def _send_event_over_federation(self) -> None:
         """Send a dummy event over federation and check that the request succeeds."""
         body = {
-            "origin": self.hs.config.server.server_name,
-            "origin_server_ts": self.clock.time_msec(),
             "pdus": [
                 {
                     "sender": self.user_id,
@@ -492,11 +491,10 @@ class ThirdPartyRulesTestCase(unittest.FederatingHomeserverTestCase):
             ],
         }
 
-        channel = self.make_request(
+        channel = self.make_signed_federation_request(
             method="PUT",
             path="/_matrix/federation/v1/send/1",
             content=body,
-            federation_auth_origin=self.hs.config.server.server_name.encode("utf8"),
         )
 
         self.assertEqual(channel.code, 200, channel.result)