Implementation of HTTP 307 response for MSC3886 POST endpoint (#14018)

Co-authored-by: reivilibre <olivier@librepush.net>
Co-authored-by: Andrew Morgan <andrewm@element.io>

tests/rest/client/test_rendezvous.py

@@ -0,0 +1,45 @@
+# Copyright 2022 The Matrix.org Foundation C.I.C.
+#
+# 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.
+
+from twisted.test.proto_helpers import MemoryReactor
+
+from synapse.rest.client import rendezvous
+from synapse.server import HomeServer
+from synapse.util import Clock
+
+from tests import unittest
+from tests.unittest import override_config
+
+endpoint = "/_matrix/client/unstable/org.matrix.msc3886/rendezvous"
+
+
+class RendezvousServletTestCase(unittest.HomeserverTestCase):
+
+    servlets = [
+        rendezvous.register_servlets,
+    ]
+
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
+        self.hs = self.setup_test_homeserver()
+        return self.hs
+
+    def test_disabled(self) -> None:
+        channel = self.make_request("POST", endpoint, {}, access_token=None)
+        self.assertEqual(channel.code, 400)
+
+    @override_config({"experimental_features": {"msc3886_endpoint": "/asd"}})
+    def test_redirect(self) -> None:
+        channel = self.make_request("POST", endpoint, {}, access_token=None)
+        self.assertEqual(channel.code, 307)
+        self.assertEqual(channel.headers.getRawHeaders("Location"), ["/asd"])