delete keys when deleting backups

tests/storage/test_e2e_room_keys.py

@@ -0,0 +1,76 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 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.internet import defer
+
+from tests import unittest, utils
+
+# sample room_key data for use in the tests
+room_key = {
+    "first_message_index": 1,
+    "forwarded_count": 1,
+    "is_verified": False,
+    "session_data": "SSBBTSBBIEZJU0gK",
+}
+
+
+class E2eRoomKeysHandlerTestCase(unittest.TestCase):
+    def __init__(self, *args, **kwargs):
+        super(E2eRoomKeysHandlerTestCase, self).__init__(*args, **kwargs)
+        self.hs = None  # type: synapse.server.HomeServer
+        self.store = None  # type: synapse.storage.DataStore
+
+    @defer.inlineCallbacks
+    def setUp(self):
+        hs = yield utils.setup_test_homeserver(self.addCleanup)
+
+        self.store = hs.get_datastore()
+
+    @defer.inlineCallbacks
+    def test_room_keys_version_delete(self):
+        # test that deleting a room key backup deletes the keys
+        version1 = yield self.store.create_e2e_room_keys_version(
+            "user_id", {"algorithm": "rot13", "auth_data": {}}
+        )
+
+        yield self.store.set_e2e_room_key(
+            "user_id", version1, "room", "session", room_key
+        )
+
+        version2 = yield self.store.create_e2e_room_keys_version(
+            "user_id", {"algorithm": "rot13", "auth_data": {}}
+        )
+
+        yield self.store.set_e2e_room_key(
+            "user_id", version2, "room", "session", room_key
+        )
+
+        # make sure the keys were stored properly
+        keys = yield self.store.get_e2e_room_keys("user_id", version1)
+        self.assertEqual(len(keys["rooms"]), 1)
+
+        keys = yield self.store.get_e2e_room_keys("user_id", version2)
+        self.assertEqual(len(keys["rooms"]), 1)
+
+        # delete version1
+        yield self.store.delete_e2e_room_keys_version("user_id", version1)
+
+        # make sure the key from version1 is gone, and the key from version2 is
+        # still there
+        keys = yield self.store.get_e2e_room_keys("user_id", version1)
+        self.assertEqual(len(keys["rooms"]), 0)
+
+        keys = yield self.store.get_e2e_room_keys("user_id", version2)
+        self.assertEqual(len(keys["rooms"]), 1)