Rewrite Datastore.get_server_verify_keys

Rewrite this so that it doesn't hammer the database.

1 files changed, 50 insertions, 3 deletions

diff --git a/tests/storage/test_keys.py b/tests/storage/test_keys.py

index 7170ae76c7..6bfaa00fe9 100644
--- a/tests/storage/test_keys.py
+++ b/tests/storage/test_keys.py
@@ -15,6 +15,8 @@
 
 import signedjson.key
 
+from twisted.internet.defer import Deferred
+
 import tests.unittest
 
 KEY_1 = signedjson.key.decode_verify_key_base64(
@@ -35,10 +37,55 @@ class KeyStoreTestCase(tests.unittest.HomeserverTestCase):
         self.get_success(d)
 
         d = store.get_server_verify_keys(
-            "server1", ["ed25519:key1", "ed25519:key2", "ed25519:key3"]
+            [
+                ("server1", "ed25519:key1"),
+                ("server1", "ed25519:key2"),
+                ("server1", "ed25519:key3"),
+            ]
         )
         res = self.get_success(d)
 
+        self.assertEqual(len(res.keys()), 3)
+        self.assertEqual(res[("server1", "ed25519:key1")].version, "key1")
+        self.assertEqual(res[("server1", "ed25519:key2")].version, "key2")
+
+        # non-existent result gives None
+        self.assertIsNone(res[("server1", "ed25519:key3")])
+
+    def test_cache(self):
+        """Check that updates correctly invalidate the cache."""
+
+        store = self.hs.get_datastore()
+
+        key_id_1 = "ed25519:key1"
+        key_id_2 = "ed25519:key2"
+
+        d = store.store_server_verify_key("srv1", "from_server", 0, KEY_1)
+        self.get_success(d)
+        d = store.store_server_verify_key("srv1", "from_server", 0, KEY_2)
+        self.get_success(d)
+
+        d = store.get_server_verify_keys([("srv1", key_id_1), ("srv1", key_id_2)])
+        res = self.get_success(d)
+        self.assertEqual(len(res.keys()), 2)
+        self.assertEqual(res[("srv1", key_id_1)], KEY_1)
+        self.assertEqual(res[("srv1", key_id_2)], KEY_2)
+
+        # we should be able to look up the same thing again without a db hit
+        res = store.get_server_verify_keys([("srv1", key_id_1)])
+        if isinstance(res, Deferred):
+            res = self.successResultOf(res)
+        self.assertEqual(len(res.keys()), 1)
+        self.assertEqual(res[("srv1", key_id_1)], KEY_1)
+
+        new_key_2 = signedjson.key.get_verify_key(
+            signedjson.key.generate_signing_key("key2")
+        )
+        d = store.store_server_verify_key("srv1", "from_server", 10, new_key_2)
+        self.get_success(d)
+
+        d = store.get_server_verify_keys([("srv1", key_id_1), ("srv1", key_id_2)])
+        res = self.get_success(d)
         self.assertEqual(len(res.keys()), 2)
-        self.assertEqual(res["ed25519:key1"].version, "key1")
-        self.assertEqual(res["ed25519:key2"].version, "key2")
+        self.assertEqual(res[("srv1", key_id_1)], KEY_1)
+        self.assertEqual(res[("srv1", key_id_2)], new_key_2)