Fix QuerySharedUsers for the SyncAPI keychange consumer (#2554)

* Make more use of base.BaseDendrite

* Fix QuerySharedUsers if no UserIDs are supplied

roomserver/roomserver_test.go

@@ -0,0 +1,69 @@
+package roomserver_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/matrix-org/dendrite/roomserver"
+	"github.com/matrix-org/dendrite/roomserver/api"
+	"github.com/matrix-org/dendrite/roomserver/storage"
+	"github.com/matrix-org/dendrite/setup/base"
+	"github.com/matrix-org/dendrite/test"
+	"github.com/matrix-org/dendrite/test/testrig"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+func mustCreateDatabase(t *testing.T, dbType test.DBType) (*base.BaseDendrite, storage.Database, func()) {
+	base, close := testrig.CreateBaseDendrite(t, dbType)
+	db, err := storage.Open(base, &base.Cfg.KeyServer.Database, base.Caches)
+	if err != nil {
+		t.Fatalf("failed to create Database: %v", err)
+	}
+	return base, db, close
+}
+
+func Test_SharedUsers(t *testing.T) {
+	alice := test.NewUser(t)
+	bob := test.NewUser(t)
+	room := test.NewRoom(t, alice, test.RoomPreset(test.PresetTrustedPrivateChat))
+
+	// Invite and join Bob
+	room.CreateAndInsert(t, alice, gomatrixserverlib.MRoomMember, map[string]interface{}{
+		"membership": "invite",
+	}, test.WithStateKey(bob.ID))
+	room.CreateAndInsert(t, bob, gomatrixserverlib.MRoomMember, map[string]interface{}{
+		"membership": "join",
+	}, test.WithStateKey(bob.ID))
+
+	ctx := context.Background()
+	test.WithAllDatabases(t, func(t *testing.T, dbType test.DBType) {
+		base, _, close := mustCreateDatabase(t, dbType)
+		defer close()
+
+		rsAPI := roomserver.NewInternalAPI(base)
+		// SetFederationAPI starts the room event input consumer
+		rsAPI.SetFederationAPI(nil, nil)
+		// Create the room
+		if err := api.SendEvents(ctx, rsAPI, api.KindNew, room.Events(), "test", "test", nil, false); err != nil {
+			t.Fatalf("failed to send events: %v", err)
+		}
+
+		// Query the shared users for Alice, there should only be Bob.
+		// This is used by the SyncAPI keychange consumer.
+		res := &api.QuerySharedUsersResponse{}
+		if err := rsAPI.QuerySharedUsers(ctx, &api.QuerySharedUsersRequest{UserID: alice.ID}, res); err != nil {
+			t.Fatalf("unable to query known users: %v", err)
+		}
+		if _, ok := res.UserIDsToCount[bob.ID]; !ok {
+			t.Fatalf("expected to find %s in shared users, but didn't: %+v", bob.ID, res.UserIDsToCount)
+		}
+		// Also verify that we get the expected result when specifying OtherUserIDs.
+		// This is used by the SyncAPI when getting device list changes.
+		if err := rsAPI.QuerySharedUsers(ctx, &api.QuerySharedUsersRequest{UserID: alice.ID, OtherUserIDs: []string{bob.ID}}, res); err != nil {
+			t.Fatalf("unable to query known users: %v", err)
+		}
+		if _, ok := res.UserIDsToCount[bob.ID]; !ok {
+			t.Fatalf("expected to find %s in shared users, but didn't: %+v", bob.ID, res.UserIDsToCount)
+		}
+	})
+}