Add TestNotificationClientDupeOTKUpload

This currently fails when used in single process mode.

internal/api/rust/rust.go

@@ -49,6 +49,7 @@ type RustRoomInfo struct {
 
 type RustClient struct {
 	FFIClient             *matrix_sdk_ffi.Client
+	syncService           *matrix_sdk_ffi.SyncService
 	roomsListener         *RoomsListener
 	allRooms              *matrix_sdk_ffi.RoomList
 	rooms                 map[string]*RustRoomInfo
@@ -57,7 +58,7 @@ type RustClient struct {
 	persistentStoragePath string
 	opts                  api.ClientCreationOpts
 
-	// for NSE tests
+	// for push notification tests (single/multi-process)
 	notifClient *matrix_sdk_ffi.NotificationClient
 }
 
@@ -132,9 +133,14 @@ func (c *RustClient) Opts() api.ClientCreationOpts {
 
 func (c *RustClient) GetNotification(t ct.TestLike, roomID, eventID string) (*api.Notification, error) {
 	if c.notifClient == nil {
-		t.Errorf("RustClient misconfigured. You can only call GetNotification if this is an NSE process. " +
-			"Ensure opts.EnableCrossProcessRefreshLockProcessName and opts.AccessToken are set!")
-		return nil, fmt.Errorf("misconfigured rust client")
+		var err error
+		c.Logf(t, "creating NotificationClient")
+		c.notifClient, err = c.FFIClient.NotificationClient(matrix_sdk_ffi.NotificationProcessSetupSingleProcess{
+			SyncService: c.syncService,
+		})
+		if err != nil {
+			return nil, fmt.Errorf("GetNotification: failed to create NotificationClient: %s", err)
+		}
 	}
 	notifItem, err := c.notifClient.GetNotification(roomID, eventID)
 	if err != nil {
@@ -350,6 +356,7 @@ func (c *RustClient) StartSyncing(t ct.TestLike) (stopSyncing func(), err error)
 	}
 	go syncService.Start()
 	c.allRooms = roomList
+	c.syncService = syncService
 	// track new rooms when they are made
 	allRoomsListener := newGenericStateListener[[]matrix_sdk_ffi.RoomListEntriesUpdate]()
 	go func() {

tests/notification_test.go

@@ -3,7 +3,6 @@ package tests
 import (
 	"fmt"
 	"math/rand"
-	"sync"
 	"testing"
 	"time"
 
@@ -535,35 +534,42 @@ func TestMultiprocessNSEOlmSessionWedge(t *testing.T) {
 	})
 }
 
-func TestMultiprocessDupeOTKUpload(t *testing.T) {
+// Test that the notification client doesn't cause duplicate OTK uploads.
+// Regression test for https://github.com/matrix-org/matrix-rust-sdk/issues/1415
+//
+// This test creates a normal Alice rust client and lets it upload OTKs. It then:
+//   - hooks into /keys/upload requests and artificially delays them by adding 4s of latency
+//   - creates a Bob client who sends a message to Alice, consuming 1 OTK in the process
+//   - immediately calls GetNotification on Bob's event as soon as it 200 OKs, which creates
+//     a NotificationClient inside the same process.
+//
+// This means there are 2 sync loops: the main Client and the NotificationClient. Both clients
+// will see the OTK count being lowered so both may try to upload a new OTK. Because we are
+// delaying upload requests by 4s, this increases the chance of both uploads being in-flight at
+// the same time. If they do not synchronise this operation, they will both try to upload
+// _different keys_ with the _same_ key ID, which causes synapse to HTTP 400 with:
+//
+//	> One time key signed_curve25519:AAAAAAAAADI already exists
+//
+// Which will fail the test.
+func TestNotificationClientDupeOTKUpload(t *testing.T) {
 	if !Instance().ShouldTest(api.ClientTypeRust) {
 		t.Skipf("rust only")
 		return
 	}
-	t.Skipf("skipped until it is no longer flakey")
 	tc, roomID := createAndJoinRoom(t)
 
 	// start the "main" app
 	alice := tc.MustLoginClient(t, &cc.ClientCreationRequest{
 		User: tc.Alice,
 		Opts: api.ClientCreationOpts{
-			PersistentStorage:                        true,
-			EnableCrossProcessRefreshLockProcessName: "main",
+			PersistentStorage: true,
 		},
 	})
+	stopSyncing := alice.MustStartSyncing(t)
+	defer stopSyncing()
 	aliceAccessToken := alice.Opts().AccessToken
 
-	// prep nse process
-	nseAlice := tc.MustCreateClient(t, &cc.ClientCreationRequest{
-		User:         tc.Alice,
-		Multiprocess: true,
-		Opts: api.ClientCreationOpts{
-			PersistentStorage:                        true,
-			EnableCrossProcessRefreshLockProcessName: api.ProcessNameNSE,
-			AccessToken:                              aliceAccessToken,
-		},
-	})
-
 	aliceUploadedNewKeys := false
 	// artificially slow down the HTTP responses, such that we will potentially have 2 in-flight /keys/upload requests
 	// at once. If the NSE and main apps are talking to each other, they should be using the same key ID + key.
@@ -588,35 +594,21 @@ func TestMultiprocessDupeOTKUpload(t *testing.T) {
 			return nil
 		},
 	}, func() {
-		var eventID string
 		// Bob appears and sends a message, causing Bob to claim one of Alice's OTKs.
 		// The main app will see this in /sync and then try to upload another OTK, which we will tarpit.
 		tc.WithClientSyncing(t, &cc.ClientCreationRequest{
 			User: tc.Bob,
 		}, func(bob api.Client) {
-			eventID = bob.SendMessage(t, roomID, "Hello world!")
-		})
-		var wg sync.WaitGroup
-		wg.Add(2)
-		go func() { // nse process
-			defer wg.Done()
-			// wake up NSE process as if it got a push notification. Calling this function
-			// should cause the NSE process to upload a OTK as it would have seen 1 has been used.
-			// The NSE and main app must talk to each other to ensure they use the same key.
-			nseAlice.Logf(t, "GetNotification %s, %s", roomID, eventID)
-			notif, err := nseAlice.GetNotification(t, roomID, eventID)
+			eventID := bob.SendMessage(t, roomID, "Hello world!")
+			// create a NotificationClient in the same process to fetch this "push notification".
+			// It might make the NotificationClient upload a OTK as it would have seen 1 has been used.
+			// The NotificationClient and main Client must talk to each other to ensure they use the same key.
+			alice.Logf(t, "GetNotification %s, %s", roomID, eventID)
+			notif, err := alice.GetNotification(t, roomID, eventID)
 			must.NotError(t, "failed to get notification", err)
 			must.Equal(t, notif.Text, "Hello world!", "failed to decrypt msg body")
 			must.Equal(t, notif.FailedToDecrypt, false, "FailedToDecrypt but we should be able to decrypt")
-		}()
-		go func() { // app process
-			defer wg.Done()
-			stopSyncing := alice.MustStartSyncing(t)
-			// let alice upload new OTK
-			time.Sleep(5 * time.Second)
-			stopSyncing()
-		}()
-		wg.Wait()
+		})
 	})
 	if !aliceUploadedNewKeys {
 		t.Errorf("Alice did not upload new OTKs")