test: add the start of an integration test for room history sharing

This is only a partial test, since we haven't yet implemented the receiver side
of the history-sharing messages.

testing/matrix-sdk-integration-testing/src/helpers.rs

@@ -16,6 +16,7 @@ use matrix_sdk::{
         RoomId,
     },
     sliding_sync::VersionBuilder,
+    sync::SyncResponse,
     Client, ClientBuilder, Room,
 };
 use once_cell::sync::Lazy;
@@ -185,7 +186,7 @@ impl SyncTokenAwareClient {
         Self { client, token: Arc::new(None.into()) }
     }
 
-    pub async fn sync_once(&self) -> Result<()> {
+    pub async fn sync_once(&self) -> Result<SyncResponse> {
         let mut settings = SyncSettings::default().timeout(Duration::from_secs(1));
 
         let token = { self.token.lock().unwrap().clone() };
@@ -197,9 +198,9 @@ impl SyncTokenAwareClient {
 
         let mut prev_token = self.token.lock().unwrap();
         if prev_token.as_ref() != Some(&response.next_batch) {
-            *prev_token = Some(response.next_batch);
+            *prev_token = Some(response.next_batch.clone());
         }
-        Ok(())
+        Ok(response)
     }
 }
 

testing/matrix-sdk-integration-testing/src/tests/e2ee.rs

@@ -1,4 +1,5 @@
 use std::{
+    future::IntoFuture,
     sync::{Arc, Mutex},
     time::Duration,
 };
@@ -9,7 +10,7 @@ use assert_matches2::assert_let;
 use assign::assign;
 use matrix_sdk::{
     assert_next_eq_with_timeout,
-    crypto::{format_emojis, SasState},
+    crypto::{format_emojis, SasState, UserDevices},
     encryption::{
         backups::BackupState,
         recovery::{Recovery, RecoveryState},
@@ -19,7 +20,10 @@ use matrix_sdk::{
         BackupDownloadStrategy, EncryptionSettings, LocalTrust,
     },
     ruma::{
-        api::client::room::create_room::v3::Request as CreateRoomRequest,
+        api::client::{
+            message::send_message_event,
+            room::create_room::v3::{Request as CreateRoomRequest, RoomPreset},
+        },
         events::{
             key::verification::{request::ToDeviceKeyVerificationRequestEvent, VerificationMethod},
             room::message::{
@@ -27,9 +31,10 @@ use matrix_sdk::{
                 SyncRoomMessageEvent,
             },
             secret_storage::secret::SecretEventContent,
-            GlobalAccountDataEventType, OriginalSyncMessageLikeEvent,
+            GlobalAccountDataEventType, MessageLikeEventType, OriginalSyncMessageLikeEvent,
         },
-        OwnedEventId,
+        serde::Raw,
+        OwnedEventId, TransactionId, UserId,
     },
     timeout::timeout,
     Client,
@@ -39,7 +44,7 @@ use matrix_sdk_ui::{
     sync_service::SyncService,
 };
 use similar_asserts::assert_eq;
-use tracing::{debug, warn};
+use tracing::{debug, info, warn, Instrument};
 
 use crate::helpers::{SyncTokenAwareClient, TestClientBuilder};
 
@@ -1175,3 +1180,129 @@ async fn test_recovery_disabling_deletes_secret_storage_secrets() -> Result<()>
 
     Ok(())
 }
+
+/// When we invite another user to a room with "joined" history visibility, we
+/// share the encryption history.
+#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
+async fn test_history_share_on_invite() -> Result<()> {
+    let alice_span = tracing::info_span!("alice");
+    let bob_span = tracing::info_span!("bob");
+
+    let encryption_settings =
+        EncryptionSettings { auto_enable_cross_signing: true, ..Default::default() };
+
+    let alice = TestClientBuilder::new("alice")
+        .use_sqlite()
+        .encryption_settings(encryption_settings)
+        .build()
+        .await?;
+
+    let sync_service_span = tracing::info_span!(parent: &alice_span, "sync_service");
+    let alice_sync_service = Arc::new(
+        SyncService::builder(alice.clone())
+            .with_parent_span(sync_service_span)
+            .build()
+            .await
+            .expect("Could not build alice sync service"),
+    );
+
+    alice.encryption().wait_for_e2ee_initialization_tasks().await;
+    alice_sync_service.start().await;
+
+    let bob = SyncTokenAwareClient::new(
+        TestClientBuilder::new("bob").encryption_settings(encryption_settings).build().await?,
+    );
+
+    {
+        // Alice and Bob share an encrypted room
+        // TODO: get rid of all of this: history sharing should work even if Bob and
+        //   Alice do not share a room
+        let alice_shared_room = alice
+            .create_room(assign!(CreateRoomRequest::new(), {preset: Some(RoomPreset::PublicChat)}))
+            .await?;
+        let shared_room_id = alice_shared_room.room_id();
+        alice_shared_room.enable_encryption().await?;
+        bob.join_room_by_id(shared_room_id)
+            .instrument(bob_span.clone())
+            .await
+            .expect("Bob should have joined the room");
+
+        // Bob sends a message to trigger another sync from Alice, which causes her to
+        // send out the outgoing requests
+        //
+        // FIXME: this appears to be needed due to a bug in the sliding sync client,
+        //   which means it does not send out outgoing requests caused by a
+        //   /sync response
+        let request = send_message_event::v3::Request::new_raw(
+            shared_room_id.to_owned(),
+            TransactionId::new(),
+            MessageLikeEventType::Message,
+            Raw::new(&RoomMessageEventContent::text_plain("")).unwrap().cast(),
+        );
+        bob.send(request).into_future().instrument(bob_span.clone()).await?;
+
+        // Sanity check: Both users see the others' device
+        async fn devices_seen(client: &Client, other: &UserId) -> UserDevices {
+            client
+                .olm_machine_for_testing()
+                .await
+                .as_ref()
+                .unwrap()
+                .get_user_devices(other, Some(Duration::from_secs(1)))
+                .await
+                .unwrap()
+        }
+
+        timeout(
+            async {
+                loop {
+                    let bob_devices = devices_seen(&alice, bob.user_id().unwrap()).await;
+                    if bob_devices.devices().count() >= 1 {
+                        return;
+                    }
+                }
+            },
+            Duration::from_secs(30), // This can take quite a while to happen on the CI runners.
+        )
+        .await
+        .expect("Alice did not see bob's device");
+
+        bob.sync_once().instrument(bob_span.clone()).await?;
+        let alice_devices = devices_seen(&bob, alice.user_id().unwrap()).await;
+        assert_eq!(alice_devices.devices().count(), 1, "Bob did not see Alice's device");
+    }
+
+    // Alice creates a room ...
+    let alice_room = alice
+        .create_room(assign!(CreateRoomRequest::new(), {
+            preset: Some(RoomPreset::PublicChat),
+        }))
+        .await?;
+    alice_room.enable_encryption().await?;
+
+    info!(room_id = ?alice_room.room_id(), "Alice has created and enabled encryption in the room");
+
+    // ... and sends a message
+    alice_room
+        .send(RoomMessageEventContent::text_plain("Hello Bob"))
+        .await
+        .expect("We should be able to send a message to the room");
+
+    // Alice invites Bob to the room
+    // TODO: invite Bob rather than just call `share_history`
+    alice_room.share_history(bob.user_id().unwrap()).await?;
+
+    let bob_response = bob.sync_once().instrument(bob_span.clone()).await?;
+
+    // Bob should have received a to-device event with the payload
+    assert_eq!(bob_response.to_device.len(), 1);
+    let to_device_event = &bob_response.to_device[0];
+    assert_eq!(
+        to_device_event.get_field::<String>("type").unwrap().unwrap(),
+        "io.element.msc4268.room_key_bundle"
+    );
+
+    // TODO: ensure Bob can decrypt the content
+
+    Ok(())
+}