Add test and example event to ensure display name changes work correctly.

matrix_sdk_base/src/models/room_member.rs

@@ -253,6 +253,50 @@ mod test {
         assert_eq!(member.power_level, Int::new(100));
     }
 
+    #[async_test]
+    async fn room_member_display_name_change() {
+        let client = get_client().await;
+        let room_id = test_room_id();
+
+        let mut builder = EventBuilder::default();
+        let mut initial_response = builder
+            .add_room_event(EventsJson::Member, RoomEvent::RoomMember)
+            .build_sync_response();
+        let mut name_change_response = builder
+            .add_room_event(EventsJson::MemberNameChange, RoomEvent::RoomMember)
+            .build_sync_response();
+
+        client.receive_sync_response(&mut initial_response).await.unwrap();
+
+        let room = client.get_joined_room(&room_id).await.unwrap();
+
+        // Initially, the display name is "example".
+        {
+            let room = room.read().await;
+
+            let member = room
+                .joined_members
+                .get(&UserId::try_from("@example:localhost").unwrap())
+                .unwrap();
+
+            assert_eq!(member.display_name.as_ref().unwrap(), "example");
+        }
+
+        client.receive_sync_response(&mut name_change_response).await.unwrap();
+
+        // Afterwards, the display name is "changed".
+        {
+            let room = room.read().await;
+
+            let member = room
+                .joined_members
+                .get(&UserId::try_from("@example:localhost").unwrap())
+                .unwrap();
+
+            assert_eq!(member.display_name.as_ref().unwrap(), "changed");
+        }
+    }
+
     #[async_test]
     async fn member_presence_events() {
         let client = get_client().await;

matrix_sdk_test/src/lib.rs

@@ -31,6 +31,7 @@ pub enum EventsJson {
     HistoryVisibility,
     JoinRules,
     Member,
+    MemberNameChange,
     MessageEmote,
     MessageNotice,
     MessageText,
@@ -154,6 +155,7 @@ impl EventBuilder {
     ) -> &mut Self {
         let val: &JsonValue = match json {
             EventsJson::Member => &test_json::MEMBER,
+            EventsJson::MemberNameChange => &test_json::MEMBER_NAME_CHANGE,
             EventsJson::PowerLevels => &test_json::POWER_LEVELS,
             _ => panic!("unknown room event json {:?}", json),
         };

matrix_sdk_test/src/test_json/events.rs

@@ -234,6 +234,32 @@ lazy_static! {
     });
 }
 
+// TODO: Move `prev_content` into `unsigned` once ruma supports it
+lazy_static! {
+    pub static ref MEMBER_NAME_CHANGE: JsonValue = json!({
+        "content": {
+            "avatar_url": null,
+            "displayname": "changed",
+            "membership": "join"
+        },
+        "event_id": "$151800234427abgho:localhost",
+        "membership": "join",
+        "origin_server_ts": 151800152,
+        "sender": "@example:localhost",
+        "state_key": "@example:localhost",
+        "type": "m.room.member",
+        "prev_content": {
+            "avatar_url": null,
+            "displayname": "example",
+            "membership": "join"
+        },
+        "unsigned": {
+            "age": 297032,
+            "replaces_state": "$151800140517rfvjc:localhost"
+        }
+    });
+}
+
 lazy_static! {
     pub static ref MESSAGE_EDIT: JsonValue = json!({
         "content": {

matrix_sdk_test/src/test_json/mod.rs

@@ -9,7 +9,7 @@ pub mod sync;
 
 pub use events::{
     ALIAS, ALIASES, EVENT_ID, KEYS_QUERY, KEYS_UPLOAD, LOGIN, LOGIN_RESPONSE_ERR, LOGOUT, MEMBER,
-    MESSAGE_EDIT, MESSAGE_TEXT, NAME, POWER_LEVELS, PRESENCE, PUBLIC_ROOMS, REACTION,
-    REGISTRATION_RESPONSE_ERR, ROOM_ID, ROOM_MESSAGES, TYPING,
+    MEMBER_NAME_CHANGE, MESSAGE_EDIT, MESSAGE_TEXT, NAME, POWER_LEVELS, PRESENCE, PUBLIC_ROOMS,
+    REACTION, REGISTRATION_RESPONSE_ERR, ROOM_ID, ROOM_MESSAGES, TYPING,
 };
 pub use sync::{DEFAULT_SYNC_SUMMARY, INVITE_SYNC, LEAVE_SYNC, LEAVE_SYNC_EVENT, MORE_SYNC, SYNC};