Mark AvatarEventContent as non_exhaustive

ruma-events/src/room/avatar.rs

@@ -13,6 +13,7 @@ pub type AvatarEvent = StateEvent<AvatarEventContent>;
 
 /// The payload for `AvatarEvent`.
 #[derive(Clone, Debug, Deserialize, Serialize, StateEventContent)]
+#[non_exhaustive]
 #[ruma_event(type = "m.room.avatar")]
 pub struct AvatarEventContent {
     /// Information about the avatar image.
@@ -23,3 +24,10 @@ pub struct AvatarEventContent {
     /// URL of the avatar image.
     pub url: String,
 }
+
+impl AvatarEventContent {
+    /// Create an `AvatarEventContent` from the given image URL.
+    pub fn new(url: String) -> Self {
+        Self { info: None, url }
+    }
+}

ruma-events/tests/state_event.rs

@@ -193,6 +193,7 @@ fn deserialize_avatar_without_prev_content() {
             content: AnyStateEventContent::RoomAvatar(AvatarEventContent {
                 info: Some(info),
                 url,
+                ..
             }),
             event_id,
             origin_server_ts,