Toaster::shown: the titles and severities on show, for owners and tests

src/feedback/toast.rs

@@ -125,6 +125,12 @@ impl Toaster {
         id
     }
 
+    /// The titles and severities on show, oldest first.
+    pub fn shown(&self) -> Vec<(SharedString, Option<Severity>)> {
+        let staying = self.live.iter().filter(|live| !live.leaving);
+        staying.map(|live| (live.toast.title.clone(), live.toast.severity)).collect()
+    }
+
     /// Sends a toast away: it fades and folds, then leaves the stack.
     pub fn dismiss(&mut self, id: u64, cx: &mut Context<Self>) {
         let Some(live) = self