Compose saved Scenario authoring with current Text and input authority

crates/oa-desktop/src/app/transition_context_tests.rs

@@ -49,11 +49,28 @@ fn fixture(layer: Layer, kind: Kind) -> (App, Id, Id, Id) {
     p.diagrams.get_mut(&view).unwrap().name = "Unrelated architecture".into();
     p.place(view, reused, Position { x: 873., y: 421. });
     let mut app = App::with_project(p);
-    app.layer = layer;
-    app.page = Page::Behavior;
-    app.selected = root;
-    app.behavior.active_owner = Some(root);
-    app.refresh_draft();
+    let accepted = app.document.snapshot();
+    // Enter through the actual navigation path: assigning Page/owner alone does
+    // not create the representation and live visit required by canvas events.
+    send(&mut app, Message::Select(root));
+    send(&mut app, Message::Page(Page::Behavior));
+    assert_eq!(app.layer, layer);
+    assert_eq!(app.page, Page::Behavior);
+    assert_eq!(app.selected, root);
+    assert_eq!(app.behavior.active_owner, Some(root));
+    if kind == Kind::Scenario {
+        let context = app.scenario_context().unwrap();
+        assert_eq!(context.document, app.canvas_document);
+        assert_eq!(context.scenario, root);
+        assert_eq!(
+            context.representation,
+            crate::behavior::scenario_layout::Representation::Derived { owner: root }
+        );
+        assert!(!context.visit.is_nil());
+    }
+    assert!(Arc::ptr_eq(&accepted, &app.document.snapshot()));
+    assert_eq!(app.source_workspace.bundle(), accepted.bundle);
+    assert!(!app.document.can_undo() && !app.document.can_redo());
     (app, root, work, reused)
 }