Show debug-mode message for widget rebuilds in profile mode

packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats.dart

@@ -92,6 +92,19 @@ class _RebuildStatsViewState extends State<RebuildStatsView>
 
   @override
   Widget build(BuildContext context) {
+    final isProfileBuild =
+        serviceConnection.serviceManager.connectedApp?.isProfileBuildNow ??
+        false;
+    if (isProfileBuild) {
+      return const Center(
+        child: Text(
+          'Rebuild information is not available for this frame.\n'
+          'Widget rebuild counts are only available when running '
+          'an app in debug-mode.',
+          textAlign: TextAlign.center,
+        ),
+      );
+    }
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

@@ -23,7 +23,8 @@ TODO: Remove this section if there are not any updates.
 
 ## Performance updates
 
-TODO: Remove this section if there are not any updates.
+- Showed a message in the Performance panel when widget rebuild tracking was unavailable because the app was running in profile mode.
+  unavailable because the app is running in profile mode. [#9755](https://github.com/flutter/devtools/pull/9755)
 
 ## CPU profiler updates
 

packages/devtools_app/test/screens/performance/performance_screen_test.dart

@@ -9,6 +9,7 @@ import 'dart:async';
 
 import 'package:devtools_app/devtools_app.dart';
 import 'package:devtools_app/src/screens/performance/panes/controls/performance_controls.dart';
+import 'package:devtools_app/src/screens/performance/panes/rebuild_stats/rebuild_stats.dart';
 import 'package:devtools_app/src/screens/performance/panes/timeline_events/timeline_events_view.dart';
 import 'package:devtools_app/src/screens/performance/tabbed_performance_view.dart';
 import 'package:devtools_app/src/shared/feature_flags.dart';
@@ -218,7 +219,6 @@ void main() {
           await tester.runAsync(() async {
             await pumpPerformanceScreen(tester, runAsync: true);
             await tester.pumpAndSettle();
-
             final chartButtonFinder = find.byType(VisibilityButton);
             expect(chartButtonFinder, findsOneWidget);
 
@@ -231,7 +231,6 @@ void main() {
 
             await tester.tap(chartButtonFinder);
             await tester.pumpAndSettle();
-
             // The flutter frames chart should no longer be visible.
             expect(find.byType(FramesChartControls), findsNothing);
             expect(
@@ -252,46 +251,6 @@ void main() {
         },
       );
 
-      // testWidgetsWithWindowSize(
-      //   'clears timeline on clear',
-      //   windowSize,
-      //   (WidgetTester tester) async {
-      //     await tester.runAsync(() async {
-      //       await pumpPerformanceScreen(tester, runAsync: true);
-      //       await tester.pumpAndSettle();
-
-      //       // Ensure the Timeline Events tab is selected.
-      //       final timelineEventsTabFinder = find.text('Timeline Events');
-      //       expect(timelineEventsTabFinder, findsOneWidget);
-      //       await tester.tap(timelineEventsTabFinder);
-      //       await tester.pumpAndSettle();
-
-      //       expect(
-      //         controller.timelineEventsController.allTraceEvents,
-      //         isNotEmpty,
-      //       );
-      //       expect(find.byType(FlutterFramesChart), findsOneWidget);
-      //       expect(find.byType(TimelineFlameChart), findsOneWidget);
-      //       expect(
-      //         find.byKey(TimelineEventsView.emptyTimelineKey),
-      //         findsNothing,
-      //       );
-      //       expect(find.byType(EventDetails), findsOneWidget);
-
-      //       await tester.tap(find.byIcon(Icons.block));
-      //       await tester.pumpAndSettle();
-      //       expect(controller.timelineEventsController.allTraceEvents, isEmpty);
-      //       expect(find.byType(FlutterFramesChart), findsOneWidget);
-      //       expect(find.byType(TimelineFlameChart), findsNothing);
-      //       expect(
-      //         find.byKey(TimelineEventsView.emptyTimelineKey),
-      //         findsOneWidget,
-      //       );
-      //       expect(find.byType(EventDetails), findsNothing);
-      //     });
-      //   },
-      // );
-
       testWidgetsWithWindowSize('opens enhance tracing overlay', windowSize, (
         WidgetTester tester,
       ) async {
@@ -395,6 +354,69 @@ void main() {
         },
       );
     });
+
+    group('RebuildStatsView', () {
+      late FakeServiceConnectionManager fakeServiceConnection;
+      late RebuildCountModel model;
+      late ValueNotifier<FlutterFrame?> selectedFrame;
+
+      setUp(() {
+        fakeServiceConnection = FakeServiceConnectionManager();
+        final app = fakeServiceConnection.serviceManager.connectedApp!;
+        when(app.initialized).thenReturn(Completer()..complete(true));
+        when(app.isDartWebAppNow).thenReturn(false);
+        when(app.isFlutterAppNow).thenReturn(true);
+        when(app.isDartCliAppNow).thenReturn(false);
+        when(app.isDartWebApp).thenAnswer((_) async => false);
+        when(app.isProfileBuild).thenAnswer((_) async => false);
+        setGlobal(ServiceConnectionManager, fakeServiceConnection);
+        setGlobal(IdeTheme, IdeTheme());
+        setGlobal(NotificationService, NotificationService());
+        setGlobal(BannerMessagesController, BannerMessagesController());
+        setGlobal(PreferencesController, PreferencesController());
+        setGlobal(OfflineDataController, OfflineDataController());
+        model = RebuildCountModel();
+        selectedFrame = ValueNotifier<FlutterFrame?>(null);
+      });
+
+      testWidgets('shows message when running in profile mode', (
+        WidgetTester tester,
+      ) async {
+        final app = fakeServiceConnection.serviceManager.connectedApp!;
+        when(app.isProfileBuildNow).thenReturn(true);
+
+        await tester.pumpWidget(
+          wrapWithControllers(
+            RebuildStatsView(model: model, selectedFrame: selectedFrame),
+          ),
+        );
+        await tester.pump();
+
+        expect(
+          find.textContaining('Widget rebuild counts are only available'),
+          findsOneWidget,
+        );
+      });
+
+      testWidgets('shows normal UI when running in debug mode', (
+        WidgetTester tester,
+      ) async {
+        final app = fakeServiceConnection.serviceManager.connectedApp!;
+        when(app.isProfileBuildNow).thenReturn(false);
+
+        await tester.pumpWidget(
+          wrapWithControllers(
+            RebuildStatsView(model: model, selectedFrame: selectedFrame),
+          ),
+        );
+        await tester.pump();
+
+        expect(
+          find.textContaining('Widget rebuild counts are only available'),
+          findsNothing,
+        );
+      });
+    });
   });
 }