Validate that min frame number is numeric (#86498)

.ci.yaml

@@ -1628,6 +1628,14 @@ targets:
         ["devicelab"]
     scheduler: luci
 
+  - name: Mac_android integration_ui_frame_number
+    builder: Mac_android integration_ui_frame_number
+    presubmit: false
+    properties:
+      tags: >
+        ["devicelab"]
+    scheduler: luci
+
   - name: Mac_android integration_ui_screenshot
     builder: Mac_android integration_ui_screenshot
     presubmit: false
@@ -1912,6 +1920,14 @@ targets:
         ["devicelab"]
     scheduler: luci
 
+  - name: Mac_ios integration_ui_ios_frame_number
+    builder: Mac_ios integration_ui_ios_frame_number
+    presubmit: false
+    properties:
+      tags: >
+        ["devicelab"]
+    scheduler: luci
+
   - name: Mac_ios integration_ui_ios_screenshot
     builder: Mac_ios integration_ui_ios_screenshot
     presubmit: false

TESTOWNERS

@@ -93,6 +93,7 @@
 /dev/devicelab/bin/tasks/imagefiltered_transform_animation_perf__timeline_summary.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/integration_test_test.dart @zanderso @flutter/tool
 /dev/devicelab/bin/tasks/integration_ui_driver.dart @zanderso @flutter/tool
+/dev/devicelab/bin/tasks/integration_ui_frame_number.dart @iskakaushik @flutter/engine
 /dev/devicelab/bin/tasks/integration_ui_keyboard_resize.dart @zanderso @flutter/tool
 /dev/devicelab/bin/tasks/integration_ui_screenshot.dart @zanderso @flutter/tool
 /dev/devicelab/bin/tasks/integration_ui_textfield.dart @zanderso @flutter/tool
@@ -126,6 +127,7 @@
 /dev/devicelab/bin/tasks/hot_mode_dev_cycle_macos_target__benchmark.dart @zanderso @flutter/tool
 /dev/devicelab/bin/tasks/integration_test_test_ios.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/integration_ui_ios_driver.dart @zanderso @flutter/tool
+/dev/devicelab/bin/tasks/integration_ui_ios_frame_number.dart @iskakaushik @flutter/engine
 /dev/devicelab/bin/tasks/integration_ui_ios_keyboard_resize.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/integration_ui_ios_screenshot.dart @zanderso @flutter/tool
 /dev/devicelab/bin/tasks/integration_ui_ios_textfield.dart @zanderso @flutter/tool

dev/devicelab/bin/tasks/integration_ui_frame_number.dart

@@ -0,0 +1,12 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter_devicelab/framework/devices.dart';
+import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/tasks/integration_tests.dart';
+
+Future<void> main() async {
+  deviceOperatingSystem = DeviceOperatingSystem.android;
+  await task(createEndToEndFrameNumberTest());
+}

dev/devicelab/bin/tasks/integration_ui_ios_frame_number.dart

@@ -0,0 +1,12 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter_devicelab/framework/devices.dart';
+import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/tasks/integration_tests.dart';
+
+Future<void> main() async {
+  deviceOperatingSystem = DeviceOperatingSystem.ios;
+  await task(createEndToEndFrameNumberTest());
+}

dev/devicelab/lib/tasks/integration_tests.dart

@@ -92,6 +92,13 @@ TaskFunction createEndToEndKeyboardTest() {
   );
 }
 
+TaskFunction createEndToEndFrameNumberTest() {
+  return DriverTest(
+    '${flutterDirectory.path}/dev/integration_tests/ui',
+    'lib/frame_number.dart',
+  );
+}
+
 TaskFunction createEndToEndDriverTest() {
   return DriverTest(
     '${flutterDirectory.path}/dev/integration_tests/ui',

dev/integration_tests/ui/lib/frame_number.dart

@@ -0,0 +1,63 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:async';
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
+import 'package:flutter_driver/driver_extension.dart';
+
+/// This application shows empty screen until first frame timings are acquired.
+void main() {
+  enableFlutterDriverExtension();
+
+  final Completer<List<FrameTiming>> completer = Completer<List<FrameTiming>>();
+  SchedulerBinding.instance!.addTimingsCallback((List<FrameTiming> timings) {
+    completer.complete(timings);
+  });
+
+  runApp(Directionality(
+    textDirection: TextDirection.ltr,
+    child: _FirstFrameTimings(completer: completer),
+  ));
+}
+
+class _FirstFrameTimings extends StatefulWidget {
+  const _FirstFrameTimings({
+    Key? key,
+    required this.completer,
+  }) : super(key: key);
+
+  final Completer<List<FrameTiming>> completer;
+
+  @override
+  _FirstFrameTimingsState createState() => _FirstFrameTimingsState();
+}
+
+class _FirstFrameTimingsState extends State<_FirstFrameTimings> {
+  int? _minFrameNumber;
+
+  @override
+  Widget build(BuildContext context) {
+    widget.completer.future.then(_setMinFrameNumber);
+    if (_minFrameNumber != null) {
+      return Text(
+        _minFrameNumber.toString(),
+        key: const Key('minFrameNumber'),
+      );
+    } else {
+      return const Text('Waiting...');
+    }
+  }
+
+  void _setMinFrameNumber(List<FrameTiming> timings) {
+    final int minFrameNumber = timings
+      .map((FrameTiming timing) => timing.frameNumber)
+      .reduce(min);
+    setState(() {
+      _minFrameNumber = minFrameNumber;
+    });
+  }
+}

dev/integration_tests/ui/test_driver/frame_number_test.dart

@@ -0,0 +1,38 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter_driver/flutter_driver.dart';
+import 'package:test/test.dart' hide TypeMatcher, isInstanceOf;
+
+bool _isNumeric(String s) {
+  return double.tryParse(s) != null;
+}
+
+// Connect and disconnect from the empty app.
+void main() {
+  group('FrameNumber', () {
+    late FlutterDriver driver;
+
+    setUpAll(() async {
+      driver = await FlutterDriver.connect();
+    });
+
+    tearDownAll(() async {
+      await driver.close();
+    });
+
+    test('minFrameNumber is numeric', () async {
+      final SerializableFinder minFrameNumberFinder =
+          find.byValueKey('minFrameNumber');
+      await driver.waitFor(
+        minFrameNumberFinder,
+        timeout: const Duration(seconds: 5),
+      );
+      final String minFrameNumber = await driver.getText(minFrameNumberFinder);
+      // TODO(iskakaushik): enable the stronger check of _minFrameNumber == '1',
+      // once this is fixed. https://github.com/flutter/flutter/issues/86487
+      expect(_isNumeric(minFrameNumber), true);
+    }, timeout: Timeout.none);
+  });
+}

dev/manual_tests/windows/flutter/generated_plugin_registrant.cc

@@ -2,6 +2,8 @@
 //  Generated file. Do not edit.
 //
 
+// clang-format off
+
 #include "generated_plugin_registrant.h"
 
 

packages/integration_test/test/binding_test.dart

@@ -72,6 +72,7 @@ Future<void> main() async {
     testWidgets('Test traceAction', (WidgetTester tester) async {
       await integrationBinding.enableTimeline(vmService: fakeVM);
       await integrationBinding.traceAction(() async {});
+      print(integrationBinding.reportData);
       expect(integrationBinding.reportData, isNotNull);
       expect(integrationBinding.reportData!.containsKey('timeline'), true);
       expect(