import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pilotvault_fly/flight_model.dart';
import 'package:pilotvault_fly/fly/action_rail_state.dart';
import 'package:pilotvault_fly/fly/fly_prefs.dart';
import 'package:pilotvault_fly/fly/modes/vision_modes.dart';
import 'package:pilotvault_fly/fly/product_profile.dart';
import 'package:pilotvault_fly/fly/safety_gate.dart';
import 'package:pilotvault_fly/fly/state/aircraft_state.dart';
import 'package:pilotvault_fly/fly/state/mission_state.dart';
import 'package:pilotvault_fly/fly/telemetry_reducer.dart';
import 'package:pilotvault_fly/ui/fly/dialogs/slide_to_confirm.dart';
import 'package:pilotvault_fly/ui/fly/fly_screen.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'fake_dji.dart';
import 'profile_fixtures.dart';
import 'telemetry_fixtures.dart';

Map<String, dynamic> trackEvent(String state, {Map<String, Object?>? tracking, String? error}) => <String, dynamic>{
      'type': 'mission',
      'operator': 'activeTrack',
      'state': state,
      if (tracking != null) 'tracking': tracking,
      if (error != null) 'error': error,
    };

Map<String, dynamic> tapFlyEvent(String state, {Map<String, Object?>? execution}) => <String, dynamic>{
      'type': 'mission',
      'operator': 'tapFly',
      'state': state,
      if (execution != null) 'execution': execution,
    };

const Map<String, Object?> box = <String, Object?>{'l': 0.4, 't': 0.3, 'r': 0.6, 'b': 0.7};

FlightModel modelWith(Map<String, dynamic> tick, {Map<String, dynamic>? profile}) {
  final FlightModel m = FlightModel()
    ..connected = true
    ..profile = ProductProfile.fromBridge(profile ?? phantom4);
  TelemetryReducer(m)
    ..apply(tick)
    ..apply(trackEvent('IDLE'))
    ..apply(tapFlyEvent('IDLE'));
  return m;
}

Map<String, dynamic> grounded() => telemetryTick()
  ..['isFlying'] = false
  ..['areMotorsOn'] = false;

void main() {
  group('VisionGeometry', () {
    const Rect view = Rect.fromLTWH(0, 0, 800, 400);

    test('the picture is aspect-fitted and centred; unknown size fills the view', () {
      // 16:9 feed on a 19.5:9 phone: bars left and right.
      final Rect wide = VisionGeometry.contentRect(const Size(844, 390), const Size(1920, 1080));
      expect(wide.height, 390);
      expect(wide.width, closeTo(693.33, 0.01));
      expect(wide.left, closeTo((844 - 693.33) / 2, 0.01));
      // 4:3 feed on a 16:10 tablet: bars left and right too.
      expect(VisionGeometry.contentRect(const Size(1280, 800), const Size(1440, 1080)).width, closeTo(1066.67, 0.01));
      // A feed wider than the view: bars top and bottom.
      final Rect tall = VisionGeometry.contentRect(const Size(400, 400), const Size(1920, 1080));
      expect(tall.width, 400);
      expect(tall.top, closeTo(87.5, 0.01));
      expect(VisionGeometry.contentRect(const Size(844, 390), null), const Rect.fromLTWH(0, 0, 844, 390));
    });

    test('a drag becomes a 0..1 box whichever way it was drawn, clipped to the picture', () {
      final Rect r = VisionGeometry.dragBox(const Offset(600, 300), const Offset(200, -50), view)!;
      expect(r, const Rect.fromLTRB(0.25, 0, 0.75, 0.75));
    });

    test('a small drag, or one on a bar, is no box', () {
      expect(VisionGeometry.dragBox(const Offset(100, 100), const Offset(110, 200), view), isNull);
      const Rect content = Rect.fromLTWH(100, 0, 600, 400);
      expect(VisionGeometry.dragBox(const Offset(0, 50), const Offset(90, 200), content), isNull);
    });

    test('taps are relative to the picture, and nothing on a bar', () {
      const Rect content = Rect.fromLTWH(100, 0, 600, 400);
      expect(VisionGeometry.normalise(const Offset(400, 200), content), const Offset(0.5, 0.5));
      expect(VisionGeometry.normalise(const Offset(50, 200), content), isNull);
      expect(VisionGeometry.tapBoxAt(const Offset(750, 200), content), isNull);
      expect(VisionGeometry.pointToScreen(const Offset(0.5, 0.5), content), const Offset(400, 200));
      expect(VisionGeometry.toScreen(const Rect.fromLTRB(0, 0, 1, 1), content), content);
    });

    test('a tap makes a person-sized box, kept inside the picture', () {
      final Rect mid = VisionGeometry.tapBoxAt(const Offset(400, 200), view)!;
      expect(mid.center, const Offset(0.5, 0.5));
      expect(mid.width, closeTo(VisionGeometry.tapBox.width, 1e-9));
      expect(mid.height, closeTo(VisionGeometry.tapBox.height, 1e-9));
      final Rect corner = VisionGeometry.tapBoxAt(const Offset(1, 1), view)!;
      expect(corner.left, closeTo(0, 1e-9));
      expect(corner.top, closeTo(0, 1e-9));
    });
  });

  group('MissionState (vision operators)', () {
    test('ActiveTrack: selecting, confirming, following, losing, done', () {
      final MissionState s = MissionState()..apply(trackEvent('WAITING_FOR_CONFIRMATION', tracking: <String, Object?>{
            'targetState': 'WAITING_FOR_CONFIRMATION',
            'targetType': 'HUMAN',
            'rect': box,
          }));
      expect(s.activeTrack.waitingForConfirmation, isTrue);
      expect(s.activeTrack.rect, const Rect.fromLTRB(0.4, 0.3, 0.6, 0.7));
      expect(s.state, 'tracking');
      expect(s.tracking, isTrue);

      s.apply(trackEvent('AIRCRAFT_FOLLOWING', tracking: <String, Object?>{'targetState': 'TRACKING_WITH_LOW_CONFIDENCE', 'rect': box}));
      expect(s.activeTrack.following, isTrue);
      expect(s.activeTrack.lowConfidence, isTrue);

      s.apply(trackEvent('FINDING_TRACKED_TARGET'));
      expect(s.activeTrack.rect, isNotNull, reason: 'a state-only event keeps the box while tracking');

      s.apply(trackEvent('CANNOT_CONFIRM', tracking: <String, Object?>{'targetState': 'CANNOT_CONFIRM', 'reason': 'TARGET_TOO_CLOSE', 'rect': box}));
      expect(s.activeTrack.cannotConfirm, isTrue);
      expect(s.activeTrack.reasonLabel, 'Subject too close');

      s.apply(trackEvent('IDLE'));
      expect(s.activeTrack.active, isFalse);
      expect(s.activeTrack.rect, isNull);
      expect(s.state, 'idle');
    });

    test('a malformed rect is ignored', () {
      final MissionState s = MissionState()
        ..apply(trackEvent('AIRCRAFT_FOLLOWING', tracking: <String, Object?>{'rect': <String, Object?>{'l': 0.6, 't': 0.3, 'r': 0.4, 'b': 0.7}}));
      expect(s.activeTrack.rect, isNull);
    });

    test('the operator replaces the old QuickShot guess', () {
      final MissionState s = MissionState()..apply(<String, dynamic>{'type': 'mission', 'state': 'quickshot'});
      expect(s.tracking, isTrue);
      s.apply(trackEvent('IDLE'));
      expect(s.tracking, isFalse);
    });

    test('TapFly: flying with an image point and a bypass, then idle', () {
      final MissionState s = MissionState()
        ..apply(tapFlyEvent('EXECUTING', execution: <String, Object?>{'imageX': 0.3, 'imageY': 0.4, 'bypass': 'LEFT', 'speed': 4.0}));
      expect(s.tapFly.active, isTrue);
      expect(s.tapFly.image, const Offset(0.3, 0.4));
      expect(s.tapFly.bypassLabel, contains('left'));
      expect(s.state, 'tapfly');
      final AircraftState a = AircraftState()..apply(telemetryTick());
      expect(RailState.of(connected: true, a: a, mission: s).mode, ActiveMode.tapFly);
      s.apply(tapFlyEvent('IDLE'));
      expect(s.tapFly.active, isFalse);
      expect(s.tapFly.image, isNull);
    });
  });

  group('SafetyGate (vision modes)', () {
    List<String> blockers(List<GateCheck> c) => <String>[for (final GateCheck g in c) if (g.blocks) g.message];
    List<String> warnings(List<GateCheck> c) => <String>[for (final GateCheck g in c) if (!g.blocks) g.message];
    SafetyGate gate(FlightModel m, [FakeDjiService? dji]) => SafetyGate(model: m, dji: dji ?? FakeDjiService());

    test('airborne in P mode with a good battery: ActiveTrack and TapFly may start', () {
      final FlightModel m = modelWith(telemetryTick());
      expect(blockers(gate(m).checkActiveTrack(TrackMode.trace)), isEmpty);
      expect(blockers(gate(m).checkTapFly(TapFlyDirection.forward)), isEmpty);
    });

    test('on the ground, low, in Sport, going home or during a waypoint mission they refuse', () {
      expect(blockers(gate(modelWith(grounded())).checkActiveTrack(TrackMode.trace)), <String>['Take off first.']);
      expect(blockers(gate(modelWith(telemetryTick(altitude: 1))).checkTapFly(TapFlyDirection.forward)), contains('Climb above 2 m first.'));
      expect(blockers(gate(modelWith(telemetryTick()..['flightModeEnum'] = 'GPS_SPORT')).checkTapFly(TapFlyDirection.forward)),
          contains('Switch the remote to P mode first.'));
      expect(blockers(gate(modelWith(telemetryTick()..['isGoingHome'] = true)).checkActiveTrack(TrackMode.trace)), contains('Cancel Return to Home first.'));
      final FlightModel wp = modelWith(telemetryTick());
      wp.mission.apply(<String, dynamic>{'type': 'mission', 'operator': 'waypoint', 'state': 'EXECUTING'});
      expect(blockers(gate(wp).checkActiveTrack(TrackMode.trace)), contains('Stop the waypoint mission first.'));
    });

    test('one vision mode at a time', () {
      final FlightModel m = modelWith(telemetryTick());
      m.mission.apply(tapFlyEvent('EXECUTING'));
      expect(blockers(gate(m).checkActiveTrack(TrackMode.trace)), contains('Stop TapFly first.'));
      m.mission.apply(tapFlyEvent('IDLE'));
      m.mission.apply(trackEvent('AIRCRAFT_FOLLOWING'));
      expect(blockers(gate(m).checkTapFly(TapFlyDirection.forward)), contains('Stop ActiveTrack first.'));
    });

    test('TapFly Backward and Free need rear sensors', () {
      final FlightModel p4 = modelWith(telemetryTick()); // Phantom 4: front only
      expect(gate(p4).tapFlyDirections(), <TapFlyDirection>[TapFlyDirection.forward]);
      expect(blockers(gate(p4).checkTapFly(TapFlyDirection.backward)).single, contains('not available'));
    });

    test('Free warns that it does not avoid obstacles', () {
      final FlightModel m = FlightModel()..connected = true;
      TelemetryReducer(m).apply(telemetryTick());
      expect(warnings(gate(m).checkTapFly(TapFlyDirection.free)).single, contains('Free does not avoid'));
    });

    test('Profile warns about its blind side', () {
      expect(warnings(gate(modelWith(telemetryTick())).checkActiveTrack(TrackMode.profile)).single, contains('sideways'));
    });

    test('start sends the clipped box / point, and refuses without touching the aircraft', () async {
      final FakeDjiService dji = FakeDjiService();
      await gate(modelWith(telemetryTick()), dji).startActiveTrack(const Rect.fromLTRB(0.2, -0.1, 0.4, 0.5), TrackMode.spotlight);
      await gate(modelWith(telemetryTick()), dji).startTapFly(const Offset(0.7, 0.4), TapFlyDirection.forward, speed: 30);
      expect(dji.calls, <String>['startActiveTrack(0.20, 0.00, 0.20, 0.50, SPOTLIGHT)', 'startTapFly(0.70, 0.40, FORWARD, 10, true)']);

      final FakeDjiService none = FakeDjiService();
      await expectLater(gate(modelWith(grounded()), none).startTapFly(const Offset(0.5, 0.5), TapFlyDirection.forward), throwsA(isA<MissionRefused>()));
      expect(none.calls, isEmpty);
    });

    test('confirm only answers a question that was asked; Stop reaches TapFly', () async {
      final FakeDjiService dji = FakeDjiService();
      final FlightModel m = modelWith(telemetryTick());
      await gate(m, dji).confirmActiveTrack(yes: true);
      expect(dji.calls, isEmpty);
      m.mission.apply(trackEvent('WAITING_FOR_CONFIRMATION'));
      await gate(m, dji).confirmActiveTrack(yes: true);
      await gate(m, dji).confirmActiveTrack(yes: false);
      m.mission.apply(trackEvent('IDLE'));
      m.mission.apply(tapFlyEvent('EXECUTING'));
      await gate(m, dji).run(FlightCommand.stopMode);
      expect(dji.calls, <String>['acceptActiveTrackConfirmation', 'rejectActiveTrackConfirmation', 'stopTapFly']);
    });
  });

  group('auto-sensing, retreat, reset heading, palm, video size', () {
    test('sensed subjects arrive while auto-sensing, the flags stick across events', () {
      final MissionState s = MissionState()
        ..apply(<String, dynamic>{'type': 'mission', 'operator': 'activeTrack', 'state': 'IDLE', 'autoSensingSupported': true, 'autoSensing': false});
      expect(s.activeTrack.autoSensingSupported, isTrue);
      s.apply(trackEvent('AUTO_SENSING', tracking: <String, Object?>{
        'subjects': <Object?>[
          <String, Object?>{'index': 3, 'type': 'HUMAN', 'rect': box},
          <String, Object?>{'index': 4, 'type': 'CAR', 'rect': <String, Object?>{'l': 0.1, 't': 0.1, 'r': 0.05, 'b': 0.2}}, // bad rect
        ],
      })..['autoSensing'] = true);
      expect(s.activeTrack.subjects.single.index, 3);
      expect(s.activeTrack.autoSensing, isTrue);
      expect(s.activeTrack.autoSensingSupported, isTrue, reason: 'not repeated, still known');
      expect(s.activeTrack.stateLabel, 'Tap a subject');
      s.apply(trackEvent('AIRCRAFT_FOLLOWING', tracking: <String, Object?>{'rect': box}));
      expect(s.activeTrack.subjects, isEmpty);
    });

    test('auto-sensing needs support and no tracking; a subject starts by index', () async {
      final FakeDjiService dji = FakeDjiService();
      final FlightModel m = modelWith(telemetryTick());
      final SafetyGate g = SafetyGate(model: m, dji: dji);
      await expectLater(g.setAutoSensing(true), throwsA(isA<MissionRefused>()));
      m.mission.apply(<String, dynamic>{'type': 'mission', 'operator': 'activeTrack', 'state': 'IDLE', 'autoSensingSupported': true});
      await g.setAutoSensing(true);
      await g.startActiveTrackSubject(3, TrackMode.profile);
      expect(dji.calls, <String>['setActiveTrackAutoSensing(true)', 'startActiveTrackSubject(3, PROFILE)']);
    });

    test('backward needs obstacle sensing; reset heading needs TapFly flying', () async {
      final FakeDjiService dji = FakeDjiService();
      final FlightModel noSensors = FlightModel()..connected = true;
      TelemetryReducer(noSensors).apply(telemetryTick());
      await expectLater(SafetyGate(model: noSensors, dji: dji).setTrackRetreat(true), throwsA(isA<MissionRefused>()));
      final FlightModel m = modelWith(telemetryTick());
      final SafetyGate g = SafetyGate(model: m, dji: dji);
      await g.setTrackRetreat(true);
      await expectLater(g.resetTapFlyHeading(), throwsA(isA<MissionRefused>()));
      m.mission.apply(tapFlyEvent('EXECUTING'));
      await g.resetTapFlyHeading();
      expect(dji.calls, <String>['setActiveTrackRetreat(true)', 'resetTapFlyHeading']);
    });

    test('the reducer takes the video size and the palm-control state', () {
      final FlightModel m = modelWith(telemetryTick());
      TelemetryReducer(m)
        ..apply(<String, dynamic>{'type': 'videoSize', 'width': 1440, 'height': 1080})
        ..apply(telemetryTick()..['palmControl'] = 'FOLLOWING');
      expect(m.videoSize.value, const Size(1440, 1080));
      expect(m.vision.palmActive, isTrue);
      expect(m.vision.palmLabel, 'Following your palm');
    });
  });

  group('FlyScreen (vision modes)', () {
    setUp(() {
      SharedPreferences.setMockInitialValues(<String, Object>{});
      FlyPrefs.acceptedModeTerms.value = <String>{'activeTrack', 'tapFly'};
    });

    Future<FakeDjiService> pump(WidgetTester tester, FlightModel m) async {
      tester.view.physicalSize = const Size(844, 390);
      tester.view.devicePixelRatio = 1;
      addTearDown(tester.view.reset);
      final FakeDjiService dji = FakeDjiService();
      await tester.pumpWidget(MaterialApp(home: FlyScreen(model: m, dji: dji)));
      await tester.pump();
      return dji;
    }

    Future<void> open(WidgetTester tester, String mode) async {
      await tester.tap(find.byKey(const ValueKey<String>('rail-modes')));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 300));
      await tester.tap(find.byKey(ValueKey<String>('mode-$mode')));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 300));
    }

    testWidgets('ActiveTrack: draw a box, GO starts it, the tracked box and Stop follow', (WidgetTester tester) async {
      final FlightModel m = modelWith(telemetryTick());
      final FakeDjiService dji = await pump(tester, m);
      await open(tester, 'activeTrack');
      expect(find.byKey(const ValueKey<String>('track-panel')), findsOneWidget);

      // Draw in the empty middle of the view, clear of the HUD.
      await tester.dragFrom(const Offset(380, 160), const Offset(80, 120));
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('track-go')), findsOneWidget);
      await tester.tap(find.byKey(const ValueKey<String>('track-go')));
      await tester.pumpAndSettle();
      expect(dji.calls.single, startsWith('startActiveTrack('));
      expect(dji.calls.single, endsWith('TRACE)'));

      TelemetryReducer(m).apply(trackEvent('WAITING_FOR_CONFIRMATION', tracking: <String, Object?>{'targetState': 'WAITING_FOR_CONFIRMATION', 'rect': box}));
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('track-box')), findsOneWidget);
      await tester.tap(find.byKey(const ValueKey<String>('track-confirm')));
      await tester.pump();
      expect(dji.calls.last, 'acceptActiveTrackConfirmation');

      TelemetryReducer(m).apply(trackEvent('AIRCRAFT_FOLLOWING', tracking: <String, Object?>{'targetState': 'TRACKING_WITH_HIGH_CONFIDENCE', 'rect': box}));
      await tester.pump();
      await tester.tap(find.byKey(const ValueKey<String>('track-spotlight')));
      await tester.pump();
      expect(dji.calls.last, 'switchActiveTrackMode(SPOTLIGHT)');
      expect(find.byKey(const ValueKey<String>('rail-stopMode')), findsOneWidget);

      await tester.tap(find.byKey(const ValueKey<String>('vision-exit')));
      await tester.pumpAndSettle();
      expect(dji.calls.last, 'stopActiveTrack', reason: 'Exit stops a running mode');
      expect(find.byKey(const ValueKey<String>('track-panel')), findsNothing);
    });

    testWidgets('Auto-detect: tap a sensed subject, GO follows it by index', (WidgetTester tester) async {
      final FlightModel m = modelWith(telemetryTick());
      m.mission.apply(<String, dynamic>{'type': 'mission', 'operator': 'activeTrack', 'state': 'IDLE', 'autoSensingSupported': true});
      final FakeDjiService dji = await pump(tester, m);
      await open(tester, 'activeTrack');
      await tester.tap(find.byKey(const ValueKey<String>('track-autosense')));
      await tester.pump();
      expect(dji.calls.last, 'setActiveTrackAutoSensing(true)');

      TelemetryReducer(m).apply(trackEvent('AUTO_SENSING', tracking: <String, Object?>{
        'subjects': <Object?>[<String, Object?>{'index': 7, 'type': 'HUMAN', 'rect': box}],
      })..['autoSensing'] = true);
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('subject-7')), findsOneWidget);
      // The box only draws; the layer underneath takes the tap.
      await tester.tapAt(tester.getCenter(find.byKey(const ValueKey<String>('subject-7'))));
      await tester.pump();
      await tester.tap(find.byKey(const ValueKey<String>('track-go')));
      await tester.pumpAndSettle();
      expect(dji.calls.last, 'startActiveTrackSubject(7, TRACE)');
    });

    testWidgets('Backward toggles retreat for Trace', (WidgetTester tester) async {
      final FlightModel m = modelWith(telemetryTick());
      final FakeDjiService dji = await pump(tester, m);
      await open(tester, 'activeTrack');
      await tester.tap(find.byKey(const ValueKey<String>('track-retreat')));
      await tester.pump();
      expect(dji.calls.last, 'setActiveTrackRetreat(true)');
      expect(find.text('Backward on'), findsOneWidget);
    });

    testWidgets('with a 4:3 feed, a tap on the black bar is no TapFly target', (WidgetTester tester) async {
      final FlightModel m = modelWith(telemetryTick());
      m.videoSize.value = const Size(1440, 1080); // 520 px wide on a 390 px tall screen: bars of 162 px
      await pump(tester, m);
      await open(tester, 'tapFly');
      await tester.tapAt(const Offset(780, 200));
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('tapfly-target')), findsNothing);
      await tester.tapAt(const Offset(500, 200));
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('tapfly-target')), findsOneWidget);
    });

    testWidgets('palm control shows while the aircraft follows a palm', (WidgetTester tester) async {
      final FlightModel m = modelWith(telemetryTick());
      await pump(tester, m);
      expect(find.byKey(const ValueKey<String>('palm-control')), findsNothing);
      TelemetryReducer(m).apply(telemetryTick()..['palmControl'] = 'FOLLOWING');
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('palm-control')), findsOneWidget);
    });

    testWidgets('a vision mode that would warn asks for the slide first', (WidgetTester tester) async {
      final FlightModel m = modelWith(telemetryTick());
      final FakeDjiService dji = await pump(tester, m);
      await open(tester, 'activeTrack');
      await tester.tap(find.byKey(const ValueKey<String>('track-profile')));
      await tester.pump();
      await tester.tapAt(const Offset(420, 200));
      await tester.pump();
      await tester.tap(find.byKey(const ValueKey<String>('track-go')));
      await tester.pumpAndSettle();
      expect(dji.calls, isEmpty);
      expect(find.byKey(SlideToConfirmTrack.thumbKey), findsOneWidget);
      await tester.drag(find.byKey(SlideToConfirmTrack.thumbKey), const Offset(600, 0));
      await tester.pumpAndSettle();
      expect(dji.calls.single, endsWith('PROFILE)'));
    });

    testWidgets('TapFly: tap a point, set the speed, GO, Stop', (WidgetTester tester) async {
      final FlightModel m = modelWith(telemetryTick());
      final FakeDjiService dji = await pump(tester, m);
      await open(tester, 'tapFly');
      expect(find.byKey(const ValueKey<String>('tapfly-panel')), findsOneWidget);
      expect(find.byKey(const ValueKey<String>('tapfly-backward')), findsNothing, reason: 'Phantom 4 has front sensors only');

      await tester.tap(find.byKey(const ValueKey<String>('tapfly-speed-plus')));
      await tester.pump();
      await tester.tapAt(const Offset(422, 195));
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('tapfly-target')), findsOneWidget);
      await tester.tap(find.byKey(const ValueKey<String>('tapfly-go')));
      await tester.pumpAndSettle();
      expect(dji.calls.single, 'startTapFly(0.50, 0.50, FORWARD, 6, true)');

      TelemetryReducer(m).apply(tapFlyEvent('EXECUTING', execution: <String, Object?>{'imageX': 0.5, 'imageY': 0.5, 'bypass': 'NONE', 'speed': 6.0}));
      await tester.pump();
      expect(find.byKey(const ValueKey<String>('tapfly-heading')), findsOneWidget);
      await tester.tap(find.byKey(const ValueKey<String>('tapfly-speed-minus')));
      await tester.pump();
      expect(dji.calls.last, 'setTapFlySpeed(5)');
      await tester.tap(find.byKey(const ValueKey<String>('vision-stop')));
      await tester.pumpAndSettle();
      expect(dji.calls.last, 'stopTapFly');
    });
  });
}