platform_view_test.dart 106 KB
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// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
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@TestOn('!chrome')
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import 'dart:async';
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import 'dart:ui';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/gestures.dart';
import 'package:flutter/rendering.dart';
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import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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import '../services/fake_platform_views.dart';

void main() {
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  group('AndroidView', () {
    testWidgets('Create Android view', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
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        ),
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      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'webview',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
          ),
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        ]),
      );
    });

    testWidgets('Create Android view with params', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
              creationParams: 'creation parameters',
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              creationParamsCodec: StringCodec(),
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            ),
          ),
        ),
      );

      final FakeAndroidPlatformView fakeView = viewsController.views.first;
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      final Uint8List rawCreationParams = fakeView.creationParams!;
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      final ByteData byteData = ByteData.view(
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        rawCreationParams.buffer,
        rawCreationParams.offsetInBytes,
        rawCreationParams.lengthInBytes,
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      );
      final dynamic actualParams = const StringCodec().decodeMessage(byteData);

      expect(actualParams, 'creation parameters');
      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'webview',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
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            creationParams: fakeView.creationParams,
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          ),
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        ]),
      );
    });

    testWidgets('Zero sized Android view is not created', (WidgetTester tester) async {
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 0.0,
            height: 0.0,
            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
        ),
      );

      expect(
        viewsController.views,
        isEmpty,
      );
    });

    testWidgets('Resize Android view', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
        ),
      );
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      viewsController.resizeCompleter = Completer<void>();
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      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 100.0,
            height: 50.0,
            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
        ),
      );

      final Layer textureParentLayer = tester.layers[tester.layers.length - 2];
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      expect(textureParentLayer, isA<ClipRectLayer>());
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      final ClipRectLayer clipRect = textureParentLayer as ClipRectLayer;
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      expect(clipRect.clipRect, const Rect.fromLTWH(0.0, 0.0, 100.0, 50.0));
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      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'webview',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
          ),
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        ]),
      );

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      viewsController.resizeCompleter!.complete();
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      await tester.pump();

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'webview',
            const Size(100.0, 50.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
          ),
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        ]),
      );
    });

    testWidgets('Change Android view type', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      viewsController.registerViewType('maps');
      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
        ),
      );
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      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(viewType: 'maps', layoutDirection: TextDirection.ltr),
          ),
        ),
      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 2,
            'maps',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
          ),
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        ]),
      );
    });

    testWidgets('Dispose Android view', (WidgetTester tester) async {
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
        ),
      );
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      await tester.pumpWidget(
        const Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
          ),
        ),
      );

      expect(
        viewsController.views,
        isEmpty,
      );
    });

    testWidgets('Android view survives widget tree change', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      final GlobalKey key = GlobalKey();
      await tester.pumpWidget(
        Center(
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          child: SizedBox(
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            width: 200.0,
            height: 100.0,
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            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr, key: key),
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          ),
        ),
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      );
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      await tester.pumpWidget(
        Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr, key: key),
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          ),
        ),
      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'webview',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
          ),
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        ]),
      );
    });

    testWidgets('Android view gets touch events', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
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        const Align(
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          alignment: Alignment.topLeft,
          child: SizedBox(
            width: 200.0,
            height: 100.0,
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            child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
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          ),
        ),
      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionUp, <int>[0], <Offset>[Offset(50.0, 50.0)]),
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        ]),
      );
    });

    testWidgets('Android view transparent hit test behavior', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      int numPointerDownsOnParent = 0;
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: Stack(
            children: <Widget>[
              Listener(
                behavior: HitTestBehavior.opaque,
                onPointerDown: (PointerDownEvent e) {
                  numPointerDownsOnParent++;
                },
              ),
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              const Positioned(
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                child: SizedBox(
                  width: 200.0,
                  height: 100.0,
                  child: AndroidView(
                    viewType: 'webview',
                    hitTestBehavior: PlatformViewHitTestBehavior.transparent,
                    layoutDirection: TextDirection.ltr,
                  ),
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                ),
              ),
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            ],
          ),
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        ),
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      );

      await tester.startGesture(const Offset(50.0, 50.0));

      expect(
        viewsController.motionEvents[currentViewId + 1],
        isNull,
      );
      expect(
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        numPointerDownsOnParent,
        1,
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      );
    });

    testWidgets('Android view translucent hit test behavior', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      int numPointerDownsOnParent = 0;
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: Stack(
            children: <Widget>[
              Listener(
                behavior: HitTestBehavior.opaque,
                onPointerDown: (PointerDownEvent e) {
                  numPointerDownsOnParent++;
                },
              ),
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              const Positioned(
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                child: SizedBox(
                  width: 200.0,
                  height: 100.0,
                  child: AndroidView(
                    viewType: 'webview',
                    hitTestBehavior: PlatformViewHitTestBehavior.translucent,
                    layoutDirection: TextDirection.ltr,
                  ),
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                ),
              ),
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            ],
          ),
        ),
      );

      await tester.startGesture(const Offset(50.0, 50.0));

      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
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        ]),
      );
      expect(
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        numPointerDownsOnParent,
        1,
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      );
    });

    testWidgets('Android view opaque hit test behavior', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      int numPointerDownsOnParent = 0;
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: Stack(
            children: <Widget>[
              Listener(
                behavior: HitTestBehavior.opaque,
                onPointerDown: (PointerDownEvent e) {
                  numPointerDownsOnParent++;
                },
              ),
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              const Positioned(
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                child: SizedBox(
                  width: 200.0,
                  height: 100.0,
                  child: AndroidView(
                    viewType: 'webview',
                    layoutDirection: TextDirection.ltr,
                  ),
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                ),
              ),
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            ],
          ),
        ),
      );

      await tester.startGesture(const Offset(50.0, 50.0));

      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
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        ]),
      );
      expect(
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        numPointerDownsOnParent,
        0,
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      );
    });

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    testWidgets("Android view touch events are in virtual display's coordinate system", (WidgetTester tester) async {
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      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: Container(
            margin: const EdgeInsets.all(10.0),
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            child: const SizedBox(
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              width: 200.0,
              height: 100.0,
              child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
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            ),
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          ),
        ),
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      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(40.0, 40.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionUp, <int>[0], <Offset>[Offset(40.0, 40.0)]),
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        ]),
      );
    });

    testWidgets('Android view directionality', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('maps');
      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
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            child: AndroidView(viewType: 'maps', layoutDirection: TextDirection.rtl),
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          ),
        ),
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      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'maps',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionRtl,
          ),
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        ]),
      );

      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
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            child: AndroidView(viewType: 'maps', layoutDirection: TextDirection.ltr),
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          ),
        ),
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      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'maps',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
          ),
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        ]),
      );
    });

    testWidgets('Android view ambient directionality', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('maps');
      await tester.pumpWidget(
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        const Directionality(
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          textDirection: TextDirection.rtl,
          child: Center(
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: AndroidView(viewType: 'maps'),
            ),
          ),
        ),
      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'maps',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionRtl,
          ),
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        ]),
      );

      await tester.pumpWidget(
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        const Directionality(
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          textDirection: TextDirection.ltr,
          child: Center(
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: AndroidView(viewType: 'maps'),
            ),
          ),
        ),
      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeAndroidPlatformView>[
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          FakeAndroidPlatformView(
            currentViewId + 1,
            'maps',
            const Size(200.0, 100.0),
            AndroidViewController.kAndroidLayoutDirectionLtr,
          ),
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        ]),
      );
    });

    testWidgets('Android view can lose gesture arenas', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      bool verticalDragAcceptedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: Container(
            margin: const EdgeInsets.all(10.0),
            child: GestureDetector(
              onVerticalDragStart: (DragStartDetails d) {
                verticalDragAcceptedByParent = true;
              },
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              child: const SizedBox(
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                width: 200.0,
                height: 100.0,
                child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
              ),
            ),
          ),
        ),
      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, true);
      expect(
        viewsController.motionEvents[currentViewId + 1],
        isNull,
      );
    });

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    testWidgets('Android view drag gesture recognizer', (WidgetTester tester) async {
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      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      bool verticalDragAcceptedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
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          child: GestureDetector(
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            onVerticalDragStart: (DragStartDetails d) {
              verticalDragAcceptedByParent = true;
            },
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            child: SizedBox(
              width: 200.0,
              height: 100.0,
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              child: AndroidView(
                viewType: 'webview',
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                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
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                  Factory<VerticalDragGestureRecognizer>(
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                    () {
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                      return VerticalDragGestureRecognizer();
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                    },
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                  ),
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                },
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                layoutDirection: TextDirection.ltr,
              ),
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            ),
          ),
        ),
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      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, false);
      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionMove, <int>[0], <Offset>[Offset(50.0, 150.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionUp, <int>[0], <Offset>[Offset(50.0, 150.0)]),
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        ]),
      );
    });

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    testWidgets('Android view long press gesture recognizer', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      bool longPressAccessedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onLongPress: () {
              longPressAccessedByParent = true;
            },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: AndroidView(
                viewType: 'webview',
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
                  Factory<LongPressGestureRecognizer>(
                    () {
                      return LongPressGestureRecognizer();
                    },
                  ),
                },
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      await tester.longPressAt(const Offset(50.0, 50.0));

      expect(longPressAccessedByParent, false);
      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionUp, <int>[0], <Offset>[Offset(50.0, 50.0)]),
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        ]),
      );
    });

    testWidgets('Android view tap gesture recognizer', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      bool tapAccessedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onTap: () {
              tapAccessedByParent = true;
            },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: AndroidView(
                viewType: 'webview',
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
                  Factory<TapGestureRecognizer>(
                    () {
                      return TapGestureRecognizer();
                    },
                  ),
                },
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      await tester.tapAt(const Offset(50.0, 50.0));

      expect(tapAccessedByParent, false);
      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionUp, <int>[0], <Offset>[Offset(50.0, 50.0)]),
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        ]),
      );
    });

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    testWidgets('Android view can claim gesture after all pointers are up', (WidgetTester tester) async {
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      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      bool verticalDragAcceptedByParent = false;
      // The long press recognizer rejects the gesture after the AndroidView gets the pointer up event.
      // This test makes sure that the Android view can win the gesture after it got the pointer up event.
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onVerticalDragStart: (DragStartDetails d) {
              verticalDragAcceptedByParent = true;
            },
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            onLongPress: () { },
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            child: const SizedBox(
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              width: 200.0,
              height: 100.0,
              child: AndroidView(
                viewType: 'webview',
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, false);
      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionUp, <int>[0], <Offset>[Offset(50.0, 50.0)]),
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        ]),
      );
    });

    testWidgets('Android view rebuilt during gesture', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
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        const Align(
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          alignment: Alignment.topLeft,
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
            ),
          ),
        ),
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      );
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      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));
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      await tester.pumpWidget(
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        const Align(
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          alignment: Alignment.topLeft,
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
            ),
          ),
        ),
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      );

      await gesture.up();

      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionMove, <int>[0], <Offset>[Offset(50.0, 150.0)]),
          const FakeAndroidMotionEvent(AndroidViewController.kActionUp, <int>[0], <Offset>[Offset(50.0, 150.0)]),
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        ]),
      );
    });

    testWidgets('Android view with eager gesture recognizer', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
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            onVerticalDragStart: (DragStartDetails d) { },
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            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: AndroidView(
                viewType: 'webview',
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                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
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                  Factory<OneSequenceGestureRecognizer>(
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                    () => EagerGestureRecognizer(),
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                  ),
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                },
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                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      await tester.startGesture(const Offset(50.0, 50.0));

      // Normally (without the eager gesture recognizer) after just the pointer down event
      // no gesture arena member will claim the arena (so no motion events will be dispatched to
      // the Android view). Here we assert that with the eager recognizer in the gesture team the
      // pointer down event is immediately dispatched.
      expect(
        viewsController.motionEvents[currentViewId + 1],
        orderedEquals(<FakeAndroidMotionEvent>[
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          const FakeAndroidMotionEvent(AndroidViewController.kActionDown, <int>[0], <Offset>[Offset(50.0, 50.0)]),
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        ]),
      );
    });

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    // This test makes sure it doesn't crash.
    // https://github.com/flutter/flutter/issues/21514
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    testWidgets(
      'RenderAndroidView reconstructed with same gestureRecognizers does not crash',
      (WidgetTester tester) async {
        final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
        viewsController.registerViewType('webview');
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        final AndroidView androidView = AndroidView(
          viewType: 'webview',
          gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
            Factory<EagerGestureRecognizer>(
              () => EagerGestureRecognizer(),
            ),
          },
          layoutDirection: TextDirection.ltr,
        );
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        await tester.pumpWidget(androidView);
        await tester.pumpWidget(const SizedBox.shrink());
        await tester.pumpWidget(androidView);
      },
    );
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    testWidgets('AndroidView rebuilt with same gestureRecognizers', (WidgetTester tester) async {
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');
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      int factoryInvocationCount = 0;
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      EagerGestureRecognizer constructRecognizer() {
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        factoryInvocationCount += 1;
        return EagerGestureRecognizer();
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      }
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      await tester.pumpWidget(
        AndroidView(
          viewType: 'webview',
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          gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
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            Factory<EagerGestureRecognizer>(constructRecognizer),
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          },
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          layoutDirection: TextDirection.ltr,
        ),
      );

      await tester.pumpWidget(
        AndroidView(
          viewType: 'webview',
          hitTestBehavior: PlatformViewHitTestBehavior.translucent,
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          gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
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            Factory<EagerGestureRecognizer>(constructRecognizer),
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          },
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          layoutDirection: TextDirection.ltr,
        ),
      );

      expect(factoryInvocationCount, 1);
    });
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    testWidgets('AndroidView has correct semantics', (WidgetTester tester) async {
      final SemanticsHandle handle = tester.ensureSemantics();
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      expect(currentViewId, greaterThanOrEqualTo(0));
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      viewsController.createCompleter = Completer<void>();

      await tester.pumpWidget(
        Semantics(
          container: true,
          child: const Align(
            alignment: Alignment.bottomRight,
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: AndroidView(
                viewType: 'webview',
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

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      // Find the first _AndroidPlatformView widget inside of the AndroidView so
      // that it finds the right RenderObject when looking for semantics.
      final Finder semanticsFinder = find.byWidgetPredicate(
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        (Widget widget) {
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          return widget.runtimeType.toString() == '_AndroidPlatformView';
        },
        description: '_AndroidPlatformView widget inside AndroidView',
      );
      final SemanticsNode semantics = tester.getSemantics(semanticsFinder.first);
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      // Platform view has not been created yet, no platformViewId.
      expect(semantics.platformViewId, null);
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      expect(semantics.rect, const Rect.fromLTWH(0, 0, 200, 100));
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      // A 200x100 rect positioned at bottom right of a 800x600 box.
      expect(semantics.transform, Matrix4.translationValues(600, 500, 0));
      expect(semantics.childrenCount, 0);

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      viewsController.createCompleter!.complete();
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      await tester.pumpAndSettle();

      expect(semantics.platformViewId, currentViewId + 1);
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      expect(semantics.rect, const Rect.fromLTWH(0, 0, 200, 100));
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      // A 200x100 rect positioned at bottom right of a 800x600 box.
      expect(semantics.transform, Matrix4.translationValues(600, 500, 0));
      expect(semantics.childrenCount, 0);

      handle.dispose();
    });
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    testWidgets('AndroidView can take input focus', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      viewsController.createCompleter = Completer<void>();

      final GlobalKey containerKey = GlobalKey();
      await tester.pumpWidget(
        Center(
          child: Column(
            children: <Widget>[
              const SizedBox(
                width: 200.0,
                height: 100.0,
                child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
              ),
              Focus(
                debugLabel: 'container',
                child: Container(key: containerKey),
              ),
            ],
          ),
        ),
      );

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      final Focus androidViewFocusWidget = tester.widget(
        find.descendant(
          of: find.byType(AndroidView),
          matching: find.byType(Focus),
        ),
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      );
      final Element containerElement = tester.element(find.byKey(containerKey));
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      final FocusNode androidViewFocusNode = androidViewFocusWidget.focusNode!;
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      final FocusNode containerFocusNode = Focus.of(containerElement);
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      containerFocusNode.requestFocus();

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      viewsController.createCompleter!.complete();
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      await tester.pump();

      expect(containerFocusNode.hasFocus, isTrue);
      expect(androidViewFocusNode.hasFocus, isFalse);

      viewsController.invokeViewFocused(currentViewId + 1);

      await tester.pump();

      expect(containerFocusNode.hasFocus, isFalse);
      expect(androidViewFocusNode.hasFocus, isTrue);
    });
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    testWidgets('AndroidView sets a platform view text input client when focused', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      viewsController.createCompleter = Completer<void>();

      final GlobalKey containerKey = GlobalKey();
      await tester.pumpWidget(
        Center(
          child: Column(
            children: <Widget>[
              const SizedBox(
                width: 200.0,
                height: 100.0,
                child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
              ),
              Focus(
                debugLabel: 'container',
                child: Container(key: containerKey),
              ),
            ],
          ),
        ),
      );

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      viewsController.createCompleter!.complete();
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      final Element containerElement = tester.element(find.byKey(containerKey));
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      final FocusNode containerFocusNode = Focus.of(containerElement);
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      containerFocusNode.requestFocus();
      await tester.pump();

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      late Map<String, dynamic> lastPlatformViewTextClient;
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      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.textInput, (MethodCall call) {
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        if (call.method == 'TextInput.setPlatformViewClient') {
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          lastPlatformViewTextClient = call.arguments as Map<String, dynamic>;
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        }
        return null;
      });

      viewsController.invokeViewFocused(currentViewId + 1);
      await tester.pump();

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      expect(lastPlatformViewTextClient.containsKey('platformViewId'), true);
      expect(lastPlatformViewTextClient['platformViewId'], currentViewId + 1);
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    });

    testWidgets('AndroidView clears platform focus when unfocused', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      viewsController.createCompleter = Completer<void>();

      final GlobalKey containerKey = GlobalKey();
      await tester.pumpWidget(
        Center(
          child: Column(
            children: <Widget>[
              const SizedBox(
                width: 200.0,
                height: 100.0,
                child: AndroidView(viewType: 'webview', layoutDirection: TextDirection.ltr),
              ),
              Focus(
                debugLabel: 'container',
                child: Container(key: containerKey),
              ),
            ],
          ),
        ),
      );

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      viewsController.createCompleter!.complete();
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      final Element containerElement = tester.element(find.byKey(containerKey));
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      final FocusNode containerFocusNode = Focus.of(containerElement);
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      containerFocusNode.requestFocus();
      await tester.pump();

      viewsController.invokeViewFocused(currentViewId + 1);
      await tester.pump();

      viewsController.lastClearedFocusViewId = null;

      containerFocusNode.requestFocus();
      await tester.pump();

      expect(viewsController.lastClearedFocusViewId, currentViewId + 1);
    });
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    testWidgets('can set and update clipBehavior', (WidgetTester tester) async {
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
        const Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: AndroidView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
            ),
          ),
        ),
      );

      // By default, clipBehavior should be Clip.hardEdge
      final RenderAndroidView renderObject = tester.renderObject(
        find.descendant(
          of: find.byType(AndroidView),
          matching: find.byWidgetPredicate(
            (Widget widget) => widget.runtimeType.toString() == '_AndroidPlatformView',
          ),
        ),
      );
      expect(renderObject.clipBehavior, equals(Clip.hardEdge));

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      for (final Clip clip in Clip.values) {
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        await tester.pumpWidget(
          Center(
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: AndroidView(
                viewType: 'webview',
                layoutDirection: TextDirection.ltr,
                clipBehavior: clip,
              ),
            ),
          ),
        );
        expect(renderObject.clipBehavior, clip);
      }
    });
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    testWidgets('clip is handled correctly during resizing', (WidgetTester tester) async {
      // Regressing test for https://github.com/flutter/flutter/issues/67343
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      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

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      Widget buildView(double width, double height, Clip clipBehavior) {
        return Center(
          child: SizedBox(
            width: width,
            height: height,
            child: AndroidView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
              clipBehavior: clipBehavior,
            ),
          ),
        );
      }

      await tester.pumpWidget(buildView(200.0, 200.0, Clip.none));
      // Resize the view.
      await tester.pumpWidget(buildView(100.0, 100.0, Clip.none));
      // No clip happen when the clip behavior is `Clip.none` .
      expect(tester.layers.whereType<ClipRectLayer>(), hasLength(0));

      // No clip when only the clip behavior changes while the size remains the same.
      await tester.pumpWidget(buildView(100.0, 100.0, Clip.hardEdge));
      expect(tester.layers.whereType<ClipRectLayer>(), hasLength(0));

      // Resize trigger clip when the clip behavior is not `Clip.none` .
      await tester.pumpWidget(buildView(50.0, 100.0, Clip.hardEdge));
      expect(tester.layers.whereType<ClipRectLayer>(), hasLength(1));
      ClipRectLayer clipRectLayer = tester.layers.whereType<ClipRectLayer>().first;
      expect(clipRectLayer.clipRect, const Rect.fromLTWH(0.0, 0.0, 50.0, 100.0));

      await tester.pumpWidget(buildView(50.0, 50.0, Clip.hardEdge));
      expect(tester.layers.whereType<ClipRectLayer>(), hasLength(1));
      clipRectLayer = tester.layers.whereType<ClipRectLayer>().first;
      expect(clipRectLayer.clipRect, const Rect.fromLTWH(0.0, 0.0, 50.0, 50.0));
    });
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    testWidgets('offset is sent to the platform', (WidgetTester tester) async {
      final FakeAndroidPlatformViewsController viewsController = FakeAndroidPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
        const Padding(
          padding: EdgeInsets.fromLTRB(10, 20, 0, 0),
          child: AndroidView(
            viewType: 'webview',
            layoutDirection: TextDirection.ltr,
          ),
        ),
      );

      await tester.pump();
      expect(viewsController.offsets.values, equals(<Offset>[const Offset(10, 20)]));
    });
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  });

  group('AndroidViewSurface', () {
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    late FakeAndroidViewController controller;
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    setUp(() {
      controller = FakeAndroidViewController(0);
    });

    testWidgets('AndroidViewSurface sets pointTransformer of view controller', (WidgetTester tester) async {
      final AndroidViewSurface surface = AndroidViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
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        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      );
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      await tester.pumpWidget(surface);
      expect(controller.pointTransformer, isNotNull);
    });
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    testWidgets('AndroidViewSurface defaults to texture-based rendering', (WidgetTester tester) async {
      final AndroidViewSurface surface = AndroidViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      );
      await tester.pumpWidget(surface);

      expect(find.byWidgetPredicate(
        (Widget widget) => widget.runtimeType.toString() == '_TextureBasedAndroidViewSurface',
      ), findsOneWidget);
    });

    testWidgets('AndroidViewSurface uses view-based rendering when initially required', (WidgetTester tester) async {
      controller.requiresViewComposition = true;
      final AndroidViewSurface surface = AndroidViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      );
      await tester.pumpWidget(surface);

      expect(find.byWidgetPredicate(
        (Widget widget) => widget.runtimeType.toString() == '_PlatformLayerBasedAndroidViewSurface',
      ), findsOneWidget);
    });

    testWidgets('AndroidViewSurface can switch to view-based rendering after creation', (WidgetTester tester) async {
      final AndroidViewSurface surface = AndroidViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      );
      await tester.pumpWidget(surface);

      expect(find.byWidgetPredicate(
        (Widget widget) => widget.runtimeType.toString() == '_TextureBasedAndroidViewSurface',
      ), findsOneWidget);
      expect(find.byWidgetPredicate(
        (Widget widget) => widget.runtimeType.toString() == '_PlatformLayerBasedAndroidViewSurface',
      ), findsNothing);

      // Simulate a creation-time switch to view composition.
      controller.requiresViewComposition = true;
      for (final PlatformViewCreatedCallback callback in controller.createdCallbacks) {
        callback(controller.viewId);
      }
      await tester.pumpWidget(surface);

      expect(find.byWidgetPredicate(
        (Widget widget) => widget.runtimeType.toString() == '_TextureBasedAndroidViewSurface',
      ), findsNothing);
      expect(find.byWidgetPredicate(
        (Widget widget) => widget.runtimeType.toString() == '_PlatformLayerBasedAndroidViewSurface',
      ), findsOneWidget);
    });
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  });
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  group('UiKitView', () {
    testWidgets('Create UIView', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
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            child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
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          ),
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        ),
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      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeUiKitView>[
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          FakeUiKitView(currentViewId + 1, 'webview'),
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        ]),
      );
    });

    testWidgets('Change UIView view type', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      viewsController.registerViewType('maps');
      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
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        ),
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      );
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      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(viewType: 'maps', layoutDirection: TextDirection.ltr),
          ),
        ),
      );

      expect(
        viewsController.views,
        unorderedEquals(<FakeUiKitView>[
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          FakeUiKitView(currentViewId + 2, 'maps'),
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        ]),
      );
    });

    testWidgets('Dispose UIView ', (WidgetTester tester) async {
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
        ),
      );
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      await tester.pumpWidget(
        const Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
          ),
        ),
      );

      expect(
        viewsController.views,
        isEmpty,
      );
    });

    testWidgets('Dispose UIView before creation completed ', (WidgetTester tester) async {
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      viewsController.creationDelay = Completer<void>();
      await tester.pumpWidget(
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        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
          ),
        ),
      );
1407

1408 1409 1410 1411 1412 1413 1414 1415 1416
      await tester.pumpWidget(
        const Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
          ),
        ),
      );

1417
      viewsController.creationDelay!.complete();
1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438

      expect(
        viewsController.views,
        isEmpty,
      );
    });

    testWidgets('UIView survives widget tree change', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      final GlobalKey key = GlobalKey();
      await tester.pumpWidget(
        Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr, key: key),
          ),
        ),
      );
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1440 1441
      await tester.pumpWidget(
        Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr, key: key),
1446 1447 1448
          ),
        ),
      );
1449

1450 1451 1452
      expect(
        viewsController.views,
        unorderedEquals(<FakeUiKitView>[
1453
          FakeUiKitView(currentViewId + 1, 'webview'),
1454 1455 1456
        ]),
      );
    });
1457

1458 1459 1460 1461 1462 1463
    testWidgets('Create UIView with params', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
1464
        const Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
              creationParams: 'creation parameters',
1472
              creationParamsCodec: StringCodec(),
1473 1474 1475 1476 1477 1478
            ),
          ),
        ),
      );

      final FakeUiKitView fakeView = viewsController.views.first;
1479
      final Uint8List rawCreationParams = fakeView.creationParams!;
1480
      final ByteData byteData = ByteData.view(
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        rawCreationParams.buffer,
        rawCreationParams.offsetInBytes,
        rawCreationParams.lengthInBytes,
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      );
      final dynamic actualParams = const StringCodec().decodeMessage(byteData);

      expect(actualParams, 'creation parameters');
      expect(
        viewsController.views,
        unorderedEquals(<FakeUiKitView>[
1491
          FakeUiKitView(currentViewId + 1, 'webview', fakeView.creationParams),
1492 1493 1494 1495
        ]),
      );
    });

1496 1497 1498 1499 1500 1501
    testWidgets('UiKitView accepts gestures', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
1502
        const Align(
1503 1504 1505 1506
          alignment: Alignment.topLeft,
          child: SizedBox(
            width: 200.0,
            height: 100.0,
1507
            child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
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          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      expect(viewsController.gesturesAccepted[currentViewId + 1], 0);

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
    });

    testWidgets('UiKitView transparent hit test behavior', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      int numPointerDownsOnParent = 0;
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: Stack(
            children: <Widget>[
              Listener(
                behavior: HitTestBehavior.opaque,
                onPointerDown: (PointerDownEvent e) {
                  numPointerDownsOnParent++;
                },
              ),
1541
              const Positioned(
1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585
                child: SizedBox(
                  width: 200.0,
                  height: 100.0,
                  child: UiKitView(
                    viewType: 'webview',
                    hitTestBehavior: PlatformViewHitTestBehavior.transparent,
                    layoutDirection: TextDirection.ltr,
                  ),
                ),
              ),
            ],
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(viewsController.gesturesAccepted[currentViewId + 1], 0);

      expect(numPointerDownsOnParent, 1);
    });

    testWidgets('UiKitView translucent hit test behavior', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      int numPointerDownsOnParent = 0;
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: Stack(
            children: <Widget>[
              Listener(
                behavior: HitTestBehavior.opaque,
                onPointerDown: (PointerDownEvent e) {
                  numPointerDownsOnParent++;
                },
              ),
1586
              const Positioned(
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                child: SizedBox(
                  width: 200.0,
                  height: 100.0,
                  child: UiKitView(
                    viewType: 'webview',
                    hitTestBehavior: PlatformViewHitTestBehavior.translucent,
                    layoutDirection: TextDirection.ltr,
                  ),
                ),
              ),
            ],
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);

      expect(numPointerDownsOnParent, 1);
    });

    testWidgets('UiKitView opaque hit test behavior', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      int numPointerDownsOnParent = 0;
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: Stack(
            children: <Widget>[
              Listener(
                behavior: HitTestBehavior.opaque,
                onPointerDown: (PointerDownEvent e) {
                  numPointerDownsOnParent++;
                },
              ),
1631
              const Positioned(
1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671
                child: SizedBox(
                  width: 200.0,
                  height: 100.0,
                  child: UiKitView(
                    viewType: 'webview',
                    layoutDirection: TextDirection.ltr,
                  ),
                ),
              ),
            ],
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
      expect(numPointerDownsOnParent, 0);
    });

    testWidgets('UiKitView can lose gesture arenas', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      bool verticalDragAcceptedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: Container(
            margin: const EdgeInsets.all(10.0),
            child: GestureDetector(
              onVerticalDragStart: (DragStartDetails d) {
                verticalDragAcceptedByParent = true;
              },
1672
              child: const SizedBox(
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                width: 200.0,
                height: 100.0,
                child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
              ),
            ),
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, true);
      expect(viewsController.gesturesAccepted[currentViewId + 1], 0);
1692
      expect(viewsController.gesturesRejected[currentViewId + 1], 1);
1693 1694
    });

1695
    testWidgets('UiKitView tap gesture recognizers', (WidgetTester tester) async {
1696 1697 1698
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
1699
      bool gestureAcceptedByParent = false;
1700 1701 1702 1703 1704
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onVerticalDragStart: (DragStartDetails d) {
1705
              gestureAcceptedByParent = true;
1706 1707 1708 1709 1710 1711
            },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: UiKitView(
                viewType: 'webview',
1712
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
1713
                  Factory<VerticalDragGestureRecognizer>(
1714
                    () {
1715
                      return VerticalDragGestureRecognizer();
1716
                    },
1717
                  ),
1718
                },
1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));
      await gesture.up();

1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817
      expect(gestureAcceptedByParent, false);
      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
      expect(viewsController.gesturesRejected[currentViewId + 1], 0);
    });

    testWidgets('UiKitView long press gesture recognizers', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      bool gestureAcceptedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onLongPress: () {
              gestureAcceptedByParent = true;
            },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: UiKitView(
                viewType: 'webview',
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
                  Factory<LongPressGestureRecognizer>(
                    () {
                      return LongPressGestureRecognizer();
                    },
                  ),
                },
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      await tester.longPressAt(const Offset(50.0, 50.0));

      expect(gestureAcceptedByParent, false);
      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
      expect(viewsController.gesturesRejected[currentViewId + 1], 0);
    });

    testWidgets('UiKitView drag gesture recognizers', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      bool verticalDragAcceptedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onVerticalDragStart: (DragStartDetails d) {
              verticalDragAcceptedByParent = true;
            },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: UiKitView(
                viewType: 'webview',
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
                  Factory<TapGestureRecognizer>(
                    () {
                      return TapGestureRecognizer();
                    },
                  ),
                },
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      await tester.tapAt(const Offset(50.0, 50.0));

1818 1819
      expect(verticalDragAcceptedByParent, false);
      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
1820
      expect(viewsController.gesturesRejected[currentViewId + 1], 0);
1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
    });

    testWidgets('UiKitView can claim gesture after all pointers are up', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      bool verticalDragAcceptedByParent = false;
      // The long press recognizer rejects the gesture after the AndroidView gets the pointer up event.
      // This test makes sure that the Android view can win the gesture after it got the pointer up event.
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onVerticalDragStart: (DragStartDetails d) {
              verticalDragAcceptedByParent = true;
            },
1837
            onLongPress: () { },
1838
            child: const SizedBox(
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
              width: 200.0,
              height: 100.0,
              child: UiKitView(
                viewType: 'webview',
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, false);

      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
1860
      expect(viewsController.gesturesRejected[currentViewId + 1], 0);
1861 1862 1863 1864 1865 1866 1867
    });

    testWidgets('UiKitView rebuilt during gesture', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
1868
        const Align(
1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888
          alignment: Alignment.topLeft,
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
            ),
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));

      await tester.pumpWidget(
1889
        const Align(
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904
          alignment: Alignment.topLeft,
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: UiKitView(
              viewType: 'webview',
              layoutDirection: TextDirection.ltr,
            ),
          ),
        ),
      );

      await gesture.up();

      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
1905
      expect(viewsController.gesturesRejected[currentViewId + 1], 0);
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
    });

    testWidgets('UiKitView with eager gesture recognizer', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
1916
            onVerticalDragStart: (DragStartDetails d) { },
1917 1918 1919 1920 1921
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: UiKitView(
                viewType: 'webview',
1922
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
1923
                  Factory<OneSequenceGestureRecognizer>(
1924
                    () => EagerGestureRecognizer(),
1925
                  ),
1926
                },
1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      await tester.startGesture(const Offset(50.0, 50.0));

      // Normally (without the eager gesture recognizer) after just the pointer down event
      // no gesture arena member will claim the arena (so no motion events will be dispatched to
      // the Android view). Here we assert that with the eager recognizer in the gesture team the
      // pointer down event is immediately dispatched.
      expect(viewsController.gesturesAccepted[currentViewId + 1], 1);
1945
      expect(viewsController.gesturesRejected[currentViewId + 1], 0);
1946 1947
    });

1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
    testWidgets('UiKitView rejects gestures absorbed by siblings', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
        Stack(
          alignment: Alignment.topLeft,
          children: <Widget>[
            const UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
            Container(
              color: const Color.fromARGB(255, 255, 255, 255),
              width: 100,
              height: 100,
            ),
          ],
1964
        ),
1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(viewsController.gesturesRejected[currentViewId + 1], 1);
      expect(viewsController.gesturesAccepted[currentViewId + 1], 0);
    });

1978 1979 1980 1981 1982 1983 1984 1985 1986
    testWidgets(
      'UiKitView rejects gestures absorbed by siblings if the touch is outside of the platform view bounds but inside platform view frame',
      (WidgetTester tester) async {
        // UiKitView is positioned at (left=0, top=100, right=300, bottom=600).
        // Opaque container is on top of the UiKitView positioned at (left=0, top=500, right=300, bottom=600).
        // Touch on (550, 150) is expected to be absorbed by the container.
        final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
        final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
        viewsController.registerViewType('webview');
1987

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
        await tester.pumpWidget(
          SizedBox(
            width: 300,
            height: 600,
            child: Stack(
              alignment: Alignment.topLeft,
              children: <Widget>[
                Transform.translate(
                  offset: const Offset(0, 100),
                  child: const SizedBox(
                    width: 300,
                    height: 500,
                    child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
                  ),
2002
                ),
2003 2004 2005 2006 2007 2008 2009
                Transform.translate(
                  offset: const Offset(0, 500),
                  child: Container(
                    color: const Color.fromARGB(255, 255, 255, 255),
                    width: 300,
                    height: 100,
                  ),
2010
                ),
2011 2012
              ],
            ),
2013
          ),
2014
        );
2015

2016 2017 2018
        // First frame is before the platform view was created so the render object
        // is not yet in the tree.
        await tester.pump();
2019

2020 2021
        final TestGesture gesture = await tester.startGesture(const Offset(150, 550));
        await gesture.up();
2022

2023 2024 2025 2026
        expect(viewsController.gesturesRejected[currentViewId + 1], 1);
        expect(viewsController.gesturesAccepted[currentViewId + 1], 0);
      },
    );
2027

2028
    testWidgets('UiKitView rebuilt with same gestureRecognizers', (WidgetTester tester) async {
2029 2030 2031 2032
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      int factoryInvocationCount = 0;
2033
      EagerGestureRecognizer constructRecognizer() {
2034 2035
        factoryInvocationCount += 1;
        return EagerGestureRecognizer();
2036
      }
2037 2038 2039 2040

      await tester.pumpWidget(
        UiKitView(
          viewType: 'webview',
2041
          gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
2042
            Factory<EagerGestureRecognizer>(constructRecognizer),
2043
          },
2044 2045 2046 2047 2048 2049 2050 2051
          layoutDirection: TextDirection.ltr,
        ),
      );

      await tester.pumpWidget(
        UiKitView(
          viewType: 'webview',
          hitTestBehavior: PlatformViewHitTestBehavior.translucent,
2052
          gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
2053
            Factory<EagerGestureRecognizer>(constructRecognizer),
2054
          },
2055 2056 2057 2058 2059 2060
          layoutDirection: TextDirection.ltr,
        ),
      );

      expect(factoryInvocationCount, 1);
    });
2061

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    testWidgets('UiKitView can take input focus', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      final GlobalKey containerKey = GlobalKey();
      await tester.pumpWidget(
        Center(
          child: Column(
            children: <Widget>[
              const SizedBox(
                width: 200.0,
                height: 100.0,
                child: UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr),
              ),
              Focus(
                debugLabel: 'container',
                child: Container(key: containerKey),
              ),
            ],
          ),
        ),
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final Focus uiKitViewFocusWidget = tester.widget(
        find.descendant(
          of: find.byType(UiKitView),
          matching: find.byType(Focus),
        ),
      );
      final FocusNode uiKitViewFocusNode = uiKitViewFocusWidget.focusNode!;
      final Element containerElement = tester.element(find.byKey(containerKey));
      final FocusNode containerFocusNode = Focus.of(containerElement);

      containerFocusNode.requestFocus();

      await tester.pump();

      expect(containerFocusNode.hasFocus, isTrue);
      expect(uiKitViewFocusNode.hasFocus, isFalse);

      viewsController.invokeViewFocused(currentViewId + 1);

      await tester.pump();

      expect(containerFocusNode.hasFocus, isFalse);
      expect(uiKitViewFocusNode.hasFocus, isTrue);
    });

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    testWidgets('UiKitView sends TextInput.setPlatformViewClient when focused', (WidgetTester tester) async {

      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
        const UiKitView(viewType: 'webview', layoutDirection: TextDirection.ltr)
      );

      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

      final Focus uiKitViewFocusWidget = tester.widget(
        find.descendant(
          of: find.byType(UiKitView),
          matching: find.byType(Focus),
        ),
      );
      final FocusNode uiKitViewFocusNode = uiKitViewFocusWidget.focusNode!;

      late Map<String, dynamic> channelArguments;
      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.textInput, (MethodCall call) {
        if (call.method == 'TextInput.setPlatformViewClient') {
          channelArguments = call.arguments as Map<String, dynamic>;
        }
        return null;
      });

      expect(uiKitViewFocusNode.hasFocus, false);

      uiKitViewFocusNode.requestFocus();
      await tester.pump();

      expect(uiKitViewFocusNode.hasFocus, true);
      expect(channelArguments['platformViewId'], currentViewId + 1);
    });

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    testWidgets('UiKitView has correct semantics', (WidgetTester tester) async {
      final SemanticsHandle handle = tester.ensureSemantics();
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      expect(currentViewId, greaterThanOrEqualTo(0));
      final FakeIosPlatformViewsController viewsController = FakeIosPlatformViewsController();
      viewsController.registerViewType('webview');

      await tester.pumpWidget(
        Semantics(
          container: true,
          child: const Align(
            alignment: Alignment.bottomRight,
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: UiKitView(
                viewType: 'webview',
                layoutDirection: TextDirection.ltr,
              ),
            ),
          ),
        ),
      );
      // First frame is before the platform view was created so the render object
      // is not yet in the tree.
      await tester.pump();

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      final SemanticsNode semantics = tester.getSemantics(
        find.descendant(
          of: find.byType(UiKitView),
          matching: find.byWidgetPredicate(
              (Widget widget) => widget.runtimeType.toString() == '_UiKitPlatformView',
          ),
        ),
      );
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      expect(semantics.platformViewId, currentViewId + 1);
Dan Field's avatar
Dan Field committed
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      expect(semantics.rect, const Rect.fromLTWH(0, 0, 200, 100));
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      // A 200x100 rect positioned at bottom right of a 800x600 box.
      expect(semantics.transform, Matrix4.translationValues(600, 500, 0));
      expect(semantics.childrenCount, 0);

      handle.dispose();
    });
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  });
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  group('Common PlatformView', () {
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    late FakePlatformViewController controller;
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    setUp(() {
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      controller = FakePlatformViewController(0);
    });

    testWidgets('PlatformViewSurface should create platform view layer', (WidgetTester tester) async {
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      final PlatformViewSurface surface = PlatformViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
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        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      );
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      await tester.pumpWidget(surface);
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      expect(() => tester.layers.whereType<PlatformViewLayer>().first, returnsNormally);
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    });
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    testWidgets('PlatformViewSurface can lose gesture arenas', (WidgetTester tester) async {
      bool verticalDragAcceptedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: Container(
            margin: const EdgeInsets.all(10.0),
            child: GestureDetector(
              onVerticalDragStart: (DragStartDetails d) {
                verticalDragAcceptedByParent = true;
              },
              child: SizedBox(
                width: 200.0,
                height: 100.0,
                child: PlatformViewSurface(
                  controller: controller,
                  gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
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                  hitTestBehavior: PlatformViewHitTestBehavior.opaque,
                ),
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              ),
            ),
          ),
        ),
      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, true);
      expect(
        controller.dispatchedPointerEvents,
        isEmpty,
      );
    });

    testWidgets('PlatformViewSurface gesture recognizers dispatch events', (WidgetTester tester) async {
      bool verticalDragAcceptedByParent = false;
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onVerticalDragStart: (DragStartDetails d) {
              verticalDragAcceptedByParent = true;
            },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: PlatformViewSurface(
                controller: controller,
                hitTestBehavior: PlatformViewHitTestBehavior.opaque,
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
                  Factory<VerticalDragGestureRecognizer>(
                    () {
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                      return VerticalDragGestureRecognizer();
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                    },
                  ),
                },
              ),
            ),
          ),
        ),
      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, false);
      expect(
        controller.dispatchedPointerEvents.length,
        3,
      );
    });

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    testWidgets('PlatformViewSurface can claim gesture after all pointers are up', (WidgetTester tester) async {
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      bool verticalDragAcceptedByParent = false;
      // The long press recognizer rejects the gesture after the PlatformViewSurface gets the pointer up event.
      // This test makes sure that the PlatformViewSurface can win the gesture after it got the pointer up event.
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onVerticalDragStart: (DragStartDetails d) {
              verticalDragAcceptedByParent = true;
            },
            onLongPress: () { },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: PlatformViewSurface(
                controller: controller,
                hitTestBehavior: PlatformViewHitTestBehavior.opaque,
                gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
              ),
            ),
          ),
        ),
      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.up();

      expect(verticalDragAcceptedByParent, false);
      expect(
        controller.dispatchedPointerEvents.length,
        2,
      );
    });

    testWidgets('PlatformViewSurface rebuilt during gesture', (WidgetTester tester) async {
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: PlatformViewSurface(
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              controller: controller,
              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
              gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
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            ),
          ),
        ),
      );

      final TestGesture gesture = await tester.startGesture(const Offset(50.0, 50.0));
      await gesture.moveBy(const Offset(0.0, 100.0));

      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: PlatformViewSurface(
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              controller: controller,
              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
              gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
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            ),
          ),
        ),
      );

      await gesture.up();

      expect(
        controller.dispatchedPointerEvents.length,
        3,
      );
    });

    testWidgets('PlatformViewSurface with eager gesture recognizer', (WidgetTester tester) async {
      await tester.pumpWidget(
        Align(
          alignment: Alignment.topLeft,
          child: GestureDetector(
            onVerticalDragStart: (DragStartDetails d) { },
            child: SizedBox(
              width: 200.0,
              height: 100.0,
              child: PlatformViewSurface(
                controller: controller,
                hitTestBehavior: PlatformViewHitTestBehavior.opaque,
                gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
                  Factory<OneSequenceGestureRecognizer>(
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                    () => EagerGestureRecognizer(),
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                  ),
                },
              ),
            ),
          ),
        ),
      );

      await tester.startGesture(const Offset(50.0, 50.0));

      // Normally (without the eager gesture recognizer) after just the pointer down event
      // no gesture arena member will claim the arena (so no motion events will be dispatched to
      // the PlatformViewSurface). Here we assert that with the eager recognizer in the gesture team the
      // pointer down event is immediately dispatched.
      expect(
        controller.dispatchedPointerEvents.length,
        1,
      );
    });

    testWidgets('PlatformViewRenderBox reconstructed with same gestureRecognizers', (WidgetTester tester) async {
      int factoryInvocationCount = 0;
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      EagerGestureRecognizer constructRecognizer() {
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        ++factoryInvocationCount;
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        return EagerGestureRecognizer();
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      }
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      final PlatformViewSurface platformViewSurface = PlatformViewSurface(
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        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
        gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
          Factory<OneSequenceGestureRecognizer>(
            constructRecognizer,
          ),
        },
      );
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      await tester.pumpWidget(platformViewSurface);
      await tester.pumpWidget(const SizedBox.shrink());
      await tester.pumpWidget(platformViewSurface);

      expect(factoryInvocationCount, 2);
    });

    testWidgets('PlatformViewSurface rebuilt with same gestureRecognizers', (WidgetTester tester) async {
      int factoryInvocationCount = 0;
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      EagerGestureRecognizer constructRecognizer() {
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        ++factoryInvocationCount;
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        return EagerGestureRecognizer();
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      }
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      await tester.pumpWidget(
        PlatformViewSurface(
          controller: controller,
          hitTestBehavior: PlatformViewHitTestBehavior.opaque,
          gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
            Factory<OneSequenceGestureRecognizer>(
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              constructRecognizer,
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            ),
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          },
        ),
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      );

      await tester.pumpWidget(
        PlatformViewSurface(
          controller: controller,
          hitTestBehavior: PlatformViewHitTestBehavior.opaque,
          gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{
            Factory<OneSequenceGestureRecognizer>(
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              constructRecognizer,
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            ),
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          },
        ),
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      );
      expect(factoryInvocationCount, 1);
    });
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    testWidgets(
      'PlatformViewLink Widget init, should create a placeholder widget before onPlatformViewCreated and a PlatformViewSurface after',
      (WidgetTester tester) async {
        final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
        late int createdPlatformViewId;

        late PlatformViewCreatedCallback onPlatformViewCreatedCallBack;

        final PlatformViewLink platformViewLink = PlatformViewLink(
          viewType: 'webview',
          onCreatePlatformView: (PlatformViewCreationParams params) {
            onPlatformViewCreatedCallBack = params.onPlatformViewCreated;
            createdPlatformViewId = params.id;
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            return FakePlatformViewController(params.id)..create();
          },
          surfaceFactory: (BuildContext context, PlatformViewController controller) {
            return PlatformViewSurface(
              gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
              controller: controller,
              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
            );
          },
        );

        await tester.pumpWidget(platformViewLink);

        expect(
          tester.allWidgets.map((Widget widget) => widget.runtimeType.toString()).toList(),
          equals(<String>['PlatformViewLink', '_PlatformViewPlaceHolder']),
        );

        onPlatformViewCreatedCallBack(createdPlatformViewId);

        await tester.pump();

        expect(
          tester.allWidgets.map((Widget widget) => widget.runtimeType.toString()).toList(),
          equals(<String>['PlatformViewLink', 'Focus', '_FocusMarker', 'Semantics', 'PlatformViewSurface']),
        );

        expect(createdPlatformViewId, currentViewId + 1);
      },
    );

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    testWidgets(
      'PlatformViewLink widget should not trigger creation with an empty size',
      (WidgetTester tester) async {
        late PlatformViewController controller;

        final Widget widget = Center(child: SizedBox(
          height: 0,
          child: PlatformViewLink(
            viewType: 'webview',
            onCreatePlatformView: (PlatformViewCreationParams params) {
              controller = FakeAndroidViewController(params.id, requiresSize: true);
              controller.create();
              // This test should be simulating one of the texture-based display
              // modes, where `create` is a no-op when not provided a size, and
              // creation is triggered via a later call to setSize, or to `create`
              // with a size.
              expect(controller.awaitingCreation, true);
              return controller;
            },
            surfaceFactory: (BuildContext context, PlatformViewController controller) {
              return PlatformViewSurface(
                gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
                controller: controller,
                hitTestBehavior: PlatformViewHitTestBehavior.opaque,
              );
            },
          )
        ));

        await tester.pumpWidget(widget);

        expect(
          tester.allWidgets.map((Widget widget) => widget.runtimeType.toString()).toList(),
          equals(<String>['Center', 'SizedBox', 'PlatformViewLink', '_PlatformViewPlaceHolder']),
        );

        // 'create' should not have been called by PlatformViewLink, since its
        // size is empty.
        expect(controller.awaitingCreation, true);
      },
    );

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    testWidgets(
      'PlatformViewLink calls create when needed for Android texture display modes',
      (WidgetTester tester) async {
        final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
        late int createdPlatformViewId;

        late PlatformViewCreatedCallback onPlatformViewCreatedCallBack;
        late PlatformViewController controller;

        final PlatformViewLink platformViewLink = PlatformViewLink(
          viewType: 'webview',
          onCreatePlatformView: (PlatformViewCreationParams params) {
            onPlatformViewCreatedCallBack = params.onPlatformViewCreated;
            createdPlatformViewId = params.id;
            controller = FakeAndroidViewController(params.id, requiresSize: true);
            controller.create();
            // This test should be simulating one of the texture-based display
            // modes, where `create` is a no-op when not provided a size, and
            // creation is triggered via a later call to setSize, or to `create`
            // with a size.
            expect(controller.awaitingCreation, true);
            return controller;
          },
          surfaceFactory: (BuildContext context, PlatformViewController controller) {
            return PlatformViewSurface(
              gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
              controller: controller,
              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
            );
          },
        );

        await tester.pumpWidget(platformViewLink);

        expect(
          tester.allWidgets.map((Widget widget) => widget.runtimeType.toString()).toList(),
          equals(<String>['PlatformViewLink', '_PlatformViewPlaceHolder']),
        );

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        // Layout should have triggered a create call. Simulate the callback
        // that the real controller would make after creation.
        expect(controller.awaitingCreation, false);
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        onPlatformViewCreatedCallBack(createdPlatformViewId);

        await tester.pump();

        expect(
          tester.allWidgets.map((Widget widget) => widget.runtimeType.toString()).toList(),
          equals(<String>['PlatformViewLink', 'Focus', '_FocusMarker', 'Semantics', 'PlatformViewSurface']),
        );

        expect(createdPlatformViewId, currentViewId + 1);
      },
    );

    testWidgets(
      'PlatformViewLink does not double-call create for Android Hybrid Composition',
      (WidgetTester tester) async {
        final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
        late int createdPlatformViewId;

        late PlatformViewCreatedCallback onPlatformViewCreatedCallBack;
        late PlatformViewController controller;

        final PlatformViewLink platformViewLink = PlatformViewLink(
          viewType: 'webview',
          onCreatePlatformView: (PlatformViewCreationParams params) {
            onPlatformViewCreatedCallBack = params.onPlatformViewCreated;
            createdPlatformViewId = params.id;
            controller = FakeAndroidViewController(params.id);
            controller.create();
            // This test should be simulating Hybrid Composition mode, where
            // `create` takes effect immidately.
            expect(controller.awaitingCreation, false);
            return controller;
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          },
          surfaceFactory: (BuildContext context, PlatformViewController controller) {
            return PlatformViewSurface(
              gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
              controller: controller,
              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
            );
          },
        );

        await tester.pumpWidget(platformViewLink);

        expect(
          tester.allWidgets.map((Widget widget) => widget.runtimeType.toString()).toList(),
          equals(<String>['PlatformViewLink', '_PlatformViewPlaceHolder']),
        );

        onPlatformViewCreatedCallBack(createdPlatformViewId);

        await tester.pump();

        expect(
          tester.allWidgets.map((Widget widget) => widget.runtimeType.toString()).toList(),
          equals(<String>['PlatformViewLink', 'Focus', '_FocusMarker', 'Semantics', 'PlatformViewSurface']),
        );

        expect(createdPlatformViewId, currentViewId + 1);
      },
    );

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    testWidgets('PlatformViewLink Widget dispose', (WidgetTester tester) async {
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      late FakePlatformViewController disposedController;
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      final PlatformViewLink platformViewLink = PlatformViewLink(
        viewType: 'webview',
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        onCreatePlatformView: (PlatformViewCreationParams params) {
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          disposedController = FakePlatformViewController(params.id);
          params.onPlatformViewCreated(params.id);
          return disposedController;
        },
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        surfaceFactory: (BuildContext context, PlatformViewController controller) {
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          return PlatformViewSurface(
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            gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
            controller: controller,
            hitTestBehavior: PlatformViewHitTestBehavior.opaque,
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          );
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        },
      );
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      await tester.pumpWidget(platformViewLink);

      await tester.pumpWidget(Container());

      expect(disposedController.disposed, true);
    });

    testWidgets('PlatformViewLink widget survives widget tree change', (WidgetTester tester) async {
      final GlobalKey key = GlobalKey();
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final List<int> ids = <int>[];

      FakePlatformViewController controller;

      PlatformViewLink createPlatformViewLink() {
        return PlatformViewLink(
          key: key,
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          viewType: 'webview',
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          onCreatePlatformView: (PlatformViewCreationParams params) {
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            ids.add(params.id);
            controller = FakePlatformViewController(params.id);
            params.onPlatformViewCreated(params.id);
            return controller;
          },
          surfaceFactory: (BuildContext context, PlatformViewController controller) {
            return PlatformViewSurface(
              gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
              controller: controller,
              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
            );
          },
        );
      }
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      await tester.pumpWidget(
        Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: createPlatformViewLink(),
          ),
        ),
      );

      await tester.pumpWidget(
        Center(
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          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: createPlatformViewLink(),
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          ),
        ),
      );

      expect(
        ids,
        unorderedEquals(<int>[
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          currentViewId + 1,
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        ]),
      );
    });
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    testWidgets('PlatformViewLink re-initializes when view type changes', (WidgetTester tester) async {
      final int currentViewId = platformViewsRegistry.getNextPlatformViewId();
      final List<int> ids = <int>[];
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      final List<int> surfaceViewIds = <int>[];
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      final List<String> viewTypes = <String>[];

      PlatformViewLink createPlatformViewLink(String viewType) {
        return PlatformViewLink(
          viewType: viewType,
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          onCreatePlatformView: (PlatformViewCreationParams params) {
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            ids.add(params.id);
            viewTypes.add(params.viewType);
            controller = FakePlatformViewController(params.id);
            params.onPlatformViewCreated(params.id);
            return controller;
          },
          surfaceFactory: (BuildContext context, PlatformViewController controller) {
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            surfaceViewIds.add(controller.viewId);
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            return PlatformViewSurface(
              gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
              controller: controller,
              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
            );
          },
        );
      }
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      await tester.pumpWidget(
        Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: createPlatformViewLink('webview'),
          ),
        ),
      );

      await tester.pumpWidget(
        Center(
          child: SizedBox(
            width: 200.0,
            height: 100.0,
            child: createPlatformViewLink('maps'),
          ),
        ),
      );

      expect(
        ids,
        unorderedEquals(<int>[
2782 2783
          currentViewId + 1,
          currentViewId + 2,
2784 2785 2786
        ]),
      );

2787 2788 2789
      expect(
        surfaceViewIds,
        unorderedEquals(<int>[
2790 2791
          currentViewId + 1,
          currentViewId + 2,
2792 2793 2794
        ]),
      );

2795 2796 2797
      expect(
        viewTypes,
        unorderedEquals(<String>[
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          'webview',
          'maps',
2800 2801 2802 2803
        ]),
      );
    });

2804
    testWidgets('PlatformViewLink can take any widget to return in the SurfaceFactory', (WidgetTester tester) async {
2805 2806
      final PlatformViewLink platformViewLink = PlatformViewLink(
        viewType: 'webview',
2807
        onCreatePlatformView: (PlatformViewCreationParams params) {
2808 2809 2810
          params.onPlatformViewCreated(params.id);
          return FakePlatformViewController(params.id);
        },
2811
        surfaceFactory: (BuildContext context, PlatformViewController controller) {
2812
          return Container();
2813 2814
        },
      );
2815 2816 2817

      await tester.pumpWidget(platformViewLink);

2818
      expect(() => tester.allWidgets.whereType<Container>().first, returnsNormally);
2819
    });
2820 2821 2822

    testWidgets('PlatformViewLink manages the focus properly', (WidgetTester tester) async {
      final GlobalKey containerKey = GlobalKey();
2823 2824
      late FakePlatformViewController controller;
      late ValueChanged<bool> focusChanged;
2825
      final PlatformViewLink platformViewLink = PlatformViewLink(
2826
        viewType: 'webview',
2827
        onCreatePlatformView: (PlatformViewCreationParams params) {
2828 2829 2830 2831 2832 2833 2834 2835 2836 2837
          params.onPlatformViewCreated(params.id);
          focusChanged = params.onFocusChanged;
          controller = FakePlatformViewController(params.id);
          return controller;
        },
        surfaceFactory: (BuildContext context, PlatformViewController controller) {
          return PlatformViewSurface(
            gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
            controller: controller,
            hitTestBehavior: PlatformViewHitTestBehavior.opaque,
2838 2839 2840
          );
        },
      );
2841 2842 2843 2844
      await tester.pumpWidget(
        Center(
          child: Column(
            children: <Widget>[
2845
              SizedBox(width: 300, height: 300, child: platformViewLink),
2846 2847 2848 2849 2850 2851 2852 2853
              Focus(
                debugLabel: 'container',
                child: Container(key: containerKey),
              ),
            ],
          ),
        ),
      );
2854 2855 2856 2857 2858
      final Focus platformViewFocusWidget = tester.widget(
        find.descendant(
          of: find.byType(PlatformViewLink),
          matching: find.byType(Focus),
        ),
2859
      );
2860
      final FocusNode platformViewFocusNode = platformViewFocusWidget.focusNode!;
2861
      final Element containerElement = tester.element(find.byKey(containerKey));
2862
      final FocusNode containerFocusNode = Focus.of(containerElement);
2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884

      containerFocusNode.requestFocus();
      await tester.pump();

      expect(containerFocusNode.hasFocus, true);
      expect(platformViewFocusNode.hasFocus, false);

      // ask the platform view to gain focus
      focusChanged(true);
      await tester.pump();

      expect(containerFocusNode.hasFocus, false);
      expect(platformViewFocusNode.hasFocus, true);
      expect(controller.focusCleared, false);
      // ask the container to gain focus, and the platform view should clear focus.
      containerFocusNode.requestFocus();
      await tester.pump();

      expect(containerFocusNode.hasFocus, true);
      expect(platformViewFocusNode.hasFocus, false);
      expect(controller.focusCleared, true);
    });
2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933

    testWidgets('PlatformViewLink sets a platform view text input client when focused', (WidgetTester tester) async {
      late FakePlatformViewController controller;
      late int viewId;

      final PlatformViewLink platformViewLink = PlatformViewLink(
        viewType: 'test',
        onCreatePlatformView: (PlatformViewCreationParams params) {
          viewId = params.id;
          params.onPlatformViewCreated(params.id);
          controller = FakePlatformViewController(params.id);
          return controller;
        },
        surfaceFactory: (BuildContext context, PlatformViewController controller) {
          return PlatformViewSurface(
            gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
            controller: controller,
            hitTestBehavior: PlatformViewHitTestBehavior.opaque,
          );
        },
      );
      await tester.pumpWidget(SizedBox(width: 300, height: 300, child: platformViewLink));

      final Focus platformViewFocusWidget = tester.widget(
        find.descendant(
          of: find.byType(PlatformViewLink),
          matching: find.byType(Focus),
        ),
      );

      final FocusNode? focusNode = platformViewFocusWidget.focusNode;
      expect(focusNode, isNotNull);
      expect(focusNode!.hasFocus, false);

      late Map<String, dynamic> lastPlatformViewTextClient;
      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.textInput, (MethodCall call) {
        if (call.method == 'TextInput.setPlatformViewClient') {
          lastPlatformViewTextClient = call.arguments as Map<String, dynamic>;
        }
        return null;
      });

      platformViewFocusWidget.focusNode!.requestFocus();
      await tester.pump();

      expect(focusNode.hasFocus, true);
      expect(lastPlatformViewTextClient.containsKey('platformViewId'), true);
      expect(lastPlatformViewTextClient['platformViewId'], viewId);
    });
2934
  });
2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984

  testWidgets('Platform views respect hitTestBehavior', (WidgetTester tester) async {
    final FakePlatformViewController controller = FakePlatformViewController(0);

    final List<String> logs = <String>[];

    // -------------------------
    // | MouseRegion1          |       MouseRegion1
    // |  |-----------------|  |        |
    // |  | MouseRegion2    |  |        |- Stack
    // |  |   |---------|   |  |            |
    // |  |   |Platform |   |  |            |- MouseRegion2
    // |  |   |View     |   |  |            |- PlatformView
    // |  |   |---------|   |  |
    // |  |                 |  |
    // |  |-----------------|  |
    // |                       |
    // -------------------------
    Widget scaffold(Widget target) {
      return Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: SizedBox(
            width: 600,
            height: 600,
            child: MouseRegion(
              onEnter: (_) { logs.add('enter1'); },
              onExit: (_) { logs.add('exit1'); },
              cursor: SystemMouseCursors.forbidden,
              child: Stack(
                children: <Widget>[
                  Center(
                    child: SizedBox(
                      width: 400,
                      height: 400,
                      child: MouseRegion(
                        onEnter: (_) { logs.add('enter2'); },
                        onExit: (_) { logs.add('exit2'); },
                        cursor: SystemMouseCursors.text,
                      ),
                    ),
                  ),
                  Center(
                    child: SizedBox(
                      width: 200,
                      height: 200,
                      child: target,
                    ),
                  ),
                ],
2985
              ),
2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998
            ),
          ),
        ),
      );
    }

    final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse, pointer: 0);

    // Test: Opaque
    await tester.pumpWidget(
      scaffold(PlatformViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
2999 3000
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      )),
3001 3002 3003 3004 3005 3006
    );
    logs.clear();

    await gesture.moveTo(const Offset(400, 300));
    expect(logs, <String>['enter1']);
    expect(controller.dispatchedPointerEvents, hasLength(1));
3007
    expect(controller.dispatchedPointerEvents[0], isA<PointerHoverEvent>());
3008 3009 3010 3011 3012 3013 3014 3015
    logs.clear();
    controller.dispatchedPointerEvents.clear();

    // Test: changing no option does not trigger events
    await tester.pumpWidget(
      scaffold(PlatformViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
3016 3017
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      )),
3018 3019 3020 3021
    );
    expect(logs, isEmpty);
    expect(controller.dispatchedPointerEvents, isEmpty);

3022
    // Test: Translucent
3023 3024 3025 3026
    await tester.pumpWidget(
      scaffold(PlatformViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.translucent,
3027 3028
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      )),
3029 3030 3031 3032 3033 3034 3035 3036
    );
    expect(logs, <String>['enter2']);
    expect(controller.dispatchedPointerEvents, isEmpty);
    logs.clear();

    await gesture.moveBy(const Offset(1, 1));
    expect(logs, isEmpty);
    expect(controller.dispatchedPointerEvents, hasLength(1));
3037
    expect(controller.dispatchedPointerEvents[0], isA<PointerHoverEvent>());
3038 3039 3040 3041 3042 3043 3044 3045 3046
    expect(controller.dispatchedPointerEvents[0].position, const Offset(401, 301));
    expect(controller.dispatchedPointerEvents[0].localPosition, const Offset(101, 101));
    controller.dispatchedPointerEvents.clear();

    // Test: Transparent
    await tester.pumpWidget(
      scaffold(PlatformViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.transparent,
3047 3048
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      )),
3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061
    );
    expect(logs, isEmpty);
    expect(controller.dispatchedPointerEvents, isEmpty);

    await gesture.moveBy(const Offset(1, 1));
    expect(logs, isEmpty);
    expect(controller.dispatchedPointerEvents, isEmpty);

    // Test: Back to opaque
    await tester.pumpWidget(
      scaffold(PlatformViewSurface(
        controller: controller,
        hitTestBehavior: PlatformViewHitTestBehavior.opaque,
3062 3063
        gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
      )),
3064 3065 3066 3067 3068 3069 3070 3071
    );
    expect(logs, <String>['exit2']);
    expect(controller.dispatchedPointerEvents, isEmpty);
    logs.clear();

    await gesture.moveBy(const Offset(1, 1));
    expect(logs, isEmpty);
    expect(controller.dispatchedPointerEvents, hasLength(1));
3072
    expect(controller.dispatchedPointerEvents[0], isA<PointerHoverEvent>());
3073
  });
3074
}