packages/flutter/test/material/selection_area_test.dart - mirrors/flutter - Git at Google

 // Copyright 2014 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';

 import '../widgets/process_text_utils.dart';

 Offset textOffsetToPosition(RenderParagraph paragraph, int offset) {
   const Rect caret = Rect.fromLTWH(0.0, 0.0, 2.0, 20.0);
   final Offset localOffset = paragraph.getOffsetForCaret(TextPosition(offset: offset), caret);
   return paragraph.localToGlobal(localOffset);
 }

 void main() {
   testWidgets('SelectionArea uses correct selection controls', (WidgetTester tester) async {
     await tester.pumpWidget(const MaterialApp(
       home: SelectionArea(
         child: Text('abc'),
       ),
     ));
     final SelectableRegion region = tester.widget<SelectableRegion>(find.byType(SelectableRegion));

     switch (defaultTargetPlatform) {
       case TargetPlatform.android:
       case TargetPlatform.fuchsia:
         expect(region.selectionControls, materialTextSelectionHandleControls);
       case TargetPlatform.iOS:
         expect(region.selectionControls, cupertinoTextSelectionHandleControls);
       case TargetPlatform.linux:
       case TargetPlatform.windows:
         expect(region.selectionControls, desktopTextSelectionHandleControls);
       case TargetPlatform.macOS:
         expect(region.selectionControls, cupertinoDesktopTextSelectionHandleControls);
     }
   }, variant: TargetPlatformVariant.all());

   testWidgets('Does not crash when long pressing on padding after dragging', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/123378
     await tester.pumpWidget(
       const MaterialApp(
         color: Color(0xFF2196F3),
         title: 'Demo',
         home: Scaffold(
           body: SelectionArea(
             child: Padding(
               padding: EdgeInsets.all(100.0),
               child: Text('Hello World'),
             ),
           ),
         ),
       ),
     );
     final TestGesture dragging = await tester.startGesture(const Offset(10, 10));
     addTearDown(dragging.removePointer);
     await tester.pump(const Duration(milliseconds: 500));
     await dragging.moveTo(const Offset(90, 90));
     await dragging.up();

     final TestGesture longpress = await tester.startGesture(const Offset(20,20));
     addTearDown(longpress.removePointer);
     await tester.pump(const Duration(milliseconds: 500));
     await longpress.up();

     expect(tester.takeException(), isNull);
   });

   // Regression test for https://github.com/flutter/flutter/issues/111370
   testWidgets('Handle is correctly transformed when the text is inside of a FittedBox ',(WidgetTester tester) async {
       final Key textKey = UniqueKey();
       await tester.pumpWidget(
         MaterialApp(
           color: const Color(0xFF2196F3),
           home: Scaffold(
             body: SelectionArea(
               child: SizedBox(
                 height: 100,
                 child: FittedBox(
                   fit: BoxFit.fill,
                   child: Text('test', key: textKey),
                 ),
               ),
             ),
           ),
         ),
       );

       final TestGesture longpress = await tester.startGesture(tester.getCenter(find.byType(Text)));
       addTearDown(longpress.removePointer);
       await tester.pump(const Duration(milliseconds: 500));
       await longpress.up();

       // Text box is scaled by 5.
       final RenderBox textBox = tester.firstRenderObject(find.byKey(textKey));
       expect(textBox.size.height, 20.0);
       final Offset textPoint = textBox.localToGlobal(const Offset(0, 20));
       expect(textPoint, equals(const Offset(0, 100)));

       // Find handles and verify their sizes.
       expect(find.byType(Overlay), findsOneWidget);
       expect(find.descendant(of: find.byType(Overlay),matching: find.byType(CustomPaint),),findsNWidgets(2));
       final Iterable<RenderBox> handles = tester.renderObjectList(find.descendant(
         of: find.byType(Overlay),
         matching: find.byType(CustomPaint),
       ));

       // The handle height is determined by the formula:
       // textLineHeight + _kSelectionHandleRadius * 2 - _kSelectionHandleOverlap .
       // The text line height will be the value of the fontSize.
       // The constant _kSelectionHandleRadius has the value of 6.
       // The constant _kSelectionHandleOverlap has the value of 1.5.
       // The handle height before scaling is 20.0 + 6 * 2 - 1.5 = 30.5.

       final double handleHeightBeforeScaling = handles.first.size.height;
       expect(handleHeightBeforeScaling, 30.5);

       final Offset handleHeightAfterScaling = handles.first.localToGlobal(const Offset(0, 30.5)) - handles.first.localToGlobal(Offset.zero);

       // The handle height after scaling is  30.5 * 5 = 152.5
       expect(handleHeightAfterScaling, equals(const Offset(0.0, 152.5)));
     },
     skip: isBrowser, // [intended]
     variant: const TargetPlatformVariant(<TargetPlatform>{TargetPlatform.iOS}),
   );

   testWidgets('builds the default context menu by default', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
     addTearDown(focusNode.dispose);

     await tester.pumpWidget(
       MaterialApp(
         home: SelectionArea(
           focusNode: focusNode,
           child: const Text('How are you?'),
         ),
       ),
     );
     await tester.pumpAndSettle();

     expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);

     // Show the toolbar by longpressing.
     final RenderParagraph paragraph1 = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('How are you?'), matching: find.byType(RichText)));
     final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph1, 6)); // at the 'r'
     addTearDown(gesture.removePointer);
     await tester.pump(const Duration(milliseconds: 500));
     // `are` is selected.
     expect(paragraph1.selections[0], const TextSelection(baseOffset: 4, extentOffset: 7));

     await gesture.up();
     await tester.pumpAndSettle();

     expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);
   },
     skip: kIsWeb, // [intended]
   );

   testWidgets('builds a custom context menu if provided', (WidgetTester tester) async {
     final GlobalKey key = GlobalKey();
     final FocusNode focusNode = FocusNode();
     addTearDown(focusNode.dispose);

     await tester.pumpWidget(
       MaterialApp(
         home: SelectionArea(
           focusNode: focusNode,
           contextMenuBuilder: (
             BuildContext context,
             SelectableRegionState selectableRegionState,
           ) {
             return Placeholder(key: key);
           },
           child: const Text('How are you?'),
         ),
       ),
     );
     await tester.pumpAndSettle();

     expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
     expect(find.byKey(key), findsNothing);

     // Show the toolbar by longpressing.
     final RenderParagraph paragraph1 = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('How are you?'), matching: find.byType(RichText)));
     final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph1, 6)); // at the 'r'
     addTearDown(gesture.removePointer);
     await tester.pump(const Duration(milliseconds: 500));
     // `are` is selected.
     expect(paragraph1.selections[0], const TextSelection(baseOffset: 4, extentOffset: 7));

     await gesture.up();
     await tester.pumpAndSettle();

     expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
     expect(find.byKey(key), findsOneWidget);
   },
     skip: kIsWeb, // [intended]
   );

   testWidgets('Text processing actions are added to the toolbar', (WidgetTester tester) async {
     final MockProcessTextHandler mockProcessTextHandler = MockProcessTextHandler();
     TestWidgetsFlutterBinding.ensureInitialized().defaultBinaryMessenger
         .setMockMethodCallHandler(SystemChannels.processText, mockProcessTextHandler.handleMethodCall);
     addTearDown(() => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.processText, null));

     final FocusNode focusNode = FocusNode();
     addTearDown(focusNode.dispose);

     await tester.pumpWidget(
       MaterialApp(
         home: SelectionArea(
           focusNode: focusNode,
           child: const Text('How are you?'),
         ),
       ),
     );
     await tester.pumpAndSettle();

     expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);

     final RenderParagraph paragraph = tester.renderObject<RenderParagraph>(
       find.descendant(
         of: find.text('How are you?'),
         matching: find.byType(RichText),
       ),
     );
     final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph, 6)); // at the 'r'
     addTearDown(gesture.removePointer);
     await tester.pump(const Duration(milliseconds: 500));
     // `are` is selected.
     expect(paragraph.selections[0], const TextSelection(baseOffset: 4, extentOffset: 7));

     await gesture.up();
     await tester.pumpAndSettle();

     // The toolbar is visible.
     expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);

     // The text processing actions are visible on Android only.
     final bool areTextActionsSupported = defaultTargetPlatform == TargetPlatform.android;
     expect(find.text(fakeAction1Label), areTextActionsSupported ? findsOneWidget : findsNothing);
     expect(find.text(fakeAction2Label), areTextActionsSupported ? findsOneWidget : findsNothing);
   },
     variant: TargetPlatformVariant.all(),
     skip: kIsWeb, // [intended]
   );

   testWidgets('onSelectionChange is called when the selection changes', (WidgetTester tester) async {
     SelectedContent? content;

     await tester.pumpWidget(MaterialApp(
       home: SelectionArea(
         child: const Text('How are you'),
         onSelectionChanged: (SelectedContent? selectedContent) => content = selectedContent,
       ),
     ));
     final RenderParagraph paragraph = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('How are you'), matching: find.byType(RichText)));
     final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph, 4), kind: PointerDeviceKind.mouse);
     expect(content, isNull);
     addTearDown(gesture.removePointer);
     await tester.pump();

     await gesture.moveTo(textOffsetToPosition(paragraph, 7));
     await gesture.up();
     await tester.pump();
     expect(content, isNotNull);
     expect(content!.plainText, 'are');

     // Backwards selection.
     await gesture.down(textOffsetToPosition(paragraph, 3));
     await tester.pump();
     await gesture.up();
     await tester.pumpAndSettle(kDoubleTapTimeout);
     expect(content, isNotNull);
     expect(content!.plainText, '');

     await gesture.down(textOffsetToPosition(paragraph, 3));
     await tester.pump();
     await gesture.moveTo(textOffsetToPosition(paragraph, 0));
     await gesture.up();
     await tester.pump();
     expect(content, isNotNull);
     expect(content!.plainText, 'How');
   });

   testWidgets('stopping drag of end handle will show the toolbar', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
     addTearDown(focusNode.dispose);

     // Regression test for https://github.com/flutter/flutter/issues/119314
     await tester.pumpWidget(
       MaterialApp(
         theme: ThemeData(useMaterial3: false),
         home: Scaffold(
           body: Padding(
             padding: const EdgeInsets.only(top: 64),
             child: Column(
               children: <Widget>[
                 const Text('How are you?'),
                 SelectionArea(
                   focusNode: focusNode,
                   child: const Text('Good, and you?'),
                 ),
                 const Text('Fine, thank you.'),
               ],
             ),
           ),
         ),
       ),
     );
     await tester.pumpAndSettle();
     final RenderParagraph paragraph2 = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('Good, and you?'), matching: find.byType(RichText)));
     final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph2, 7)); // at the 'a'
     addTearDown(gesture.removePointer);
     await tester.pump(const Duration(milliseconds: 500));
     await gesture.up();
     final List<TextBox> boxes = paragraph2.getBoxesForSelection(paragraph2.selections[0]);
     expect(boxes.length, 1);
     await tester.pumpAndSettle();
     // There is a selection now.
     // We check the presence of the copy button to make sure the selection toolbar
     // is showing.
     expect(find.text('Copy'), findsOneWidget);

     // This is the position of the selection handle displayed at the end.
     final Offset handlePos = paragraph2.localToGlobal(boxes[0].toRect().bottomRight);
     await gesture.down(handlePos);
     await gesture.moveTo(textOffsetToPosition(paragraph2, 11) + Offset(0, paragraph2.size.height / 2));
     await tester.pump();

     await gesture.up();
     await tester.pump();

     // After lifting the finger up, the selection toolbar should be showing again.
     expect(find.text('Copy'), findsOneWidget);
   },
     variant: TargetPlatformVariant.all(),
     skip: kIsWeb, // [intended]
   );
 }
	// Copyright 2014 The Flutter Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	import 'package:flutter/cupertino.dart';
	import 'package:flutter/foundation.dart';
	import 'package:flutter/gestures.dart';
	import 'package:flutter/material.dart';
	import 'package:flutter/rendering.dart';
	import 'package:flutter/services.dart';
	import 'package:flutter_test/flutter_test.dart';

	import '../widgets/process_text_utils.dart';

	Offset textOffsetToPosition(RenderParagraph paragraph, int offset) {
	const Rect caret = Rect.fromLTWH(0.0, 0.0, 2.0, 20.0);
	final Offset localOffset = paragraph.getOffsetForCaret(TextPosition(offset: offset), caret);
	return paragraph.localToGlobal(localOffset);
	}

	void main() {
	testWidgets('SelectionArea uses correct selection controls', (WidgetTester tester) async {
	await tester.pumpWidget(const MaterialApp(
	home: SelectionArea(
	child: Text('abc'),
	),
	));
	final SelectableRegion region = tester.widget<SelectableRegion>(find.byType(SelectableRegion));

	switch (defaultTargetPlatform) {
	case TargetPlatform.android:
	case TargetPlatform.fuchsia:
	expect(region.selectionControls, materialTextSelectionHandleControls);
	case TargetPlatform.iOS:
	expect(region.selectionControls, cupertinoTextSelectionHandleControls);
	case TargetPlatform.linux:
	case TargetPlatform.windows:
	expect(region.selectionControls, desktopTextSelectionHandleControls);
	case TargetPlatform.macOS:
	expect(region.selectionControls, cupertinoDesktopTextSelectionHandleControls);
	}
	}, variant: TargetPlatformVariant.all());

	testWidgets('Does not crash when long pressing on padding after dragging', (WidgetTester tester) async {
	// Regression test for https://github.com/flutter/flutter/issues/123378
	await tester.pumpWidget(
	const MaterialApp(
	color: Color(0xFF2196F3),
	title: 'Demo',
	home: Scaffold(
	body: SelectionArea(
	child: Padding(
	padding: EdgeInsets.all(100.0),
	child: Text('Hello World'),
	),
	),
	),
	),
	);
	final TestGesture dragging = await tester.startGesture(const Offset(10, 10));
	addTearDown(dragging.removePointer);
	await tester.pump(const Duration(milliseconds: 500));
	await dragging.moveTo(const Offset(90, 90));
	await dragging.up();

	final TestGesture longpress = await tester.startGesture(const Offset(20,20));
	addTearDown(longpress.removePointer);
	await tester.pump(const Duration(milliseconds: 500));
	await longpress.up();

	expect(tester.takeException(), isNull);
	});

	// Regression test for https://github.com/flutter/flutter/issues/111370
	testWidgets('Handle is correctly transformed when the text is inside of a FittedBox ',(WidgetTester tester) async {
	final Key textKey = UniqueKey();
	await tester.pumpWidget(
	MaterialApp(
	color: const Color(0xFF2196F3),
	home: Scaffold(
	body: SelectionArea(
	child: SizedBox(
	height: 100,
	child: FittedBox(
	fit: BoxFit.fill,
	child: Text('test', key: textKey),
	),
	),
	),
	),
	),
	);

	final TestGesture longpress = await tester.startGesture(tester.getCenter(find.byType(Text)));
	addTearDown(longpress.removePointer);
	await tester.pump(const Duration(milliseconds: 500));
	await longpress.up();

	// Text box is scaled by 5.
	final RenderBox textBox = tester.firstRenderObject(find.byKey(textKey));
	expect(textBox.size.height, 20.0);
	final Offset textPoint = textBox.localToGlobal(const Offset(0, 20));
	expect(textPoint, equals(const Offset(0, 100)));

	// Find handles and verify their sizes.
	expect(find.byType(Overlay), findsOneWidget);
	expect(find.descendant(of: find.byType(Overlay),matching: find.byType(CustomPaint),),findsNWidgets(2));
	final Iterable<RenderBox> handles = tester.renderObjectList(find.descendant(
	of: find.byType(Overlay),
	matching: find.byType(CustomPaint),
	));

	// The handle height is determined by the formula:
	// textLineHeight + _kSelectionHandleRadius * 2 - _kSelectionHandleOverlap .
	// The text line height will be the value of the fontSize.
	// The constant _kSelectionHandleRadius has the value of 6.
	// The constant _kSelectionHandleOverlap has the value of 1.5.
	// The handle height before scaling is 20.0 + 6 * 2 - 1.5 = 30.5.

	final double handleHeightBeforeScaling = handles.first.size.height;
	expect(handleHeightBeforeScaling, 30.5);

	final Offset handleHeightAfterScaling = handles.first.localToGlobal(const Offset(0, 30.5)) - handles.first.localToGlobal(Offset.zero);

	// The handle height after scaling is 30.5 * 5 = 152.5
	expect(handleHeightAfterScaling, equals(const Offset(0.0, 152.5)));
	},
	skip: isBrowser, // [intended]
	variant: const TargetPlatformVariant(<TargetPlatform>{TargetPlatform.iOS}),
	);

	testWidgets('builds the default context menu by default', (WidgetTester tester) async {
	final FocusNode focusNode = FocusNode();
	addTearDown(focusNode.dispose);

	await tester.pumpWidget(
	MaterialApp(
	home: SelectionArea(
	focusNode: focusNode,
	child: const Text('How are you?'),
	),
	),
	);
	await tester.pumpAndSettle();

	expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);

	// Show the toolbar by longpressing.
	final RenderParagraph paragraph1 = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('How are you?'), matching: find.byType(RichText)));
	final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph1, 6)); // at the 'r'
	addTearDown(gesture.removePointer);
	await tester.pump(const Duration(milliseconds: 500));
	// `are` is selected.
	expect(paragraph1.selections[0], const TextSelection(baseOffset: 4, extentOffset: 7));

	await gesture.up();
	await tester.pumpAndSettle();

	expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);
	},
	skip: kIsWeb, // [intended]
	);

	testWidgets('builds a custom context menu if provided', (WidgetTester tester) async {
	final GlobalKey key = GlobalKey();
	final FocusNode focusNode = FocusNode();
	addTearDown(focusNode.dispose);

	await tester.pumpWidget(
	MaterialApp(
	home: SelectionArea(
	focusNode: focusNode,
	contextMenuBuilder: (
	BuildContext context,
	SelectableRegionState selectableRegionState,
	) {
	return Placeholder(key: key);
	},
	child: const Text('How are you?'),
	),
	),
	);
	await tester.pumpAndSettle();

	expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
	expect(find.byKey(key), findsNothing);

	// Show the toolbar by longpressing.
	final RenderParagraph paragraph1 = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('How are you?'), matching: find.byType(RichText)));
	final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph1, 6)); // at the 'r'
	addTearDown(gesture.removePointer);
	await tester.pump(const Duration(milliseconds: 500));
	// `are` is selected.
	expect(paragraph1.selections[0], const TextSelection(baseOffset: 4, extentOffset: 7));

	await gesture.up();
	await tester.pumpAndSettle();

	expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);
	expect(find.byKey(key), findsOneWidget);
	},
	skip: kIsWeb, // [intended]
	);

	testWidgets('Text processing actions are added to the toolbar', (WidgetTester tester) async {
	final MockProcessTextHandler mockProcessTextHandler = MockProcessTextHandler();
	TestWidgetsFlutterBinding.ensureInitialized().defaultBinaryMessenger
	.setMockMethodCallHandler(SystemChannels.processText, mockProcessTextHandler.handleMethodCall);
	addTearDown(() => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.processText, null));

	final FocusNode focusNode = FocusNode();
	addTearDown(focusNode.dispose);

	await tester.pumpWidget(
	MaterialApp(
	home: SelectionArea(
	focusNode: focusNode,
	child: const Text('How are you?'),
	),
	),
	);
	await tester.pumpAndSettle();

	expect(find.byType(AdaptiveTextSelectionToolbar), findsNothing);

	final RenderParagraph paragraph = tester.renderObject<RenderParagraph>(
	find.descendant(
	of: find.text('How are you?'),
	matching: find.byType(RichText),
	),
	);
	final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph, 6)); // at the 'r'
	addTearDown(gesture.removePointer);
	await tester.pump(const Duration(milliseconds: 500));
	// `are` is selected.
	expect(paragraph.selections[0], const TextSelection(baseOffset: 4, extentOffset: 7));

	await gesture.up();
	await tester.pumpAndSettle();

	// The toolbar is visible.
	expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);

	// The text processing actions are visible on Android only.
	final bool areTextActionsSupported = defaultTargetPlatform == TargetPlatform.android;
	expect(find.text(fakeAction1Label), areTextActionsSupported ? findsOneWidget : findsNothing);
	expect(find.text(fakeAction2Label), areTextActionsSupported ? findsOneWidget : findsNothing);
	},
	variant: TargetPlatformVariant.all(),
	skip: kIsWeb, // [intended]
	);

	testWidgets('onSelectionChange is called when the selection changes', (WidgetTester tester) async {
	SelectedContent? content;

	await tester.pumpWidget(MaterialApp(
	home: SelectionArea(
	child: const Text('How are you'),
	onSelectionChanged: (SelectedContent? selectedContent) => content = selectedContent,
	),
	));
	final RenderParagraph paragraph = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('How are you'), matching: find.byType(RichText)));
	final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph, 4), kind: PointerDeviceKind.mouse);
	expect(content, isNull);
	addTearDown(gesture.removePointer);
	await tester.pump();

	await gesture.moveTo(textOffsetToPosition(paragraph, 7));
	await gesture.up();
	await tester.pump();
	expect(content, isNotNull);
	expect(content!.plainText, 'are');

	// Backwards selection.
	await gesture.down(textOffsetToPosition(paragraph, 3));
	await tester.pump();
	await gesture.up();
	await tester.pumpAndSettle(kDoubleTapTimeout);
	expect(content, isNotNull);
	expect(content!.plainText, '');

	await gesture.down(textOffsetToPosition(paragraph, 3));
	await tester.pump();
	await gesture.moveTo(textOffsetToPosition(paragraph, 0));
	await gesture.up();
	await tester.pump();
	expect(content, isNotNull);
	expect(content!.plainText, 'How');
	});

	testWidgets('stopping drag of end handle will show the toolbar', (WidgetTester tester) async {
	final FocusNode focusNode = FocusNode();
	addTearDown(focusNode.dispose);

	// Regression test for https://github.com/flutter/flutter/issues/119314
	await tester.pumpWidget(
	MaterialApp(
	theme: ThemeData(useMaterial3: false),
	home: Scaffold(
	body: Padding(
	padding: const EdgeInsets.only(top: 64),
	child: Column(
	children: <Widget>[
	const Text('How are you?'),
	SelectionArea(
	focusNode: focusNode,
	child: const Text('Good, and you?'),
	),
	const Text('Fine, thank you.'),
	],
	),
	),
	),
	),
	);
	await tester.pumpAndSettle();
	final RenderParagraph paragraph2 = tester.renderObject<RenderParagraph>(find.descendant(of: find.text('Good, and you?'), matching: find.byType(RichText)));
	final TestGesture gesture = await tester.startGesture(textOffsetToPosition(paragraph2, 7)); // at the 'a'
	addTearDown(gesture.removePointer);
	await tester.pump(const Duration(milliseconds: 500));
	await gesture.up();
	final List<TextBox> boxes = paragraph2.getBoxesForSelection(paragraph2.selections[0]);
	expect(boxes.length, 1);
	await tester.pumpAndSettle();
	// There is a selection now.
	// We check the presence of the copy button to make sure the selection toolbar
	// is showing.
	expect(find.text('Copy'), findsOneWidget);

	// This is the position of the selection handle displayed at the end.
	final Offset handlePos = paragraph2.localToGlobal(boxes[0].toRect().bottomRight);
	await gesture.down(handlePos);
	await gesture.moveTo(textOffsetToPosition(paragraph2, 11) + Offset(0, paragraph2.size.height / 2));
	await tester.pump();

	await gesture.up();
	await tester.pump();

	// After lifting the finger up, the selection toolbar should be showing again.
	expect(find.text('Copy'), findsOneWidget);
	},
	variant: TargetPlatformVariant.all(),
	skip: kIsWeb, // [intended]
	);
	}