packages/flutter/test/material/bottom_navigation_bar_theme_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/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:vector_math/vector_math_64.dart' show Vector3;


 void main() {
   test('BottomNavigationBarThemeData copyWith, ==, hashCode basics', () {
     expect(const BottomNavigationBarThemeData(), const BottomNavigationBarThemeData().copyWith());
     expect(const BottomNavigationBarThemeData().hashCode, const BottomNavigationBarThemeData().copyWith().hashCode);
   });

   test('BottomNavigationBarThemeData defaults', () {
     const BottomNavigationBarThemeData themeData = BottomNavigationBarThemeData();
     expect(themeData.backgroundColor, null);
     expect(themeData.elevation, null);
     expect(themeData.selectedIconTheme, null);
     expect(themeData.unselectedIconTheme, null);
     expect(themeData.selectedItemColor, null);
     expect(themeData.unselectedItemColor, null);
     expect(themeData.selectedLabelStyle, null);
     expect(themeData.unselectedLabelStyle, null);
     expect(themeData.showSelectedLabels, null);
     expect(themeData.showUnselectedLabels, null);
     expect(themeData.type, null);
     expect(themeData.landscapeLayout, null);
     expect(themeData.mouseCursor, null);

     const BottomNavigationBarTheme theme = BottomNavigationBarTheme(data: BottomNavigationBarThemeData(), child: SizedBox());
     expect(theme.data.backgroundColor, null);
     expect(theme.data.elevation, null);
     expect(theme.data.selectedIconTheme, null);
     expect(theme.data.unselectedIconTheme, null);
     expect(theme.data.selectedItemColor, null);
     expect(theme.data.unselectedItemColor, null);
     expect(theme.data.selectedLabelStyle, null);
     expect(theme.data.unselectedLabelStyle, null);
     expect(theme.data.showSelectedLabels, null);
     expect(theme.data.showUnselectedLabels, null);
     expect(theme.data.type, null);
     expect(themeData.landscapeLayout, null);
     expect(themeData.mouseCursor, null);
   });

   testWidgets('Default BottomNavigationBarThemeData debugFillProperties', (WidgetTester tester) async {
     final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
     const BottomNavigationBarThemeData().debugFillProperties(builder);

     final List<String> description = builder.properties
         .where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
         .map((DiagnosticsNode node) => node.toString())
         .toList();

     expect(description, <String>[]);
   });

   testWidgets('BottomNavigationBarThemeData implements debugFillProperties', (WidgetTester tester) async {
     final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
     const BottomNavigationBarThemeData(
       backgroundColor: Color(0xfffffff0),
       elevation: 10.0,
       selectedIconTheme: IconThemeData(size: 1.0),
       unselectedIconTheme: IconThemeData(size: 2.0),
       selectedItemColor: Color(0xfffffff1),
       unselectedItemColor: Color(0xfffffff2),
       selectedLabelStyle: TextStyle(fontSize: 3.0),
       unselectedLabelStyle: TextStyle(fontSize: 4.0),
       showSelectedLabels: true,
       showUnselectedLabels: true,
       type: BottomNavigationBarType.fixed,
       mouseCursor: MaterialStateMouseCursor.clickable,
     ).debugFillProperties(builder);

     final List<String> description = builder.properties
         .where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
         .map((DiagnosticsNode node) => node.toString())
         .toList();

     expect(description[0], 'backgroundColor: Color(0xfffffff0)');
     expect(description[1], 'elevation: 10.0');

     // Ignore instance address for IconThemeData.
     expect(description[2].contains('selectedIconTheme: IconThemeData'), isTrue);
     expect(description[2].contains('(size: 1.0)'), isTrue);
     expect(description[3].contains('unselectedIconTheme: IconThemeData'), isTrue);
     expect(description[3].contains('(size: 2.0)'), isTrue);

     expect(description[4], 'selectedItemColor: Color(0xfffffff1)');
     expect(description[5], 'unselectedItemColor: Color(0xfffffff2)');
     expect(description[6], 'selectedLabelStyle: TextStyle(inherit: true, size: 3.0)');
     expect(description[7], 'unselectedLabelStyle: TextStyle(inherit: true, size: 4.0)');
     expect(description[8], 'showSelectedLabels: true');
     expect(description[9], 'showUnselectedLabels: true');
     expect(description[10], 'type: BottomNavigationBarType.fixed');
     expect(description[11], 'mouseCursor: MaterialStateMouseCursor(clickable)');
   });

   testWidgets('BottomNavigationBar is themeable', (WidgetTester tester) async {
     const Color backgroundColor = Color(0xFF000001);
     const Color selectedItemColor = Color(0xFF000002);
     const Color unselectedItemColor = Color(0xFF000003);
     const IconThemeData selectedIconTheme = IconThemeData(size: 10);
     const IconThemeData unselectedIconTheme = IconThemeData(size: 11);
     const TextStyle selectedTextStyle = TextStyle(fontSize: 22);
     const TextStyle unselectedTextStyle = TextStyle(fontSize: 21);
     const double elevation = 9.0;

     await tester.pumpWidget(
       MaterialApp(
         theme: ThemeData(
           bottomNavigationBarTheme: BottomNavigationBarThemeData(
             backgroundColor: backgroundColor,
             selectedItemColor: selectedItemColor,
             unselectedItemColor: unselectedItemColor,
             selectedIconTheme: selectedIconTheme,
             unselectedIconTheme: unselectedIconTheme,
             elevation: elevation,
             showUnselectedLabels: true,
             showSelectedLabels: true,
             type: BottomNavigationBarType.fixed,
             selectedLabelStyle: selectedTextStyle,
             unselectedLabelStyle: unselectedTextStyle,
             mouseCursor: MaterialStateProperty.resolveWith<MouseCursor?>((Set<MaterialState> states) {
               if (states.contains(MaterialState.selected)) {
                 return SystemMouseCursors.grab;
               }
               return SystemMouseCursors.move;
             }),
           ),
         ),
         home: Scaffold(
           bottomNavigationBar: BottomNavigationBar(
             items: const <BottomNavigationBarItem>[
               BottomNavigationBarItem(
                 icon: Icon(Icons.ac_unit),
                 label: 'AC',
               ),
               BottomNavigationBarItem(
                 icon: Icon(Icons.access_alarm),
                 label: 'Alarm',
               ),
             ],
           ),
         ),
       ),
     );

     final Finder findACTransform = find.descendant(
       of: find.byType(BottomNavigationBar),
       matching: find.ancestor(
         of: find.text('AC'),
         matching: find.byType(Transform),
       ),
     );
     final Finder findAlarmTransform = find.descendant(
       of: find.byType(BottomNavigationBar),
       matching: find.ancestor(
         of: find.text('Alarm'),
         matching: find.byType(Transform),
       ),
     );
     final TextStyle selectedFontStyle = tester.renderObject<RenderParagraph>(find.text('AC')).text.style!;
     final TextStyle selectedIcon = _iconStyle(tester, Icons.ac_unit);
     final TextStyle unselectedIcon = _iconStyle(tester, Icons.access_alarm);
     expect(selectedFontStyle.fontSize, selectedFontStyle.fontSize);
     // Unselected label has a font size of 22 but is scaled down to be font size 21.
     expect(
       tester.firstWidget<Transform>(findAlarmTransform).transform,
       equals(Matrix4.diagonal3(Vector3.all(unselectedTextStyle.fontSize! / selectedTextStyle.fontSize!))),
     );
     expect(selectedIcon.color, equals(selectedItemColor));
     expect(selectedIcon.fontSize, equals(selectedIconTheme.size));
     expect(unselectedIcon.color, equals(unselectedItemColor));
     expect(unselectedIcon.fontSize, equals(unselectedIconTheme.size));
     // There should not be any [Opacity] or [FadeTransition] widgets
     // since showUnselectedLabels and showSelectedLabels are true.
     final Finder findOpacity = find.descendant(
       of: find.byType(BottomNavigationBar),
       matching: find.byType(Opacity),
     );
     final Finder findFadeTransition = find.descendant(
       of: find.byType(BottomNavigationBar),
       matching: find.byType(FadeTransition),
     );
     expect(findOpacity, findsNothing);
     expect(findFadeTransition, findsNothing);
     expect(_material(tester).elevation, equals(elevation));
     expect(_material(tester).color, equals(backgroundColor));

     final Offset selectedBarItem = tester.getCenter(findACTransform);
     final Offset unselectedBarItem = tester.getCenter(findAlarmTransform);
     final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
     await gesture.addPointer();
     await gesture.moveTo(selectedBarItem);
     await tester.pumpAndSettle();
     expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.grab);
     await gesture.moveTo(unselectedBarItem);
     await tester.pumpAndSettle();
     expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.move);
   });

   testWidgets('BottomNavigationBar properties are taken over the theme values', (WidgetTester tester) async {
     const Color themeBackgroundColor = Color(0xFF000001);
     const Color themeSelectedItemColor = Color(0xFF000002);
     const Color themeUnselectedItemColor = Color(0xFF000003);
     const IconThemeData themeSelectedIconTheme = IconThemeData(size: 10);
     const IconThemeData themeUnselectedIconTheme = IconThemeData(size: 11);
     const TextStyle themeSelectedTextStyle = TextStyle(fontSize: 22);
     const TextStyle themeUnselectedTextStyle = TextStyle(fontSize: 21);
     const double themeElevation = 9.0;
     const BottomNavigationBarLandscapeLayout themeLandscapeLayout = BottomNavigationBarLandscapeLayout.centered;
     const MaterialStateMouseCursor themeCursor = MaterialStateMouseCursor.clickable;

     const Color backgroundColor = Color(0xFF000004);
     const Color selectedItemColor = Color(0xFF000005);
     const Color unselectedItemColor = Color(0xFF000006);
     const IconThemeData selectedIconTheme = IconThemeData(size: 15);
     const IconThemeData unselectedIconTheme = IconThemeData(size: 16);
     const TextStyle selectedTextStyle = TextStyle(fontSize: 25);
     const TextStyle unselectedTextStyle = TextStyle(fontSize: 26);
     const double elevation = 7.0;
     const BottomNavigationBarLandscapeLayout landscapeLayout = BottomNavigationBarLandscapeLayout.spread;
     const MaterialStateMouseCursor cursor = MaterialStateMouseCursor.textable;

     await tester.pumpWidget(
       MaterialApp(
         theme: ThemeData(
           bottomNavigationBarTheme: const BottomNavigationBarThemeData(
             backgroundColor: themeBackgroundColor,
             selectedItemColor: themeSelectedItemColor,
             unselectedItemColor: themeUnselectedItemColor,
             selectedIconTheme: themeSelectedIconTheme,
             unselectedIconTheme: themeUnselectedIconTheme,
             elevation: themeElevation,
             showUnselectedLabels: false,
             showSelectedLabels: false,
             type: BottomNavigationBarType.shifting,
             selectedLabelStyle: themeSelectedTextStyle,
             unselectedLabelStyle: themeUnselectedTextStyle,
             landscapeLayout: themeLandscapeLayout,
             mouseCursor: themeCursor,
           ),
         ),
         home: Scaffold(
           bottomNavigationBar: BottomNavigationBar(
             backgroundColor: backgroundColor,
             selectedItemColor: selectedItemColor,
             unselectedItemColor: unselectedItemColor,
             selectedIconTheme: selectedIconTheme,
             unselectedIconTheme: unselectedIconTheme,
             elevation: elevation,
             showUnselectedLabels: true,
             showSelectedLabels: true,
             type: BottomNavigationBarType.fixed,
             selectedLabelStyle: selectedTextStyle,
             unselectedLabelStyle: unselectedTextStyle,
             landscapeLayout: landscapeLayout,
             mouseCursor: cursor,
             items: const <BottomNavigationBarItem>[
               BottomNavigationBarItem(
                 icon: Icon(Icons.ac_unit),
                 label: 'AC',
               ),
               BottomNavigationBarItem(
                 icon: Icon(Icons.access_alarm),
                 label: 'Alarm',
               ),
             ],
           ),
         ),
       ),
     );

     Finder findDescendantOfBottomNavigationBar(Finder finder) {
       return find.descendant(
         of: find.byType(BottomNavigationBar),
         matching: finder,
       );
     }

     final TextStyle selectedFontStyle = tester.renderObject<RenderParagraph>(find.text('AC')).text.style!;
     final TextStyle selectedIcon = _iconStyle(tester, Icons.ac_unit);
     final TextStyle unselectedIcon = _iconStyle(tester, Icons.access_alarm);
     expect(selectedFontStyle.fontSize, selectedFontStyle.fontSize);
     // Unselected label has a font size of 22 but is scaled down to be font size 21.
     expect(
       tester.firstWidget<Transform>(
         findDescendantOfBottomNavigationBar(
           find.ancestor(
             of: find.text('Alarm'),
             matching: find.byType(Transform),
           ),
         ),
       ).transform,
       equals(Matrix4.diagonal3(Vector3.all(unselectedTextStyle.fontSize! / selectedTextStyle.fontSize!))),
     );
     expect(selectedIcon.color, equals(selectedItemColor));
     expect(selectedIcon.fontSize, equals(selectedIconTheme.size));
     expect(unselectedIcon.color, equals(unselectedItemColor));
     expect(unselectedIcon.fontSize, equals(unselectedIconTheme.size));
     // There should not be any [Opacity] or [FadeTransition] widgets
     // since showUnselectedLabels and showSelectedLabels are true.
     final Finder findOpacity = findDescendantOfBottomNavigationBar(
       find.byType(Opacity),
     );
     final Finder findFadeTransition = findDescendantOfBottomNavigationBar(
       find.byType(FadeTransition),
     );
     expect(findOpacity, findsNothing);
     expect(findFadeTransition, findsNothing);
     expect(_material(tester).elevation, equals(elevation));
     expect(_material(tester).color, equals(backgroundColor));

     final Offset barItem = tester.getCenter(
       findDescendantOfBottomNavigationBar(
         find.ancestor(
           of: find.text('AC'),
           matching: find.byType(Transform),
         ),
       ),
     );
     final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
     await gesture.addPointer();
     await gesture.moveTo(barItem);
     await tester.pumpAndSettle();
     expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.text);
   });

   testWidgets('BottomNavigationBarTheme can be used to hide all labels', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/66738.
     await tester.pumpWidget(
       MaterialApp(
         theme: ThemeData(
           bottomNavigationBarTheme: const BottomNavigationBarThemeData(
             showSelectedLabels: false,
             showUnselectedLabels: false,
           ),
         ),
         home: Scaffold(
           bottomNavigationBar: BottomNavigationBar(
             items: const <BottomNavigationBarItem>[
               BottomNavigationBarItem(
                 icon: Icon(Icons.ac_unit),
                 label: 'AC',
               ),
               BottomNavigationBarItem(
                 icon: Icon(Icons.access_alarm),
                 label: 'Alarm',
               ),
             ],
           ),
         ),
       ),
     );


     final Finder findVisibility = find.descendant(
       of: find.byType(BottomNavigationBar),
       matching: find.byType(Visibility),
     );

     expect(findVisibility, findsNWidgets(2));
     expect(tester.widget<Visibility>(findVisibility.at(0)).visible, false);
     expect(tester.widget<Visibility>(findVisibility.at(1)).visible, false);
   });

   testWidgets('BottomNavigationBarTheme can be used to hide selected labels', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/66738.
     await tester.pumpWidget(
       MaterialApp(
         theme: ThemeData(
           bottomNavigationBarTheme: const BottomNavigationBarThemeData(
             showSelectedLabels: false,
             showUnselectedLabels: true,
           ),
         ),
         home: Scaffold(
           bottomNavigationBar: BottomNavigationBar(
             items: const <BottomNavigationBarItem>[
               BottomNavigationBarItem(
                 icon: Icon(Icons.ac_unit),
                 label: 'AC',
               ),
               BottomNavigationBarItem(
                 icon: Icon(Icons.access_alarm),
                 label: 'Alarm',
               ),
             ],
           ),
         ),
       ),
     );


     final Finder findFadeTransition = find.descendant(
       of: find.byType(BottomNavigationBar),
       matching: find.byType(FadeTransition),
     );

     expect(findFadeTransition, findsNWidgets(2));
     expect(tester.widget<FadeTransition>(findFadeTransition.at(0)).opacity.value, 0.0);
     expect(tester.widget<FadeTransition>(findFadeTransition.at(1)).opacity.value, 1.0);
   });

   testWidgets('BottomNavigationBarTheme can be used to hide unselected labels', (WidgetTester tester) async {
     await tester.pumpWidget(
       MaterialApp(
         theme: ThemeData(
           bottomNavigationBarTheme: const BottomNavigationBarThemeData(
             showSelectedLabels: true,
             showUnselectedLabels: false,
           ),
         ),
         home: Scaffold(
           bottomNavigationBar: BottomNavigationBar(
             items: const <BottomNavigationBarItem>[
               BottomNavigationBarItem(
                 icon: Icon(Icons.ac_unit),
                 label: 'AC',
               ),
               BottomNavigationBarItem(
                 icon: Icon(Icons.access_alarm),
                 label: 'Alarm',
               ),
             ],
           ),
         ),
       ),
     );


     final Finder findFadeTransition = find.descendant(
       of: find.byType(BottomNavigationBar),
       matching: find.byType(FadeTransition),
     );

     expect(findFadeTransition, findsNWidgets(2));
     expect(tester.widget<FadeTransition>(findFadeTransition.at(0)).opacity.value, 1.0);
     expect(tester.widget<FadeTransition>(findFadeTransition.at(1)).opacity.value, 0.0);
   });
 }

 TextStyle _iconStyle(WidgetTester tester, IconData icon) {
   final RichText iconRichText = tester.widget<RichText>(
     find.descendant(of: find.byIcon(icon), matching: find.byType(RichText)),
   );
   return iconRichText.text.style!;
 }

 Material _material(WidgetTester tester) {
   return tester.firstWidget<Material>(
     find.descendant(of: find.byType(BottomNavigationBar), matching: find.byType(Material)),
   );
 }
	// 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/gestures.dart';
	import 'package:flutter/material.dart';
	import 'package:flutter/rendering.dart';
	import 'package:flutter_test/flutter_test.dart';
	import 'package:vector_math/vector_math_64.dart' show Vector3;


	void main() {
	test('BottomNavigationBarThemeData copyWith, ==, hashCode basics', () {
	expect(const BottomNavigationBarThemeData(), const BottomNavigationBarThemeData().copyWith());
	expect(const BottomNavigationBarThemeData().hashCode, const BottomNavigationBarThemeData().copyWith().hashCode);
	});

	test('BottomNavigationBarThemeData defaults', () {
	const BottomNavigationBarThemeData themeData = BottomNavigationBarThemeData();
	expect(themeData.backgroundColor, null);
	expect(themeData.elevation, null);
	expect(themeData.selectedIconTheme, null);
	expect(themeData.unselectedIconTheme, null);
	expect(themeData.selectedItemColor, null);
	expect(themeData.unselectedItemColor, null);
	expect(themeData.selectedLabelStyle, null);
	expect(themeData.unselectedLabelStyle, null);
	expect(themeData.showSelectedLabels, null);
	expect(themeData.showUnselectedLabels, null);
	expect(themeData.type, null);
	expect(themeData.landscapeLayout, null);
	expect(themeData.mouseCursor, null);

	const BottomNavigationBarTheme theme = BottomNavigationBarTheme(data: BottomNavigationBarThemeData(), child: SizedBox());
	expect(theme.data.backgroundColor, null);
	expect(theme.data.elevation, null);
	expect(theme.data.selectedIconTheme, null);
	expect(theme.data.unselectedIconTheme, null);
	expect(theme.data.selectedItemColor, null);
	expect(theme.data.unselectedItemColor, null);
	expect(theme.data.selectedLabelStyle, null);
	expect(theme.data.unselectedLabelStyle, null);
	expect(theme.data.showSelectedLabels, null);
	expect(theme.data.showUnselectedLabels, null);
	expect(theme.data.type, null);
	expect(themeData.landscapeLayout, null);
	expect(themeData.mouseCursor, null);
	});

	testWidgets('Default BottomNavigationBarThemeData debugFillProperties', (WidgetTester tester) async {
	final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
	const BottomNavigationBarThemeData().debugFillProperties(builder);

	final List<String> description = builder.properties
	.where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
	.map((DiagnosticsNode node) => node.toString())
	.toList();

	expect(description, <String>[]);
	});

	testWidgets('BottomNavigationBarThemeData implements debugFillProperties', (WidgetTester tester) async {
	final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
	const BottomNavigationBarThemeData(
	backgroundColor: Color(0xfffffff0),
	elevation: 10.0,
	selectedIconTheme: IconThemeData(size: 1.0),
	unselectedIconTheme: IconThemeData(size: 2.0),
	selectedItemColor: Color(0xfffffff1),
	unselectedItemColor: Color(0xfffffff2),
	selectedLabelStyle: TextStyle(fontSize: 3.0),
	unselectedLabelStyle: TextStyle(fontSize: 4.0),
	showSelectedLabels: true,
	showUnselectedLabels: true,
	type: BottomNavigationBarType.fixed,
	mouseCursor: MaterialStateMouseCursor.clickable,
	).debugFillProperties(builder);

	final List<String> description = builder.properties
	.where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
	.map((DiagnosticsNode node) => node.toString())
	.toList();

	expect(description[0], 'backgroundColor: Color(0xfffffff0)');
	expect(description[1], 'elevation: 10.0');

	// Ignore instance address for IconThemeData.
	expect(description[2].contains('selectedIconTheme: IconThemeData'), isTrue);
	expect(description[2].contains('(size: 1.0)'), isTrue);
	expect(description[3].contains('unselectedIconTheme: IconThemeData'), isTrue);
	expect(description[3].contains('(size: 2.0)'), isTrue);

	expect(description[4], 'selectedItemColor: Color(0xfffffff1)');
	expect(description[5], 'unselectedItemColor: Color(0xfffffff2)');
	expect(description[6], 'selectedLabelStyle: TextStyle(inherit: true, size: 3.0)');
	expect(description[7], 'unselectedLabelStyle: TextStyle(inherit: true, size: 4.0)');
	expect(description[8], 'showSelectedLabels: true');
	expect(description[9], 'showUnselectedLabels: true');
	expect(description[10], 'type: BottomNavigationBarType.fixed');
	expect(description[11], 'mouseCursor: MaterialStateMouseCursor(clickable)');
	});

	testWidgets('BottomNavigationBar is themeable', (WidgetTester tester) async {
	const Color backgroundColor = Color(0xFF000001);
	const Color selectedItemColor = Color(0xFF000002);
	const Color unselectedItemColor = Color(0xFF000003);
	const IconThemeData selectedIconTheme = IconThemeData(size: 10);
	const IconThemeData unselectedIconTheme = IconThemeData(size: 11);
	const TextStyle selectedTextStyle = TextStyle(fontSize: 22);
	const TextStyle unselectedTextStyle = TextStyle(fontSize: 21);
	const double elevation = 9.0;

	await tester.pumpWidget(
	MaterialApp(
	theme: ThemeData(
	bottomNavigationBarTheme: BottomNavigationBarThemeData(
	backgroundColor: backgroundColor,
	selectedItemColor: selectedItemColor,
	unselectedItemColor: unselectedItemColor,
	selectedIconTheme: selectedIconTheme,
	unselectedIconTheme: unselectedIconTheme,
	elevation: elevation,
	showUnselectedLabels: true,
	showSelectedLabels: true,
	type: BottomNavigationBarType.fixed,
	selectedLabelStyle: selectedTextStyle,
	unselectedLabelStyle: unselectedTextStyle,
	mouseCursor: MaterialStateProperty.resolveWith<MouseCursor?>((Set<MaterialState> states) {
	if (states.contains(MaterialState.selected)) {
	return SystemMouseCursors.grab;
	}
	return SystemMouseCursors.move;
	}),
	),
	),
	home: Scaffold(
	bottomNavigationBar: BottomNavigationBar(
	items: const <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: Icon(Icons.ac_unit),
	label: 'AC',
	),
	BottomNavigationBarItem(
	icon: Icon(Icons.access_alarm),
	label: 'Alarm',
	),
	],
	),
	),
	),
	);

	final Finder findACTransform = find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: find.ancestor(
	of: find.text('AC'),
	matching: find.byType(Transform),
	),
	);
	final Finder findAlarmTransform = find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: find.ancestor(
	of: find.text('Alarm'),
	matching: find.byType(Transform),
	),
	);
	final TextStyle selectedFontStyle = tester.renderObject<RenderParagraph>(find.text('AC')).text.style!;
	final TextStyle selectedIcon = _iconStyle(tester, Icons.ac_unit);
	final TextStyle unselectedIcon = _iconStyle(tester, Icons.access_alarm);
	expect(selectedFontStyle.fontSize, selectedFontStyle.fontSize);
	// Unselected label has a font size of 22 but is scaled down to be font size 21.
	expect(
	tester.firstWidget<Transform>(findAlarmTransform).transform,
	equals(Matrix4.diagonal3(Vector3.all(unselectedTextStyle.fontSize! / selectedTextStyle.fontSize!))),
	);
	expect(selectedIcon.color, equals(selectedItemColor));
	expect(selectedIcon.fontSize, equals(selectedIconTheme.size));
	expect(unselectedIcon.color, equals(unselectedItemColor));
	expect(unselectedIcon.fontSize, equals(unselectedIconTheme.size));
	// There should not be any [Opacity] or [FadeTransition] widgets
	// since showUnselectedLabels and showSelectedLabels are true.
	final Finder findOpacity = find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: find.byType(Opacity),
	);
	final Finder findFadeTransition = find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: find.byType(FadeTransition),
	);
	expect(findOpacity, findsNothing);
	expect(findFadeTransition, findsNothing);
	expect(_material(tester).elevation, equals(elevation));
	expect(_material(tester).color, equals(backgroundColor));

	final Offset selectedBarItem = tester.getCenter(findACTransform);
	final Offset unselectedBarItem = tester.getCenter(findAlarmTransform);
	final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
	await gesture.addPointer();
	await gesture.moveTo(selectedBarItem);
	await tester.pumpAndSettle();
	expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.grab);
	await gesture.moveTo(unselectedBarItem);
	await tester.pumpAndSettle();
	expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.move);
	});

	testWidgets('BottomNavigationBar properties are taken over the theme values', (WidgetTester tester) async {
	const Color themeBackgroundColor = Color(0xFF000001);
	const Color themeSelectedItemColor = Color(0xFF000002);
	const Color themeUnselectedItemColor = Color(0xFF000003);
	const IconThemeData themeSelectedIconTheme = IconThemeData(size: 10);
	const IconThemeData themeUnselectedIconTheme = IconThemeData(size: 11);
	const TextStyle themeSelectedTextStyle = TextStyle(fontSize: 22);
	const TextStyle themeUnselectedTextStyle = TextStyle(fontSize: 21);
	const double themeElevation = 9.0;
	const BottomNavigationBarLandscapeLayout themeLandscapeLayout = BottomNavigationBarLandscapeLayout.centered;
	const MaterialStateMouseCursor themeCursor = MaterialStateMouseCursor.clickable;

	const Color backgroundColor = Color(0xFF000004);
	const Color selectedItemColor = Color(0xFF000005);
	const Color unselectedItemColor = Color(0xFF000006);
	const IconThemeData selectedIconTheme = IconThemeData(size: 15);
	const IconThemeData unselectedIconTheme = IconThemeData(size: 16);
	const TextStyle selectedTextStyle = TextStyle(fontSize: 25);
	const TextStyle unselectedTextStyle = TextStyle(fontSize: 26);
	const double elevation = 7.0;
	const BottomNavigationBarLandscapeLayout landscapeLayout = BottomNavigationBarLandscapeLayout.spread;
	const MaterialStateMouseCursor cursor = MaterialStateMouseCursor.textable;

	await tester.pumpWidget(
	MaterialApp(
	theme: ThemeData(
	bottomNavigationBarTheme: const BottomNavigationBarThemeData(
	backgroundColor: themeBackgroundColor,
	selectedItemColor: themeSelectedItemColor,
	unselectedItemColor: themeUnselectedItemColor,
	selectedIconTheme: themeSelectedIconTheme,
	unselectedIconTheme: themeUnselectedIconTheme,
	elevation: themeElevation,
	showUnselectedLabels: false,
	showSelectedLabels: false,
	type: BottomNavigationBarType.shifting,
	selectedLabelStyle: themeSelectedTextStyle,
	unselectedLabelStyle: themeUnselectedTextStyle,
	landscapeLayout: themeLandscapeLayout,
	mouseCursor: themeCursor,
	),
	),
	home: Scaffold(
	bottomNavigationBar: BottomNavigationBar(
	backgroundColor: backgroundColor,
	selectedItemColor: selectedItemColor,
	unselectedItemColor: unselectedItemColor,
	selectedIconTheme: selectedIconTheme,
	unselectedIconTheme: unselectedIconTheme,
	elevation: elevation,
	showUnselectedLabels: true,
	showSelectedLabels: true,
	type: BottomNavigationBarType.fixed,
	selectedLabelStyle: selectedTextStyle,
	unselectedLabelStyle: unselectedTextStyle,
	landscapeLayout: landscapeLayout,
	mouseCursor: cursor,
	items: const <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: Icon(Icons.ac_unit),
	label: 'AC',
	),
	BottomNavigationBarItem(
	icon: Icon(Icons.access_alarm),
	label: 'Alarm',
	),
	],
	),
	),
	),
	);

	Finder findDescendantOfBottomNavigationBar(Finder finder) {
	return find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: finder,
	);
	}

	final TextStyle selectedFontStyle = tester.renderObject<RenderParagraph>(find.text('AC')).text.style!;
	final TextStyle selectedIcon = _iconStyle(tester, Icons.ac_unit);
	final TextStyle unselectedIcon = _iconStyle(tester, Icons.access_alarm);
	expect(selectedFontStyle.fontSize, selectedFontStyle.fontSize);
	// Unselected label has a font size of 22 but is scaled down to be font size 21.
	expect(
	tester.firstWidget<Transform>(
	findDescendantOfBottomNavigationBar(
	find.ancestor(
	of: find.text('Alarm'),
	matching: find.byType(Transform),
	),
	),
	).transform,
	equals(Matrix4.diagonal3(Vector3.all(unselectedTextStyle.fontSize! / selectedTextStyle.fontSize!))),
	);
	expect(selectedIcon.color, equals(selectedItemColor));
	expect(selectedIcon.fontSize, equals(selectedIconTheme.size));
	expect(unselectedIcon.color, equals(unselectedItemColor));
	expect(unselectedIcon.fontSize, equals(unselectedIconTheme.size));
	// There should not be any [Opacity] or [FadeTransition] widgets
	// since showUnselectedLabels and showSelectedLabels are true.
	final Finder findOpacity = findDescendantOfBottomNavigationBar(
	find.byType(Opacity),
	);
	final Finder findFadeTransition = findDescendantOfBottomNavigationBar(
	find.byType(FadeTransition),
	);
	expect(findOpacity, findsNothing);
	expect(findFadeTransition, findsNothing);
	expect(_material(tester).elevation, equals(elevation));
	expect(_material(tester).color, equals(backgroundColor));

	final Offset barItem = tester.getCenter(
	findDescendantOfBottomNavigationBar(
	find.ancestor(
	of: find.text('AC'),
	matching: find.byType(Transform),
	),
	),
	);
	final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
	await gesture.addPointer();
	await gesture.moveTo(barItem);
	await tester.pumpAndSettle();
	expect(RendererBinding.instance.mouseTracker.debugDeviceActiveCursor(1), SystemMouseCursors.text);
	});

	testWidgets('BottomNavigationBarTheme can be used to hide all labels', (WidgetTester tester) async {
	// Regression test for https://github.com/flutter/flutter/issues/66738.
	await tester.pumpWidget(
	MaterialApp(
	theme: ThemeData(
	bottomNavigationBarTheme: const BottomNavigationBarThemeData(
	showSelectedLabels: false,
	showUnselectedLabels: false,
	),
	),
	home: Scaffold(
	bottomNavigationBar: BottomNavigationBar(
	items: const <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: Icon(Icons.ac_unit),
	label: 'AC',
	),
	BottomNavigationBarItem(
	icon: Icon(Icons.access_alarm),
	label: 'Alarm',
	),
	],
	),
	),
	),
	);


	final Finder findVisibility = find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: find.byType(Visibility),
	);

	expect(findVisibility, findsNWidgets(2));
	expect(tester.widget<Visibility>(findVisibility.at(0)).visible, false);
	expect(tester.widget<Visibility>(findVisibility.at(1)).visible, false);
	});

	testWidgets('BottomNavigationBarTheme can be used to hide selected labels', (WidgetTester tester) async {
	// Regression test for https://github.com/flutter/flutter/issues/66738.
	await tester.pumpWidget(
	MaterialApp(
	theme: ThemeData(
	bottomNavigationBarTheme: const BottomNavigationBarThemeData(
	showSelectedLabels: false,
	showUnselectedLabels: true,
	),
	),
	home: Scaffold(
	bottomNavigationBar: BottomNavigationBar(
	items: const <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: Icon(Icons.ac_unit),
	label: 'AC',
	),
	BottomNavigationBarItem(
	icon: Icon(Icons.access_alarm),
	label: 'Alarm',
	),
	],
	),
	),
	),
	);


	final Finder findFadeTransition = find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: find.byType(FadeTransition),
	);

	expect(findFadeTransition, findsNWidgets(2));
	expect(tester.widget<FadeTransition>(findFadeTransition.at(0)).opacity.value, 0.0);
	expect(tester.widget<FadeTransition>(findFadeTransition.at(1)).opacity.value, 1.0);
	});

	testWidgets('BottomNavigationBarTheme can be used to hide unselected labels', (WidgetTester tester) async {
	await tester.pumpWidget(
	MaterialApp(
	theme: ThemeData(
	bottomNavigationBarTheme: const BottomNavigationBarThemeData(
	showSelectedLabels: true,
	showUnselectedLabels: false,
	),
	),
	home: Scaffold(
	bottomNavigationBar: BottomNavigationBar(
	items: const <BottomNavigationBarItem>[
	BottomNavigationBarItem(
	icon: Icon(Icons.ac_unit),
	label: 'AC',
	),
	BottomNavigationBarItem(
	icon: Icon(Icons.access_alarm),
	label: 'Alarm',
	),
	],
	),
	),
	),
	);


	final Finder findFadeTransition = find.descendant(
	of: find.byType(BottomNavigationBar),
	matching: find.byType(FadeTransition),
	);

	expect(findFadeTransition, findsNWidgets(2));
	expect(tester.widget<FadeTransition>(findFadeTransition.at(0)).opacity.value, 1.0);
	expect(tester.widget<FadeTransition>(findFadeTransition.at(1)).opacity.value, 0.0);
	});
	}

	TextStyle _iconStyle(WidgetTester tester, IconData icon) {
	final RichText iconRichText = tester.widget<RichText>(
	find.descendant(of: find.byIcon(icon), matching: find.byType(RichText)),
	);
	return iconRichText.text.style!;
	}

	Material _material(WidgetTester tester) {
	return tester.firstWidget<Material>(
	find.descendant(of: find.byType(BottomNavigationBar), matching: find.byType(Material)),
	);
	}