segmented_control_test.dart 50.4 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.

import 'package:flutter/widgets.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter_test/flutter_test.dart';

import '../widgets/semantics_tester.dart';

dynamic getRenderSegmentedControl(WidgetTester tester) {
  return tester.allRenderObjects.firstWhere(
    (RenderObject currentObject) {
      return currentObject.toStringShort().contains('_RenderSegmentedControl');
    },
  );
}

StatefulBuilder setupSimpleSegmentedControl() {
  final Map<int, Widget> children = <int, Widget>{};
  children[0] = const Text('Child 1');
  children[1] = const Text('Child 2');
  int sharedValue = 0;

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  return StatefulBuilder(
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    builder: (BuildContext context, StateSetter setState) {
      return boilerplate(
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        child: CupertinoSegmentedControl<int>(
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          children: children,
          onValueChanged: (int newValue) {
            setState(() {
              sharedValue = newValue;
            });
          },
          groupValue: sharedValue,
        ),
      );
    },
  );
}

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Widget boilerplate({ required Widget child }) {
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  return Directionality(
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    textDirection: TextDirection.ltr,
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    child: Center(child: child),
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  );
}

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Color getBackgroundColor(WidgetTester tester, int childIndex) {
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  return getRenderSegmentedControl(tester).backgroundColors[childIndex] as Color;
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}

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void main() {
  testWidgets('Tap changes toggle state', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');
    children[2] = const Text('Child 3');

    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    expect(sharedValue, 0);

    await tester.tap(find.byKey(const ValueKey<String>('Segmented Control')));

    expect(sharedValue, 1);
  });

  testWidgets('Need at least 2 children', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
    try {
      await tester.pumpWidget(
        boilerplate(
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          child: CupertinoSegmentedControl<int>(
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            children: children,
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            onValueChanged: (int newValue) { },
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          ),
        ),
      );
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      fail('Should not be possible to create a segmented control with no children');
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    } on AssertionError catch (e) {
      expect(e.toString(), contains('children.length'));
    }
    try {
      children[0] = const Text('Child 1');

      await tester.pumpWidget(
        boilerplate(
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          child: CupertinoSegmentedControl<int>(
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            children: children,
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            onValueChanged: (int newValue) { },
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          ),
        ),
      );
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      fail('Should not be possible to create a segmented control with just one child');
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    } on AssertionError catch (e) {
      expect(e.toString(), contains('children.length'));
    }
  });

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  testWidgets('Padding works', (WidgetTester tester) async {
    const Key key = Key('Container');

    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const SizedBox(
      height: double.infinity,
      child: Text('Child 1'),
    ) ;
    children[1] = const SizedBox(
      height: double.infinity,
      child: Text('Child 2'),
    ) ;

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    Future<void> verifyPadding({ EdgeInsets? padding }) async {
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      final EdgeInsets effectivePadding = padding ?? const EdgeInsets.symmetric(horizontal: 16);
      final Rect segmentedControlRect = tester.getRect(find.byKey(key));
      expect(
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          tester.getTopLeft(find.byWidget(children[0]!)),
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          segmentedControlRect.topLeft.translate(
            effectivePadding.topLeft.dx,
            effectivePadding.topLeft.dy,
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          ),
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      );
      expect(
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        tester.getBottomLeft(find.byWidget(children[0]!)),
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        segmentedControlRect.bottomLeft.translate(
          effectivePadding.bottomLeft.dx,
          effectivePadding.bottomLeft.dy,
        ),
      );

      expect(
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        tester.getTopRight(find.byWidget(children[1]!)),
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        segmentedControlRect.topRight.translate(
          effectivePadding.topRight.dx,
          effectivePadding.topRight.dy,
        ),
      );
      expect(
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        tester.getBottomRight(find.byWidget(children[1]!)),
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        segmentedControlRect.bottomRight.translate(
          effectivePadding.bottomRight.dx,
          effectivePadding.bottomRight.dy,
        ),
      );
    }

    await tester.pumpWidget(
        boilerplate(
          child: CupertinoSegmentedControl<int>(
            key: key,
            children: children,
            onValueChanged: (int newValue) { },
          ),
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        ),
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    );

    // Default padding works.
    await verifyPadding();

    // Switch to Child 2 padding should remain the same.
    await tester.tap(find.text('Child 2'));
    await tester.pumpAndSettle();

    await verifyPadding();

    await tester.pumpWidget(
        boilerplate(
          child: CupertinoSegmentedControl<int>(
            key: key,
            padding: const EdgeInsets.fromLTRB(1, 3, 5, 7),
            children: children,
            onValueChanged: (int newValue) { },
          ),
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        ),
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    );

    // Custom padding works.
    await verifyPadding(padding: const EdgeInsets.fromLTRB(1, 3, 5, 7));

    // Switch back to Child 1 padding should remain the same.
    await tester.tap(find.text('Child 1'));
    await tester.pumpAndSettle();

    await verifyPadding(padding: const EdgeInsets.fromLTRB(1, 3, 5, 7));
  });

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  testWidgets('Value attribute must be the key of one of the children widgets', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

    try {
      await tester.pumpWidget(
        boilerplate(
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          child: CupertinoSegmentedControl<int>(
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            children: children,
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            onValueChanged: (int newValue) { },
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            groupValue: 2,
          ),
        ),
      );
      fail('Should not be possible to create segmented control in which '
          'value is not the key of one of the children widgets');
    } on AssertionError catch (e) {
      expect(e.toString(), contains('children'));
    }
  });

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  testWidgets('Widgets have correct default text/icon styles, change correctly on selection', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Icon(IconData(1));

    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

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    await tester.pumpAndSettle();

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    DefaultTextStyle textStyle = tester.widget(find.widgetWithText(DefaultTextStyle, 'Child 1'));
    IconTheme iconTheme = tester.widget(find.widgetWithIcon(IconTheme, const IconData(1)));
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    expect(textStyle.style.color, isSameColorAs(CupertinoColors.white));
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    expect(iconTheme.data.color, CupertinoColors.activeBlue);

    await tester.tap(find.widgetWithIcon(IconTheme, const IconData(1)));
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    await tester.pumpAndSettle();
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    textStyle = tester.widget(find.widgetWithText(DefaultTextStyle, 'Child 1'));
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    iconTheme = tester.widget(find.widgetWithIcon(IconTheme, const IconData(1)));
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    expect(textStyle.style.color, CupertinoColors.activeBlue);
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    expect(iconTheme.data.color, isSameColorAs(CupertinoColors.white));
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  });

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  testWidgets(
    'Segmented controls respects themes',
    (WidgetTester tester) async {
      final Map<int, Widget> children = <int, Widget>{};
      children[0] = const Text('Child 1');
      children[1] = const Icon(IconData(1));

      int sharedValue = 0;

      await tester.pumpWidget(
        CupertinoApp(
          theme: const CupertinoThemeData(brightness: Brightness.dark),
          home: StatefulBuilder(
            builder: (BuildContext context, StateSetter setState) {
              return CupertinoSegmentedControl<int>(
                children: children,
                onValueChanged: (int newValue) {
                  setState(() {
                    sharedValue = newValue;
                  });
                },
                groupValue: sharedValue,
              );
            },
          ),
        ),
      );

      DefaultTextStyle textStyle = tester.widget(find.widgetWithText(DefaultTextStyle, 'Child 1').first);
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      IconThemeData iconTheme = IconTheme.of(tester.element(find.byIcon(const IconData(1))));
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      expect(textStyle.style.color, isSameColorAs(CupertinoColors.black));
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      expect(iconTheme.color, isSameColorAs(CupertinoColors.systemBlue.darkColor));
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      await tester.tap(find.byIcon(const IconData(1)));
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      await tester.pump();
      await tester.pump(const Duration(milliseconds: 500));

      textStyle = tester.widget(find.widgetWithText(DefaultTextStyle, 'Child 1').first);
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      iconTheme = IconTheme.of(tester.element(find.byIcon(const IconData(1))));
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      expect(textStyle.style.color, isSameColorAs(CupertinoColors.systemBlue.darkColor));
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      expect(iconTheme.color, isSameColorAs(CupertinoColors.black));
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    },
  );

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  testWidgets('SegmentedControl is correct when user provides custom colors', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Icon(IconData(1));
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    int sharedValue = 0;
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    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
              unselectedColor: CupertinoColors.lightBackgroundGray,
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              selectedColor: CupertinoColors.activeGreen.color,
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              borderColor: CupertinoColors.black,
              pressedColor: const Color(0x638CFC7B),
            ),
          );
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        },
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      ),
    );
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    DefaultTextStyle textStyle = tester.widget(find.widgetWithText(DefaultTextStyle, 'Child 1'));
    IconTheme iconTheme = tester.widget(find.widgetWithIcon(IconTheme, const IconData(1)));
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    expect(getRenderSegmentedControl(tester).borderColor, CupertinoColors.black);
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    expect(textStyle.style.color, CupertinoColors.lightBackgroundGray);
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    expect(iconTheme.data.color, CupertinoColors.activeGreen.color);
    expect(getBackgroundColor(tester, 0), CupertinoColors.activeGreen.color);
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    expect(getBackgroundColor(tester, 1), CupertinoColors.lightBackgroundGray);
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    await tester.tap(find.widgetWithIcon(IconTheme, const IconData(1)));
    await tester.pumpAndSettle();
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    textStyle = tester.widget(find.widgetWithText(DefaultTextStyle, 'Child 1'));
    iconTheme = tester.widget(find.widgetWithIcon(IconTheme, const IconData(1)));
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    expect(textStyle.style.color, CupertinoColors.activeGreen.color);
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    expect(iconTheme.data.color, CupertinoColors.lightBackgroundGray);
    expect(getBackgroundColor(tester, 0), CupertinoColors.lightBackgroundGray);
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeGreen.color);
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    final Offset center = tester.getCenter(find.text('Child 1'));
    await tester.startGesture(center);
    await tester.pumpAndSettle();
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    expect(getBackgroundColor(tester, 0), const Color(0x638CFC7B));
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeGreen.color);
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  });
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  testWidgets('Widgets are centered within segments', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

    await tester.pumpWidget(
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      Directionality(
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        textDirection: TextDirection.ltr,
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        child: Align(
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          alignment: Alignment.topLeft,
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          child: SizedBox(
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            width: 200.0,
            height: 200.0,
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            child: CupertinoSegmentedControl<int>(
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              children: children,
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              onValueChanged: (int newValue) { },
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            ),
          ),
        ),
      ),
    );

    // Widgets are centered taking into account 16px of horizontal padding
    expect(tester.getCenter(find.text('Child 1')), const Offset(58.0, 100.0));
    expect(tester.getCenter(find.text('Child 2')), const Offset(142.0, 100.0));
  });
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  testWidgets('Tap calls onValueChanged', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

    bool value = false;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                value = true;
              },
            ),
          );
        },
      ),
    );

    expect(value, isFalse);

    await tester.tap(find.text('Child 2'));

    expect(value, isTrue);
  });

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  testWidgets('State does not change if onValueChanged does not call setState()', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

    const int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
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              onValueChanged: (int newValue) { },
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              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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    await tester.tap(find.text('Child 2'));
    await tester.pump();

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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  });

  testWidgets(
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    'Background color of child should change on selection, '
    'and should not change when tapped again',
    (WidgetTester tester) async {
      await tester.pumpWidget(setupSimpleSegmentedControl());
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      expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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      await tester.tap(find.text('Child 2'));
      await tester.pumpAndSettle(const Duration(milliseconds: 200));
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      expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
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      await tester.tap(find.text('Child 2'));
      await tester.pump();
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      expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
    },
  );
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  testWidgets(
    'Children can be non-Text or Icon widgets (in this case, '
        'a Container or Placeholder widget)',
    (WidgetTester tester) async {
      final Map<int, Widget> children = <int, Widget>{};
      children[0] = const Text('Child 1');
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      children[1] = Container(
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        constraints: const BoxConstraints.tightFor(width: 50.0, height: 50.0),
      );
      children[2] = const Placeholder();

      int sharedValue = 0;

      await tester.pumpWidget(
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        StatefulBuilder(
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          builder: (BuildContext context, StateSetter setState) {
            return boilerplate(
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              child: CupertinoSegmentedControl<int>(
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                children: children,
                onValueChanged: (int newValue) {
                  setState(() {
                    sharedValue = newValue;
                  });
                },
                groupValue: sharedValue,
              ),
            );
          },
        ),
      );
    },
  );

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  testWidgets('Passed in value is child initially selected', (WidgetTester tester) async {
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    await tester.pumpWidget(setupSimpleSegmentedControl());

    expect(getRenderSegmentedControl(tester).selectedIndex, 0);

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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  });

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  testWidgets('Null input for value results in no child initially selected', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

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    int? sharedValue;
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    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    expect(getRenderSegmentedControl(tester).selectedIndex, null);

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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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  });

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  testWidgets('Long press changes background color of not-selected child', (WidgetTester tester) async {
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    await tester.pumpWidget(setupSimpleSegmentedControl());

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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    final Offset center = tester.getCenter(find.text('Child 2'));
    await tester.startGesture(center);
    await tester.pumpAndSettle();

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));
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  });

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  testWidgets('Long press does not change background color of currently-selected child', (WidgetTester tester) async {
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    await tester.pumpWidget(setupSimpleSegmentedControl());

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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    final Offset center = tester.getCenter(find.text('Child 1'));
    await tester.startGesture(center);
    await tester.pumpAndSettle();

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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  });

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  testWidgets('Height of segmented control is determined by tallest widget', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
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    children[0] = Container(
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      constraints: const BoxConstraints.tightFor(height: 100.0),
    );
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    children[1] = Container(
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      constraints: const BoxConstraints.tightFor(height: 400.0),
    );
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    children[2] = Container(
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      constraints: const BoxConstraints.tightFor(height: 200.0),
    );

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              key: const ValueKey<String>('Segmented Control'),
              children: children,
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              onValueChanged: (int newValue) { },
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            ),
          );
        },
      ),
    );

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    final RenderBox buttonBox = tester.renderObject(
        find.byKey(const ValueKey<String>('Segmented Control')));
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    expect(buttonBox.size.height, 400.0);
  });

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  testWidgets('Width of each segmented control segment is determined by widest widget', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
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    children[0] = Container(
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      constraints: const BoxConstraints.tightFor(width: 50.0),
    );
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    children[1] = Container(
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      constraints: const BoxConstraints.tightFor(width: 100.0),
    );
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    children[2] = Container(
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      constraints: const BoxConstraints.tightFor(width: 200.0),
    );
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    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              key: const ValueKey<String>('Segmented Control'),
              children: children,
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              onValueChanged: (int newValue) { },
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            ),
          );
        },
      ),
    );

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    final RenderBox segmentedControl = tester.renderObject(
        find.byKey(const ValueKey<String>('Segmented Control')));
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    // Subtract the 16.0px from each side. Remaining width should be allocated
    // to each child equally.
    final double childWidth = (segmentedControl.size.width - 32.0) / 3;

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    expect(childWidth, 200.0);

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    expect(childWidth,
        getRenderSegmentedControl(tester).getChildrenAsList()[0].parentData.surroundingRect.width);
    expect(childWidth,
        getRenderSegmentedControl(tester).getChildrenAsList()[1].parentData.surroundingRect.width);
    expect(childWidth,
        getRenderSegmentedControl(tester).getChildrenAsList()[2].parentData.surroundingRect.width);
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  });

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  testWidgets('Width is finite in unbounded space', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
            child: Row(
              children: <Widget>[
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                CupertinoSegmentedControl<int>(
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                  key: const ValueKey<String>('Segmented Control'),
                  children: children,
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                  onValueChanged: (int newValue) { },
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                ),
              ],
            ),
          );
        },
      ),
    );

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    final RenderBox segmentedControl = tester.renderObject(
        find.byKey(const ValueKey<String>('Segmented Control')));
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    expect(segmentedControl.size.width.isFinite, isTrue);
  });

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  testWidgets('Directionality test - RTL should reverse order of widgets', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.rtl,
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        child: Center(
          child: CupertinoSegmentedControl<int>(
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            children: children,
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            onValueChanged: (int newValue) { },
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          ),
        ),
      ),
    );

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    expect(tester.getTopRight(find.text('Child 1')).dx >
        tester.getTopRight(find.text('Child 2')).dx, isTrue);
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  });

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  testWidgets('Correct initial selection and toggling behavior - RTL', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');

    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return Directionality(
            textDirection: TextDirection.rtl,
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            child: Center(
              child: CupertinoSegmentedControl<int>(
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                children: children,
                onValueChanged: (int newValue) {
                  setState(() {
                    sharedValue = newValue;
                  });
                },
                groupValue: sharedValue,
              ),
            ),
          );
        },
      ),
    );

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    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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    await tester.tap(find.text('Child 2'));
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    await tester.pumpAndSettle();
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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
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    await tester.tap(find.text('Child 2'));
    await tester.pump();

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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
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  });

  testWidgets('Segmented control semantics', (WidgetTester tester) async {
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    final SemanticsTester semantics = SemanticsTester(tester);
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');
    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return Directionality(
            textDirection: TextDirection.ltr,
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            child: Center(
              child: CupertinoSegmentedControl<int>(
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                children: children,
                onValueChanged: (int newValue) {
                  setState(() {
                    sharedValue = newValue;
                  });
                },
                groupValue: sharedValue,
              ),
            ),
          );
        },
      ),
    );

    expect(
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      semantics,
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        hasSemantics(
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          TestSemantics.root(
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            children: <TestSemantics>[
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              TestSemantics.rootChild(
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                label: 'Child 1',
                flags: <SemanticsFlag>[
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                  SemanticsFlag.isButton,
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                  SemanticsFlag.isInMutuallyExclusiveGroup,
                  SemanticsFlag.isSelected,
                ],
                actions: <SemanticsAction>[
                  SemanticsAction.tap,
                ],
              ),
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              TestSemantics.rootChild(
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                label: 'Child 2',
                flags: <SemanticsFlag>[
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                  SemanticsFlag.isButton,
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                  SemanticsFlag.isInMutuallyExclusiveGroup,
                ],
                actions: <SemanticsAction>[
                  SemanticsAction.tap,
                ],
              ),
            ],
          ),
          ignoreId: true,
          ignoreRect: true,
          ignoreTransform: true,
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        ),
    );
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    await tester.tap(find.text('Child 2'));
    await tester.pump();

    expect(
        semantics,
        hasSemantics(
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          TestSemantics.root(
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            children: <TestSemantics>[
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              TestSemantics.rootChild(
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                label: 'Child 1',
                flags: <SemanticsFlag>[
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                  SemanticsFlag.isButton,
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                  SemanticsFlag.isInMutuallyExclusiveGroup,
                ],
                actions: <SemanticsAction>[
                  SemanticsAction.tap,
                ],
              ),
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              TestSemantics.rootChild(
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                label: 'Child 2',
                flags: <SemanticsFlag>[
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                  SemanticsFlag.isButton,
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                  SemanticsFlag.isInMutuallyExclusiveGroup,
                  SemanticsFlag.isSelected,
                ],
                actions: <SemanticsAction>[
                  SemanticsAction.tap,
                ],
              ),
            ],
          ),
          ignoreId: true,
          ignoreRect: true,
          ignoreTransform: true,
        ));

    semantics.dispose();
  });

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  testWidgets('Non-centered taps work on smaller widgets', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
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    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');
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    int sharedValue = 1;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    expect(sharedValue, 1);

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    final double childWidth = getRenderSegmentedControl(tester).firstChild.size.width as double;
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    final Offset centerOfSegmentedControl = tester.getCenter(find.text('Child 1'));
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    // Tap just inside segment bounds
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    await tester.tapAt(
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      Offset(
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        centerOfSegmentedControl.dx + (childWidth / 2) - 10.0,
        centerOfSegmentedControl.dy,
      ),
    );
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    expect(sharedValue, 0);
  });

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  testWidgets('Hit-tests report accurate local position in segments', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
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    late TapDownDetails tapDownDetails;
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    children[0] = GestureDetector(
      behavior: HitTestBehavior.opaque,
      onTapDown: (TapDownDetails details) { tapDownDetails = details; },
      child: const SizedBox(width: 200, height: 200),
    );
    children[1] = const Text('Child 2');

    int sharedValue = 1;

    await tester.pumpWidget(
      StatefulBuilder(
        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
            child: CupertinoSegmentedControl<int>(
              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    expect(sharedValue, 1);

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    final Offset segment0GlobalOffset = tester.getTopLeft(find.byWidget(children[0]!));
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    await tester.tapAt(segment0GlobalOffset + const Offset(7, 11));

    expect(tapDownDetails.localPosition, const Offset(7, 11));
    expect(tapDownDetails.globalPosition, segment0GlobalOffset + const Offset(7, 11));
  });

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  testWidgets(
    'Segment still hittable with a child that has no hitbox',
    (WidgetTester tester) async {
      // Regression test for https://github.com/flutter/flutter/issues/57326.
      final Map<int, Widget> children = <int, Widget>{};
      children[0] = const Text('Child 1');
      children[1] = const SizedBox();
      int sharedValue = 0;

      await tester.pumpWidget(
        StatefulBuilder(
          builder: (BuildContext context, StateSetter setState) {
            return boilerplate(
              child: CupertinoSegmentedControl<int>(
                key: const ValueKey<String>('Segmented Control'),
                children: children,
                onValueChanged: (int newValue) {
                  setState(() {
                    sharedValue = newValue;
                  });
                },
                groupValue: sharedValue,
              ),
            );
          },
        ),
      );

      expect(sharedValue, 0);

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      final Offset centerOfTwo = tester.getCenter(find.byWidget(children[1]!));
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      // Tap within the bounds of children[1], but not at the center.
      // children[1] is a SizedBox thus not hittable by itself.
      await tester.tapAt(centerOfTwo + const Offset(10, 0));

      expect(sharedValue, 1);
  });

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  testWidgets('Animation is correct when the selected segment changes', (WidgetTester tester) async {
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    await tester.pumpWidget(setupSimpleSegmentedControl());

    await tester.tap(find.text('Child 2'));

    await tester.pump();
    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xff3d9aff));
    expect(getBackgroundColor(tester, 1), const Color(0x64007aff));

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xff7bbaff));
    expect(getBackgroundColor(tester, 1), const Color(0x95007aff));

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xffb9daff));
    expect(getBackgroundColor(tester, 1), const Color(0xc7007aff));

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xfff7faff));
    expect(getBackgroundColor(tester, 1), const Color(0xf8007aff));

    await tester.pump(const Duration(milliseconds: 40));
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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
  });

  testWidgets('Animation is correct when widget is rebuilt', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('Child 1');
    children[1] = const Text('Child 2');
    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    await tester.tap(find.text('Child 2'));

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );
    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
      const Duration(milliseconds: 40),
    );
    expect(getBackgroundColor(tester, 0), const Color(0xff3d9aff));
    expect(getBackgroundColor(tester, 1), const Color(0x64007aff));

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
      const Duration(milliseconds: 40),
    );
    expect(getBackgroundColor(tester, 0), const Color(0xff7bbaff));
    expect(getBackgroundColor(tester, 1), const Color(0x95007aff));

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
      const Duration(milliseconds: 40),
    );
    expect(getBackgroundColor(tester, 0), const Color(0xffb9daff));
    expect(getBackgroundColor(tester, 1), const Color(0xc7007aff));

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
      const Duration(milliseconds: 40),
    );
    expect(getBackgroundColor(tester, 0), const Color(0xfff7faff));
    expect(getBackgroundColor(tester, 1), const Color(0xf8007aff));

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
      const Duration(milliseconds: 40),
    );
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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
  });

  testWidgets('Multiple segments are pressed', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('A');
    children[1] = const Text('B');
    children[2] = const Text('C');
    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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    await tester.startGesture(tester.getCenter(find.text('B')));
    await tester.pumpAndSettle(const Duration(milliseconds: 200));

    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));
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    expect(getBackgroundColor(tester, 2), isSameColorAs(CupertinoColors.white));
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    await tester.startGesture(tester.getCenter(find.text('C')));
    await tester.pumpAndSettle(const Duration(milliseconds: 200));

    // Press on C has no effect while B is held down.
    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));
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    expect(getBackgroundColor(tester, 2), isSameColorAs(CupertinoColors.white));
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  });

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  testWidgets('Transition is triggered while a transition is already occurring', (WidgetTester tester) async {
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    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('A');
    children[1] = const Text('B');
    children[2] = const Text('C');
    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    await tester.tap(find.text('B'));

    await tester.pump();
    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xff3d9aff));
    expect(getBackgroundColor(tester, 1), const Color(0x64007aff));

    // While A to B transition is occurring, press on C.
    await tester.tap(find.text('C'));

    await tester.pump();

    // A and B are now both transitioning to white.
    expect(getBackgroundColor(tester, 0), const Color(0xff3d9aff));
    expect(getBackgroundColor(tester, 1), const Color(0xffc1deff));
    expect(getBackgroundColor(tester, 2), const Color(0x33007aff));

    await tester.pump(const Duration(milliseconds: 40));
    // B background color has reached unselected state.
    expect(getBackgroundColor(tester, 0), const Color(0xff7bbaff));
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 2), const Color(0x64007aff));

    await tester.pump(const Duration(milliseconds: 100));
    // A background color has reached unselected state.
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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 2), const Color(0xe0007aff));

    await tester.pump(const Duration(milliseconds: 40));
    // C background color has reached selected state.
    expect(getBackgroundColor(tester, 2), CupertinoColors.activeBlue);
  });

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  testWidgets('Segment is selected while it is transitioning to unselected state', (WidgetTester tester) async {
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    await tester.pumpWidget(setupSimpleSegmentedControl());

    await tester.tap(find.text('Child 2'));

    await tester.pump();
    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xff3d9aff));
    expect(getBackgroundColor(tester, 1), const Color(0x64007aff));

    // While A to B transition is occurring, press on A again.
    await tester.tap(find.text('Child 1'));

    await tester.pump();

    // Both transitions start to reverse.
    expect(getBackgroundColor(tester, 0), const Color(0xcd007aff));
    expect(getBackgroundColor(tester, 1), const Color(0xffc1deff));

    await tester.pump(const Duration(milliseconds: 40));
    // A and B finish transitioning.
    expect(getBackgroundColor(tester, 0), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
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  });

  testWidgets('Add segment while animation is running', (WidgetTester tester) async {
    Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('A');
    children[1] = const Text('B');
    children[2] = const Text('C');
    int sharedValue = 0;

    await tester.pumpWidget(
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      StatefulBuilder(
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        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
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            child: CupertinoSegmentedControl<int>(
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              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
                if (sharedValue == 1) {
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                  children = Map<int, Widget>.from(children);
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                  children[3] = const Text('D');
                }
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    await tester.tap(find.text('B'));

    await tester.pump();
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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 3), isSameColorAs(CupertinoColors.white));
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    await tester.pump(const Duration(milliseconds: 40));
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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 3), isSameColorAs(CupertinoColors.white));
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    await tester.pump(const Duration(milliseconds: 150));
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    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
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    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
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    expect(getBackgroundColor(tester, 3), isSameColorAs(CupertinoColors.white));
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  });

  testWidgets('Remove segment while animation is running', (WidgetTester tester) async {
    Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('A');
    children[1] = const Text('B');
    children[2] = const Text('C');
    int sharedValue = 0;

    await tester.pumpWidget(
1343
      StatefulBuilder(
1344 1345
        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
1346
            child: CupertinoSegmentedControl<int>(
1347 1348 1349 1350 1351 1352 1353 1354
              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
                if (sharedValue == 1) {
                  children.remove(2);
1355
                  children = Map<int, Widget>.from(children);
1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
                }
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    expect(getRenderSegmentedControl(tester).getChildrenAsList().length, 3);

    await tester.tap(find.text('B'));

    await tester.pump();
    expect(getBackgroundColor(tester, 1), const Color(0x33007aff));
    expect(getRenderSegmentedControl(tester).getChildrenAsList().length, 2);

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 1), const Color(0x64007aff));

    await tester.pump(const Duration(milliseconds: 150));
    expect(getBackgroundColor(tester, 1), CupertinoColors.activeBlue);
  });

  testWidgets('Remove currently animating segment', (WidgetTester tester) async {
    Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('A');
    children[1] = const Text('B');
    children[2] = const Text('C');
1385
    int? sharedValue = 0;
1386 1387

    await tester.pumpWidget(
1388
      StatefulBuilder(
1389 1390
        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
1391
            child: CupertinoSegmentedControl<int>(
1392 1393 1394 1395 1396 1397 1398 1399
              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() {
                  sharedValue = newValue;
                });
                if (sharedValue == 1) {
                  children.remove(1);
1400
                  children = Map<int, Widget>.from(children);
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                  sharedValue = null;
                }
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    expect(getRenderSegmentedControl(tester).getChildrenAsList().length, 3);

    await tester.tap(find.text('B'));

    await tester.pump();
    expect(getRenderSegmentedControl(tester).getChildrenAsList().length, 2);

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xff3d9aff));
1420
    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
1421 1422 1423

    await tester.pump(const Duration(milliseconds: 40));
    expect(getBackgroundColor(tester, 0), const Color(0xff7bbaff));
1424
    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
1425 1426

    await tester.pump(const Duration(milliseconds: 100));
1427 1428
    expect(getBackgroundColor(tester, 0), isSameColorAs(CupertinoColors.white));
    expect(getBackgroundColor(tester, 1), isSameColorAs(CupertinoColors.white));
1429 1430
  });

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  // Regression test: https://github.com/flutter/flutter/issues/43414.
  testWidgets("Quick double tap doesn't break the internal state", (WidgetTester tester) async {
    const Map<int, Widget> children = <int, Widget>{
      0: Text('A'),
      1: Text('B'),
      2: Text('C'),
    };
    int sharedValue = 0;

    await tester.pumpWidget(
      StatefulBuilder(
        builder: (BuildContext context, StateSetter setState) {
          return boilerplate(
            child: CupertinoSegmentedControl<int>(
              key: const ValueKey<String>('Segmented Control'),
              children: children,
              onValueChanged: (int newValue) {
                setState(() { sharedValue = newValue; });
              },
              groupValue: sharedValue,
            ),
          );
        },
      ),
    );

    await tester.tap(find.text('B'));
    // sharedValue has been updated but widget.groupValue is not.
    expect(sharedValue, 1);

    // Land the second tap before the widget gets a chance to rebuild.
    final TestGesture secondTap = await tester.startGesture(tester.getCenter(find.text('B')));
    await tester.pump();

    await secondTap.up();
    expect(sharedValue, 1);

    await tester.tap(find.text('C'));
    expect(sharedValue, 2);
  });

1472 1473
  testWidgets('Golden Test Placeholder Widget', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
1474
    children[0] = Container();
1475
    children[1] = const Placeholder();
1476
    children[2] = Container();
1477 1478 1479 1480

    const int currentValue = 0;

    await tester.pumpWidget(
1481 1482
      RepaintBoundary(
        child: StatefulBuilder(
1483 1484
          builder: (BuildContext context, StateSetter setState) {
            return boilerplate(
1485
              child: SizedBox(
1486
                width: 800.0,
1487
                child: CupertinoSegmentedControl<int>(
1488 1489
                  key: const ValueKey<String>('Segmented Control'),
                  children: children,
1490
                  onValueChanged: (int newValue) { },
1491 1492
                  groupValue: currentValue,
                ),
1493 1494 1495 1496 1497 1498 1499
              ),
            );
          },
        ),
      ),
    );

1500 1501
    await expectLater(
      find.byType(RepaintBoundary),
1502
      matchesGoldenFile('segmented_control_test.0.png'),
1503
    );
1504
  });
1505 1506 1507 1508 1509 1510 1511 1512 1513 1514

  testWidgets('Golden Test Pressed State', (WidgetTester tester) async {
    final Map<int, Widget> children = <int, Widget>{};
    children[0] = const Text('A');
    children[1] = const Text('B');
    children[2] = const Text('C');

    const int currentValue = 0;

    await tester.pumpWidget(
1515 1516
      RepaintBoundary(
        child: StatefulBuilder(
1517 1518
          builder: (BuildContext context, StateSetter setState) {
            return boilerplate(
1519
              child: SizedBox(
1520
                width: 800.0,
1521
                child: CupertinoSegmentedControl<int>(
1522 1523
                  key: const ValueKey<String>('Segmented Control'),
                  children: children,
1524
                  onValueChanged: (int newValue) { },
1525 1526
                  groupValue: currentValue,
                ),
1527 1528 1529 1530 1531 1532 1533 1534 1535 1536
              ),
            );
          },
        ),
      ),
    );

    final Offset center = tester.getCenter(find.text('B'));
    await tester.startGesture(center);
    await tester.pumpAndSettle();
1537

1538 1539
    await expectLater(
      find.byType(RepaintBoundary),
1540
      matchesGoldenFile('segmented_control_test.1.png'),
1541
    );
1542
  });
1543
}