chip_theme_test.dart

// 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 '../rendering/mock_canvas.dart';

RenderBox getMaterialBox(WidgetTester tester) {
  return tester.firstRenderObject<RenderBox>(
    find.descendant(
      of: find.byType(RawChip),
      matching: find.byType(CustomPaint),
    ),
  );
}

Material getMaterial(WidgetTester tester) {
  return tester.widget<Material>(
    find.descendant(
      of: find.byType(RawChip),
      matching: find.byType(Material),
    ),
  );
}

DefaultTextStyle getLabelStyle(WidgetTester tester) {
  return tester.widget(
    find.descendant(
      of: find.byType(RawChip),
      matching: find.byType(DefaultTextStyle),
    ).last,
  );
}

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

  test('ChipThemeData defaults', () {
    const ChipThemeData themeData = ChipThemeData();
    expect(themeData.backgroundColor, null);
    expect(themeData.deleteIconColor, null);
    expect(themeData.disabledColor, null);
    expect(themeData.selectedColor, null);
    expect(themeData.secondarySelectedColor, null);
    expect(themeData.shadowColor, null);
    expect(themeData.surfaceTintColor, null);
    expect(themeData.selectedShadowColor, null);
    expect(themeData.showCheckmark, null);
    expect(themeData.checkmarkColor, null);
    expect(themeData.labelPadding, null);
    expect(themeData.padding, null);
    expect(themeData.side, null);
    expect(themeData.shape, null);
    expect(themeData.labelStyle, null);
    expect(themeData.secondaryLabelStyle, null);
    expect(themeData.brightness, null);
    expect(themeData.elevation, null);
    expect(themeData.pressElevation, null);
  });

  testWidgets('Default ChipThemeData debugFillProperties', (WidgetTester tester) async {
    final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
    const ChipThemeData().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('ChipThemeData implements debugFillProperties', (WidgetTester tester) async {
    final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
    const ChipThemeData(
      backgroundColor: Color(0xfffffff0),
      deleteIconColor: Color(0xfffffff1),
      disabledColor: Color(0xfffffff2),
      selectedColor: Color(0xfffffff3),
      secondarySelectedColor: Color(0xfffffff4),
      shadowColor: Color(0xfffffff5),
      surfaceTintColor: Color(0xfffffff8),
      selectedShadowColor: Color(0xfffffff6),
      showCheckmark: true,
      checkmarkColor: Color(0xfffffff7),
      labelPadding: EdgeInsets.all(1),
      padding: EdgeInsets.all(2),
      side: BorderSide(width: 10),
      shape: RoundedRectangleBorder(),
      labelStyle: TextStyle(fontSize: 10),
      secondaryLabelStyle: TextStyle(fontSize: 20),
      brightness: Brightness.dark,
      elevation: 5,
      pressElevation: 6,
    ).debugFillProperties(builder);

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

    expect(description, <String>[
      'backgroundColor: Color(0xfffffff0)',
      'deleteIconColor: Color(0xfffffff1)',
      'disabledColor: Color(0xfffffff2)',
      'selectedColor: Color(0xfffffff3)',
      'secondarySelectedColor: Color(0xfffffff4)',
      'shadowColor: Color(0xfffffff5)',
      'surfaceTintColor: Color(0xfffffff8)',
      'selectedShadowColor: Color(0xfffffff6)',
      'showCheckmark: true',
      'checkMarkColor: Color(0xfffffff7)',
      'labelPadding: EdgeInsets.all(1.0)',
      'padding: EdgeInsets.all(2.0)',
      'side: BorderSide(Color(0xff000000), 10.0, BorderStyle.solid)',
      'shape: RoundedRectangleBorder(BorderSide(Color(0xff000000), 0.0, BorderStyle.none), BorderRadius.zero)',
      'labelStyle: TextStyle(inherit: true, size: 10.0)',
      'secondaryLabelStyle: TextStyle(inherit: true, size: 20.0)',
      'brightness: dark',
      'elevation: 5.0',
      'pressElevation: 6.0',
    ]);
  });

  testWidgets('Chip uses ThemeData chip theme', (WidgetTester tester) async {
    const ChipThemeData chipTheme = ChipThemeData(
      backgroundColor: Color(0xff112233),
      elevation: 4,
      padding: EdgeInsets.all(50),
      labelPadding: EdgeInsets.all(25),
      shape: RoundedRectangleBorder(),
      labelStyle: TextStyle(fontSize: 32),
    );

    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData.light().copyWith(
          chipTheme: chipTheme,
        ),
        home: Directionality(
          textDirection: TextDirection.ltr,
          child: Material(
            child: Center(
              child: RawChip(
                label: const SizedBox(width: 100, height: 100),
                onSelected: (bool newValue) { },
              ),
            ),
          ),
        ),
      ),
    );

    final RenderBox materialBox = getMaterialBox(tester);
    expect(materialBox, paints..path(color: chipTheme.backgroundColor));
    expect(getMaterial(tester).elevation, chipTheme.elevation);
    expect(tester.getSize(find.byType(RawChip)), const Size(250, 250)); // label + padding + labelPadding
    expect(getMaterial(tester).shape, chipTheme.shape);
    expect(getLabelStyle(tester).style.fontSize, 32);
  });

  testWidgets('Chip uses ChipTheme', (WidgetTester tester) async {
    const ChipThemeData chipTheme = ChipThemeData(
      backgroundColor: Color(0xff112233),
      elevation: 4,
      padding: EdgeInsets.all(50),
      labelPadding: EdgeInsets.all(25),
      labelStyle: TextStyle(fontSize: 32),
      shape: RoundedRectangleBorder(),
    );

    const ChipThemeData shadowedChipTheme = ChipThemeData(
      backgroundColor: Color(0xff332211),
      elevation: 3,
      padding: EdgeInsets.all(5),
      labelPadding: EdgeInsets.all(10),
      labelStyle: TextStyle(fontSize: 64),
      shape: CircleBorder(),
    );

    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData.light().copyWith(
          chipTheme: shadowedChipTheme,
        ),
        home: ChipTheme(
          data: chipTheme,
          child: Builder(
            builder: (BuildContext context) {
              return Directionality(
                textDirection: TextDirection.ltr,
                child: Material(
                  child: Center(
                    child: RawChip(
                      label: const SizedBox(width: 100, height: 100),
                      onSelected: (bool newValue) { },
                    ),
                  ),
                ),
              );
            },
          ),
        ),
      ),
    );

    final RenderBox materialBox = getMaterialBox(tester);
    expect(materialBox, paints..path(color: chipTheme.backgroundColor));
    expect(tester.getSize(find.byType(RawChip)), const Size(250, 250)); // label + padding + labelPadding
    expect(getMaterial(tester).elevation, chipTheme.elevation);
    expect(getMaterial(tester).shape, chipTheme.shape);
    expect(getLabelStyle(tester).style.fontSize, 32);
  });

  testWidgets('Chip uses constructor parameters', (WidgetTester tester) async {
    const ChipThemeData shadowedChipTheme = ChipThemeData(
      backgroundColor: Color(0xff112233),
      elevation: 4,
      padding: EdgeInsets.all(5),
      labelPadding: EdgeInsets.all(2),
      labelStyle: TextStyle(),
      shape: RoundedRectangleBorder(),
    );

    const Color backgroundColor = Color(0xff332211);
    const double elevation = 3;
    const double fontSize = 32;
    const OutlinedBorder shape = CircleBorder();

    await tester.pumpWidget(
      MaterialApp(
        home: ChipTheme(
          data: shadowedChipTheme,
          child: Builder(
            builder: (BuildContext context) {
              return Directionality(
                textDirection: TextDirection.ltr,
                child: Material(
                  child: Center(
                    child: RawChip(
                      backgroundColor: backgroundColor,
                      elevation: elevation,
                      padding: const EdgeInsets.all(50),
                      labelPadding:const EdgeInsets.all(25),
                      labelStyle: const TextStyle(fontSize: fontSize),
                      shape: shape,
                      label: const SizedBox(width: 100, height: 100),
                      onSelected: (bool newValue) { },
                    ),
                  ),
                ),
              );
            },
          ),
        ),
      ),
    );

    final RenderBox materialBox = getMaterialBox(tester);
    expect(materialBox, paints..path(color: backgroundColor));
    expect(tester.getSize(find.byType(RawChip)), const Size(250, 250)); // label + padding + labelPadding
    expect(getMaterial(tester).elevation, elevation);
    expect(getMaterial(tester).shape, shape);
    expect(getLabelStyle(tester).style.fontSize, 32);
  });

  testWidgets('ChipTheme.fromDefaults', (WidgetTester tester) async {
    const TextStyle labelStyle = TextStyle();
    ChipThemeData chipTheme = ChipThemeData.fromDefaults(
      brightness: Brightness.light,
      secondaryColor: Colors.red,
      labelStyle: labelStyle,
    );
    expect(chipTheme.backgroundColor, Colors.black.withAlpha(0x1f));
    expect(chipTheme.deleteIconColor, Colors.black.withAlpha(0xde));
    expect(chipTheme.disabledColor, Colors.black.withAlpha(0x0c));
    expect(chipTheme.selectedColor, Colors.black.withAlpha(0x3d));
    expect(chipTheme.secondarySelectedColor, Colors.red.withAlpha(0x3d));
    expect(chipTheme.shadowColor, Colors.black);
    expect(chipTheme.surfaceTintColor, null);
    expect(chipTheme.selectedShadowColor, Colors.black);
    expect(chipTheme.showCheckmark, true);
    expect(chipTheme.checkmarkColor, null);
    expect(chipTheme.labelPadding, null);
    expect(chipTheme.padding, const EdgeInsets.all(4.0));
    expect(chipTheme.side, null);
    expect(chipTheme.shape, null);
    expect(chipTheme.labelStyle, labelStyle.copyWith(color: Colors.black.withAlpha(0xde)));
    expect(chipTheme.secondaryLabelStyle, labelStyle.copyWith(color: Colors.red.withAlpha(0xde)));
    expect(chipTheme.brightness, Brightness.light);
    expect(chipTheme.elevation, 0.0);
    expect(chipTheme.pressElevation, 8.0);

    chipTheme = ChipThemeData.fromDefaults(
      brightness: Brightness.dark,
      secondaryColor: Colors.tealAccent[200]!,
      labelStyle: const TextStyle(),
    );
    expect(chipTheme.backgroundColor, Colors.white.withAlpha(0x1f));
    expect(chipTheme.deleteIconColor, Colors.white.withAlpha(0xde));
    expect(chipTheme.disabledColor, Colors.white.withAlpha(0x0c));
    expect(chipTheme.selectedColor, Colors.white.withAlpha(0x3d));
    expect(chipTheme.secondarySelectedColor, Colors.tealAccent[200]!.withAlpha(0x3d));
    expect(chipTheme.shadowColor, Colors.black);
    expect(chipTheme.selectedShadowColor, Colors.black);
    expect(chipTheme.showCheckmark, true);
    expect(chipTheme.checkmarkColor, null);
    expect(chipTheme.labelPadding, null);
    expect(chipTheme.padding, const EdgeInsets.all(4.0));
    expect(chipTheme.side, null);
    expect(chipTheme.shape, null);
    expect(chipTheme.labelStyle, labelStyle.copyWith(color: Colors.white.withAlpha(0xde)));
    expect(chipTheme.secondaryLabelStyle, labelStyle.copyWith(color: Colors.tealAccent[200]!.withAlpha(0xde)));
    expect(chipTheme.brightness, Brightness.dark);
    expect(chipTheme.elevation, 0.0);
    expect(chipTheme.pressElevation, 8.0);
  });


  testWidgets('ChipThemeData generates correct opacities for defaults', (WidgetTester tester) async {
    const Color customColor1 = Color(0xcafefeed);
    const Color customColor2 = Color(0xdeadbeef);
    final TextStyle customStyle = ThemeData.fallback().textTheme.bodyText1!.copyWith(color: customColor2);

    final ChipThemeData lightTheme = ChipThemeData.fromDefaults(
      secondaryColor: customColor1,
      brightness: Brightness.light,
      labelStyle: customStyle,
    );

    expect(lightTheme.backgroundColor, equals(Colors.black.withAlpha(0x1f)));
    expect(lightTheme.deleteIconColor, equals(Colors.black.withAlpha(0xde)));
    expect(lightTheme.disabledColor, equals(Colors.black.withAlpha(0x0c)));
    expect(lightTheme.selectedColor, equals(Colors.black.withAlpha(0x3d)));
    expect(lightTheme.secondarySelectedColor, equals(customColor1.withAlpha(0x3d)));
    expect(lightTheme.labelPadding, isNull);
    expect(lightTheme.padding, equals(const EdgeInsets.all(4.0)));
    expect(lightTheme.side, isNull);
    expect(lightTheme.shape, isNull);
    expect(lightTheme.labelStyle?.color, equals(Colors.black.withAlpha(0xde)));
    expect(lightTheme.secondaryLabelStyle?.color, equals(customColor1.withAlpha(0xde)));
    expect(lightTheme.brightness, equals(Brightness.light));

    final ChipThemeData darkTheme = ChipThemeData.fromDefaults(
      secondaryColor: customColor1,
      brightness: Brightness.dark,
      labelStyle: customStyle,
    );

    expect(darkTheme.backgroundColor, equals(Colors.white.withAlpha(0x1f)));
    expect(darkTheme.deleteIconColor, equals(Colors.white.withAlpha(0xde)));
    expect(darkTheme.disabledColor, equals(Colors.white.withAlpha(0x0c)));
    expect(darkTheme.selectedColor, equals(Colors.white.withAlpha(0x3d)));
    expect(darkTheme.secondarySelectedColor, equals(customColor1.withAlpha(0x3d)));
    expect(darkTheme.labelPadding, isNull);
    expect(darkTheme.padding, equals(const EdgeInsets.all(4.0)));
    expect(darkTheme.side, isNull);
    expect(darkTheme.shape, isNull);
    expect(darkTheme.labelStyle?.color, equals(Colors.white.withAlpha(0xde)));
    expect(darkTheme.secondaryLabelStyle?.color, equals(customColor1.withAlpha(0xde)));
    expect(darkTheme.brightness, equals(Brightness.dark));

    final ChipThemeData customTheme = ChipThemeData.fromDefaults(
      primaryColor: customColor1,
      secondaryColor: customColor2,
      labelStyle: customStyle,
    );

    //expect(customTheme.backgroundColor, equals(customColor1.withAlpha(0x1f)));
    expect(customTheme.deleteIconColor, equals(customColor1.withAlpha(0xde)));
    expect(customTheme.disabledColor, equals(customColor1.withAlpha(0x0c)));
    expect(customTheme.selectedColor, equals(customColor1.withAlpha(0x3d)));
    expect(customTheme.secondarySelectedColor, equals(customColor2.withAlpha(0x3d)));
    expect(customTheme.labelPadding, isNull);
    expect(customTheme.padding, equals(const EdgeInsets.all(4.0)));
    expect(customTheme.side, isNull);
    expect(customTheme.shape, isNull);
    expect(customTheme.labelStyle?.color, equals(customColor1.withAlpha(0xde)));
    expect(customTheme.secondaryLabelStyle?.color, equals(customColor2.withAlpha(0xde)));
    expect(customTheme.brightness, equals(Brightness.light));
  });

  testWidgets('ChipThemeData lerps correctly', (WidgetTester tester) async {
    final ChipThemeData chipThemeBlack = ChipThemeData.fromDefaults(
      secondaryColor: Colors.black,
      brightness: Brightness.dark,
      labelStyle: ThemeData.fallback().textTheme.bodyText1!.copyWith(color: Colors.black),
    ).copyWith(
      elevation: 1.0,
      labelPadding: const EdgeInsets.symmetric(horizontal: 8.0),
      shape: const StadiumBorder(),
      side: const BorderSide(),
      pressElevation: 4.0,
      shadowColor: Colors.black,
      surfaceTintColor: Colors.black,
      selectedShadowColor: Colors.black,
      showCheckmark: false,
      checkmarkColor: Colors.black,
    );
    final ChipThemeData chipThemeWhite = ChipThemeData.fromDefaults(
      secondaryColor: Colors.white,
      brightness: Brightness.light,
      labelStyle: ThemeData.fallback().textTheme.bodyText1!.copyWith(color: Colors.white),
    ).copyWith(
      padding: const EdgeInsets.all(2.0),
      labelPadding: const EdgeInsets.only(top: 8.0, bottom: 8.0),
      shape: const BeveledRectangleBorder(),
      side: const BorderSide(color: Colors.white),
      elevation: 5.0,
      pressElevation: 10.0,
      shadowColor: Colors.white,
      surfaceTintColor: Colors.white,
      selectedShadowColor: Colors.white,
      showCheckmark: true,
      checkmarkColor: Colors.white,
    );

    final ChipThemeData lerp = ChipThemeData.lerp(chipThemeBlack, chipThemeWhite, 0.5)!;
    const Color middleGrey = Color(0xff7f7f7f);
    expect(lerp.backgroundColor, equals(middleGrey.withAlpha(0x1f)));
    expect(lerp.deleteIconColor, equals(middleGrey.withAlpha(0xde)));
    expect(lerp.disabledColor, equals(middleGrey.withAlpha(0x0c)));
    expect(lerp.selectedColor, equals(middleGrey.withAlpha(0x3d)));
    expect(lerp.secondarySelectedColor, equals(middleGrey.withAlpha(0x3d)));
    expect(lerp.shadowColor, equals(middleGrey));
    expect(lerp.surfaceTintColor, equals(middleGrey));
    expect(lerp.selectedShadowColor, equals(middleGrey));
    expect(lerp.showCheckmark, equals(true));
    expect(lerp.labelPadding, equals(const EdgeInsets.all(4.0)));
    expect(lerp.padding, equals(const EdgeInsets.all(3.0)));
    expect(lerp.side!.color, equals(middleGrey));
    expect(lerp.shape, isA<BeveledRectangleBorder>());
    expect(lerp.labelStyle?.color, equals(middleGrey.withAlpha(0xde)));
    expect(lerp.secondaryLabelStyle?.color, equals(middleGrey.withAlpha(0xde)));
    expect(lerp.brightness, equals(Brightness.light));
    expect(lerp.elevation, 3.0);
    expect(lerp.pressElevation, 7.0);
    expect(lerp.checkmarkColor, equals(middleGrey));

    expect(ChipThemeData.lerp(null, null, 0.25), isNull);

    final ChipThemeData lerpANull25 = ChipThemeData.lerp(null, chipThemeWhite, 0.25)!;
    expect(lerpANull25.backgroundColor, equals(Colors.black.withAlpha(0x08)));
    expect(lerpANull25.deleteIconColor, equals(Colors.black.withAlpha(0x38)));
    expect(lerpANull25.disabledColor, equals(Colors.black.withAlpha(0x03)));
    expect(lerpANull25.selectedColor, equals(Colors.black.withAlpha(0x0f)));
    expect(lerpANull25.secondarySelectedColor, equals(Colors.white.withAlpha(0x0f)));
    expect(lerpANull25.shadowColor, equals(Colors.white.withAlpha(0x40)));
    expect(lerpANull25.surfaceTintColor, equals(Colors.white.withAlpha(0x40)));
    expect(lerpANull25.selectedShadowColor, equals(Colors.white.withAlpha(0x40)));
    expect(lerpANull25.showCheckmark, equals(true));
    expect(lerpANull25.labelPadding, equals(const EdgeInsets.only(top: 2.0, bottom: 2.0)));
    expect(lerpANull25.padding, equals(const EdgeInsets.all(0.5)));
    expect(lerpANull25.side!.color, equals(Colors.white.withAlpha(0x3f)));
    expect(lerpANull25.shape, isA<BeveledRectangleBorder>());
    expect(lerpANull25.labelStyle?.color, equals(Colors.black.withAlpha(0x38)));
    expect(lerpANull25.secondaryLabelStyle?.color, equals(Colors.white.withAlpha(0x38)));
    expect(lerpANull25.brightness, equals(Brightness.light));
    expect(lerpANull25.elevation, 1.25);
    expect(lerpANull25.pressElevation, 2.5);
    expect(lerpANull25.checkmarkColor, equals(Colors.white.withAlpha(0x40)));

    final ChipThemeData lerpANull75 = ChipThemeData.lerp(null, chipThemeWhite, 0.75)!;
    expect(lerpANull75.backgroundColor, equals(Colors.black.withAlpha(0x17)));
    expect(lerpANull75.deleteIconColor, equals(Colors.black.withAlpha(0xa7)));
    expect(lerpANull75.disabledColor, equals(Colors.black.withAlpha(0x09)));
    expect(lerpANull75.selectedColor, equals(Colors.black.withAlpha(0x2e)));
    expect(lerpANull75.secondarySelectedColor, equals(Colors.white.withAlpha(0x2e)));
    expect(lerpANull75.shadowColor, equals(Colors.white.withAlpha(0xbf)));
    expect(lerpANull75.surfaceTintColor, equals(Colors.white.withAlpha(0xbf)));
    expect(lerpANull75.selectedShadowColor, equals(Colors.white.withAlpha(0xbf)));
    expect(lerpANull75.showCheckmark, equals(true));
    expect(lerpANull75.labelPadding, equals(const EdgeInsets.only(top: 6.0, bottom: 6.0)));
    expect(lerpANull75.padding, equals(const EdgeInsets.all(1.5)));
    expect(lerpANull75.side!.color, equals(Colors.white.withAlpha(0xbf)));
    expect(lerpANull75.shape, isA<BeveledRectangleBorder>());
    expect(lerpANull75.labelStyle?.color, equals(Colors.black.withAlpha(0xa7)));
    expect(lerpANull75.secondaryLabelStyle?.color, equals(Colors.white.withAlpha(0xa7)));
    expect(lerpANull75.brightness, equals(Brightness.light));
    expect(lerpANull75.elevation, 3.75);
    expect(lerpANull75.pressElevation, 7.5);
    expect(lerpANull75.checkmarkColor, equals(Colors.white.withAlpha(0xbf)));

    final ChipThemeData lerpBNull25 = ChipThemeData.lerp(chipThemeBlack, null, 0.25)!;
    expect(lerpBNull25.backgroundColor, equals(Colors.white.withAlpha(0x17)));
    expect(lerpBNull25.deleteIconColor, equals(Colors.white.withAlpha(0xa7)));
    expect(lerpBNull25.disabledColor, equals(Colors.white.withAlpha(0x09)));
    expect(lerpBNull25.selectedColor, equals(Colors.white.withAlpha(0x2e)));
    expect(lerpBNull25.secondarySelectedColor, equals(Colors.black.withAlpha(0x2e)));
    expect(lerpBNull25.shadowColor, equals(Colors.black.withAlpha(0xbf)));
    expect(lerpBNull25.surfaceTintColor, equals(Colors.black.withAlpha(0xbf)));
    expect(lerpBNull25.selectedShadowColor, equals(Colors.black.withAlpha(0xbf)));
    expect(lerpBNull25.showCheckmark, equals(false));
    expect(lerpBNull25.labelPadding, equals(const EdgeInsets.only(left: 6.0, right: 6.0)));
    expect(lerpBNull25.padding, equals(const EdgeInsets.all(3.0)));
    expect(lerpBNull25.side!.color, equals(Colors.black.withAlpha(0x3f)));
    expect(lerpBNull25.shape, isA<StadiumBorder>());
    expect(lerpBNull25.labelStyle?.color, equals(Colors.white.withAlpha(0xa7)));
    expect(lerpBNull25.secondaryLabelStyle?.color, equals(Colors.black.withAlpha(0xa7)));
    expect(lerpBNull25.brightness, equals(Brightness.dark));
    expect(lerpBNull25.elevation, 0.75);
    expect(lerpBNull25.pressElevation, 3.0);
    expect(lerpBNull25.checkmarkColor, equals(Colors.black.withAlpha(0xbf)));

    final ChipThemeData lerpBNull75 = ChipThemeData.lerp(chipThemeBlack, null, 0.75)!;
    expect(lerpBNull75.backgroundColor, equals(Colors.white.withAlpha(0x08)));
    expect(lerpBNull75.deleteIconColor, equals(Colors.white.withAlpha(0x38)));
    expect(lerpBNull75.disabledColor, equals(Colors.white.withAlpha(0x03)));
    expect(lerpBNull75.selectedColor, equals(Colors.white.withAlpha(0x0f)));
    expect(lerpBNull75.secondarySelectedColor, equals(Colors.black.withAlpha(0x0f)));
    expect(lerpBNull75.shadowColor, equals(Colors.black.withAlpha(0x40)));
    expect(lerpBNull75.surfaceTintColor, equals(Colors.black.withAlpha(0x40)));
    expect(lerpBNull75.selectedShadowColor, equals(Colors.black.withAlpha(0x40)));
    expect(lerpBNull75.showCheckmark, equals(true));
    expect(lerpBNull75.labelPadding, equals(const EdgeInsets.only(left: 2.0, right: 2.0)));
    expect(lerpBNull75.padding, equals(const EdgeInsets.all(1.0)));
    expect(lerpBNull75.side!.color, equals(Colors.black.withAlpha(0xbf)));
    expect(lerpBNull75.shape, isA<StadiumBorder>());
    expect(lerpBNull75.labelStyle?.color, equals(Colors.white.withAlpha(0x38)));
    expect(lerpBNull75.secondaryLabelStyle?.color, equals(Colors.black.withAlpha(0x38)));
    expect(lerpBNull75.brightness, equals(Brightness.light));
    expect(lerpBNull75.elevation, 0.25);
    expect(lerpBNull75.pressElevation, 1.0);
    expect(lerpBNull75.checkmarkColor, equals(Colors.black.withAlpha(0x40)));
  });

  testWidgets('Chip uses stateful color from chip theme', (WidgetTester tester) async {
    final FocusNode focusNode = FocusNode();

    const Color pressedColor = Color(0x00000001);
    const Color hoverColor = Color(0x00000002);
    const Color focusedColor = Color(0x00000003);
    const Color defaultColor = Color(0x00000004);
    const Color selectedColor = Color(0x00000005);
    const Color disabledColor = Color(0x00000006);

    Color getTextColor(Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return disabledColor;
      }

      if (states.contains(MaterialState.pressed)) {
        return pressedColor;
      }

      if (states.contains(MaterialState.hovered)) {
        return hoverColor;
      }

      if (states.contains(MaterialState.focused)) {
        return focusedColor;
      }

      if (states.contains(MaterialState.selected)) {
        return selectedColor;
      }

      return defaultColor;
    }

    final TextStyle labelStyle =  TextStyle(
      color: MaterialStateColor.resolveWith(getTextColor),
    );
    Widget chipWidget({ bool enabled = true, bool selected = false }) {
      return MaterialApp(
        theme: ThemeData(
          chipTheme: ThemeData.light().chipTheme.copyWith(
            labelStyle: labelStyle,
            secondaryLabelStyle: labelStyle,
          ),
        ),
        home: Scaffold(
          body: Focus(
            focusNode: focusNode,
            child: ChoiceChip(
              label: const Text('Chip'),
              selected: selected,
              onSelected: enabled ? (_) {} : null,
            ),
          ),
        ),
      );
    }
    Color textColor() {
      return tester.renderObject<RenderParagraph>(find.text('Chip')).text.style!.color!;
    }

    // Default, not disabled.
    await tester.pumpWidget(chipWidget());
    expect(textColor(), equals(defaultColor));

    // Selected.
    await tester.pumpWidget(chipWidget(selected: true));
    expect(textColor(), selectedColor);

    // Focused.
    final FocusNode chipFocusNode = focusNode.children.first;
    chipFocusNode.requestFocus();
    await tester.pumpAndSettle();
    expect(textColor(), focusedColor);

    // Hovered.
    final Offset center = tester.getCenter(find.byType(ChoiceChip));
    final TestGesture gesture = await tester.createGesture(
      kind: PointerDeviceKind.mouse,
    );
    await gesture.addPointer();
    await gesture.moveTo(center);
    await tester.pumpAndSettle();
    expect(textColor(), hoverColor);

    // Pressed.
    await gesture.down(center);
    await tester.pumpAndSettle();
    expect(textColor(), pressedColor);

    // Disabled.
    await tester.pumpWidget(chipWidget(enabled: false));
    await tester.pumpAndSettle();
    expect(textColor(), disabledColor);
  });

  testWidgets('Chip uses stateful border side from resolveWith pattern', (WidgetTester tester) async {
    const Color selectedColor = Color(0x00000001);
    const Color defaultColor = Color(0x00000002);

    BorderSide getBorderSide(Set<MaterialState> states) {
      Color color = defaultColor;

      if (states.contains(MaterialState.selected)) {
        color = selectedColor;
      }

      return BorderSide(color: color);
    }

    Widget chipWidget({ bool selected = false }) {
      return MaterialApp(
        theme: ThemeData(
          chipTheme: ThemeData.light().chipTheme.copyWith(
            side: MaterialStateBorderSide.resolveWith(getBorderSide),
          ),
        ),
        home: Scaffold(
          body: ChoiceChip(
            label: const Text('Chip'),
            selected: selected,
            onSelected: (_) {},
          ),
        ),
      );
    }

    // Default.
    await tester.pumpWidget(chipWidget());
    expect(find.byType(RawChip), paints..rrect(color: defaultColor));

    // Selected.
    await tester.pumpWidget(chipWidget(selected: true));
    expect(find.byType(RawChip), paints..rrect(color: selectedColor));
  });

  testWidgets('Chip uses stateful border side from chip theme', (WidgetTester tester) async {
    const Color selectedColor = Color(0x00000001);
    const Color defaultColor = Color(0x00000002);

    BorderSide getBorderSide(Set<MaterialState> states) {
      Color color = defaultColor;
      if (states.contains(MaterialState.selected)) {
        color = selectedColor;
      }
      return BorderSide(color: color);
    }

    final ChipThemeData chipTheme = ChipThemeData.fromDefaults(
      brightness: Brightness.light,
      secondaryColor: Colors.blue,
      labelStyle: const TextStyle(),
    ).copyWith(
      side: _MaterialStateBorderSide(getBorderSide),
    );

    Widget chipWidget({ bool selected = false }) {
      return MaterialApp(
        theme: ThemeData(chipTheme: chipTheme),
        home: Scaffold(
          body: ChoiceChip(
            label: const Text('Chip'),
            selected: selected,
            onSelected: (_) {},
          ),
        ),
      );
    }

    // Default.
    await tester.pumpWidget(chipWidget());
    expect(find.byType(RawChip), paints..rrect(color: defaultColor));

    // Selected.
    await tester.pumpWidget(chipWidget(selected: true));
    expect(find.byType(RawChip), paints..rrect(color: selectedColor));
  });

  testWidgets('Chip uses stateful shape from chip theme', (WidgetTester tester) async {
    OutlinedBorder? getShape(Set<MaterialState> states) {
      if (states.contains(MaterialState.selected)) {
        return const RoundedRectangleBorder();
      }

      return null;
    }

    final ChipThemeData chipTheme = ChipThemeData.fromDefaults(
      brightness: Brightness.light,
      secondaryColor: Colors.blue,
      labelStyle: const TextStyle(),
    ).copyWith(
      shape: _MaterialStateOutlinedBorder(getShape),
    );


    Widget chipWidget({ bool selected = false }) {
      return MaterialApp(
        theme: ThemeData(chipTheme: chipTheme),
        home: Scaffold(
          body: ChoiceChip(
            label: const Text('Chip'),
            selected: selected,
            onSelected: (_) {},
          ),
        ),
      );
    }

    // Default.
    await tester.pumpWidget(chipWidget());
    expect(getMaterial(tester).shape, isA<StadiumBorder>());

    // Selected.
    await tester.pumpWidget(chipWidget(selected: true));
    expect(getMaterial(tester).shape, isA<RoundedRectangleBorder>());
  });
}

class _MaterialStateOutlinedBorder extends StadiumBorder implements MaterialStateOutlinedBorder {
  const _MaterialStateOutlinedBorder(this.resolver);

  final MaterialPropertyResolver<OutlinedBorder?> resolver;

  @override
  OutlinedBorder? resolve(Set<MaterialState> states) => resolver(states);
}

class _MaterialStateBorderSide extends MaterialStateBorderSide {
  const _MaterialStateBorderSide(this.resolver);

  final MaterialPropertyResolver<BorderSide?> resolver;

  @override
  BorderSide? resolve(Set<MaterialState> states) => resolver(states);
}