flutter/packages/flutter/test/material/bottom_sheet_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/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';

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

  test('BottomSheetThemeData null fields by default', () {
    const BottomSheetThemeData bottomSheetTheme = BottomSheetThemeData();
    expect(bottomSheetTheme.backgroundColor, null);
    expect(bottomSheetTheme.elevation, null);
    expect(bottomSheetTheme.shape, null);
    expect(bottomSheetTheme.clipBehavior, null);
    expect(bottomSheetTheme.constraints, null);
  });

  testWidgets('Default BottomSheetThemeData debugFillProperties', (WidgetTester tester) async {
    final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
    const BottomSheetThemeData().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('BottomSheetThemeData implements debugFillProperties', (WidgetTester tester) async {
    final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
    const BottomSheetThemeData(
      backgroundColor: Color(0xFFFFFFFF),
      elevation: 2.0,
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(2.0))),
      clipBehavior: Clip.antiAlias,
      constraints: BoxConstraints(minWidth: 200, maxWidth: 640),
    ).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(0xffffffff)',
      'elevation: 2.0',
      'shape: RoundedRectangleBorder(BorderSide(Color(0xff000000), 0.0, BorderStyle.none), BorderRadius.circular(2.0))',
      'clipBehavior: Clip.antiAlias',
      'constraints: BoxConstraints(200.0<=w<=640.0, 0.0<=h<=Infinity)',
    ]);
  });

  testWidgets('Passing no BottomSheetThemeData returns defaults', (WidgetTester tester) async {
    await tester.pumpWidget(MaterialApp(
      home: Scaffold(
        body: BottomSheet(
          onClosing: () {},
          builder: (BuildContext context) {
            return Container();
          },
        ),
      ),
    ));

    final Material material = tester.widget<Material>(
      find.descendant(
        of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(material.color, null);
    expect(material.elevation, 0.0);
    expect(material.shape, null);
    expect(material.clipBehavior, Clip.none);
  });

  testWidgets('BottomSheet uses values from BottomSheetThemeData', (WidgetTester tester) async {
    final BottomSheetThemeData bottomSheetTheme = _bottomSheetTheme();

    await tester.pumpWidget(MaterialApp(
      theme: ThemeData(bottomSheetTheme: bottomSheetTheme),
      home: Scaffold(
        body: BottomSheet(
          onClosing: () {},
          builder: (BuildContext context) {
            return Container();
          },
        ),
      ),
    ));

    final Material material = tester.widget<Material>(
      find.descendant(
        of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(material.color, bottomSheetTheme.backgroundColor);
    expect(material.elevation, bottomSheetTheme.elevation);
    expect(material.shape, bottomSheetTheme.shape);
    expect(material.clipBehavior, bottomSheetTheme.clipBehavior);
  });

  testWidgets('BottomSheet widget properties take priority over theme', (WidgetTester tester) async {
    const Color backgroundColor = Colors.purple;
    const double elevation = 7.0;
    const ShapeBorder shape = RoundedRectangleBorder(
      borderRadius: BorderRadius.all(Radius.circular(9.0)),
    );
    const Clip clipBehavior = Clip.hardEdge;

    await tester.pumpWidget(MaterialApp(
      theme: ThemeData(bottomSheetTheme: _bottomSheetTheme()),
      home: Scaffold(
        body: BottomSheet(
          backgroundColor: backgroundColor,
          elevation: elevation,
          shape: shape,
          clipBehavior: Clip.hardEdge,
          onClosing: () {},
          builder: (BuildContext context) {
            return Container();
          },
        ),
      ),
    ));

    final Material material = tester.widget<Material>(
      find.descendant(
        of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(material.color, backgroundColor);
    expect(material.elevation, elevation);
    expect(material.shape, shape);
    expect(material.clipBehavior, clipBehavior);
  });

  testWidgets('Modal bottom sheet-specific parameters are used for modal bottom sheets', (WidgetTester tester) async {
    const double modalElevation = 5.0;
    const double persistentElevation = 7.0;
    const Color modalBackgroundColor = Colors.yellow;
    const Color persistentBackgroundColor = Colors.red;
    const BottomSheetThemeData bottomSheetTheme = BottomSheetThemeData(
      elevation: persistentElevation,
      modalElevation: modalElevation,
      backgroundColor: persistentBackgroundColor,
      modalBackgroundColor: modalBackgroundColor,
    );

    await tester.pumpWidget(bottomSheetWithElevations(bottomSheetTheme));
    await tester.tap(find.text('Show Modal'));
    await tester.pumpAndSettle();

    final Material material = tester.widget<Material>(
      find.descendant(
        of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(material.elevation, modalElevation);
    expect(material.color, modalBackgroundColor);
  });

  testWidgets('General bottom sheet parameters take priority over modal bottom sheet-specific parameters for persistent bottom sheets', (WidgetTester tester) async {
    const double modalElevation = 5.0;
    const double persistentElevation = 7.0;
    const Color modalBackgroundColor = Colors.yellow;
    const Color persistentBackgroundColor = Colors.red;
    const BottomSheetThemeData bottomSheetTheme = BottomSheetThemeData(
      elevation: persistentElevation,
      modalElevation: modalElevation,
      backgroundColor: persistentBackgroundColor,
      modalBackgroundColor: modalBackgroundColor,
    );

    await tester.pumpWidget(bottomSheetWithElevations(bottomSheetTheme));
    await tester.tap(find.text('Show Persistent'));
    await tester.pumpAndSettle();

    final Material material = tester.widget<Material>(
      find.descendant(
        of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(material.elevation, persistentElevation);
    expect(material.color, persistentBackgroundColor);
  });

  testWidgets("Modal bottom sheet-specific parameters don't apply to persistent bottom sheets", (WidgetTester tester) async {
    const double modalElevation = 5.0;
    const Color modalBackgroundColor = Colors.yellow;
    const BottomSheetThemeData bottomSheetTheme = BottomSheetThemeData(
      modalElevation: modalElevation,
      modalBackgroundColor: modalBackgroundColor,
    );

    await tester.pumpWidget(bottomSheetWithElevations(bottomSheetTheme));
    await tester.tap(find.text('Show Persistent'));
    await tester.pumpAndSettle();

    final Material material = tester.widget<Material>(
      find.descendant(
        of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(material.elevation, 0);
    expect(material.color, null);
  });

  testWidgets('Modal bottom sheets respond to theme changes', (WidgetTester tester) async {
    const double lightElevation = 5.0;
    const double darkElevation = 3.0;
    const Color lightBackgroundColor = Colors.green;
    const Color darkBackgroundColor = Colors.grey;

    await tester.pumpWidget(MaterialApp(
      theme: ThemeData.light().copyWith(
        bottomSheetTheme: const BottomSheetThemeData(
          elevation: lightElevation,
          backgroundColor: lightBackgroundColor,
        ),
      ),
      darkTheme: ThemeData.dark().copyWith(
        bottomSheetTheme: const BottomSheetThemeData(
          elevation: darkElevation,
          backgroundColor: darkBackgroundColor,
        ),
      ),
      home: Scaffold(
        body: Builder(
          builder: (BuildContext context) {
            return Column(
              children: <Widget>[
                RawMaterialButton(
                  child: const Text('Show Modal'),
                  onPressed: () {
                    showModalBottomSheet<void>(
                      context: context,
                      builder: (BuildContext context) {
                        return const Text('This is a modal bottom sheet.');
                      },
                    );
                  },
                ),
              ],
            );
          },
        ),
      ),
    ));
    await tester.tap(find.text('Show Modal'));
    await tester.pumpAndSettle();

    final Material lightMaterial = tester.widget<Material>(
      find.descendant(
        of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(lightMaterial.elevation, lightElevation);
    expect(lightMaterial.color, lightBackgroundColor);

    // Simulate the user changing to dark theme
    tester.binding.platformDispatcher.platformBrightnessTestValue = Brightness.dark;
    await tester.pumpAndSettle();

    final Material darkMaterial = tester.widget<Material>(
    find.descendant(
      of: find.byType(BottomSheet),
        matching: find.byType(Material),
      ),
    );
    expect(darkMaterial.elevation, darkElevation);
    expect(darkMaterial.color, darkBackgroundColor);
  });
}

Widget bottomSheetWithElevations(BottomSheetThemeData bottomSheetTheme) {
  return MaterialApp(
    theme: ThemeData(bottomSheetTheme: bottomSheetTheme),
    home: Scaffold(
      body: Builder(
        builder: (BuildContext context) {
          return Column(
              children: <Widget>[
                RawMaterialButton(
                  child: const Text('Show Modal'),
                  onPressed: () {
                    showModalBottomSheet<void>(
                      context: context,
                      builder: (BuildContext _) {
                        return const Text(
                          'This is a modal bottom sheet.',
                        );
                      },
                    );
                  },
                ),
                RawMaterialButton(
                  child: const Text('Show Persistent'),
                  onPressed: () {
                    showBottomSheet<void>(
                      context: context,
                      builder: (BuildContext _) {
                        return const Text(
                          'This is a persistent bottom sheet.',
                        );
                      },
                    );
                  },
                ),
              ],
          );
        },
      ),
    ),
  );
}

BottomSheetThemeData _bottomSheetTheme() {
  return const BottomSheetThemeData(
    backgroundColor: Colors.orange,
    elevation: 12.0,
    shape: BeveledRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(12))),
    clipBehavior: Clip.antiAlias,
  );
}