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samples/material_3_demo/test/component_screen_test.dart

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// Copyright 2021 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// ignore_for_file: avoid_types_on_closure_parameters
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:material_3_demo/component_screen.dart';
import 'package:material_3_demo/main.dart';
void main() {
testWidgets('Default main page shows all M3 components', (tester) async {
widgetSetup(tester, 800, windowHeight: 7000);
await tester.pumpWidget(const App());
// Elements on the app bar
expect(find.text('Material 3'), findsOneWidget);
expect(
find.widgetWithIcon(AppBar, Icons.dark_mode_outlined), findsOneWidget);
expect(find.widgetWithIcon(AppBar, Icons.filter_2), findsOneWidget);
expect(find.widgetWithIcon(AppBar, Icons.palette_outlined), findsOneWidget);
// Elements on the component screen
// Common buttons
expect(find.widgetWithText(ElevatedButton, 'Elevated'), findsNWidgets(2));
expect(find.widgetWithText(FilledButton, 'Filled'), findsNWidgets(2));
expect(find.widgetWithText(FilledButton, 'Filled tonal'), findsNWidgets(2));
expect(find.widgetWithText(OutlinedButton, 'Outlined'), findsNWidgets(2));
expect(find.widgetWithText(TextButton, 'Text'), findsNWidgets(2));
expect(find.widgetWithText(Buttons, 'Icon'), findsNWidgets(5));
// FABs
expect(
find.byType(FloatingActionButton),
findsNWidgets(
6)); // 2 more show up in the bottom app bar. 1 more in the navigation rail
expect(find.widgetWithText(FloatingActionButton, 'Create'), findsOneWidget);
// Icon buttons
expect(find.widgetWithIcon(IconButton, Icons.settings_outlined),
findsNWidgets(8));
// Segmented buttons
expect(find.byType(SegmentedButton<Calendar>), findsOneWidget);
expect(find.byType(SegmentedButton<Sizes>), findsOneWidget);
// Badges
expect(find.byType(Badge), findsNWidgets(4));
// Progress indicators
Finder circularProgressIndicator = find.byType(CircularProgressIndicator);
expect(circularProgressIndicator, findsOneWidget);
Finder linearProgressIndicator = find.byType(LinearProgressIndicator);
expect(linearProgressIndicator, findsOneWidget);
// Snackbar
expect(find.widgetWithText(TextButton, 'Show snackbar'), findsOneWidget);
// Bottom sheet
expect(find.widgetWithText(TextButton, 'Show modal bottom sheet'),
findsOneWidget);
expect(
find.widgetWithText(TextButton, 'Show bottom sheet'), findsOneWidget);
// Cards
expect(find.widgetWithText(Cards, 'Elevated'), findsOneWidget);
expect(find.widgetWithText(Cards, 'Filled'), findsOneWidget);
expect(find.widgetWithText(Cards, 'Outlined'), findsOneWidget);
// Dialogs
expect(find.widgetWithText(TextButton, 'Show dialog'), findsOneWidget);
expect(find.widgetWithText(TextButton, 'Show full-screen dialog'),
findsOneWidget);
// Dividers
expect(find.byKey(const Key('divider')), findsOneWidget);
// Bottom app bar
expect(find.byType(BottomAppBar), findsOneWidget);
// Navigation bar
// Third one is off screen in the scaffold
expect(find.byType(NavigationBar), findsNWidgets(3));
// Navigation drawer
expect(find.byType(Drawer), findsOneWidget);
expect(find.widgetWithText(TextButton, 'Show modal navigation drawer'),
findsOneWidget);
// Navigation rail
// Second one is off screen in the scaffold
expect(find.byType(NavigationRail), findsNWidgets(2));
// Tabs
expect(find.byType(TabBar), findsOneWidget);
// Search
expect(find.byType(SearchBar), findsOneWidget);
// Top app bars
expect(find.byType(AppBar), findsNWidgets(6));
// Checkboxes
Finder checkboxExample = find.byType(CheckboxListTile);
expect(checkboxExample, findsNWidgets(4));
// Chips
expect(find.byType(ActionChip),
findsNWidgets(4)); // includes Assist and Suggestion chip.
expect(find.byType(FilterChip), findsNWidgets(2));
expect(find.byType(InputChip), findsNWidgets(2));
// Date and time pickers
expect(find.widgetWithText(DatePicker, 'Show date picker'), findsOneWidget);
expect(find.widgetWithText(TimePicker, 'Show time picker'), findsOneWidget);
// Menus
expect(find.byType(MenuAnchor), findsNWidgets(5));
expect(find.byType(DropdownMenu<ColorLabel>), findsOneWidget);
expect(find.byType(DropdownMenu<IconLabel>), findsOneWidget);
// Radios
Finder radioExample = find.byType(RadioListTile<Options>);
expect(radioExample, findsNWidgets(3));
// Sliders
expect(find.byType(Slider), findsNWidgets(2));
// Switches
expect(find.byType(Switch), findsNWidgets(4));
// TextFields
expect(find.widgetWithText(TextField, 'Disabled'), findsNWidgets(2));
expect(find.widgetWithText(TextField, 'Filled'), findsNWidgets(2));
expect(find.widgetWithText(TextField, 'Outlined'), findsNWidgets(2));
});
testWidgets(
'NavigationRail doesn\'t show when width value is small than 1000 '
'(in Portrait mode or narrow screen)', (tester) async {
widgetSetup(tester, 999, windowHeight: 7000);
await tester.pumpWidget(const App());
await tester.pumpAndSettle();
// When screen width is less than 1000, NavigationBar will show. At the same
// time, the NavigationBar example still show up in the navigation group.
expect(find.byType(NavigationBars),
findsNWidgets(3)); // The real navBar, badges example and navBar example
expect(find.widgetWithText(NavigationBar, 'Components'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Color'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Typography'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Elevation'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Explore'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Pets'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Account'), findsOneWidget);
});
testWidgets(
'NavigationRail shows when width value is greater than or equal '
'to 1000 (in Landscape mode or wider screen)', (tester) async {
widgetSetup(tester, 1001, windowHeight: 3000);
await tester.pumpWidget(const App());
await tester.pumpAndSettle();
// When screen width is greater than or equal to 1000, NavigationRail will show.
// At the same time, the NavigationBar will NOT show.
expect(find.byType(NavigationRail), findsNWidgets(2));
expect(find.byType(Tooltip, skipOffstage: false), findsWidgets);
expect(find.widgetWithText(NavigationRail, 'Components'), findsOneWidget);
expect(find.widgetWithText(NavigationRail, 'Color'), findsOneWidget);
expect(find.widgetWithText(NavigationRail, 'Typography'), findsOneWidget);
expect(find.widgetWithText(NavigationRail, 'Elevation'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Explore'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Pets'), findsOneWidget);
expect(find.widgetWithText(NavigationBar, 'Account'), findsOneWidget);
// the Navigation bar should be out of screen.
final RenderBox box =
tester.renderObject(find.widgetWithText(NavigationBar, 'Components'));
expect(box.localToGlobal(Offset.zero), const Offset(0.0, 3080.0));
});
testWidgets(
'Material version switches between Material3 and Material2 when'
'the version icon is clicked', (tester) async {
widgetSetup(tester, 450, windowHeight: 7000);
await tester.pumpWidget(const App());
BuildContext defaultElevatedButton =
tester.firstElement(find.byType(ElevatedButton));
BuildContext defaultIconButton =
tester.firstElement(find.byType(IconButton));
BuildContext defaultFAB =
tester.firstElement(find.byType(FloatingActionButton));
BuildContext defaultCard =
tester.firstElement(find.widgetWithText(Card, 'Elevated'));
BuildContext defaultChip =
tester.firstElement(find.widgetWithText(ActionChip, 'Assist'));
Finder dialog = find.text('Show dialog');
await tester.tap(dialog);
await tester.pumpAndSettle(const Duration(microseconds: 500));
BuildContext defaultAlertDialog = tester.element(find.byType(AlertDialog));
expect(Theme.of(defaultAlertDialog).useMaterial3, true);
Finder dismiss = find.text('Okay');
await tester.tap(dismiss);
await tester.pumpAndSettle(const Duration(microseconds: 500));
expect(find.widgetWithIcon(AppBar, Icons.filter_2), findsOneWidget);
expect(find.widgetWithIcon(AppBar, Icons.filter_3), findsNothing);
expect(find.text('Material 3'), findsOneWidget);
expect(Theme.of(defaultElevatedButton).useMaterial3, true);
expect(Theme.of(defaultIconButton).useMaterial3, true);
expect(Theme.of(defaultFAB).useMaterial3, true);
expect(Theme.of(defaultCard).useMaterial3, true);
expect(Theme.of(defaultChip).useMaterial3, true);
Finder appbarM3Icon = find.descendant(
of: find.byType(AppBar),
matching: find.widgetWithIcon(IconButton, Icons.filter_2));
await tester.tap(appbarM3Icon);
await tester.pumpAndSettle(const Duration(microseconds: 500));
BuildContext updatedElevatedButton =
tester.firstElement(find.byType(ElevatedButton));
BuildContext updatedIconButton =
tester.firstElement(find.byType(IconButton));
BuildContext updatedFAB =
tester.firstElement(find.byType(FloatingActionButton));
BuildContext updatedCard = tester.firstElement(find.byType(Card));
BuildContext updatedChip =
tester.firstElement(find.widgetWithText(ActionChip, 'Assist'));
Finder updatedDialog = find.text('Show dialog');
await tester.tap(updatedDialog);
await tester.pumpAndSettle(const Duration(microseconds: 500));
BuildContext updatedAlertDialog =
tester.firstElement(find.byType(AlertDialog));
expect(Theme.of(updatedAlertDialog).useMaterial3, false);
Finder updatedDismiss = find.text('Dismiss');
await tester.tap(updatedDismiss);
await tester.pumpAndSettle(const Duration(microseconds: 500));
expect(find.widgetWithIcon(AppBar, Icons.filter_3), findsOneWidget);
expect(find.widgetWithIcon(AppBar, Icons.filter_2), findsNothing);
expect(find.text('Material 2'), findsOneWidget);
expect(Theme.of(updatedElevatedButton).useMaterial3, false);
expect(Theme.of(updatedIconButton).useMaterial3, false);
expect(Theme.of(updatedFAB).useMaterial3, false);
expect(Theme.of(updatedCard).useMaterial3, false);
expect(Theme.of(updatedChip).useMaterial3, false);
});
testWidgets(
'Other screens become Material2 mode after changing mode from '
'main screen', (tester) async {
await tester.pumpWidget(const App());
Finder appbarM2Icon = find.descendant(
of: find.byType(AppBar),
matching: find.widgetWithIcon(IconButton, Icons.filter_2));
await tester.tap(appbarM2Icon);
Finder secondScreenIcon = find.descendant(
of: find.byType(NavigationBar),
matching: find.widgetWithIcon(
NavigationDestination, Icons.format_paint_outlined));
await tester.tap(secondScreenIcon);
await tester.pumpAndSettle(const Duration(microseconds: 500));
BuildContext lightThemeText =
tester.element(find.text('Light ColorScheme'));
expect(Theme.of(lightThemeText).useMaterial3, false);
Finder thirdScreenIcon = find.descendant(
of: find.byType(NavigationBar),
matching: find.widgetWithIcon(
NavigationDestination, Icons.text_snippet_outlined));
await tester.tap(thirdScreenIcon);
await tester.pumpAndSettle(const Duration(microseconds: 500));
BuildContext displayLargeText = tester.element(find.text('Display Large'));
expect(Theme.of(displayLargeText).useMaterial3, false);
Finder fourthScreenIcon = find.descendant(
of: find.byType(NavigationBar),
matching: find.widgetWithIcon(
NavigationDestination, Icons.invert_colors_on_outlined));
await tester.tap(fourthScreenIcon);
await tester.pumpAndSettle(const Duration(microseconds: 500));
BuildContext material = tester.firstElement(find.byType(Material));
expect(Theme.of(material).useMaterial3, false);
});
testWidgets(
'Brightness mode switches between dark and light when'
'the brightness icon is clicked', (tester) async {
await tester.pumpWidget(const App());
Finder lightIcon = find.descendant(
of: find.byType(AppBar),
matching: find.widgetWithIcon(IconButton, Icons.light_mode_outlined));
Finder darkIcon = find.descendant(
of: find.byType(AppBar),
matching: find.widgetWithIcon(IconButton, Icons.dark_mode_outlined));
BuildContext appBar = tester.element(find.byType(AppBar).first);
BuildContext body = tester.firstElement(find.byType(Scaffold).first);
BuildContext navigationRail = tester.element(
find.widgetWithIcon(NavigationRail, Icons.format_paint_outlined));
expect(darkIcon, findsOneWidget);
expect(lightIcon, findsNothing);
expect(Theme.of(appBar).brightness, Brightness.light);
expect(Theme.of(body).brightness, Brightness.light);
expect(Theme.of(navigationRail).brightness, Brightness.light);
await tester.tap(darkIcon);
await tester.pumpAndSettle(const Duration(microseconds: 500));
BuildContext appBar2 = tester.element(find.byType(AppBar).first);
BuildContext body2 = tester.element(find.byType(Scaffold).first);
BuildContext navigationRail2 = tester.element(
find.widgetWithIcon(NavigationRail, Icons.format_paint_outlined));
expect(darkIcon, findsNothing);
expect(lightIcon, findsOneWidget);
expect(Theme.of(appBar2).brightness, Brightness.dark);
expect(Theme.of(body2).brightness, Brightness.dark);
expect(Theme.of(navigationRail2).brightness, Brightness.dark);
});
testWidgets('Color theme changes when a color is selected from menu',
(tester) async {
Color m3BaseColor = const Color(0xff65558f);
await tester.pumpWidget(Container());
await tester.pumpWidget(const App());
await tester.pump();
Finder menuIcon = find.descendant(
of: find.byType(AppBar),
matching: find.widgetWithIcon(IconButton, Icons.palette_outlined));
BuildContext appBar = tester
.element(find.widgetWithIcon(AppBar, Icons.palette_outlined).first);
BuildContext body = tester.element(find.byType(Scaffold).first);
expect(Theme.of(appBar).primaryColor, m3BaseColor);
expect(Theme.of(body).primaryColor, m3BaseColor);
await tester.tap(menuIcon);
await tester.pumpAndSettle();
await tester.tap(find.text('Blue').last);
await tester.pumpAndSettle();
BuildContext appBar2 = tester.element(find.byType(AppBar).first);
BuildContext body2 = tester.element(find.byType(Scaffold).first);
ThemeData expectedTheme = ThemeData(colorSchemeSeed: Colors.blue);
expect(Theme.of(appBar2).primaryColor, expectedTheme.primaryColor);
expect(Theme.of(body2).primaryColor, expectedTheme.primaryColor);
});
}
void widgetSetup(WidgetTester tester, double windowWidth,
{double? windowHeight}) {
final height = windowHeight ?? 846;
tester.view.devicePixelRatio = 2;
final dpi = tester.view.devicePixelRatio;
tester.view.physicalSize = Size(windowWidth * dpi, height * dpi);
}