// 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_test/flutter_test.dart'; import 'package:flutter/widgets.dart'; import 'package:flutter/material.dart'; class TestIcon extends StatefulWidget { const TestIcon({Key key}) : super(key: key); @override TestIconState createState() => TestIconState(); } class TestIconState extends State<TestIcon> { IconThemeData iconTheme; @override Widget build(BuildContext context) { iconTheme = IconTheme.of(context); return const Icon(Icons.expand_more); } } class TestText extends StatefulWidget { const TestText(this.text, {Key key}) : super(key: key); final String text; @override TestTextState createState() => TestTextState(); } class TestTextState extends State<TestText> { TextStyle textStyle; @override Widget build(BuildContext context) { textStyle = DefaultTextStyle.of(context).style; return Text(widget.text); } } void main() { const Color _dividerColor = Color(0x1f333333); const Color _accentColor = Colors.blueAccent; const Color _unselectedWidgetColor = Colors.black54; const Color _headerColor = Colors.black45; testWidgets('ExpansionTile initial state', (WidgetTester tester) async { final Key topKey = UniqueKey(); const Key expandedKey = PageStorageKey<String>('expanded'); const Key collapsedKey = PageStorageKey<String>('collapsed'); const Key defaultKey = PageStorageKey<String>('default'); final Key tileKey = UniqueKey(); await tester.pumpWidget(MaterialApp( theme: ThemeData( dividerColor: _dividerColor, ), home: Material( child: SingleChildScrollView( child: Column( children: <Widget>[ ListTile(title: const Text('Top'), key: topKey), ExpansionTile( key: expandedKey, initiallyExpanded: true, title: const Text('Expanded'), backgroundColor: Colors.red, children: <Widget>[ ListTile( key: tileKey, title: const Text('0'), ), ], ), ExpansionTile( key: collapsedKey, initiallyExpanded: false, title: const Text('Collapsed'), children: <Widget>[ ListTile( key: tileKey, title: const Text('0'), ), ], ), const ExpansionTile( key: defaultKey, title: Text('Default'), children: <Widget>[ ListTile(title: Text('0')), ], ), ], ), ), ), )); double getHeight(Key key) => tester.getSize(find.byKey(key)).height; Container getContainer(Key key) => tester.firstWidget(find.descendant( of: find.byKey(key), matching: find.byType(Container), )); expect(getHeight(topKey), getHeight(expandedKey) - getHeight(tileKey) - 2.0); expect(getHeight(topKey), getHeight(collapsedKey) - 2.0); expect(getHeight(topKey), getHeight(defaultKey) - 2.0); BoxDecoration expandedContainerDecoration = getContainer(expandedKey).decoration as BoxDecoration; expect(expandedContainerDecoration.color, Colors.red); expect(expandedContainerDecoration.border.top.color, _dividerColor); expect(expandedContainerDecoration.border.bottom.color, _dividerColor); BoxDecoration collapsedContainerDecoration = getContainer(collapsedKey).decoration as BoxDecoration; expect(collapsedContainerDecoration.color, Colors.transparent); expect(collapsedContainerDecoration.border.top.color, Colors.transparent); expect(collapsedContainerDecoration.border.bottom.color, Colors.transparent); await tester.tap(find.text('Expanded')); await tester.tap(find.text('Collapsed')); await tester.tap(find.text('Default')); await tester.pump(); // Pump to the middle of the animation for expansion. await tester.pump(const Duration(milliseconds: 100)); final BoxDecoration collapsingContainerDecoration = getContainer(collapsedKey).decoration as BoxDecoration; expect(collapsingContainerDecoration.color, Colors.transparent); // Opacity should change but color component should remain the same. expect(collapsingContainerDecoration.border.top.color, const Color(0x15333333)); expect(collapsingContainerDecoration.border.bottom.color, const Color(0x15333333)); // Pump all the way to the end now. await tester.pump(const Duration(seconds: 1)); expect(getHeight(topKey), getHeight(expandedKey) - 2.0); expect(getHeight(topKey), getHeight(collapsedKey) - getHeight(tileKey) - 2.0); expect(getHeight(topKey), getHeight(defaultKey) - getHeight(tileKey) - 2.0); // Expanded should be collapsed now. expandedContainerDecoration = getContainer(expandedKey).decoration as BoxDecoration; expect(expandedContainerDecoration.color, Colors.transparent); expect(expandedContainerDecoration.border.top.color, Colors.transparent); expect(expandedContainerDecoration.border.bottom.color, Colors.transparent); // Collapsed should be expanded now. collapsedContainerDecoration = getContainer(collapsedKey).decoration as BoxDecoration; expect(collapsedContainerDecoration.color, Colors.transparent); expect(collapsedContainerDecoration.border.top.color, _dividerColor); expect(collapsedContainerDecoration.border.bottom.color, _dividerColor); }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS, TargetPlatform.macOS })); testWidgets('ListTileTheme', (WidgetTester tester) async { final Key expandedTitleKey = UniqueKey(); final Key collapsedTitleKey = UniqueKey(); final Key expandedIconKey = UniqueKey(); final Key collapsedIconKey = UniqueKey(); await tester.pumpWidget( MaterialApp( theme: ThemeData( accentColor: _accentColor, unselectedWidgetColor: _unselectedWidgetColor, textTheme: const TextTheme(subtitle1: TextStyle(color: _headerColor)), ), home: Material( child: SingleChildScrollView( child: Column( children: <Widget>[ const ListTile(title: Text('Top')), ExpansionTile( initiallyExpanded: true, title: TestText('Expanded', key: expandedTitleKey), backgroundColor: Colors.red, children: const <Widget>[ListTile(title: Text('0'))], trailing: TestIcon(key: expandedIconKey), ), ExpansionTile( initiallyExpanded: false, title: TestText('Collapsed', key: collapsedTitleKey), children: const <Widget>[ListTile(title: Text('0'))], trailing: TestIcon(key: collapsedIconKey), ), ], ), ), ), ), ); Color iconColor(Key key) => tester.state<TestIconState>(find.byKey(key)).iconTheme.color; Color textColor(Key key) => tester.state<TestTextState>(find.byKey(key)).textStyle.color; expect(textColor(expandedTitleKey), _accentColor); expect(textColor(collapsedTitleKey), _headerColor); expect(iconColor(expandedIconKey), _accentColor); expect(iconColor(collapsedIconKey), _unselectedWidgetColor); // Tap both tiles to change their state: collapse and extend respectively await tester.tap(find.text('Expanded')); await tester.tap(find.text('Collapsed')); await tester.pump(); await tester.pump(const Duration(seconds: 1)); await tester.pump(const Duration(seconds: 1)); expect(textColor(expandedTitleKey), _headerColor); expect(textColor(collapsedTitleKey), _accentColor); expect(iconColor(expandedIconKey), _unselectedWidgetColor); expect(iconColor(collapsedIconKey), _accentColor); }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS, TargetPlatform.macOS })); testWidgets('ExpansionTile subtitle', (WidgetTester tester) async { await tester.pumpWidget( const MaterialApp( home: Scaffold( body: ExpansionTile( title: Text('Title'), subtitle: Text('Subtitle'), children: <Widget>[ListTile(title: Text('0'))], ), ), ), ); expect(find.text('Subtitle'), findsOneWidget); }); }