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// Copyright 2017 The Chromium 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';
void main() {
const Color _dividerColor = Color(0x1f333333);
testWidgets('ExpansionTile initial state', (WidgetTester tester) async {
final Key topKey = new UniqueKey();
const Key expandedKey = PageStorageKey<String>('expanded');
const Key collapsedKey = PageStorageKey<String>('collapsed');
const Key defaultKey = PageStorageKey<String>('default');
final Key tileKey = new UniqueKey();
await tester.pumpWidget(new MaterialApp(
theme: new ThemeData(
platform: TargetPlatform.iOS,
dividerColor: _dividerColor,
),
home: new Material(
child: new SingleChildScrollView(
child: new Column(
children: <Widget>[
new ListTile(title: const Text('Top'), key: topKey),
new ExpansionTile(
key: expandedKey,
initiallyExpanded: true,
title: const Text('Expanded'),
backgroundColor: Colors.red,
children: <Widget>[
new ListTile(
key: tileKey,
title: const Text('0')
)
]
),
new ExpansionTile(
key: collapsedKey,
initiallyExpanded: false,
title: const Text('Collapsed'),
children: <Widget>[
new 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;
expect(expandedContainerDecoration.color, Colors.red);
expect(expandedContainerDecoration.border.top.color, _dividerColor);
expect(expandedContainerDecoration.border.bottom.color, _dividerColor);
BoxDecoration collapsedContainerDecoration = getContainer(collapsedKey).decoration;
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;
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;
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;
expect(collapsedContainerDecoration.color, Colors.transparent);
expect(collapsedContainerDecoration.border.top.color, _dividerColor);
expect(collapsedContainerDecoration.border.bottom.color, _dividerColor);
});
}