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// 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_test/flutter_test.dart';
void main() {
test('ButtonThemeData defaults', () {
const ButtonThemeData theme = ButtonThemeData();
expect(theme.textTheme, ButtonTextTheme.normal);
expect(theme.constraints, const BoxConstraints(minWidth: 88.0, minHeight: 36.0));
expect(theme.padding, const EdgeInsets.symmetric(horizontal: 16.0));
expect(theme.shape, const RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(2.0)),
));
expect(theme.alignedDropdown, false);
expect(theme.layoutBehavior, ButtonBarLayoutBehavior.padded);
});
test('ButtonThemeData default overrides', () {
const ButtonThemeData theme = ButtonThemeData(
textTheme: ButtonTextTheme.primary,
minWidth: 100.0,
height: 200.0,
padding: EdgeInsets.zero,
shape: RoundedRectangleBorder(),
alignedDropdown: true,
);
expect(theme.textTheme, ButtonTextTheme.primary);
expect(theme.constraints, const BoxConstraints(minWidth: 100.0, minHeight: 200.0));
expect(theme.padding, EdgeInsets.zero);
expect(theme.shape, const RoundedRectangleBorder());
expect(theme.alignedDropdown, true);
});
test('ButtonThemeData.copyWith', () {
ButtonThemeData theme = const ButtonThemeData().copyWith();
expect(theme.textTheme, ButtonTextTheme.normal);
expect(theme.layoutBehavior, ButtonBarLayoutBehavior.padded);
expect(theme.constraints, const BoxConstraints(minWidth: 88.0, minHeight: 36.0));
expect(theme.padding, const EdgeInsets.symmetric(horizontal: 16.0));
expect(theme.shape, const RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(2.0)),
));
expect(theme.alignedDropdown, false);
expect(theme.colorScheme, null);
theme = const ButtonThemeData().copyWith(
textTheme: ButtonTextTheme.primary,
layoutBehavior: ButtonBarLayoutBehavior.constrained,
minWidth: 100.0,
height: 200.0,
padding: EdgeInsets.zero,
shape: const StadiumBorder(),
alignedDropdown: true,
colorScheme: const ColorScheme.dark(),
materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
);
expect(theme.textTheme, ButtonTextTheme.primary);
expect(theme.layoutBehavior, ButtonBarLayoutBehavior.constrained);
expect(theme.constraints, const BoxConstraints(minWidth: 100.0, minHeight: 200.0));
expect(theme.padding, EdgeInsets.zero);
expect(theme.shape, const StadiumBorder());
expect(theme.alignedDropdown, true);
expect(theme.colorScheme, const ColorScheme.dark());
});
testWidgets('ButtonTheme alignedDropdown', (WidgetTester tester) async {
final Key dropdownKey = UniqueKey();
Widget buildFrame({ required bool alignedDropdown, required TextDirection textDirection }) {
return MaterialApp(
builder: (BuildContext context, Widget? child) {
return Directionality(
textDirection: textDirection,
child: child!,
);
},
home: ButtonTheme(
alignedDropdown: alignedDropdown,
child: Material(
child: Builder(
builder: (BuildContext context) {
return Container(
alignment: Alignment.center,
child: DropdownButtonHideUnderline(
child: SizedBox(
width: 200.0,
child: DropdownButton<String>(
key: dropdownKey,
onChanged: (String? value) { },
value: 'foo',
items: const <DropdownMenuItem<String>>[
DropdownMenuItem<String>(
value: 'foo',
child: Text('foo'),
),
DropdownMenuItem<String>(
value: 'bar',
child: Text('bar'),
),
],
),
),
),
);
},
),
),
),
);
}
final Finder button = find.byKey(dropdownKey);
final Finder menu = find.byWidgetPredicate((Widget w) => '${w.runtimeType}' == '_DropdownMenu<String>');
await tester.pumpWidget(
buildFrame(
alignedDropdown: false,
textDirection: TextDirection.ltr,
),
);
await tester.tap(button);
await tester.pumpAndSettle();
// 240 = 200.0 (button width) + _kUnalignedMenuMargin (20.0 left and right)
expect(tester.getSize(button).width, 200.0);
expect(tester.getSize(menu).width, 240.0);
// Dismiss the menu.
await tester.tapAt(Offset.zero);
await tester.pumpAndSettle();
expect(menu, findsNothing);
await tester.pumpWidget(
buildFrame(
alignedDropdown: true,
textDirection: TextDirection.ltr,
),
);
await tester.tap(button);
await tester.pumpAndSettle();
// Aligneddropdown: true means the button and menu widths match
expect(tester.getSize(button).width, 200.0);
expect(tester.getSize(menu).width, 200.0);
// There are two 'foo' widgets: the selected menu item's label and the drop
// down button's label. The should both appear at the same location.
final Finder fooText = find.text('foo');
expect(fooText, findsNWidgets(2));
expect(tester.getRect(fooText.at(0)), tester.getRect(fooText.at(1)));
// Dismiss the menu.
await tester.tapAt(Offset.zero);
await tester.pumpAndSettle();
expect(menu, findsNothing);
// Same test as above except RTL
await tester.pumpWidget(
buildFrame(
alignedDropdown: true,
textDirection: TextDirection.rtl,
),
);
await tester.tap(button);
await tester.pumpAndSettle();
expect(fooText, findsNWidgets(2));
expect(tester.getRect(fooText.at(0)), tester.getRect(fooText.at(1)));
});
}