button_theme_test.dart 6.07 KB
Newer Older
Ian Hickson's avatar
Ian Hickson committed
1
// Copyright 2014 The Flutter Authors. All rights reserved.
2 3 4 5 6 7
// 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';

8

9 10
void main() {
  test('ButtonThemeData defaults', () {
11
    const ButtonThemeData theme = ButtonThemeData();
12 13 14 15
    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(
16
      borderRadius: BorderRadius.all(Radius.circular(2.0)),
17
    ));
18
    expect(theme.alignedDropdown, false);
19
    expect(theme.layoutBehavior, ButtonBarLayoutBehavior.padded);
20 21 22
  });

  test('ButtonThemeData default overrides', () {
23
    const ButtonThemeData theme = ButtonThemeData(
24 25 26 27
      textTheme: ButtonTextTheme.primary,
      minWidth: 100.0,
      height: 200.0,
      padding: EdgeInsets.zero,
28
      shape: RoundedRectangleBorder(),
29
      alignedDropdown: true,
30 31 32 33 34
    );
    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());
35
    expect(theme.alignedDropdown, true);
36 37
  });

38 39 40
  test('ButtonThemeData.copyWith', () {
    ButtonThemeData theme = const ButtonThemeData().copyWith();
    expect(theme.textTheme, ButtonTextTheme.normal);
41
    expect(theme.layoutBehavior, ButtonBarLayoutBehavior.padded);
42 43 44
    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(
45
      borderRadius: BorderRadius.all(Radius.circular(2.0)),
46 47
    ));
    expect(theme.alignedDropdown, false);
48
    expect(theme.colorScheme, null);
49 50 51

    theme = const ButtonThemeData().copyWith(
      textTheme: ButtonTextTheme.primary,
52
      layoutBehavior: ButtonBarLayoutBehavior.constrained,
53 54 55 56 57
      minWidth: 100.0,
      height: 200.0,
      padding: EdgeInsets.zero,
      shape: const StadiumBorder(),
      alignedDropdown: true,
58 59
      colorScheme: const ColorScheme.dark(),
      materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
60 61
    );
    expect(theme.textTheme, ButtonTextTheme.primary);
62
    expect(theme.layoutBehavior, ButtonBarLayoutBehavior.constrained);
63 64 65 66
    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);
67
    expect(theme.colorScheme, const ColorScheme.dark());
68 69
  });

70
  testWidgets('ButtonTheme alignedDropdown', (WidgetTester tester) async {
71
    final Key dropdownKey = UniqueKey();
72

73
    Widget buildFrame({ required bool alignedDropdown, required TextDirection textDirection }) {
74
      return MaterialApp(
75
        builder: (BuildContext context, Widget? child) {
76
          return Directionality(
77
            textDirection: textDirection,
78
            child: child!,
79 80
          );
        },
81
        home: ButtonTheme(
82
          alignedDropdown: alignedDropdown,
83 84
          child: Material(
            child: Builder(
85
              builder: (BuildContext context) {
86
                return Container(
87
                  alignment: Alignment.center,
88
                  child: DropdownButtonHideUnderline(
89
                    child: SizedBox(
90
                      width: 200.0,
91
                      child: DropdownButton<String>(
92
                        key: dropdownKey,
93
                        onChanged: (String? value) { },
94 95
                        value: 'foo',
                        items: const <DropdownMenuItem<String>>[
96
                          DropdownMenuItem<String>(
97
                            value: 'foo',
98
                            child: Text('foo'),
99
                          ),
100
                          DropdownMenuItem<String>(
101
                            value: 'bar',
102
                            child: Text('bar'),
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160
                          ),
                        ],
                      ),
                    ),
                  ),
                );
              },
            ),
          ),
        ),
      );
    }

    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);

161
    // Same test as above except RTL
162 163 164 165 166 167 168 169 170 171 172 173
    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)));
  });
174
}