packages/flutter/test/material/button_bar_test.dart

// Copyright 2016 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/material.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('ButtonBar default control smoketest', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: ButtonBar(),
      ),
    );
  });

  testWidgets('ButtonBar has a min height of 52 when using ButtonBarLayoutBehavior.constrained', (WidgetTester tester) async {
    await tester.pumpWidget(
      SingleChildScrollView(
        child: ListBody(
          children: <Widget>[
            ButtonTheme.bar(
              layoutBehavior: ButtonBarLayoutBehavior.constrained,
              child: const Directionality(
                textDirection: TextDirection.ltr,
                child: ButtonBar(
                  children: <Widget>[
                    SizedBox(width: 10.0, height: 10.0),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );

    final Finder buttonBar = find.byType(ButtonBar);
    expect(tester.getBottomRight(buttonBar).dy - tester.getTopRight(buttonBar).dy, 52.0);
  });

  testWidgets('ButtonBar has padding applied when using ButtonBarLayoutBehavior.padded', (WidgetTester tester) async {
    await tester.pumpWidget(
      SingleChildScrollView(
        child: ListBody(
          children: <Widget>[
            ButtonTheme.bar(
              layoutBehavior: ButtonBarLayoutBehavior.padded,
              child: const Directionality(
                textDirection: TextDirection.ltr,
                child: ButtonBar(
                  children: <Widget>[
                    SizedBox(width: 10.0, height: 10.0),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );

    final Finder buttonBar = find.byType(ButtonBar);
    expect(tester.getBottomRight(buttonBar).dy - tester.getTopRight(buttonBar).dy, 26.0);
  });
}