// 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/widgets.dart';
import 'package:flutter_test/flutter_test.dart';

import 'semantics_tester.dart';

void main() {
  testWidgets('Semantics 7 - Merging', (WidgetTester tester) async {
    final semantics = SemanticsTester(tester);

    String label;

    label = '1';
    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: Stack(
          fit: StackFit.expand,
          children: <Widget>[
            MergeSemantics(
              child: Semantics(
                checked: true,
                container: true,
                child: Semantics(container: true, label: label),
              ),
            ),
            MergeSemantics(
              child: Stack(
                fit: StackFit.expand,
                children: <Widget>[
                  Semantics(checked: true),
                  Semantics(label: label),
                ],
              ),
            ),
          ],
        ),
      ),
    );

    expect(
      semantics,
      hasSemantics(
        TestSemantics.root(
          children: <TestSemantics>[
            TestSemantics.rootChild(
              id: 1,
              flags: SemanticsFlag.hasCheckedState.index | SemanticsFlag.isChecked.index,
              label: label,
              rect: TestSemantics.fullScreen,
            ),
            // IDs 2 and 3 are used up by the nodes that get merged in
            TestSemantics.rootChild(
              id: 4,
              flags: SemanticsFlag.hasCheckedState.index | SemanticsFlag.isChecked.index,
              label: label,
              rect: TestSemantics.fullScreen,
            ),
            // IDs 5 and 6 are used up by the nodes that get merged in
          ],
        ),
      ),
    );

    label = '2';
    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: Stack(
          fit: StackFit.expand,
          children: <Widget>[
            MergeSemantics(
              child: Semantics(
                checked: true,
                container: true,
                child: Semantics(container: true, label: label),
              ),
            ),
            MergeSemantics(
              child: Stack(
                fit: StackFit.expand,
                children: <Widget>[
                  Semantics(checked: true),
                  Semantics(label: label),
                ],
              ),
            ),
          ],
        ),
      ),
    );

    expect(
      semantics,
      hasSemantics(
        TestSemantics.root(
          children: <TestSemantics>[
            TestSemantics.rootChild(
              id: 1,
              flags: SemanticsFlag.hasCheckedState.index | SemanticsFlag.isChecked.index,
              label: label,
              rect: TestSemantics.fullScreen,
            ),
            // IDs 2 and 3 are used up by the nodes that get merged in
            TestSemantics.rootChild(
              id: 4,
              flags: SemanticsFlag.hasCheckedState.index | SemanticsFlag.isChecked.index,
              label: label,
              rect: TestSemantics.fullScreen,
            ),
            // IDs 5 and 6 are used up by the nodes that get merged in
          ],
        ),
      ),
    );

    semantics.dispose();
  });
}