packages/flutter/test/widgets/inherited_dependencies_test.dart

// 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/src/widgets/basic.dart';
import 'package:flutter/src/widgets/framework.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('InheritedWidget dependencies show up in diagnostic properties', (WidgetTester tester) async {
    final GlobalKey key = GlobalKey();
    await tester.pumpWidget(Directionality(
      key: key,
      textDirection: TextDirection.ltr,
      child: Builder(builder: (BuildContext context) {
        Directionality.of(context);
        return const SizedBox();
      }),
    ));
    final InheritedElement element = key.currentContext! as InheritedElement;
    expect(
      element.toStringDeep(minLevel: DiagnosticLevel.info),
      equalsIgnoringHashCodes(
        'Directionality-[GlobalKey#00000](textDirection: ltr)\n'
        '└Builder(dependencies: [Directionality-[GlobalKey#00000]])\n'
        ' └SizedBox(renderObject: RenderConstrainedBox#00000)\n',
      ),
    );

    await tester.pumpWidget(Directionality(
      key: key,
      textDirection: TextDirection.rtl,
      child: Builder(builder: (BuildContext context) {
        Directionality.of(context);
        return const SizedBox();
      }),
    ));
    expect(
      element.toStringDeep(minLevel: DiagnosticLevel.info),
      equalsIgnoringHashCodes(
        'Directionality-[GlobalKey#00000](textDirection: rtl)\n'
        '└Builder(dependencies: [Directionality-[GlobalKey#00000]])\n'
        ' └SizedBox(renderObject: RenderConstrainedBox#00000)\n',
      ),
    );
  });
}