examples/api/test/widgets/shared_app_data/shared_app_data.0_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/material.dart';
import 'package:flutter_api_samples/widgets/shared_app_data/shared_app_data.0.dart'
    as example;
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('Verify correct labels are displayed', (WidgetTester tester) async {
    await tester.pumpWidget(
      const example.SharedAppDataExampleApp(),
    );

    expect(find.text('SharedAppData Sample'), findsOneWidget);
    expect(find.text('foo: initial'), findsOneWidget);
    expect(find.text('bar: initial'), findsOneWidget);
    expect(find.text('change foo'), findsOneWidget);
    expect(find.text('change bar'), findsOneWidget);
  });

  testWidgets('foo value can be updated', (WidgetTester tester) async {
    await tester.pumpWidget(
      const example.SharedAppDataExampleApp(),
    );

    int counter = 0;

    while (counter < 10) {
      counter++;

      await tester.tap(find.ancestor(
        of: find.text('change foo'),
        matching: find.byType(ElevatedButton),
      ));
      await tester.pump();

      expect(find.text('foo: FOO $counter'), findsOneWidget);
    }
  });

  testWidgets('bar value can be updated', (WidgetTester tester) async {
    await tester.pumpWidget(
      const example.SharedAppDataExampleApp(),
    );

    int counter = 0;

    while (counter < 10) {
      counter++;

      await tester.tap(find.ancestor(
        of: find.text('change bar'),
        matching: find.byType(ElevatedButton),
      ));
      await tester.pump();

      expect(find.text('bar: BAR $counter'), findsOneWidget);
    }
  });

  testWidgets('foo and bar values update independently of one another', (WidgetTester tester) async {
    await tester.pumpWidget(
      const example.SharedAppDataExampleApp(),
    );

    int fooCounter = 0;
    int barCounter = 0;

    for (int i = 0; i < 20; i++) {
      if (i.isEven) {
        fooCounter++;
      } else {
        barCounter++;
      }

      await tester.tap(
        find.ancestor(
          of: i.isEven ? find.text('change foo') : find.text('change bar'),
          matching: find.byType(ElevatedButton),
        ),
      );
      await tester.pump();

      expect(
        find.text(
          'foo: ${fooCounter == 0 ? 'initial' : 'FOO $fooCounter'}',
        ),
        findsOneWidget,
      );
      expect(
        find.text(
          'bar: ${barCounter == 0 ? 'initial' : 'BAR $barCounter'}',
        ),
        findsOneWidget,
      );
    }
  });
}