examples/api/test/widgets/transitions/listenable_builder.3_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/transitions/listenable_builder.3.dart' as example;
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('Tapping FAB adds to values', (WidgetTester tester) async {
    await tester.pumpWidget(const example.ListenableBuilderExample());

    final Finder listContent = find.byWidgetPredicate((Widget widget) => widget is example.ListBody);

    expect(find.text('Current values:'), findsOneWidget);
    expect(find.byIcon(Icons.add), findsOneWidget);
    expect(
      (tester.widget(listContent) as example.ListBody).listNotifier.values.isEmpty,
      isTrue,
    );

    await tester.tap(find.byType(FloatingActionButton).first);
    await tester.pumpAndSettle();
    expect(
      (tester.widget(listContent) as example.ListBody).listNotifier.values.isEmpty,
      isFalse,
    );
    expect(
      (tester.widget(listContent) as example.ListBody).listNotifier.values,
      <int>[1464685455],
    );
    expect(find.text('1464685455'), findsOneWidget);
  });
}