examples/api/test/widgets/gesture_detector/gesture_detector.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/gesture_detector/gesture_detector.0.dart'
    as example;
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets(
    'GestureDetector updates icon color and text on tap',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const example.GestureDetectorExampleApp(),
      );

      Icon icon = tester.widget(find.byIcon(Icons.lightbulb_outline));

      expect(find.text('TURN LIGHT ON'), findsOneWidget);
      expect(icon.color, Colors.black);

      await tester.tap(find.byType(GestureDetector));
      await tester.pump();

      icon = tester.widget(find.byIcon(Icons.lightbulb_outline));

      expect(find.text('TURN LIGHT OFF'), findsOneWidget);
      expect(icon.color, Colors.yellow.shade600);

      await tester.tap(find.byType(GestureDetector));
      await tester.pump();

      icon = tester.widget(find.byIcon(Icons.lightbulb_outline));

      expect(find.text('TURN LIGHT ON'), findsOneWidget);
      expect(icon.color, Colors.black);
    },
  );
}