examples/api/test/widgets/gesture_detector/gesture_detector.1_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.1.dart'
    as example;
import 'package:flutter_test/flutter_test.dart';

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

      Container container = tester.widget(
        find.ancestor(
          of: find.byType(GestureDetector),
          matching: find.byType(Container),
        ),
      );

      expect(container.color, Colors.white);

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

      container = tester.widget(
        find.ancestor(
          of: find.byType(GestureDetector),
          matching: find.byType(Container),
        ),
      );

      expect(container.color, Colors.yellow);

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

      container = tester.widget(
        find.ancestor(
          of: find.byType(GestureDetector),
          matching: find.byType(Container),
        ),
      );

      expect(container.color, Colors.white);
    },
  );
}