// Copyright 2019 The Chromium 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_test/flutter_test.dart'; import 'package:flutter/rendering.dart'; void main() { testWidgets('Default MaterialButton meets a11y contrast guidelines', (WidgetTester tester) async { await tester.pumpWidget( MaterialApp( home: Scaffold( body: Center( child: MaterialButton( child: const Text('MaterialButton'), onPressed: () { }, ), ), ), ), ); // Default, not disabled. await expectLater(tester, meetsGuideline(textContrastGuideline)); // Highlighted (pressed). final Offset center = tester.getCenter(find.byType(MaterialButton)); await tester.startGesture(center); await tester.pump(); // Start the splash and highlight animations. await tester.pump(const Duration(milliseconds: 800)); // Wait for splash and highlight to be well under way. await expectLater(tester, meetsGuideline(textContrastGuideline)); }, semanticsEnabled: true, skip: isBrowser, ); }