// Copyright 2017 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_test/flutter_test.dart';import'package:flutter/rendering.dart';import'package:flutter/widgets.dart';import'../rendering/mock_canvas.dart';/// Unit tests error.dart's usage via ErrorWidget.voidmain(){