// Copyright 2018 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_tools/src/base/time.dart';import'src/common.dart';voidmain(){group(SystemClock,(){test('can set a fixed time',(){finalSystemClockclock=SystemClock.fixed(DateTime(1991,8,23));expect(clock.now(),DateTime(1991,8,23));});test('can find a time ago',(){finalSystemClockclock=SystemClock.fixed(DateTime(1991,8,23));