/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using Microsoft.VisualStudio.TestTools.UnitTesting;

using System;
using System.Collections.Generic;

namespace Org.Apache.Rocketmq
{
    [TestClass]
    public class SequenceGeneratorTest
    {

        [ClassInitialize]
        public static void SetUp(TestContext context)
        {
        }

        [TestMethod]
        public void testNext()
        {
            var set = new HashSet<string>();
            for (int i = 0; i < 500000; i++)
            {
                var nextId = SequenceGenerator.Instance.Next();
                if (set.Contains(nextId))
                {
                    Assert.Fail("SequenceGenerator violates uniqueness");
                }
                set.Add(nextId);
            }
        }
    }
}