ConsistentHash_Tests.cs

using System;
using Advanced.Algorithms.Distributed;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace Advanced.Algorithms.Tests
{
    [TestClass]
    public class ConsistentHashTests
    {
        [TestMethod]
        public void ConsistantHash_Smoke_Test()
        {
            var hash = new ConsistentHash<int>();

            hash.AddNode(15);
            hash.AddNode(25);
            hash.AddNode(172);

            for (var i = 200; i < 300; i++) hash.AddNode(i);

            hash.RemoveNode(15);
            hash.RemoveNode(172);
            hash.RemoveNode(25);

            var rnd = new Random();
            for (var i = 0; i < 1000; i++)
            {
                Assert.AreNotEqual(15, hash.GetNode(rnd.Next().ToString()));
                Assert.AreNotEqual(25, hash.GetNode(rnd.Next().ToString()));
                Assert.AreNotEqual(172, hash.GetNode(rnd.Next().ToString()));

                var t = hash.GetNode(rnd.Next().ToString());
                Assert.IsTrue(t >= 200 && t < 300);
            }
        }
    }
}