telegram-bot/tests/MemoryCache.cs

using System;
using System.Threading;
using System.Threading.Tasks;
using Kruzya.TelegramBot.Core.Cache;
using NUnit.Framework;

namespace Kruzya.TelegramBot.Core.Tests
{
    public class MemoryCache
    {
        [Test]
        public void GetSetItem()
        {
            var cache = new MemoryCache<string, int>();

            int id;
            Assert.IsFalse(cache.TryGetValue("user", out id), "GetValue() returned something");
            
            id = 5;
            cache.SetValue("user", id);

            id = 10;
            Assert.IsTrue(cache.TryGetValue("user", out id), "GetValue() doesn't returned any value");
            Assert.IsTrue(id == 5, "GetValue() returned don't expected value");
        }

        [Test]
        public void TimeToLive()
        {
            var cache = new MemoryCache<string, int>();
            cache.SetValue("user", 5, 1);
            cache.SetValue("admin", 10, 2);
            cache.SetValue("manager", 15, Timeout.Infinite);

            int id;
            Thread.Sleep(TimeSpan.FromSeconds(1));
            Assert.IsFalse(cache.TryGetValue("user", out id), "GetValue() returned expired entry (user).");
            Assert.IsTrue(cache.TryGetValue("admin", out id), "GetValue() doesn't returned live entry.");
            Assert.IsTrue(id == 10, "GetValue() returned unexpected entry.");
            
            Thread.Sleep(TimeSpan.FromSeconds(1));
            Assert.IsFalse(cache.TryGetValue("admin", out id), "GetValue() returned expired entry (admin).");
            Assert.IsTrue(cache.TryGetValue("manager", out id), "GetValue() doesn't returned live entry.");
            Assert.IsTrue(id == 15, "GetValue() returned unexpected entry.");
        }
    }
}