gistfile1.txt

using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace YourNamespace.Redis
{
    /// <summary>
    /// Interface for Redis queue operations
    /// </summary>
    public interface IRedisQueue<T>
    {
        Task<bool> EnqueueAsync(T item);
        Task<T> DequeueAsync();
        Task<T> PeekAsync();
        Task<int> GetLengthAsync();
        Task<bool> IsEmptyAsync();
        Task ClearAsync();
    }

    /// <summary>
    /// In-memory stub implementation of a Redis queue for integration testing
    /// </summary>
    public class RedisQueueStub<T> : IRedisQueue<T>
    {
        private readonly Queue<T> _inMemoryQueue = new Queue<T>();
        private readonly object _syncLock = new object();

        public Task<bool> EnqueueAsync(T item)
        {
            if (item == null)
                return Task.FromResult(false);
                
            lock (_syncLock)
            {
                _inMemoryQueue.Enqueue(item);
            }
            
            return Task.FromResult(true);
        }

        public Task<T> DequeueAsync()
        {
            lock (_syncLock)
            {
                if (_inMemoryQueue.Count == 0)
                    return Task.FromResult<T>(default);
                    
                return Task.FromResult(_inMemoryQueue.Dequeue());
            }
        }

        public Task<T> PeekAsync()
        {
            lock (_syncLock)
            {
                if (_inMemoryQueue.Count == 0)
                    return Task.FromResult<T>(default);
                    
                return Task.FromResult(_inMemoryQueue.Peek());
            }
        }

        public Task<int> GetLengthAsync()
        {
            lock (_syncLock)
            {
                return Task.FromResult(_inMemoryQueue.Count);
            }
        }

        public Task<bool> IsEmptyAsync()
        {
            lock (_syncLock)
            {
                return Task.FromResult(_inMemoryQueue.Count == 0);
            }
        }

        public Task ClearAsync()
        {
            lock (_syncLock)
            {
                _inMemoryQueue.Clear();
            }
            
            return Task.CompletedTask;
        }
    }

    /// <summary>
    /// Factory for creating Redis queue instances
    /// </summary>
    public static class RedisQueueFactory
    {
        public static IRedisQueue<T> CreateStub<T>()
        {
            return new RedisQueueStub<T>();
        }
        
        // For real implementation (commented out for stub)
        /*
        public static IRedisQueue<T> Create<T>(string connectionString)
        {
            // Return actual Redis implementation
            throw new NotImplementedException("Real Redis implementation not included in stub");
        }
        */
    }
}