Two Strategies for Testing Entity Framework - Effort and SQL CE

using System;
using System.Collections.Generic;
using System.Linq;
using System.Data.Entity.Infrastructure;
using System.Data.Entity;

namespace TestingEf.Data.Entities
{
    public static class MyAppContextExtensions
    {
		/// <summary>
		/// Adds Include functionality from EntityFramework to IDbSet collections. 
        /// Include paths will be applied if the <paramref name="dbSet"/> is found to be an actual
        /// DbSet, otherwise include paths are ignored.
		/// </summary>
		/// <typeparam name="T">The type of entity that the DbSet applies to</typeparam>
		/// <param name="dbSet">The DbSet to apply the Include paths to</param>
		/// <param name="includes">The navigation paths to include</param>
		/// <returns>An IQueryable of the original DbSet with the include paths applied</returns>
        public static IQueryable<T> Include<T>(this IDbSet<T> dbSet, params string[] includes) where T : class
        {
            if (dbSet is DbSet<T>)
            {
                DbQuery<T> query = (DbQuery<T>)dbSet;

                foreach (var include in includes)
                {
                    query = query.Include(include);
                }

                return query;
            }

            return dbSet;
        }
    }
}