Base Test class with Lazy Entity Framework Context and database Initialisation.

EFDataContextTest.cs

using System;
using System.Data.Entity;
using System.Diagnostics;
using NUnit.Framework;

namespace EntityFrameworkTests
{
	//TODO replace this stub with your own
	public class MyDataContext : DbContext
	{}

	[TestFixture]
	public abstract class DataTest
	{
		private readonly Lazy<MyDataContext> _dbContext = new Lazy<MyDataContext>(CreateContext, false);
		
		private static MyDataContext CreateContext()
		{
			var context = new MyDataContext();
			
			if (context.Database.Exists())
				context.Database.Delete();

			context.Database.Create();

			return context;
		}

		protected MyDataContext DataContext
		{
			get { return _dbContext.Value; }
		}
		
		/// <summary>
	        /// Inheritors should implement this to include their own test teardown code
	        /// </summary>
		protected abstract void OnTearDown();

		[TearDown]
		public void Destroy()
		{
			if (!_dbContext.IsValueCreated)
				return;

			try
			{
				_dbContext.Value.Database.Delete();
			}
			catch (Exception ex)
			{
				Assert.Inconclusive("Could not delete database, it may need to be removed manually.\n Check connection string for database location detail.\n Error Message:{0}", ex.Message);
			}
			finally
			{
				if (_dbContext != null)
					_dbContext.Value.Dispose();
			}
			this.OnTearDown();
		}
	}
}