public virtual void Test_Object_Select_DefaultIfEmpty()
{
using (var scope = new TransactionScope())
{
var obj = queryable.Create();
var value = queryable.DefaultIfEmpty(obj).ToList();
Assert.AreNotEqual(obj, value.First());
var valueInMemory = queryable.ToList().DefaultIfEmpty(obj);
Assert.AreEqual(value.First(), valueInMemory.First());
}
}