how to create moq for property in entity framework

[solai kannan]

hi can anyone help how to write moq for entity for the method given below.

especially for properties like "db.Entry(driver).Property(x => x.EffectiveDate).IsModified = true;"

 public bool UpdateEffectiveDate(int driverId, DateTime effectiveDate, string UserId)

        {

           db myentity=new myentity();

            Driver driver = db.Drivers.Find(driverId);

            driver.EffectiveDate = effectiveDate;

            driver.LastModifiedBy = UserId;

            driver.LastModifiedDate = DateTime.Now;

            db.Drivers.Attach(driver);

            db.Entry(driver).Property(x => x.EffectiveDate).IsModified = true;

            db.Entry(driver).Property(x => x.LastModifiedBy).IsModified = true;

            db.Entry(driver).Property(x => x.LastModifiedDate).IsModified = true;

            return (db.SaveChanges() > 0);

        }

thanks in advance