public void EmployeeDAO_FindAllDoctors_ReturnsAllDoctors()
{
List <Employee> doctors = dao.FindEmployeesByRole(Role.Doctor);
Assert.AreEqual(4, doctors.Count);
Assert.AreEqual("*****@*****.**", doctors[0].Username);
Assert.AreEqual("*****@*****.**", doctors[1].Username);
Assert.AreEqual("*****@*****.**", doctors[2].Username);
Assert.AreEqual("*****@*****.**", doctors[3].Username);
}