public void IsValid()
 {
     var item = new IllnessHistoryDto()
     {
         Patient = new LightPatientDto(),
     };
     Assert.IsTrue(item.IsValid());
 }
 public void IsInvalid()
 {
     var item = new IllnessHistoryDto()
     {
         Patient = null,
     };
     Assert.IsFalse(item.IsValid());
 }