public void Test_BirthdateValidationSuccess()
        {
            var patientDb = new PatientDb();

            Assert.IsTrue(patientDb.ValidateField("birthdate", "01.01.1970"));
            Assert.IsTrue(patientDb.ValidateField("birthdate", "31.05.2018"));
        }
        public void Test_BirthdateValidationFailure()
        {
            var patientDb = new PatientDb();

            Assert.IsFalse(patientDb.ValidateField("birthdate", ""));
            Assert.IsFalse(patientDb.ValidateField("birthdate", "invalid"));
            Assert.IsFalse(patientDb.ValidateField("birthdate", "00.00.0000"));
            Assert.IsFalse(patientDb.ValidateField("birthdate", "32.05.2018"));
        }