public void testIsValid() { Assert.IsTrue(VistaSocSecNum.isValid(new SocSecNum("555555555"))); Assert.IsFalse(VistaSocSecNum.isValid(new TestSoc("819", "11", "abcd"))); Assert.IsTrue(VistaSocSecNum.isValid(new TestSoc("819", "11", "7894"))); Assert.AreEqual(true, VistaSocSecNum.isValid(new TestSoc("111", "11", "1111"))); Assert.IsFalse(VistaSocSecNum.isValid(new TestSoc("abc", "11", "1111"))); Assert.IsFalse(VistaSocSecNum.isValid(new TestSoc("11", "ab", "1111"))); Assert.IsFalse(VistaSocSecNum.isValid(new TestSoc("111", "11", "abcd"))); Assert.IsFalse(VistaSocSecNum.isValid(new TestSoc("111", "1", "1111"))); }