public void IsEmptyTest() { char code = 'a'; string data = "Test Data"; Subfield target = new Subfield(code, data); bool expected = false; bool actual = target.IsEmpty(); Assert.AreEqual(expected, actual); target.Data = null; expected = true; actual = target.IsEmpty(); Assert.AreEqual(expected, actual); target.Data = string.Empty; actual = target.IsEmpty(); Assert.AreEqual(expected, actual); }