public void Should_Return_Value_When_Property_Is_Null()
 {
     Address address = new Address { ZipCode = null };
     var result = address.Return(x => x.ZipCode, "No zip code on file");
     Assert.AreEqual("No zip code on file", result);
 }
 public void Should_Return_Value_When_Property_Is_Default_ValueType()
 {
     Address address = new Address { Number = 0 };
     var result = address.Return(x => x.Number, -12345);
     Assert.AreEqual(-12345, result);
 }