Merge pull request #1 from adia-technology/Add_AHV_format_validation

Add AHV format validation

Author: PiotrSzperka

Adia.Ssn.Tests/Validators/AhvValidatorTests.cs

@@ -25,11 +25,12 @@ public void Setup()
         [TestCase("756.0298.4726.97", true)]
         [TestCase("756.5113.6381.28", true)]
         [TestCase("756.5466.9658.89", true)]
-        [TestCase("7561656967213", true)]
+        [TestCase("756.5466.965889", false)]
+        [TestCase("755:5466.9658.89", false)]
+        [TestCase("7561656967213", false)]
         [TestCase("756.1234.5678.95", false)]
         [TestCase("7561234567895", false)]
         [TestCase("75612345648955", false)]
-
         public void ValidateAhvNumberAsExpected(string ssn, bool expectedResult)
         {
             var result = _validator.Validate(ssn);

Adia.SsnValidator/Validators/AhvValidator.cs

@@ -1,18 +1,20 @@
 using System;
 using System.Linq;
+using System.Text.RegularExpressions;
 
 namespace Adia.SsnValidator.Validators
 {
     public class AhvValidator : IValidator
     {
         public bool Validate(string ahv)
         {
-            var ahv13 = ahv.Where(char.IsDigit).ToArray();
-            if(ahv13.Count() != 13)
+            var regex = new Regex(@"^756\.\d{4}\.\d{4}\.\d{2}$");
+            if(!regex.IsMatch(ahv))
             {
                 return false;
             }
 
+            var ahv13 = ahv.Where(char.IsDigit).ToArray();
             var ahv12 = ahv13.Take(12).Reverse().ToArray();
             var totalChecksum = 0;
             for (var i = 0; i < 12; i++)