Adds tests for the regex scoring.

zxcvbn-core-test/Scoring/RegexScoringTests.cs

@@ -0,0 +1,42 @@
+using FluentAssertions;
+using Xunit;
+using Zxcvbn.Matcher;
+using Zxcvbn.Matcher.Matches;
+
+namespace Zxcvbn.Tests.Scoring
+{
+    public class RegexScoringTests
+    {
+        [Fact]
+        public void CalculatesWithReferenceYear()
+        {
+            var match = new RegexMatch
+            {
+                Token = "1972",
+                RegexName = "recent_year",
+                i = 1,
+                j = 2,
+                Pattern = "regex"
+            };
+
+            var result = PasswordScoring.EstimateGuesses(match, "1972");
+            result.Should().Be(DateMatcher.ReferenceYear - 1972);
+        }
+
+        [Fact]
+        public void IsDelegatedToByEstimateGuesses()
+        {
+            var match = new RegexMatch
+            {
+                Token = "1972",
+                RegexName = "recent_year",
+                i = 1,
+                j = 2,
+                Pattern = "regex"
+            };
+
+            var result = PasswordScoring.EstimateGuesses(match, "1972");
+            result.Should().Be(DateMatcher.ReferenceYear - 1972);
+        }
+    }
+}

zxcvbn-core/Scoring/RegexGuessesCalculator.cs

@@ -13,7 +13,7 @@ public static double CalculateGuesses(RegexMatch match)
             switch (match.RegexName)
             {
                 case "recent_year":
-                    var yearSpace = Math.Abs(int.Parse(match.Pattern) - DateMatcher.ReferenceYear);
+                    var yearSpace = Math.Abs(int.Parse(match.Token) - DateMatcher.ReferenceYear);
                     yearSpace = Math.Max(yearSpace, MinimumYearSpace);
                     return yearSpace;