Update odds to decimal

BritishHorseRacingApi.Tests/DataConverterHelperTests.cs

@@ -66,16 +66,18 @@ namespace BritishHorseRacingApi.Tests
 
         [Theory()]
         [InlineData("3/5", 1.6)]
+        [InlineData("20/1",21)]
         [InlineData("", null)]
         [InlineData(" ", null)]
         [InlineData(null, null)]
-        public void TestFractionOddsToDecimal(string value, decimal? expectedResult)
+        public void TestFractionOddsToDecimal(string value, double? expectedResult)
         {
             //Arrange
+            var decimalExpectedValue = (decimal?)expectedResult;
             //Act
             var result = DataConverterHelper.FractionOddsToDecimal(value);
             //Assert
-            Assert.Equal(expectedResult, result);
+            Assert.Equal(decimalExpectedValue, result);
         }
     }
 }

BritishHorseRacingApi/Helpers/DataConverterHelper.cs

@@ -67,14 +67,14 @@ namespace BritishHorseRacingApi.Helpers
             var lossDifference = GetComponent(match, "lossDifference", 0d);
             return (int)TimeSpan.FromSeconds(lossDifference).TotalMilliseconds;
         }
-        private static Regex _ratioRegex = new Regex("(?'Numerator'[0-9]*)/(?'Denominator'[0-9]*)", RegexOptions.Compiled);
+        private static Regex _ratioRegex = new Regex("(?'Numerator'[0-9]+)/(?'Denominator'[0-9]+)", RegexOptions.Compiled);
         public static decimal? FractionOddsToDecimal(string fraction)
         {
             if (String.IsNullOrWhiteSpace(fraction))
                 return null;
 
             var match = _ratioRegex.Match(fraction);
-            if (match.Groups.Count != 2)
+            if (!match.Success)
                 return null;
 
             var numerator = Decimal.Parse(match.Groups["Numerator"].Value);