Optimize Dmarc Policy check

Author: tinohager

src/Nager.EmailAuthentication.UnitTest/DmarcRecordParserTests/Parser/ComplexTest.cs

@@ -87,10 +87,15 @@ public void TryParse_InvalidDmarcStringInvalidValueAdkimAndAspf_ReturnFalse()
             Assert.IsNull(dmarcRecord);
         }
 
+        [DataRow(1)]
+        [DataRow(2)]
+        [DataRow(3)]
+        [DataRow(10)]
+        [DataRow(100)]
         [TestMethod]
-        public void TryParse_InvalidDmarcStringInvalidPolicy_ReturnFalse()
+        public void TryParse_InvalidDmarcStringInvalidPolicy_ReturnFalse(int value)
         {
-            var recordRaw = "v=DMARC1; p=100;";
+            var recordRaw = $"v=DMARC1; p={value};";
 
             var isParserSuccessful = DmarcRecordParser.TryParse(recordRaw, out var dmarcRecord);
 

src/Nager.EmailAuthentication/DmarcRecordParser.cs

@@ -344,7 +344,7 @@ private static bool TryGetDmarcPolicy(
             string input,
             [NotNullWhen(true)] out DmarcPolicy? dmarcPolicy)
         {
-            if (Enum.TryParse(input, true, out DmarcPolicy parsedPolicy) && Enum.IsDefined(parsedPolicy))
+            if (!int.TryParse(input, out _) && Enum.TryParse(input, true, out DmarcPolicy parsedPolicy) && Enum.IsDefined(parsedPolicy))
             {
                 dmarcPolicy = parsedPolicy;
                 return true;

src/Nager.EmailAuthentication/Nager.EmailAuthentication.csproj

@@ -20,7 +20,7 @@
 
     <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
 
-    <Version>4.1.1</Version>
+    <Version>4.1.2</Version>
   </PropertyGroup>
 
   <ItemGroup>