fix: change to using HasFlag for checking existing compare results

Author: egil

src/AngleSharp.Diffing/Strategies/AttributeStrategies/BooleanAttributeComparer.cs

@@ -70,9 +70,9 @@ public CompareResult Compare(in AttributeComparison comparison, CompareResult cu
             ? CompareStrict(comparison)
             : true;
 
-        return hasSameValue ?
-            CompareResult.Same :
-            CompareResult.FromDiff(new AttrDiff(comparison, AttrDiffKind.Value));
+        return hasSameValue
+            ? CompareResult.Same
+            : CompareResult.FromDiff(new AttrDiff(comparison, AttrDiffKind.Value));
     }
 
     private static bool IsAttributeNamesEqual(in AttributeComparison comparison)

src/AngleSharp.Diffing/Strategies/ElementStrategies/ElementComparer.cs

@@ -41,7 +41,7 @@ public CompareResult Compare(in Comparison comparison, CompareResult currentDeci
             ? CompareResult.Same
             : CompareResult.FromDiff(new ElementDiff(comparison, ElementDiffKind.Name));
 
-        if (EnforceTagClosing && result == CompareResult.Same)
+        if (EnforceTagClosing && result.Decision.HasFlag(CompareDecision.Same))
         {
             if (testElement.SourceReference is not HtmlTagToken testTag)
                 throw new InvalidOperationException("No source reference attached to test element, cannot determine element tag closing style.");

src/AngleSharp.Diffing/Strategies/ElementStrategies/IgnoreAttributesElementComparer.cs

@@ -12,7 +12,7 @@ public static class IgnoreAttributesElementComparer
     /// </summary>
     public static CompareResult Compare(in Comparison comparison, CompareResult currentDecision)
     {
-        if (currentDecision == CompareResult.Skip || currentDecision == CompareResult.SkipAttributes || currentDecision == CompareResult.SkipChildrenAndAttributes)
+        if (currentDecision.Decision.HasFlag(CompareDecision.Skip) || currentDecision.Decision.HasFlag(CompareDecision.SkipAttributes))
             return currentDecision;
 
         if (!ControlHasTruthyIgnoreAttributesAttribute(comparison))

src/AngleSharp.Diffing/Strategies/ElementStrategies/IgnoreElementComparer.cs

@@ -12,7 +12,7 @@ public static class IgnoreElementComparer
     /// </summary>
     public static CompareResult Compare(in Comparison comparison, CompareResult currentDecision)
     {
-        if (currentDecision == CompareResult.Skip)
+        if (currentDecision.Decision.HasFlag(CompareDecision.Skip))
             return currentDecision;
 
         return ControlHasTruthyIgnoreAttribute(comparison)