fix: fix bugs in policy equal and persist (#347)

Casbin/Abstractions/Model/IPolicyValues.cs

@@ -10,4 +10,6 @@ public interface IPolicyValues : IList<string>
     public string ToText();
 
     public bool Equals(IPolicyValues other);
+
+    int GetRealCount();
 }

Casbin/Model/PolicyValues.cs

@@ -17,6 +17,9 @@ public record PolicyValues : IPolicyValues
     public bool IsReadOnly => false;
 
     int ICollection<string>.Count => Values.Count;
+
+
+    int IPolicyValues.GetRealCount() => Count;
 
     string IList<string>.this[int index] { get => Values[index]; set => new NotImplementedException(); }
 
@@ -34,7 +37,22 @@ internal static string ToText(IEnumerable<string> values)
         => string.Join(PermConstants.PolicySeparatorString, values);
 
     internal static bool Equals<T>(T values, T other) where T : IPolicyValues
-        => values.Count == other.Count && values.ToText().Equals(other.ToText());
+    {
+        if (values.GetRealCount() != other.GetRealCount())
+        {
+            return false;
+        }
+
+        for(int i = 0; i< values.GetRealCount(); i++)
+        {
+            if (values[i] != other[i])
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
 
     internal static string ToStringValue<T>(T value) => value as string ?? value.ToString();
 

Casbin/Persist/PersistantPolicy.cs

@@ -31,7 +31,7 @@ public static TPersistPolicy Create<TPersistPolicy>(string section, string type,
         where TPersistPolicy : IPersistPolicy, new()
     {
         TPersistPolicy persistPolicy = new TPersistPolicy { Section = section, Type = type };
-        switch (values.Count)
+        switch (values.GetRealCount())
         {
             case 1:
                 persistPolicy.Value1 = values[0];
@@ -136,7 +136,7 @@ public static TPersistPolicy Create<TPersistPolicy>(string section, string type,
                 persistPolicy.Value12 = values[11];
                 break;
             default:
-                throw new ArgumentOutOfRangeException(nameof(values), values.Count,
+                throw new ArgumentOutOfRangeException(nameof(values), values.GetRealCount(),
                     "The number of values must be between 1 and 12.");
         }