Expose the sum ceiling as ISumService.MaxLevel

src/NosCore.Algorithm/Constants.cs

@@ -20,6 +20,7 @@ internal class Constants
         internal const byte MaxShellOptionLevel = 12;
         internal const byte MinShellValueLevel = 30;
         internal const byte MaxSpPerfection = 100;
+        internal const byte MaxSumLevel = 5;
         internal static readonly int ClassCount = Enum.GetNames(typeof(CharacterClassType)).Length;
     }
 }

src/NosCore.Algorithm/SumService/ISumService.cs

@@ -11,6 +11,11 @@ namespace NosCore.Algorithm.SumService
     /// </summary>
     public interface ISumService
     {
+        /// <summary>
+        /// Gets the highest level the sum tables cover; a combined level above it cannot be summed
+        /// </summary>
+        byte MaxLevel => Constants.MaxSumLevel;
+
         /// <summary>
         /// Gets the success rate for a summoning operation at a specific level
         /// </summary>

src/NosCore.Algorithm/SumService/SumService.cs

@@ -11,6 +11,9 @@ namespace NosCore.Algorithm.SumService
     /// </summary>
     public class SumService : ISumService
     {
+        /// <inheritdoc />
+        public byte MaxLevel => Constants.MaxSumLevel;
+
         internal static readonly byte[] SuccessRate = { 100, 100, 85, 70, 50, 20 };
         internal static readonly ushort[] Price = { 1500, 3000, 6000, 12000, 24000, 48000 };
         internal static readonly byte[] SandCost = { 5, 10, 15, 20, 25, 30 };

test/NosCore.Algorithm.Tests/DocumentationTest.cs

@@ -417,7 +417,7 @@ public void SumDocumentation()
 
             var resultBuilder = new StringBuilder($"# Sum Table");
             resultBuilder.AppendLine();
-            for (byte i = 0; i < 6; i++)
+            for (byte i = 0; i <= sumService.MaxLevel; i++)
             {
                 resultBuilder.AppendLine(
                     $"- Sum {i + 1} - Rate: {sumService.GetSuccessRate(i)}% - Cost: {sumService.GetPrice(i)} - Sand: {sumService.GetSandCost(i)}");