Initial setup for testing AI performance, random fixes

PkmnLib.Dynamic/Models/Battle.cs

@@ -66,6 +66,7 @@ public interface IBattle : IScriptSource, IDeepCloneable, IDisposable
     /// <summary>
     /// Whether the battle has ended.
     /// </summary>
+    [MemberNotNull(nameof(Result))]
     bool HasEnded { get; }
 
     /// <summary>
@@ -231,6 +232,7 @@ public class BattleImpl : ScriptSource, IBattle
     public IBattleRandom Random { get; }
 
     /// <inheritdoc />
+    [MemberNotNull(nameof(Result))]
     public bool HasEnded { get; private set; }
 
     /// <inheritdoc />
@@ -320,7 +322,10 @@ public class BattleImpl : ScriptSource, IBattle
     {
         if (!choice.User.IsUsable)
             return false;
-        if (HasForcedTurn(choice.User, out var forcedChoice) && choice != forcedChoice)
+        // Always allow moves such as Struggle. If we block this, we can run into an infinite loop
+        if (Library.MiscLibrary.IsReplacementChoice(choice))
+            return true;
+        if (HasForcedTurn(choice.User, out var forcedChoice) && !Equals(choice, forcedChoice))
             return false;
 
         if (choice is IMoveChoice moveChoice)