fix: invert logic

05/PrintQueue/UpdateValidator.cs

@@ -22,6 +22,8 @@ class UpdateValidator
     }
   }
   
+  // NOTE: This is basically a bubble sort
+  // 
   public Update Sort(Update update)
   {
     var sortedUpdate = new Update(update.Pages.ToList());
@@ -33,7 +35,7 @@ class UpdateValidator
         var currentPage = sortedUpdate.Pages[i];
         var nextPage = sortedUpdate.Pages[i + 1];
   
-        if (IsOutOfOrder(currentPage, nextPage) is false)
+        if (IsInOrder(currentPage, nextPage))
         {
           continue;
         }
@@ -52,7 +54,7 @@ class UpdateValidator
     
     foreach (var page in update.Pages)
     {
-      if (previousPages.Any(previousPage => IsOutOfOrder(previousPage, page)))
+      if (previousPages.Any(previousPage => IsInOrder(previousPage, page) is false))
       {
         return false;
       }
@@ -63,9 +65,9 @@ class UpdateValidator
     return true;
   }
 
-  private bool IsOutOfOrder(int previousPage, int futurePage)
+  private bool IsInOrder(int previousPage, int futurePage)
   {
     return Graph.TryGetValue(previousPage, out var dependents) &&
-           dependents.Contains(futurePage) is false;
+           dependents.Contains(futurePage);
   }
 }