Initial unit tests

1 files changed, 3 insertions, 5 deletions

diff --git a/src/directed_graphs.adb b/src/directed_graphs.adb
index 8b59051..4b9e823 100644
--- a/src/directed_graphs.adb
+++ b/src/directed_graphs.adb
@@ -974,10 +974,8 @@ package body Directed_Graphs is
     is
         use type Node_Maps.Cursor;
     begin
-        if Impl.Checks and then Position.Container = null then
-            raise Constraint_Error with "Graph does not exist";
-        end if;
-        if Position.Place = Node_Maps.No_Element or else
+        if Position.Container = null or else
+            Position.Place = Node_Maps.No_Element or else
             not Position.Container.Contains (Node_Maps.Key (Position.Place))
         then
             return No_Node;
@@ -2568,7 +2566,7 @@ package body Directed_Graphs is
             end if;
         end loop;
         raise Constraint_Error with "No unused nodes available";
-        return Extended_Node_ID_Type'First;
+        return Node_ID_Type'First;
     end Unused;
 
     function Unused