Tests complete, minor bugs fixed

1 files changed, 21 insertions, 5 deletions

diff --git a/src/directed_graphs.adb b/src/directed_graphs.adb
index 4b9e823..c690d87 100644
--- a/src/directed_graphs.adb
+++ b/src/directed_graphs.adb
@@ -226,7 +226,9 @@ package body Directed_Graphs is
             raise Constraint_Error with "Graph does not contain node";
         end if;
         for A of Container.Connections.Element (Node) loop
-            Result.Append (A.Node_ID);
+            if not Result.Contains (A.Node_ID) then
+                Result.Append (A.Node_ID);
+            end if;
         end loop;
         return V2A (Result);
     end Children;
@@ -454,6 +456,7 @@ package body Directed_Graphs is
             return False;
         end if;
         return Contains_In_Subgraph (Position, Node) and then
+            Position.Container.Has_Label (Node) and then
             Position.Container.Constant_Label_Reference (Node) = Label;
     end Contains_In_Subgraph;
 
@@ -505,6 +508,7 @@ package body Directed_Graphs is
             return False;
         end if;
         return Contains_In_Subgraph (Position, Edge) and then
+            Position.Container.Has_Label (Edge) and then
             Position.Container.Constant_Label_Reference (Edge) = Label;
     end Contains_In_Subgraph;
 
@@ -891,7 +895,7 @@ package body Directed_Graphs is
             end if;
         end if;
         for C in Position.Container.Iterate_Subgraph (Position) loop
-            Result := Result + Outdegree (Position);
+            Result := Result + Outdegree (C);
         end loop;
         return Result;
     end Edge_Count_In_Subgraph;
@@ -1072,7 +1076,9 @@ package body Directed_Graphs is
             end if;
         end if;
         for C in Position.Container.Iterate_Subgraph (Position) loop
-            if Position.Container.Node_Labels.Constant_Reference (Element (C)) = Label then
+            if Position.Container.Has_Label (Element (C)) and then
+                Position.Container.Node_Labels.Constant_Reference (Element (C)) = Label
+            then
                 Result.Append (Element (C));
             end if;
         end loop;
@@ -1939,13 +1945,18 @@ package body Directed_Graphs is
     end Next;
 
     procedure Next
-           (Position : in out Cursor) is
+           (Position : in out Cursor)
+    is
+        use type Node_Maps.Cursor;
     begin
         if Position.Container = null then
             Position := No_Element;
             return;
         end if;
         Node_Maps.Next (Position.Place);
+        if Position.Place = Node_Maps.No_Element then
+            Position := No_Element;
+        end if;
     end Next;
 
     function Next
@@ -2268,13 +2279,18 @@ package body Directed_Graphs is
     end Previous;
 
     procedure Previous
-           (Position : in out Cursor) is
+           (Position : in out Cursor)
+    is
+        use type Node_Maps.Cursor;
     begin
         if Position.Container = null then
             Position := No_Element;
             return;
         end if;
         Node_Maps.Previous (Position.Place);
+        if Position.Place = Node_Maps.No_Element then
+            Position := No_Element;
+        end if;
     end Previous;
 
     function Previous