Fix tests

gap/dot.gi

@@ -48,10 +48,10 @@ InstallMethod(GraphvizDigraph, "for no args", [], {} -> GraphvizDigraph(""));
 # ViewString
 #############################################################################
 
-InstallMethod(ViewString, "for a graphviz node", [IsGraphvizNode],
+InstallMethod(PrintString, "for a graphviz node", [IsGraphvizNode],
 n -> StringFormatted("<graphviz node {}>", GraphvizName(n)));
 
-InstallMethod(ViewString, "for a graphviz edge", [IsGraphvizEdge],
+InstallMethod(PrintString, "for a graphviz edge", [IsGraphvizEdge],
 function(e)
   local head, tail;
   head := GraphvizHead(e);
@@ -61,7 +61,8 @@ function(e)
                          GraphvizName(tail));
 end);
 
-InstallMethod(ViewString, "for a graphviz (di)graph", [IsGraphvizObjectWithSubobjects],
+InstallMethod(PrintString, "for a graphviz object with subobjects",
+[IsGraphvizObjectWithSubobjects],
 function(g)
   local result, edges, nodes, kind;
 
@@ -406,9 +407,8 @@ function(graph, name)
   # contexts and subgraphs, rather than just subgraphs as the name suggests
   # See https://github.com/digraphs/graphviz/issues/19
   if IsBound(subgraphs[name]) then
-    # TODO why are we talking about subgraphs in the error?
     ErrorFormatted("the 1st argument (a graphviz (di)graph) already has ",
-                   " a subgraph with name \"{}\"", name);
+                   " a context or subgraph with name \"{}\"", name);
   fi;
 
   ctx             := GV_Context(graph, name);
@@ -527,11 +527,14 @@ end);
 InstallMethod(String, "for a graphviz (di)graph",
 [IsGraphvizObjectWithSubobjects], graph -> GV_StringifyGraph(graph, false));
 
-InstallMethod(PrintObj, "for a graphviz (di)graph",
-[IsGraphvizObjectWithSubobjects],
-function(gv)
-  Print(String(gv));
-end);
+# Can't do the following because it conflicts with the PrintString above, we
+# leave this here as a reminder.
+
+# InstallMethod(PrintObj, "for a graphviz object with subobjects",
+# [IsGraphvizObjectWithSubobjects],
+# function(gv)
+#   Print(String(gv));
+# end);
 
 InstallMethod(GraphvizSetNodeLabels,
 "for a graphviz (di)graph and list of colors",
@@ -574,11 +577,10 @@ function(c)
     if IsString(c) then
       c := StringFormatted("\"{}\"", c);
     fi;
-    ErrorFormatted("invalid color {} ({}), ",
-        "valid colors are RGB values or names from ",
-        "the GraphViz 2.44.1 X11 Color Scheme",
-        " http://graphviz.org/doc/info/colors.html",
-        c,
-        TNAM_OBJ(c));
+    ErrorFormatted("invalid color {} ({}), valid colors are RGB values ",
+                   "or names from the GraphViz 2.44.1 X11 Color Scheme",
+                   " http://graphviz.org/doc/info/colors.html",
+                   c,
+                   TNAM_OBJ(c));
   fi;
 end);

gap/gv.gi

@@ -247,8 +247,10 @@ InstallOtherMethod(IsBound\[\],
 InstallMethod(GV_MapNames, "for a graphviz map",
 [GV_IsMap], m -> RecNames(m!.Data));
 
-InstallMethod(ViewString, "for a graphviz map", [GV_IsMap],
-m -> String(m!.Data));
+InstallMethod(ViewObj, "for a graphviz map", [GV_IsMap],
+function(m)
+  ViewObj(m!.Data);
+end);
 
 InstallMethod(Size, "for a graphviz map",
 [GV_IsMap], m -> Length(GV_MapNames(m)));

tst/graph.tst

@@ -33,24 +33,24 @@ gap> n := GraphvizAddNode(g, "n");
 gap> g;
 <graphviz graph with 1 node and 0 edges>
 gap> GraphvizNodes(g);
-rec( n := <object> )
+rec( n := <graphviz node n> )
 gap> GraphvizAddNode(g, "x");
 <graphviz node x>
 gap> g;
 <graphviz graph with 2 nodes and 0 edges>
 gap> GraphvizNodes(g);
-rec( n := <object>, x := <object> )
+rec( n := <graphviz node n>, x := <graphviz node x> )
 
 # Test add node (name)
 gap> g := GraphvizGraph();;
 gap> GraphvizAddNode(g, "n");
 <graphviz node n>
 gap> GraphvizNodes(g);
-rec( n := <object> )
+rec( n := <graphviz node n> )
 gap> GraphvizAddNode(g, "x");
 <graphviz node x>
 gap> GraphvizNodes(g);
-rec( n := <object>, x := <object> )
+rec( n := <graphviz node n>, x := <graphviz node x> )
 
 # Test has nodes
 gap> g := GraphvizGraph();;
@@ -99,7 +99,7 @@ gap> GraphvizAddEdge(g, "a", "b");;
 gap> GraphvizAddEdge(g, "a", "c");
 <graphviz edge (a, c)>
 gap> GraphvizNodes(g);
-rec( a := <object>, b := <object>, c := <object> )
+rec( a := <graphviz node a>, b := <graphviz node b>, c := <graphviz node c> )
 gap> GraphvizAddEdge(g, "c", "a");
 <graphviz edge (c, a)>
 gap> GraphvizAddEdge(g, "b", "d");
@@ -126,13 +126,13 @@ gap> GraphvizAddEdge(g, c, d);;
 gap> GraphvizRemoveNode(g, a);
 <graphviz graph with 3 nodes and 1 edge>
 gap> GraphvizNodes(g);
-rec( b := <object>, c := <object>, d := <object> )
+rec( b := <graphviz node b>, c := <graphviz node c>, d := <graphviz node d> )
 gap> GraphvizEdges(g);
 [ <graphviz edge (c, d)> ]
 gap> GraphvizRemoveNode(g, b);
 <graphviz graph with 2 nodes and 1 edge>
 gap> GraphvizNodes(g);
-rec( c := <object>, d := <object> )
+rec( c := <graphviz node c>, d := <graphviz node d> )
 
 # Test removing node
 gap> g := GraphvizGraph();;
@@ -141,13 +141,13 @@ gap> GraphvizAddEdge(g, "c", "d");;
 gap> GraphvizRemoveNode(g, "a");
 <graphviz graph with 3 nodes and 1 edge>
 gap> GraphvizNodes(g);
-rec( b := <object>, c := <object>, d := <object> )
+rec( b := <graphviz node b>, c := <graphviz node c>, d := <graphviz node d> )
 gap> GraphvizEdges(g);
 [ <graphviz edge (c, d)> ]
 gap> GraphvizRemoveNode(g, "b");
 <graphviz graph with 2 nodes and 1 edge>
 gap> GraphvizNodes(g);
-rec( c := <object>, d := <object> )
+rec( c := <graphviz node c>, d := <graphviz node d> )
 
 # Test renaming graph
 gap> g := GraphvizGraph();;

tst/subgraph.tst

@@ -60,7 +60,8 @@ gap> g := GraphvizGraph();;
 gap> GraphvizAddSubgraph(g, "a");;
 gap> GraphvizAddContext(g, "b");;
 gap> GraphvizSubgraphs(g);
-rec( a := <object>, b := <object> )
+rec( a := <graphviz graph a with 0 nodes and 0 edges>, 
+  b := <graphviz context b with 0 nodes and 0 edges> )
 
 # Test adding a node to a subgraph (does or does not add to parent???)
 # TODO need to nail down expected behaviour!
@@ -70,7 +71,7 @@ gap> GraphvizAddNode(s, "n");;
 gap> GraphvizNodes(g);
 rec(  )
 gap> GraphvizNodes(s);
-rec( n := <object> )
+rec( n := <graphviz node n> )
 
 # Test adding a node to a subgraph which is already in parent fails (by name)
 gap> g := GraphvizGraph("r");;
@@ -229,11 +230,11 @@ gap> GraphvizRemoveNode(g, "d");;
 gap> GraphvizNodes(g);
 rec(  )
 gap> GraphvizNodes(parent);
-rec( a := <object> )
+rec( a := <graphviz node a> )
 gap> GraphvizNodes(sibling);
-rec( b := <object> )
+rec( b := <graphviz node b> )
 gap> GraphvizNodes(child);
-rec( c := <object> )
+rec( c := <graphviz node c> )
 
 # Test context attribute resetting
 gap> g := GraphvizDigraph();;