// test graphviz functions
func TestGraph(t *testing.T) {
gp.SetSeed(1)
pset := initPset(true)
exprs := testExprs(pset)
t.Log(exprs[2], exprs[2].Format())
graph := exprs[2].Graph("test")
t.Log(graph)
data, err := gp.Layout(graph, "svg")
if err != nil {
t.Error(err)
}
t.Log(string(data))
}
// return handler to serve SVG graph of best individual via HTTP
func (l *Logger) graphHandler() func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
if len(l.history) == 0 {
http.NotFound(w, r)
return
}
code := l.history[len(l.history)-1].Best.Code
graph := code.Graph("best")
data, err := gp.Layout(graph, "svg")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
send(w, r, data, "image/svg+xml")
}
}