func (this *LisaService) distanceHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Add("content-type", "application/json")
decoder := json.NewDecoder(r.Body)
req := &DistanceRequest{}
if err := decoder.Decode(req); err != nil {
log.Print(err)
w.WriteHeader(400)
fmt.Fprintf(w, errBody(err))
return
}
if err := req.validate(); err != nil {
w.WriteHeader(400)
fmt.Fprintf(w, errBody(err))
return
}
calc, err := geo.NewGeoCalculator(geo.AtoUnits(req.Units))
if err != nil {
log.Printf("Error: %v", err)
fmt.Fprintf(w, errBody(err))
return
}
distances := calculateDistances(calc, req)
enc := json.NewEncoder(w)
if err := enc.Encode(distances); err != nil {
log.Printf("Error: %v", err)
fmt.Fprintf(w, errBody(err))
}
}
func TestCalculateDistances(t *testing.T) {
calc, err := geo.NewGeoCalculator(geo.KM)
if err != nil {
t.Fatal(err)
}
fromTo := FromTo{
From: Coords{
Lat: 0.0,
Lon: 0.0,
},
To: Coords{
Lat: 0.0,
Lon: 0.0,
},
}
units := "KM"
req := &DistanceRequest{
FromTos: []FromTo{
fromTo, fromTo, fromTo, fromTo, fromTo,
},
Units: units,
}
resp := calculateDistances(calc, req)
for _, distance := range resp.Distances {
if distance.Error != "" {
t.Errorf("Distance response contained unexpected error: %v", err)
}
if distance.Distance != 0 {
t.Errorf("Expected 0, got %f", distance.Distance)
}
if distance.FromTo != fromTo {
t.Errorf("Expected %v, got %v", fromTo, distance.FromTo)
}
if distance.Units != units {
t.Errorf("Expected %v, got %v", units, distance.Units)
}
}
}