routing: raise panic if duplicate routes are added

pkg/api/routing/route_register.go

@@ -129,6 +129,12 @@ func (rr *routeRegister) route(pattern, method string, handlers ...macaron.Handl
 	h = append(h, rr.subfixHandlers...)
 	h = append(h, handlers...)
 
+	for _, r := range rr.routes {
+		if r.pattern == rr.prefix+pattern && r.method == method {
+			panic("cannot add duplicate route")
+		}
+	}
+
 	rr.routes = append(rr.routes, route{
 		method:   method,
 		pattern:  rr.prefix + pattern,

pkg/api/routing/route_register_test.go

@@ -193,6 +193,23 @@ func TestRouteGroupInserting(t *testing.T) {
 	}
 }
 
+func TestDuplicateRoutShouldPanic(t *testing.T) {
+	defer func() {
+		if recover() != "cannot add duplicate route" {
+			t.Errorf("Should cause panic if duplicate routes are added ")
+		}
+	}()
+
+	rr := NewRouteRegister(func(name string) macaron.Handler {
+		return emptyHandler(name)
+	})
+
+	rr.Get("/api", emptyHandler("1"))
+	rr.Get("/api", emptyHandler("1"))
+
+	fr := &fakeRouter{}
+	rr.Register(fr)
+}
 func TestNamedMiddlewareRouteRegister(t *testing.T) {
 	testTable := []route{
 		{method: "DELETE", pattern: "/admin", handlers: emptyHandlers(2)},