add test code

src/game.go

@@ -27,6 +27,7 @@ func NewGame(config *Config, startscene SceneName) *Game {
 	game.Scenes[Menu] = NewMenuScene(game, config)
 	game.Scenes[Options] = NewOptionsScene(game, config)
 	game.Scenes[Keybindings] = NewKeybindingsScene(game, config)
+	game.Scenes[Toolbar] = NewToolbarScene(game, config)
 
 	// setup environment
 	ebiten.SetWindowSize(game.ScreenWidth, game.ScreenHeight)
@@ -67,6 +68,7 @@ func (game *Game) Update() error {
 
 func (game *Game) Draw(screen *ebiten.Image) {
 	// first draw primary scene[s], although there are only 1
+	skip := false
 	for current, scene := range game.Scenes {
 		if scene.IsPrimary() {
 			// primary scenes always draw
@@ -74,11 +76,15 @@ func (game *Game) Draw(screen *ebiten.Image) {
 
 			if current == game.CurrentScene {
 				// avoid to redraw it in the next step
-				return
+				skip = true
 			}
 		}
 	}
 
+	if skip {
+		return
+	}
+
 	scene := game.GetCurrentScene()
 	scene.Draw(screen)
 }