void SetUp() {
   apple_ptr_ = shared_ptr<Ingredient>(new Ingredient("apple"));
   banana_ptr_.reset(new Ingredient("banana"));
   carot_ptr_.reset(new Ingredient("carot"));
   scoped_oven_.reset(new Oven());
   spot_.reset(new SharedPointerPot("sp"));
   spot_->SetIngredient(*apple_ptr_);
   spot_->SetIngredient(*banana_ptr_);
   spot_->SetIngredient(*carot_ptr_);
 }