public function test_it_removes_an_item_on_the_cart()
 {
     $this->addNewItem();
     foreach (ShoppingCart::content() as $item) {
         ShoppingCart::remove($item->rowid);
         $this->assertEquals(0, ShoppingCart::count());
     }
 }
 public function count()
 {
     return ShoppingCart::count();
 }