/**
  * Test add and remove item
  */
 public function testAddRemoveItem()
 {
     $country = new Category();
     $this->assertEquals(0, $country->getItems()->count());
     $country->addItem(new Item());
     $this->assertEquals(1, $country->getItems()->count());
     $item = $country->getItems()->first();
     $country->removeItem($item);
     $this->assertEquals(0, $country->getItems()->count());
 }