public function testContaining()
{
$root = Category::getRootNode();
$list = ProductList::getNewInstance($root);
$list->save();
$product = Product::getNewInstance($root);
$product->save();
$list->addProduct($product);
$another = Product::getNewInstance($root);
$another->save();
$this->assertTrue($list->contains($product));
$this->assertFalse($list->contains($another));
}
