public function test_products_inherit_discounts_from_their_categories()
{
$parent = Factory::create(new Category(), ['is_inheriting' => true]);
$first = Factory::create(new Discount(), ['is_percentage' => true, 'amount' => 50]);
$first->categories()->attach($parent);
$child = Factory::create(new Category(), ['parent_id' => $parent->id]);
$second = Factory::create(new Discount(), ['is_percentage' => true, 'amount' => 50]);
$second->categories()->attach($child);
$orphan = Factory::create(new Category());
$third = Factory::create(new Discount(), ['is_percentage' => true, 'amount' => 50]);
$third->categories()->attach($orphan);
$product = Factory::create(new Product());
$product->categories()->sync([$parent->id, $child->id]);
$product->save();
$this->assertEquals(1, Price::whereProductId($product->id)->whereDiscountId($first->id)->count());
$this->assertEquals(1, Price::whereProductId($product->id)->whereDiscountId($second->id)->count());
$this->assertEquals(0, Price::whereProductId($product->id)->whereDiscountId($third->id)->count());
$product->discounts()->attach($third);
$product->save();
$this->assertEquals(1, Price::whereProductId($product->id)->whereDiscountId($third->id)->count());
}
