public function transform($category_page_url, $pretty_print_json = false)
 {
     $crawler = new Crawler();
     /** loads the initial category page into a Crawler */
     $crawler->addHtmlContent($this->page_manager->getPage($category_page_url), 'ISO-8859-1');
     $category_page = new CategoryPage($crawler);
     $product_collection = new ProductCollection();
     /** loops through all the products on the category page */
     /** @todo handle cases where HTML structure throws out the crawler more elegantly */
     $category_page->getProducts()->each(function (Crawler $category_page_product_node, $i) use($product_collection) {
         try {
             $product_node = new CategoryPageProductNode($category_page_product_node);
             $url_of_product_page = $product_node->getProductHref();
             $crawler = new Crawler();
             /** loads the product page */
             $crawler->addHtmlContent($this->page_manager->getPage($url_of_product_page), 'ISO-8859-1');
             $product_page = new ProductPage($crawler);
             $product = new Product();
             /** gets the content from either the product or category page and saves it in the product entity */
             $product->setTitle($product_node->getTitle())->setDescription($product_page->getDescription())->setUnitPrice($product_node->getUnitPrice())->setSize($this->page_manager->getSizeOfPage($url_of_product_page));
             $product_collection->addProduct($product);
         } catch (\InvalidArgumentException $ex) {
         }
     });
     /** Combines the results with the total of all the unit prices */
     return json_encode(['results' => $product_collection->toArray(), 'total' => $product_collection->getSumOfUnitPrices() / 100], $pretty_print_json ? JSON_PRETTY_PRINT : 0);
 }
 public function test_it_extracts_description()
 {
     $html = file_get_contents(__DIR__ . '/../Fixtures/product-page.html');
     $crawler = new Crawler();
     $crawler->addHtmlContent($html, 'ISO-8859-1');
     $SUT = new SUT($crawler);
     $this->assertEquals("Apricots", $SUT->getDescription());
 }