AssertCategoryBreadcrumbs.php

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<?php
namespace Magento\Catalog\Test\Constraint;

use Magento\Catalog\Test\Fixture\Category;
use Magento\Catalog\Test\Page\Category\CatalogCategoryView;
use Magento\Mtf\Client\BrowserInterface;
use Magento\Mtf\Constraint\AbstractConstraint;

class AssertCategoryBreadcrumbs extends AbstractConstraint
{
    const HOME_PAGE = 'Home';

    protected $browser;

    public function processAssert(
        BrowserInterface $browser,
        Category $category,
        CatalogCategoryView $catalogCategoryView
    ) {
        $this->browser = $browser;

        $this->openCategory($category);

        $breadcrumbs = $this->getBreadcrumbs($category);
        \PHPUnit\Framework\Assert::assertNotEmpty(
            $breadcrumbs,
            'No breadcrumbs on category \'' . $category->getName() . '\' page.'
        );
        $pageBreadcrumbs = $catalogCategoryView->getBreadcrumbs()->getText();
        \PHPUnit\Framework\Assert::assertEquals(
            $breadcrumbs,
            $pageBreadcrumbs,
            'Wrong breadcrumbs of category page.'
            . "\nExpected: " . $breadcrumbs
            . "\nActual: " . $pageBreadcrumbs
        );
    }

    protected function openCategory(Category $category)
    {
        $categoryUrlKey = [];

        while ($category) {
            $categoryUrlKey[] = $category->hasData('url_key')
                ? strtolower($category->getUrlKey())
                : trim(strtolower(preg_replace('#[^0-9a-z%]+#i', '-', $category->getName())), '-');

            $category = $category->getDataFieldConfig('parent_id')['source']->getParentCategory();
            if ($category !== null && 1 == $category->getParentId()) {
                $category = null;
            }
        }
        $categoryUrlKey = $_ENV['app_frontend_url'] . implode('/', array_reverse($categoryUrlKey)) . '.html';

        $this->browser->open($categoryUrlKey);
    }

    protected function getBreadcrumbs(Category $category)
    {
        $breadcrumbs = [];

        while ($category) {
            $breadcrumbs[] = $category->getName();

            $category = $category->getDataFieldConfig('parent_id')['source']->getParentCategory();
            if ($category !== null && 1 == $category->getParentId()) {
                $category = null;
            }
        }
        $breadcrumbs[] = self::HOME_PAGE;

        return implode(' ', array_reverse($breadcrumbs));
    }

    public function toString()
    {
        return 'Breadcrumbs on category page equals to passed from fixture.';
    }
}