AttributeRepositoryTest.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Eav\Model;

use Magento\Eav\Api\AttributeRepositoryInterface;
use Magento\Framework\Api\FilterBuilder;
use Magento\Framework\Api\SearchCriteriaBuilder;
use Magento\Framework\Api\SortOrder;
use Magento\Framework\Api\SortOrderBuilder;
use Magento\TestFramework\Helper\Bootstrap;

class AttributeRepositoryTest extends \PHPUnit\Framework\TestCase
{
    /**
     * @var AttributeRepositoryInterface
     */
    private $repository;

    protected function setUp()
    {
        $this->repository = Bootstrap::getObjectManager()->create(AttributeRepositoryInterface::class);
    }

    /**
     * @magentoDataFixture Magento/Eav/_files/attribute_for_search.php
     */
    public function testGetList()
    {
        /** @var FilterBuilder $filterBuilder */
        $filterBuilder = Bootstrap::getObjectManager()->create(FilterBuilder::class);

        $filter1 = $filterBuilder->setField('backend_type')
            ->setValue('varchar')
            ->create();
        $filter2 = $filterBuilder->setField('is_user_defined')
            ->setValue(true)
            ->create();
        $filter3 = $filterBuilder->setField('is_required')
            ->setValue(true)
            ->create();

        /** @var SearchCriteriaBuilder $searchCriteriaBuilder */
        $searchCriteriaBuilder = Bootstrap::getObjectManager()->create(SearchCriteriaBuilder::class);

        $searchCriteriaBuilder->addFilters([$filter1, $filter2]);
        $searchCriteriaBuilder->addFilters([$filter3]);

        /** @var SortOrderBuilder $sortOrderBuilder */
        $sortOrderBuilder = Bootstrap::getObjectManager()->create(SortOrderBuilder::class);

        /** @var SortOrder $sortOrder */
        $sortOrder = $sortOrderBuilder->setField('attribute_code')
            ->setDirection(SortOrder::SORT_ASC)
            ->create();

        $searchCriteriaBuilder->setSortOrders([$sortOrder]);

        $searchCriteriaBuilder->setPageSize(2);
        $searchCriteriaBuilder->setCurrentPage(2);

        $searchCriteria = $searchCriteriaBuilder->create();

        $searchResult = $this->repository->getList('test', $searchCriteria);

        $this->assertEquals(3, $searchResult->getTotalCount());

        $items = array_values($searchResult->getItems());
        $this->assertEquals(1, count($items));
        $this->assertEquals('attribute_for_search_3', $items[0]['attribute_code']);
    }
}