RequestPagerTest.php

<?php

namespace Drupal\KernelTests\Core\Pager;

use Drupal\KernelTests\KernelTestBase;
use Symfony\Component\HttpFoundation\Request;

/**
 * @group Pager
 *
 * @coversDefaultClass \Drupal\Core\Pager\PagerParameters
 */
class RequestPagerTest extends KernelTestBase {
    
    /**
     * @covers ::findPage
     */
    public function testFindPage() {
        $request = Request::create('http://example.com', 'GET', [
            'page' => '0,10',
        ]);
        
        /* @var $request_stack \Symfony\Component\HttpFoundation\RequestStack */
        $request_stack = $this->container
            ->get('request_stack');
        $request_stack->push($request);
        $pager_params = $this->container
            ->get('pager.parameters');
        $this->assertEquals(10, $pager_params->findPage(1));
    }
    
    /**
     * @covers ::getQueryParameters
     */
    public function testGetQueryParameters() {
        $test_parameters = [
            'other' => 'arbitrary',
        ];
        $request = Request::create('http://example.com', 'GET', array_merge([
            'page' => '0,10',
        ], $test_parameters));
        
        /* @var $request_stack \Symfony\Component\HttpFoundation\RequestStack */
        $request_stack = $this->container
            ->get('request_stack');
        $request_stack->push($request);
        $pager_params = $this->container
            ->get('pager.parameters');
        $this->assertEquals($test_parameters, $pager_params->getQueryParameters());
        $this->assertEquals(0, $pager_params->findPage());
    }

}