DrupalKernelLegacyTest.php

<?php

namespace Drupal\Tests\Core\DrupalKernel;

use Drupal\Core\DrupalKernel;
use Drupal\Tests\UnitTestCase;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Event\KernelEvent;

/**
 * @coversDefaultClass \Drupal\Core\DrupalKernel
 * @group legacy
 */
class DrupalKernelLegacyTest extends UnitTestCase {
    
    /**
     * Tests deprecation message in overridden KernelEvent.
     *
     * @covers ::isMasterRequest
     */
    public function testKernelEventDeprecation() {
        $kernel = $this->createMock(DrupalKernel::class);
        $request = $this->createMock(Request::class);
        $event = new KernelEvent($kernel, $request, $kernel::MASTER_REQUEST);
        $this->expectDeprecation('Symfony\\Component\\HttpKernel\\Event\\KernelEvent::isMasterRequest() is deprecated, use isMainRequest()');
        $this->assertTrue($event->isMasterRequest());
    }

}