DialogRendererTest.php

<?php

namespace Drupal\Tests\Core\Controller;

use Drupal\Core\Controller\TitleResolverInterface;
use Drupal\Core\Render\MainContent\DialogRenderer;
use Drupal\Tests\UnitTestCase;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * @coversDefaultClass \Drupal\Core\Render\MainContent\DialogRenderer
 * @group Ajax
 */
class DialogRendererTest extends UnitTestCase {
    
    /**
     * @group legacy
     * @expectedDeprecation The renderer service must be passed to Drupal\Core\Render\MainContent\DialogRenderer::__construct and will be required before Drupal 9.0.0. See https://www.drupal.org/node/3009400
     */
    public function testConstructorRendererArgument() {
        $title_resolver = $this->createMock(TitleResolverInterface::class);
        $container = $this->createMock(ContainerInterface::class);
        $container->expects($this->once())
            ->method('get')
            ->with('renderer')
            ->willReturn(NULL);
        \Drupal::setContainer($container);
        new DialogRenderer($title_resolver);
    }

}