PagerKernelTest.php

<?php

namespace Drupal\Tests\views\Kernel\Plugin;

use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Tests\views\Kernel\ViewsKernelTestBase;
use Drupal\views\Views;

/**
 * Tests pager-related APIs.
 *
 * @group views
 */
class PagerKernelTest extends ViewsKernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    public static $testViews = [
        'test_pager_full',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'user',
        'node',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE) : void {
        parent::setUp($import_test_views);
        $this->installEntitySchema('node');
        $this->installEntitySchema('user');
    }
    
    /**
     * Tests pager-related setter methods on ViewExecutable.
     *
     * @see \Drupal\views\ViewExecutable::setItemsPerPage
     * @see \Drupal\views\ViewExecutable::setOffset
     * @see \Drupal\views\ViewExecutable::setCurrentPage
     */
    public function testSetPagerMethods() {
        $view = Views::getView('test_pager_full');
        // Mark the view as cacheable in order have the cache checking working
        // below.
        $display =& $view->storage
            ->getDisplay('default');
        $display['display_options']['cache']['type'] = 'tag';
        $view->storage
            ->save();
        $output = $view->preview();
        \Drupal::service('renderer')->renderPlain($output);
        $this->assertSame(CacheBackendInterface::CACHE_PERMANENT, $output['#cache']['max-age']);
        foreach ([
            'setItemsPerPage',
            'setOffset',
            'setCurrentPage',
        ] as $method) {
            $view = Views::getView('test_pager_full');
            $view->setDisplay('default');
            $view->{$method}(1);
            $output = $view->preview();
            \Drupal::service('renderer')->renderPlain($output);
            $this->assertSame(CacheBackendInterface::CACHE_PERMANENT, $output['#cache']['max-age'], 'Max age kept.');
        }
    }

}