ViewsPreprocessTest.php

<?php

namespace Drupal\Tests\views\Kernel;

use Drupal\entity_test\Entity\EntityTest;
use Drupal\views\Views;

/**
 * Tests the preprocessing functionality in views.theme.inc.
 *
 * @group views
 */
class ViewsPreprocessTest extends ViewsKernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    public static $testViews = [
        'test_preprocess',
    ];
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'entity_test',
        'user',
        'node',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE) {
        parent::setUp();
        $this->installEntitySchema('entity_test');
    }
    
    /**
     * Tests css classes on displays are cleaned correctly.
     */
    public function testCssClassCleaning() {
        \Drupal::service('theme_installer')->install([
            'test_theme',
        ]);
        $this->config('system.theme')
            ->set('default', 'test_theme')
            ->save();
        $entity = EntityTest::create();
        $entity->save();
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = \Drupal::service('renderer');
        $view = Views::getview('test_preprocess');
        $build = $view->buildRenderable();
        $renderer->renderRoot($build);
        $this->assertStringContainsString('class="entity-test--default entity-test__default', (string) $build['#markup']);
        $view->destroy();
        $view->setDisplay('display_2');
        $build = $view->buildRenderable();
        $renderer->renderRoot($build);
        $markup = (string) $build['#markup'];
        $this->assertStringContainsString('css_class: entity-test--default and-another-class entity-test__default', $markup);
        $this->assertStringContainsString('attributes: class="entity-test--default and-another-class entity-test__default', $markup);
    }

}