AreaTextTest.php

<?php

namespace Drupal\Tests\views\Kernel\Handler;

use Drupal\Tests\views\Kernel\ViewsKernelTestBase;
use Drupal\views\Views;

/**
 * Tests the core views_handler_area_text handler.
 *
 * @group views
 * @see \Drupal\views\Plugin\views\area\Text
 */
class AreaTextTest extends ViewsKernelTestBase {
    public static $modules = [
        'system',
        'user',
        'filter',
    ];
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_view',
    ];
    protected function setUp($import_test_views = TRUE) {
        parent::setUp();
        $this->installConfig([
            'system',
            'filter',
        ]);
        $this->installEntitySchema('user');
    }
    public function testAreaText() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $view = Views::getView('test_view');
        $view->setDisplay();
        // add a text header
        $string = $this->randomMachineName();
        $view->displayHandlers
            ->get('default')
            ->overrideOption('header', [
            'area' => [
                'id' => 'area',
                'table' => 'views',
                'field' => 'area',
                'content' => [
                    'value' => $string,
                ],
            ],
        ]);
        // Execute the view.
        $this->executeView($view);
        $view->display_handler->handlers['header']['area']->options['content']['format'] = $this->randomString();
        $build = $view->display_handler->handlers['header']['area']
            ->render();
        $this->assertEqual('', $renderer->renderRoot($build), 'Nonexistent format should return empty markup.');
        $view->display_handler->handlers['header']['area']->options['content']['format'] = filter_default_format();
        $build = $view->display_handler->handlers['header']['area']
            ->render();
        $this->assertEqual(check_markup($string), $renderer->renderRoot($build), 'Existent format should return something');
        // Empty results, and it shouldn't be displayed .
        $this->assertEqual([], $view->display_handler->handlers['header']['area']
            ->render(TRUE), 'No result should lead to no header');
        // Empty results, and it should be displayed.
        $view->display_handler->handlers['header']['area']->options['empty'] = TRUE;
        $build = $view->display_handler->handlers['header']['area']
            ->render(TRUE);
        $this->assertEqual(check_markup($string), $renderer->renderRoot($build), 'No result, but empty enabled lead to a full header');
    }

}