DisplayExtenderUITest.php

<?php

namespace Drupal\Tests\views_ui\Functional;

use Drupal\views\Views;

/**
 * Tests the display extender UI.
 *
 * @group views_ui
 */
class DisplayExtenderUITest extends UITestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_view',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests the display extender UI.
     */
    public function testDisplayExtenderUI() {
        $this->config('views.settings')
            ->set('display_extenders', [
            'display_extender_test',
        ])
            ->save();
        $view = Views::getView('test_view');
        $view_edit_url = "admin/structure/views/view/{$view->storage->id()}/edit";
        $display_option_url = 'admin/structure/views/nojs/display/test_view/default/test_extender_test_option';
        $this->drupalGet($view_edit_url);
        $this->assertSession()
            ->linkByHrefExists($display_option_url, 0, 'Make sure the option defined by the test display extender appears in the UI.');
        $random_text = $this->randomMachineName();
        $this->drupalGet($display_option_url);
        $this->submitForm([
            'test_extender_test_option' => $random_text,
        ], 'Apply');
        $this->assertSession()
            ->linkExists($random_text);
        $this->submitForm([], 'Save');
        $view = Views::getView($view->storage
            ->id());
        $view->initDisplay();
        $display_extender_options = $view->display_handler
            ->getOption('display_extenders');
        $this->assertEquals($random_text, $display_extender_options['display_extender_test']['test_extender_test_option'], 'Make sure that the display extender option got saved.');
    }

}