ViewsNoResultsBehaviorTest.php

<?php

namespace Drupal\Tests\views\Functional;


/**
 * Tests no results behavior.
 *
 * @group views
 */
class ViewsNoResultsBehaviorTest extends ViewTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'user',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE, $modules = []) : void {
        parent::setUp($import_test_views, $modules);
        $this->enableViewsTestModule();
        $user = $this->createUser([], NULL, TRUE);
        $this->drupalLogin($user);
        // Set the Stark theme and use the default templates from views module.
        
        /** @var \Drupal\Core\Extension\ThemeInstallerInterface $theme_installer */
        $theme_installer = \Drupal::service('theme_installer');
        $theme_installer->install([
            'stark',
        ]);
        $this->config('system.theme')
            ->set('default', 'stark')
            ->save();
    }
    
    /**
     * Tests the view with the text.
     */
    public function testDuplicateText() {
        $output = $this->drupalGet('admin/content');
        $this->assertEquals(1, substr_count($output, 'No content available.'), 'Only one message should be present');
    }

}