NodeTitleTestBase.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Functional\Theme;

use Drupal\Tests\node\Functional\NodeTestBase;

/**
 * Tests node title for a theme.
 */
abstract class NodeTitleTestBase extends NodeTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'block',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->drupalPlaceBlock('page_title_block');
        $adminUser = $this->drupalCreateUser([
            'administer themes',
            'administer nodes',
            'create article content',
            'create page content',
        ]);
        $this->drupalLogin($adminUser);
    }
    
    /**
     * Get the theme name.
     *
     * @return string
     *   The theme to test.
     */
    protected function getTheme() : string {
        return explode('\\', get_class($this))[2];
    }
    
    /**
     * Creates one node with title 0 and tests if the node title has the correct value.
     */
    public function testNodeWithTitle0() : void {
        $theme = $this->getTheme();
        if ($theme !== $this->defaultTheme) {
            $system_theme_config = $this->container
                ->get('config.factory')
                ->getEditable('system.theme');
            $system_theme_config->set('default', $theme)
                ->save();
            \Drupal::service('theme_installer')->install([
                $theme,
            ]);
        }
        // Create "Basic page" content with title 0.
        $settings = [
            'title' => 0,
        ];
        $node = $this->drupalCreateNode($settings);
        // Test that 0 appears as <title>.
        $this->drupalGet('node/' . $node->id());
        $this->assertSession()
            ->titleEquals('0 | Drupal');
        // Test that 0 appears in the template <h1>.
        $this->assertSession()
            ->elementTextEquals('xpath', '//h1', '0');
    }

}