BaseThemeMissingTest.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\Theme;

use Drupal\Core\Extension\InfoParserException;
use Drupal\Core\Site\Settings;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the behavior of a theme when base_theme info key is missing.
 *
 * @group Theme
 */
class BaseThemeMissingTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
    ];
    
    /**
     * The theme installer.
     *
     * @var \Drupal\Core\Extension\ThemeInstallerInterface
     */
    protected $themeInstaller;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Add a directory to extension discovery to find the theme with a missing
        // base class.
        // @see \Drupal\Core\Extension\ExtensionDiscovery::scan()
        $settings = Settings::getAll();
        $settings['test_parent_site'] = 'core/tests/fixtures/test_missing_base_theme';
        new Settings($settings);
        $this->themeInstaller = $this->container
            ->get('theme_installer');
    }
    
    /**
     * Tests exception is thrown.
     */
    public function testMissingBaseThemeException() : void {
        $this->expectException(InfoParserException::class);
        $this->expectExceptionMessage('Missing required key ("base theme") in core/tests/fixtures/test_missing_base_theme/test_missing_base_theme.info.yml, see https://www.drupal.org/node/3066038');
        $this->themeInstaller
            ->install([
            'test_missing_base_theme',
        ]);
    }

}