ClearCacheBlockTest.php

<?php

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

use Drupal\block\BlockInterface;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests clear cache block behavior.
 *
 * @group Block
 *
 * @see \Drupal\system\Plugin\Block\ClearCacheBlock
 */
class ClearCacheBlockTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'block',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The clear cache block instance.
     *
     * @var \Drupal\block\BlockInterface
     */
    protected BlockInterface $clearCacheBlock;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $admin_user = $this->drupalCreateUser([
            'administer site configuration',
        ]);
        $this->drupalLogin($admin_user);
        $this->clearCacheBlock = $this->placeBlock('system_clear_cache_block', [
            'label' => 'Clear cache block',
        ]);
    }
    
    /**
     * Tests block behavior and access based on permissions.
     */
    public function testCacheClearBlock() : void {
        $this->drupalGet('<front>');
        $this->assertSession()
            ->pageTextContains('Clear cache block');
        $page = $this->getSession()
            ->getPage();
        $page->pressButton('Clear all caches');
        $this->assertSession()
            ->statusMessageContains('Caches cleared.');
        // Confirm that access is not allowed for non-authorized users.
        $this->drupalLogout();
        $this->drupalGet('<front>');
        $this->assertSession()
            ->pageTextNotContains('Clear cache block');
    }

}