BrowserTestBaseLegacyTest.php

<?php

namespace Drupal\FunctionalTests;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests BrowserTestBase legacy functionality.
 *
 * @group browsertestbase
 * @group legacy
 */
class BrowserTestBaseLegacyTest extends BrowserTestBase {
    
    /**
     * Test ::drupalGetHeaders().
     *
     * @expectedDeprecation Drupal\Tests\BrowserTestBase::drupalGetHeaders() is deprecated in drupal:8.8.0 and is removed from drupal:9.0.0. Use $this->getSession()->getResponseHeaders() instead. See https://www.drupal.org/node/3067207
     */
    public function testDrupalGetHeaders() {
        $this->assertSame($this->getSession()
            ->getResponseHeaders(), $this->drupalGetHeaders());
    }

}