LanguageNegotiationTest.php

<?php

namespace Drupal\language_test\Plugin\LanguageNegotiation;

use Drupal\language\LanguageNegotiationMethodBase;
use Symfony\Component\HttpFoundation\Request;

/**
 * Class for identifying language from a selected language.
 *
 * @LanguageNegotiation(
 *   id = "test_language_negotiation_method",
 *   weight = -10,
 *   name = @Translation("Test"),
 *   description = @Translation("This is a test language negotiation method."),
 *   types = {Drupal\Core\Language\LanguageInterface::TYPE_CONTENT,
 *   "test_language_type", "fixed_test_language_type"}
 * )
 */
class LanguageNegotiationTest extends LanguageNegotiationMethodBase {
    
    /**
     * The language negotiation method id.
     */
    const METHOD_ID = 'test_language_negotiation_method';
    
    /**
     * {@inheritdoc}
     */
    public function getLangcode(Request $request = NULL) {
        return 'it';
    }

}