UserLanguageTest.php

<?php

/**
 * @file
 * Definition of Drupal\user\Tests\UserLanguageTest.
 */
namespace Drupal\user\Tests;

use Drupal\simpletest\WebTestBase;

/**
 * Functional tests for a user's ability to change their default language.
 */
class UserLanguageTest extends WebTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  public static $modules = array(
    'user',
    'language',
  );
  public static function getInfo() {
    return array(
      'name' => 'User language settings',
      'description' => "Tests user's ability to change their default language.",
      'group' => 'User',
    );
  }

  /**
   * Test if user can change their default language.
   */
  function testUserLanguageConfiguration() {
    global $base_url;

    // User to add and remove language.
    $admin_user = $this
      ->drupalCreateUser(array(
      'administer languages',
      'access administration pages',
    ));

    // User to change their default language.
    $web_user = $this
      ->drupalCreateUser();

    // Add custom language.
    $this
      ->drupalLogin($admin_user);

    // Code for the language.
    $langcode = 'xx';

    // The English name for the language.
    $name = $this
      ->randomName(16);
    $edit = array(
      'predefined_langcode' => 'custom',
      'langcode' => $langcode,
      'name' => $name,
      'direction' => '0',
    );
    $this
      ->drupalPost('admin/config/regional/language/add', $edit, t('Add custom language'));
    $this
      ->drupalLogout();

    // Login as normal user and edit account settings.
    $this
      ->drupalLogin($web_user);
    $path = 'user/' . $web_user->uid . '/edit';
    $this
      ->drupalGet($path);

    // Ensure language settings widget is available.
    $this
      ->assertText(t('Language'), 'Language selector available.');

    // Ensure custom language is present.
    $this
      ->assertText($name, 'Language present on form.');

    // Switch to our custom language.
    $edit = array(
      'preferred_langcode' => $langcode,
    );
    $this
      ->drupalPost($path, $edit, t('Save'));

    // Ensure form was submitted successfully.
    $this
      ->assertText(t('The changes have been saved.'), 'Changes were saved.');

    // Check if language was changed.
    $this
      ->assertOptionSelected('edit-preferred-langcode', $langcode, 'Default language successfully updated.');
    $this
      ->drupalLogout();
  }

}