Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/user/src/Tests/UserLanguageTest.php

@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\user\Tests\UserLanguageTest.
+ */
+
+namespace Drupal\user\Tests;
+
+use Drupal\Core\Language\LanguageInterface;
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Functional tests for a user's ability to change their default language.
+ *
+ * @group user
+ */
+class UserLanguageTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('user', 'language');
+
+  /**
+   * Test if user can change their default language.
+   */
+  function testUserLanguageConfiguration() {
+    // 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->randomMachineName(16);
+    $edit = array(
+      'predefined_langcode' => 'custom',
+      'langcode' => $langcode,
+      'label' => $name,
+      'direction' => LanguageInterface::DIRECTION_LTR,
+    );
+    $this->drupalPostForm('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->id() . '/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,
+    );
+    $this->drupalPostForm($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();
+  }
+}