UserSaveTest.php

<?php

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

use Drupal\simpletest\WebTestBase;

/**
 * Tests \Drupal\user\UserStorageController::save() behavior.
 */
class UserSaveTest extends WebTestBase {
  public static function getInfo() {
    return array(
      'name' => 'User save test',
      'description' => 'Test account saving for arbitrary new uid.',
      'group' => 'User',
    );
  }

  /**
   * Test creating a user with arbitrary uid.
   */
  function testUserImport() {

    // User ID must be a number that is not in the database.
    $max_uid = db_query('SELECT MAX(uid) FROM {users}')
      ->fetchField();
    $test_uid = $max_uid + mt_rand(1000, 1000000);
    $test_name = $this
      ->randomName();

    // Create the base user, based on drupalCreateUser().
    $user = entity_create('user', array(
      'name' => $test_name,
      'uid' => $test_uid,
      'mail' => $test_name . '@example.com',
      'pass' => user_password(),
      'status' => 1,
    ));
    $user
      ->enforceIsNew();
    $user
      ->save();

    // Test if created user exists.
    $user_by_uid = user_load($test_uid);
    $this
      ->assertTrue($user_by_uid, 'Loading user by uid.');
    $user_by_name = user_load_by_name($test_name);
    $this
      ->assertTrue($user_by_name, 'Loading user by name.');
  }

}