trait StoreCreationTrait in Commerce Core 8.2

trait StoreCreationTrait {

  /**
   * Creates a store for the test.
   *
   * @param string $name
   *   The store name.
   * @param string $mail
   *   The store email.
   * @param string $type
   *   The store type.
   * @param bool $default
   *   Whether the store should be the default store.
   * @param string $country
   *   The store country code.
   * @param string $currency
   *   The store currency code.
   *
   * @return \Drupal\commerce_store\Entity\StoreInterface
   *   The store.
   */
  protected function createStore($name = NULL, $mail = NULL, $type = 'online', $default = TRUE, $country = 'US', $currency = 'USD') {
    if (!$name) {
      $name = $this
        ->randomMachineName(8);
    }
    if (!$mail) {
      $mail = \Drupal::currentUser()
        ->getEmail();
    }
    $currency_importer = \Drupal::service('commerce_price.currency_importer');
    $currency_importer
      ->import($currency);
    $store = Store::create([
      'type' => $type,
      'uid' => 1,
      'name' => $name,
      'mail' => $mail,
      'default_currency' => $currency,
      'timezone' => 'Australia/Sydney',
      'address' => [
        'country_code' => $country,
        'address_line1' => $this
          ->randomString(),
        'locality' => $this
          ->randomString(5),
        'administrative_area' => 'WI',
        'postal_code' => '53597',
      ],
      'billing_countries' => [
        $country,
      ],
      'is_default' => $default,
    ]);
    $store
      ->save();
    $store = Store::load($store
      ->id());
    return $store;
  }

}