Issue #2972531 by vaplas, alexpott: Random fail in TipPluginTextTest

   * Tests that getAriaId returns unique id per plugin instance.

   *

   * @see \Drupal\tour\Plugin\tour\tip\TipPluginText::getAriaId()

   * @runTestsInSeparateProcesses

   * This test calls \Drupal\Component\Utility\Html::getUniqueId() which uses a

   * static list. Run this test in a separate process to prevent side effects.

   */

  public function testGetAriaId() {

    $id_instance_one = $this->getRandomGenerator()->word(4, TRUE);

    $id_instance_two = $this->getRandomGenerator()->word(4, TRUE);

    $id_instance_one = 'one';

    $id_instance_two = 'two';

    $config_instance_one = [

      'id' => $id_instance_one,

    ];