Issue #3248879 by alexpott: UpdatePathTestTrait doesn't test what it thinks it does

    \Drupal::state()->set('update_test_schema_version', 8001);

    $this->runUpdates();

    // Ensure that after running the updates the update functions have been

    // loaded. If they have not then the tests carried out in

    // \Drupal\Tests\UpdatePathTestTrait::runUpdates() can result in false

    // positives.

    $this->assertTrue(function_exists('update_test_semver_update_n_update_8001'), 'The update_test_semver_update_n_update_8001() has been loaded');

    $select = $connection->select('watchdog');

    $select->orderBy('wid', 'DESC');

    $select->range(0, 5);

      foreach (['update', 'post_update'] as $update_type) {

        switch ($update_type) {

          case 'update':

            drupal_load_updates();

            $all_updates = update_get_update_list();

            break;