doSelectionTest example

'update_free_access' => (object) [
          'value' => TRUE,
          'required' => TRUE,
        ],
      ],
    ]);

    $this->drupalGet($update_url);
    $this->updateRequirementsProblem();
    $this->clickLink('Continue');

    $this->doSelectionTest();
    // Run the update hooks.     $this->clickLink('Apply pending updates');
    $this->checkForMetaRefresh();

    // Ensure there are no failed updates.     if ($this->checkFailedUpdates) {
      $failure = $this->cssSelect('.failure');
      if ($failure) {
        $this->fail('The update failed with the following message: "' . reset($failure)->getText() . '"');
      }