class TourTestBase

abstract class TourTestBase extends BrowserTestBase {
    
    /**
     * Asserts the presence of page elements for tour tips.
     *
     * @code
     * // Basic example.
     * $this->assertTourTips();
     *
     * // Advanced example. The following would be used for multipage or
     * // targeting a specific subset of tips.
     * $tips = array();
     * $tips[] = array('data-id' => 'foo');
     * $tips[] = array('data-id' => 'bar');
     * $tips[] = array('data-class' => 'baz');
     * $this->assertTourTips($tips);
     * @endcode
     *
     * @param array $tips
     *   A list of tips which provide either a "data-id" or "data-class".
     */
    public function assertTourTips($tips = []) {
        // Get the rendered tips and their data-id and data-class attributes.
        if (empty($tips)) {
            // Tips are rendered as drupalSettings values.
            $drupalSettings = $this->getDrupalSettings();
            if (isset($drupalSettings['_tour_internal'])) {
                foreach ($drupalSettings['_tour_internal'] as $tip) {
                    $tips[] = [
                        'selector' => $tip['selector'] ?? NULL,
                    ];
                }
            }
        }
        // If the tips are still empty we need to fail.
        if (empty($tips)) {
            $this->fail('Could not find tour tips on the current page.');
        }
        else {
            // Check for corresponding page elements.
            $total = 0;
            $modals = 0;
            foreach ($tips as $tip) {
                if (!empty($tip['data-id'])) {
                    $elements = $this->getSession()
                        ->getPage()
                        ->findAll('css', '#' . $tip['data-id']);
                    $this->assertCount(1, $elements, new FormattableMarkup('Found corresponding page element for tour tip with id #%data-id', [
                        '%data-id' => $tip['data-id'],
                    ]));
                }
                elseif (!empty($tip['data-class'])) {
                    $elements = $this->getSession()
                        ->getPage()
                        ->findAll('css', '.' . $tip['data-class']);
                    $this->assertNotEmpty($elements, sprintf("Page element for tour tip with class .%s should be present", $tip['data-class']));
                }
                else {
                    // It's a modal.
                    $modals++;
                }
                $total++;
            }
        }
    }

}