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 multi-page or
     * // targeting a specific subset of tips.
     * $tips = [];
     * $tips[] = ['data-id' => 'foo'];
     * $tips[] = ['data-id' => 'bar'];
     * $tips[] = ['data-class' => 'baz'];
     * $this->assertTourTips($tips);
     * @endcode
     *
     * @param array $tips
     *   A list of tips which provide either a "data-id" or "data-class".
     * @param bool $expectEmpty
     *   Whether or not the field is expected to be Empty.
     */
    public function assertTourTips(array $tips = [], bool $expectEmpty = FALSE) {
        // Get the rendered tips and their data-id and data-class attributes.
        if (empty($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,
                    ];
                }
            }
        }
        $tip_count = count($tips);
        if ($tip_count === 0 && $expectEmpty) {
            // No tips found as expected.
            return;
        }
        if ($tip_count > 0 && $expectEmpty) {
            $this->fail("No tips were expected but {$tip_count} were found");
        }
        $this->assertGreaterThan(0, $tip_count);
        // 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, sprintf('Found corresponding page element for tour tip with id #%s', $tip['data-id']));
            }
            elseif (!empty($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++;
        }
    }

}