A nice wait for js calls ending function in behat

FeatureContext.php

<?php

/**
 * @author    Gildas Quéméner <gildas@akeneo.com>
 * @copyright 2013 Akeneo SAS (http://www.akeneo.com)
 * @license   http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

use Behat\Behat\Exception\BehaviorException;
use Behat\Mink\Driver\Selenium2Driver;

/**
 * Wait
 *
 * @param integer $time
 * @param string  $condition
 *
 * @throws BehaviorException If timeout is reached
 */
public function wait($time = 10000, $condition = null)
{
    if (!$this->getSession()->getDriver() instanceof Selenium2Driver) {
        return;
    }
    $start = microtime(true);
    $end = $start + $time / 1000.0;
    if ($condition === null) {
        $defaultCondition = true;
        $conditions = [
            "document.readyState == 'complete'",           // Page is ready
            "typeof $ != 'undefined'",                     // jQuery is loaded
            "!$.active",                                   // No ajax request is active
            "$('#page').css('display') == 'block'",        // Page is displayed (no progress bar)
            "$('.loading-mask').css('display') == 'none'", // Page is not loading (no black mask loading page)
            "$('.jstree-loading').length == 0",            // Jstree has finished loading
        ];
        $condition = implode(' && ', $conditions);
    } else {
        $defaultCondition = false;
    }
    // Make sure the AJAX calls are fired up before checking the condition
    $this->getSession()->wait(100, false);
    $this->getSession()->wait($time, $condition);
    // Check if we reached the timeout unless the condition is false to explicitly wait the specified time
    if ($condition !== false && microtime(true) > $end) {
        if ($defaultCondition) {
            foreach ($conditions as $condition) {
                $result = $this->getSession()->evaluateScript($condition);
                if (!$result) {
                    throw new BehaviorException(
                        sprintf(
                            'Timeout of %d reached when checking on "%s"',
                            $time,
                            $condition
                        )
                    );
                }
            }
        } else {
            throw new BehaviorException(sprintf('Timeout of %d reached when checking on %s', $time, $condition));
        }
    }
}

A really good function, thanks!
I have searched for the whole last days and nothing...

And your code is so easy to comprehend and modify 👍