private function DrupalSelenium2Driver::waitFor in Drupal 10

Waits for a callback to return a truthy result and returns it.

Parameters

int|float $timeout: Maximal allowed waiting time in seconds.

callable $callback: Callback, which result is both used as waiting condition and returned. Will receive reference to `this driver` as first argument.

Return value

mixed The result of the callback.

File

core/tests/Drupal/FunctionalJavascriptTests/DrupalSelenium2Driver.php, line 200

Class

DrupalSelenium2Driver

Provides a driver for Selenium testing.

Namespace

Drupal\FunctionalJavascriptTests

Code

private function waitFor($timeout, callable $callback) {
  $start = microtime(TRUE);
  $end = $start + $timeout;
  do {
    $result = call_user_func($callback, $this);
    if ($result) {
      break;
    }
    usleep(10000);
  } while (microtime(TRUE) < $end);
  return $result;
}