/**
* The context keyword
* Isolates the tests ran in $callback
*
* @param string $description
* @param callback $callback
*
* @return void
*/
public function context($description, $callback)
{
// Ensure that the base context is clean for further contexts
$state = clone $this->current_suite;
$this->current_suite->add_description($description);
$callback();
$this->current_suite = $state;
}
