Robo\Robo::unsetContainer PHP Method

    public static function unsetContainer()
    {
        static::$container = null;
    }

 public function testThrowsExceptionWhenNoContainerAvailable()
 {
     \PHPUnit_Framework_TestCase::setExpectedExceptionRegExp('\\RuntimeException', '/container is not initialized yet.*/');
     Robo::unsetContainer();
     Robo::getContainer();
 }