phpunit testing for beginers

private function needed(groupdata $groupdata, individual $individual)
    {
        foreach ($groupdata->getTargets() as $target) {
            if ($individual->hasName() && $target->hasName()) {
                if ($target->getName()->getId() == $individual->getName()->getId()) {
                    return true;
                }
            } else if ($individual->hasAge() && $target->hasAge()) {
                if ($target->getAge()->getId() == $individual->getAge()->getId()) {
                    return true;
                }
            } else {
                if ($target->getCity()->getId() == $individual->getCiry()->getId()) {
                    return true;
                }
            }
        }
        return false;
    }*/