function get_price_with_buyer_id_success()
{
    global $connection;
    $auctionId = 5;
    $startingPrice = 1;
    $result = get_price_with_buyer_id($auctionId, $startingPrice);
    assert($result['value'] == EXPECTED_PRICE_FOR_AUCTION_5);
    assert($result['user_id'] = 38);
}
function retrieve_followed_by_user()
{
    $auction_set = query_select_followed_by_user($_SESSION['userId']);
    for ($i = 0; $i < sizeof($auction_set); $i++) {
        //append the result of get_price($auctionId, $auctionStartingPrice) to
        //each auction associative array
        $winning_bid = get_price_with_buyer_id($auction_set[$i]['auctionId'], $auction_set[$i]['startingPrice']);
        $auction_set[$i]['winning_price'] = $winning_bid['value'];
        $auction_set[$i]['winner_id'] = $winning_bid['user_id'];
    }
    return $auction_set;
}