public function testPrepareCodes()
{
$C = new Codes();
$C->format = "ABC******";
// 9 characters + ',' will be 10 chars
$C->prefix = $C->setPrefix($C->format);
$C->num_random_chars = strlen($C->format) - strlen($C->prefix);
$C->fieldlength = 100;
// sets fieldlength artifically low just for test usually 32768
$num_codes = 101;
$codes = $C->generateMany($num_codes);
$code_length = strlen($codes[0]);
$prep = $C->prepareCodesForInsert($codes);
$c = ceil($num_codes * ($code_length + 1) / $C->fieldlength);
// echo "\n | first code : $codes[0] ";
// echo " | num_codes : $num_codes ";
// echo " | code_length : $code_length \n";
print_r($prep);
// we expect the number of strings of codes to be 11
$this->assertTrue(count($prep) == $c);
}