public function testBarcodeLib()
{
$pad = BarcodeLib::padUPC('1');
$this->assertEquals('0000000000001', $pad, 'BarcodeLib::padUPC failed');
$checks = array('12345678901' => '2', '123456789012' => '8', '1234567890123' => '1');
foreach ($checks as $barcode => $check_digit) {
$calc = BarcodeLib::getCheckDigit($barcode);
$this->assertEquals($check_digit, $calc, 'Failed check digit calculation for ' . $barcode);
$with_check = $barcode . $check_digit;
$without_check = $barcode . ($check_digit + 1) % 10;
$this->assertEquals(true, BarcodeLib::verifyCheckdigit($with_check));
$this->assertEquals(false, BarcodeLib::verifyCheckdigit($without_check));
}
$upc_a = BarcodeLib::UPCACheckDigit('12345678901');
$this->assertEquals('123456789012', $upc_a, 'Failed UPC A check digit calculation');
$ean_13 = BarcodeLib::EAN13CheckDigit('123456789012');
$this->assertEquals('1234567890128', $ean_13, 'Failed EAN 13 check digit calculation');
$norm = BarcodeLib::normalize13('12345678901');
$this->assertEquals('0123456789012', $norm, 'Failed normalizing UPC-A to 13 digits');
$norm = BarcodeLib::normalize13('123456789012');
$this->assertEquals('1234567890128', $norm, 'Failed normalizing EAN-13 to 13 digits');
}