public function testHexDecodeGMP()
{
$cnt = (getenv('BITCOINLIB_EXTENSIVE_TESTING') ?: 1) * 100;
// GMP has no real upper limit on the number of bytes!
for ($i = 0; $i < $cnt; $i++) {
$length = mt_rand(1, 5000);
// Generate a random length hex string.
$hex = (string) bin2hex(mcrypt_create_iv($length, \MCRYPT_DEV_URANDOM));
// Get real decimal result.
$dec = gmp_strval(gmp_init($hex, 16), 10);
$this->assertEquals(BitcoinLib::hex_decode($hex), $dec);
}
}