public function testSha256()
{
$data = array(array('03d95e184cce34c3cfa58e9a277a09a7c5ed1b2a8134ea1e52887bc66fa3f47071', 'a5c756101065ac5b8f689139e6d856fa99e54b5000b6428b43729d334cc9277d'));
foreach ($data as $datum) {
$this->assertSame($datum[1], Util::sha256($datum[0]));
}
}