public function testSimpleSign()
{
$my_string = 'AAAAABBBBBCCCCCDDDDD';
$signed = Sign::signs($my_string, 'my-key');
$this->assertEquals(0, strpos($signed, $my_string));
$this->assertEquals('AAAAABBBBBCCCCCDDDDD.BwaUb-rznw8ZNplw7Zo2wAhoR84', $signed);
$this->assertEquals($my_string, Sign::unsigns($signed, 'my-key'));
}
