public function testInstantiate()
{
$params = new Parameters($_SERVER);
$this->assertEquals($_SERVER['PATH'], $params->get('PATH'));
$this->assertEquals($_SERVER, $params->getData());
$this->assertEquals(null, $params->get('THE_KEY_NOT_EXISTS'));
$this->assertEquals('default-value', $params->get('THE_KEY_NOT_EXISTS', 'default-value'));
}