/**
  * Ensures the getters work as expected.
  */
 public function testGetters()
 {
     $realm = 'Pipet service';
     $id = 'efdde334-fe7b-11e4-a322-1697f925ec7b';
     $nonce = 'd1954337-5319-4821-8427-115542e08d10';
     $version = '2.0';
     $headers = ['X-Custom-Signer1', 'X-Custom-Signer2'];
     $signature = 'MRlPr/Z1WQY2sMthcaEqETRMw4gPYXlPcTpaLWS2gcc=';
     $authHeader = new AuthorizationHeader($realm, $id, $nonce, $version, $headers, $signature);
     $this->assertEquals($realm, $authHeader->getRealm());
     $this->assertEquals($id, $authHeader->getId());
     $this->assertEquals($nonce, $authHeader->getNonce());
     $this->assertEquals($version, $authHeader->getVersion());
     $this->assertEquals($headers, $authHeader->getCustomHeaders());
     $this->assertEquals($signature, $authHeader->getSignature());
 }