addHandler() public method

Register additional handlers to run before executing this call
public addHandler ( IPPHandler $handler )
$handler IPPHandler
 /**
  * @test
  */
 public function testMakeRequestWithHandlers()
 {
     $this->object->addHandler(new MockHandler());
     $req = new PPRequest(new MockNVPClass(), "NV");
     $ret = $this->object->makeRequest('GetInvoiceDetails', $req);
     $this->assertArrayHasKey('response', $ret);
     $this->assertContains("responseEnvelope.timestamp=", $ret['response']);
 }