public function testUpdateCampaignReturnsCorrectData()
 {
     $campaign = $this->getFakeCampaign();
     $campaign->setId(1);
     $this->setMockResponse($this->client, array('campaigns/updateCampaign'));
     $result = $this->client->updateCampaign($campaign);
     $this->assertInternalType('boolean', $result);
     $this->assertEquals(true, $result);
 }