public function testGetCustomFieldsReturnsCorrectData()
 {
     $this->setMockResponse($this->client, array('custom-fields/getCustomFields'));
     $customFields = $this->client->getCustomFields();
     $this->assertInstanceOf('\\Mgrt\\Model\\ResultCollection', $customFields);
     $this->assertEquals($customFields->count(), 7);
     foreach ($customFields as $customField) {
         $this->assertInstanceOf('\\Mgrt\\Model\\CustomField', $customField);
     }
 }