'Get tar.gz file, using asynchronous background task'

def test_export_async(self):

    resp = self.client.post(self.url)
    self.assertEquals(resp.status_code, 200)
    resp = self.client.get(self.status_url)
    result = json.loads(resp.content)
    status = result['ExportStatus']
    self.assertEquals(status, 3)
    self.assertIn('ExportOutput', result)
    output_url = result['ExportOutput']
    resp = self.client.get(output_url)
    self._verify_export_succeeded(resp)
