假设我的django/flask应用程序从API中提取信息,我如何测试连接异常是否被捕获并正确处理?
例如,这里有一个调用API的函数:
import requests def call_the_api(): url = 'http://httpbin.org/get' try: req = requests.get(url) if req.json().get('errors'): logger.warn("API error response") return {'request_error': 'api_error_response'} except requests.exceptions.ConnectionError: logger.warn('ConnectionError') return {'request_error': 'ConnectionTimeout'} except requests.exception.Timeout: logger.warn('API request timed out') return {'request_error': 'Timeout'} except Exception, ex: logger.warn("API request Exception: %s", ex) return {'request_error': ex} else: return req.json()
为了测试来自API的响应,我发现mock非常有用.
def mock_get_request(): response = requests.get.return_value json_file = 'sample_response.json' json_file_path = os.path.join(os.path.dirname(__file__), json_file) with open(json_file_path, 'r') as f: response.content = response.text = f.read() response.status_code = 200 response.encoding = 'utf-8' response.json = lambda: json.loads(response.content.decode(response.encoding)) response.url = u'%s' % args[0] return response class TestSuitabilityFunctions(TestCase): def test_call_the_api(self): requests.get = MagicMock(side_effect=mock_get_request) resp = call_the_api() self.assertEqual(resp.get('url'), "http://httpbin.org/get")
所以我的问题是如何模拟连接超时或错误?