对使用请求库的python应用程序进行单元测试 [英] Unit testing a python app that uses the requests library

问题描述

我正在编写一个使用Kenneth Reitz的请求库执行REST操作的应用程序，而我一直在努力寻找对这些应用程序进行单元测试的一种好方法，因为请求通过模块级方法提供其方法.

I am writing an application that performs REST operations using Kenneth Reitz's requests library and I'm struggling to find a nice way to unit test these applications, because requests provides its methods via module-level methods.

我想要的是能够综合双方之间对话的能力；提供一系列请求断言和响应.

What I want is the ability to synthesize the conversation between the two sides; provide a series of request assertions and responses.

推荐答案

事实上，该库在关于用户友好性和易用性的同时，有一个空白页面，涉及最终用户单元测试，这有点奇怪.但是，Dropbox有一个易于使用的库，毫不奇怪地称为 responses .这是其介绍性帖子.它说他们没有使用 httpretty ，但没有说明失败的原因，并用类似的API编写了一个库.

It is in fact a little strange that the library has a blank page about end-user unit testing, while targeting user-friendliness and ease of use. There's however an easy-to-use library by Dropbox, unsurprisingly called responses. Here is its intro post. It says they've failed to employ httpretty, while stating no reason of the fail, and written a library with similar API.

import unittest

import requests
import responses


class TestCase(unittest.TestCase):

  @responses.activate  
  def testExample(self):
    responses.add(**{
      'method'         : responses.GET,
      'url'            : 'http://example.com/api/123',
      'body'           : '{"error": "reason"}',
      'status'         : 404,
      'content_type'   : 'application/json',
      'adding_headers' : {'X-Foo': 'Bar'}
    })

    response = requests.get('http://example.com/api/123')

    self.assertEqual({'error': 'reason'}, response.json())
    self.assertEqual(404, response.status_code)

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