Responses

A utility library for mocking out the requests Python library.

Response body as string

import responses
import requests

@responses.activate
def test_my_api():
    responses.add(responses.GET, 'http://twitter.com/api/1/foobar',
                  body='{"error": "not found"}', status=404,
                  content_type='application/json')

    resp = requests.get('http://twitter.com/api/1/foobar')

    assert resp.json() == {"error": "not found"}

    assert len(responses.calls) == 1
    assert responses.calls[0].request.url == 'http://twitter.com/api/1/foobar'
    assert responses.calls[0].response.text == '{"error": "not found"}'

Request callback

import json

import responses
import requests

@responses.activate
def test_calc_api():

    def request_callback(request):
        payload = json.loads(request.body)
        resp_body = {'value': sum(payload['numbers'])}
        headers = {'request-id': '728d329e-0e86-11e4-a748-0c84dc037c13'}
        return (200, headers, json.dumps(resp_body))

    responses.add_callback(
        responses.POST, 'http://calc.com/sum',
        callback=request_callback,
        content_type='application/json',
    )

    resp = requests.post(
        'http://calc.com/sum',
        json.dumps({'numbers': [1, 2, 3]}),
        headers={'content-type': 'application/json'},
    )

    assert resp.json() == {'value': 6}

    assert len(responses.calls) == 1
    assert responses.calls[0].request.url == 'http://calc.com/sum'
    assert responses.calls[0].response.text == '{"value": 6}'
    assert (
        responses.calls[0].response.headers['request-id'] ==
        '728d329e-0e86-11e4-a748-0c84dc037c13'
    )

Instead of passing a string URL into responses.add or responses.add_callback you can also supply a compiled regular expression.

import re
import responses
import requests

# Instead of
responses.add(responses.GET, 'http://twitter.com/api/1/foobar',
              body='{"error": "not found"}', status=404,
              content_type='application/json')

# You can do the following
url_re = re.compile(r'https?://twitter.com/api/\d+/foobar')
responses.add(responses.GET, url_re,
              body='{"error": "not found"}', status=404,
              content_type='application/json')

A response can also throw an exception as follows.

import responses
import requests
from requests.exceptions import HTTPError

exception = HTTPError('Something went wrong')
responses.add(responses.GET, 'http://twitter.com/api/1/foobar',
              body=exception)
# All calls to 'http://twitter.com/api/1/foobar' will throw exception.

Note

Responses requires Requests >= 1.0

License

Copyright 2013 Dropbox, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.