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HTTP traffic mocking and expectations made easy

Project description

pook |Build Status| |PyPI| |Coverage Status| |Documentation Status| |Stability| |Quality| |Versions|

Versatile, expressive and hackable utility library for HTTP traffic mocking
and expectations made easy in `Python`_. Heavily inspired by `gock`_.

To get started, see the `documentation`_, `how it works`_, `FAQ`_ or `examples`_.

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- Simple, expressive and fluent API.
- Provides both Pythonic and chainable DSL API styles.
- Full-featured HTTP response definitions and expectations.
- Matches any HTTP protocol primitive (URL, method, query params, headers, body...).
- Full regular expressions capable mock expectations matching.
- Supports most popular HTTP clients via interceptor adapters.
- Configurable volatile, persistent or TTL limited mocks.
- Works with any testing framework/engine (unittest, pytest, nosetests...).
- First-class JSON & XML support matching and responses.
- Supports JSON Schema body matching.
- Works in both runtime and testing environments.
- Can be used as decorator and/or via context managers.
- Supports real networking mode with optional traffic filtering.
- Map/filter mocks easily for generic or custom mock expectations.
- Custom user-defined mock matcher functions.
- Simulated raised error exceptions.
- Network delay simulation (only available for ``aiohttp``).
- Pluggable and hackable API.
- Customizable HTTP traffic mock interceptor engine.
- Supports third-party mocking engines, such as `mocket`_.
- Fits good for painless test doubles.
- Does not support WebSocket traffic mocking.
- Works with Python +2.7 and +3.0 (including PyPy).
- Dependency-less: just 2 small dependencies for JSONSchema and XML tree comparison.

Supported HTTP clients

``pook`` can work with multiple mock engines, however it provides a
built-in one by default, which currently supports traffic mocking in
the following HTTP clients:

- ✔ `urllib3`_ v1+
- ✔ `requests`_ v2+
- ✔ `aiohttp`_ v1+ - v2+
- ✔ `urllib`_ / `http.client`_ v2/3
- ✘ `pycurl`_ (see `#16`_)

More HTTP clients can be supported progressively.

**Note**: only recent HTTP client package versions were tested.


Using ``pip`` package manager (requires pip 1.8+):

.. code:: bash

pip install --upgrade pook

Or install the latest sources from Github:

.. code:: bash

pip install -e git+git://

Getting started

See ReadTheDocs documentation:

|Documentation Status|


See `annotated API reference`_ documention.


See `examples`_ documentation for full featured code and use case examples.

Basic mocking:

.. code:: python

import pook
import requests

def test_my_api():
mock = pook.get('', reply=404, response_json={'error': 'not found'})

resp = requests.get('')
assert resp.status_code == 404
assert resp.json() == {"error": "not found"}
assert mock.calls == 1

Using the chainable API DSL:

.. code:: python

import pook
import requests

def test_my_api():
mock = (pook.get('')
.json({'error': 'not found'}))

resp = requests.get('')
assert resp.json() == {"error": "not found"}
assert mock.calls == 1

Using the decorator:

.. code:: python

import pook
import requests

@pook.get('', reply=204)
@pook.get('', reply=200)
def fetch(url):
return requests.get(url)

res = fetch('')
print('#1 status:', res.status_code)

res = fetch('')
print('#2 status:', res.status_code)

Simple ``unittest`` integration:

.. code:: python

import pook
import unittest
import requests

class TestUnitTestEngine(unittest.TestCase):

def test_request(self):
res = requests.get('')
self.assertEqual(res.status_code, 204)

def test_request_with_context_manager(self):
with pook.use():
pook.get('', reply=204)
res = requests.get('')
self.assertEqual(res.status_code, 204)

Using the context manager for isolated HTTP traffic interception blocks:

.. code:: python

import pook
import requests

# Enable HTTP traffic interceptor
with pook.use():
pook.get('', reply=204)

res = requests.get('')
print('#1 status:', res.status_code)

# Interception-free HTTP traffic
res = requests.get('')
print('#2 status:', res.status_code)

Example using `mocket`_ Python library as underlying mock engine:

.. code:: python

import pook
import requests
from mocket.plugins.pook_mock_engine import MocketEngine

# Use mocket library as underlying mock engine

# Explicitly enable pook HTTP mocking (optional)

# Target server URL to mock out
url = ''

# Define your mock
mock = pook.get(url,
reply=404, times=2,
headers={'content-type': 'application/json'},
response_json={'error': 'foo'})

# Run first HTTP request
assert mock.calls == 1

# Run second HTTP request
res = requests.get(url)
assert mock.calls == 2

# Assert response data
assert res.status_code == 404
assert res.json() == {'error': 'foo'}

# Explicitly disable pook (optional)

Example using Hy language (Lisp dialect for Python):

.. code:: hy

(import [pook])
(import [requests])

(defn request [url &optional [status 404]]
(doto (.mock pook url) (.reply status))
(let [res (.get requests url)]
(. res status_code)))

(defn run []
(with [(.use pook)]
(print "Status:" (request "" :status 204))))

;; Run test program
(defmain [&args] (run))


Clone the repository:

.. code:: bash

git clone

Install dependencies:

.. code:: bash

pip install -r requirements.txt -r requirements-dev.txt

Install Python dependencies:

.. code:: bash

make install

Lint code:

.. code:: bash

make lint

Run tests:

.. code:: bash

make test

Generate documentation:

.. code:: bash

make htmldocs


MIT - Tomas Aparicio

.. _Go:
.. _Python:
.. _gock:
.. _annotated API reference:
.. _#16:
.. _examples:
.. _aiohttp:
.. _requests:
.. _urllib3:
.. _urllib:
.. _http.client:
.. _pycurl:
.. _documentation:
.. _FAQ:
.. _how it works:
.. _mocket:

.. |Build Status| image::
.. |PyPI| image::
.. |Coverage Status| image::
.. |Documentation Status| image::
.. |Quality| image::
:alt: Code Climate
.. |Stability| image::
:alt: Stability
.. |Versions| image::
:alt: Python Versions


v0.2.5 / 2017-10-19

* refactor(setup): remove extra install dependency
* Fix py27 compatibility (#49)
* Add activate_async decorator (#48)
* fix typo in pook.mock.Mock.ismatched.__doc__ (#47)
* fix README example (#46)

v0.2.4 / 2017-10-03

* fix(#45): regex URL issue
* fix(travis): allow failures in pypy
* feat(docs): add sponsor banner
* refactor(History): normalize style

v0.2.3 / 2017-04-28

* feat(docs): add supported version for aiohttp
* Merge branch 'master' of
* fix(api): export missing symbol "disable_network"
* Update README.rst (#43)

v0.2.2 / 2017-04-03

* refactor(compare): disable maxDiff length limit while comparing values

v0.2.1 / 2017-03-25

* fix(engine): enable new mock engine on register if needed
* fix(engine): remove activate argument before instantiating the Mock

v0.2.0 / 2017-03-18

* refactor(engine): do not activate engine on mock declaration if not explicitly requested. This introduces a behavioral library change: you must explicitly use ``pook.on()`` to enable `pook` mock engine.

v0.1.14 / 2017-03-17

* feat(docs): list supported HTTP client versions
* fix(#41): disable mocks after decorator call invokation
* feat(examples): add mock context manager example file
* feat(#40): support context manager definitions
* feat(#39): improve unmatched request output
* feat(docs): add mocket example file
* feat(#33): add mocket examples and documentation

v0.1.13 / 2017-01-29

* fix(api): `mock.calls` property should be an `int`.

v0.1.12 / 2017-01-28

* feat(#33): proxy mock definitions into mock.Request
* refactor(api): `pook.unmatched_requests()` now returns a `list` instead of a lazy `tuple`.

v0.1.11 / 2017-01-14

* refactor(query)
* fix(#37): fix URL comparison
* fix(#38): proper mock engine interface validation.

v0.1.10 / 2017-01-13

* fix(#37): decode byte bodies
* feat( add author email

v0.1.9 / 2017-01-06

* fix(Makefile): remove proper egg file
* feat(package): add wheel package distribution support
* feat(docs): add documentation links

v0.1.8 / 2016-12-24

* fix(assertion): extract regex pattern only when required
* feat(examples): add regular expression example

v0.1.7 / 2016-12-18

* feat(#33): add support for user defined custom mock engine

v0.1.6 / 2016-12-14

* fix( force utf-8 encoding
* feat( add encoding header
* feat(api): add debug mode
* refactor(docs): minor enhancements
* refactor(tests): update URL matcher test cases
* refactor(docs): add note about HTTP clients and update features list
* fix( remove encoding param
* fix(tests): use strict equality assertion

0.1.5 / 2016-12-12

* fix(matchers): fix matching issue in URL.
* refactor(assertion): regex expression based matching must be explicitly enabled.
* feat(tests): add initial matchers tests.

0.1.4 / 2016-12-08

* refactor(README): minor changes
* fix( lint error
* fix(#32): use explicit encoding while reading files in

0.1.3 / 2016-12-08

* fix(core): several bug fixes.
* feat(core): add pending features and major refactors.
* feat(matchers): use ``unittest.TestCase`` matching engine by default.

0.1.2 / 2016-12-01

* fix(matchers): runtime missing variable.

0.1.1 / 2016-12-01

* fix: Python 2 dictionary iteration syntax.
* feat(docs): add more examples.
* fix(matchers): better regular expression comparison support.

0.1.0 / 2016-11-30

* First version (still beta)

0.1.0-rc.1 / 2016-11-27

* First release candidate version (still beta)

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