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Socket Mock Framework - for all kinds of socket animals, web-clients included - with gevent/asyncio/SSL support

Project Description

===============
mocket /mɔˈkɛt/
===============

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A socket mock framework
-------------------------
for all kinds of socket *animals*, web-clients included - with gevent/asyncio/SSL support

How to use it
=============
Read these three blog posts if you want to have a big picture of what *Mocket* is capable of:

- https://medium.com/p/mocket-is-alive-and-is-fighting-with-us-b2810d52597a
- https://hackernoon.com/make-development-great-again-faab769d264e
- https://hackernoon.com/httpretty-now-supports-asyncio-e310814704c6

The starting point to understand how to use *Mocket* to write a custom mock is the following example:

- https://github.com/mindflayer/mocketoy

As next step, you are invited to have a look at both the implementation of the two mocks it provides:

- HTTP mock (similar to HTTPretty) - https://github.com/mindflayer/python-mocket/blob/master/mocket/mockhttp.py
- Redis mock (basic implementation) - https://github.com/mindflayer/python-mocket/blob/master/mocket/mockredis.py

Please also have a look at the huge test suite:

- Tests module at https://github.com/mindflayer/python-mocket/tree/master/tests

Installation
============
Using pip::

$ pip install mocket

Issues
============
When opening an **Issue**, please add few lines of code as failing test, or -better- open its relative **Pull request** adding this test to our test suite.

Quick example of its HTTP mock
==============================
Let's create a new virtualenv with all we need::

$ virtualenv example
$ source example/bin/activate
$ pip install pytest requests mocket

As second step, we create an `example.py` file as the following one:

.. code-block:: python

import json

from mocket import mocketize
from mocket.mockhttp import Entry
import requests
import pytest


@pytest.fixture
def response():
return {
"integer": 1,
"string": "asd",
"boolean": False,
}


@mocketize # use its decorator
def test_json(response):
url_to_mock = 'https://testme.org/json'

Entry.single_register(
Entry.GET,
url_to_mock,
body=json.dumps(response),
headers={'content-type': 'application/json'}
)

mocked_response = requests.get(url_to_mock).json()

assert response == mocked_response

# OR use its context manager
from mocket import Mocketizer

def test_json_with_context_manager(response):
url_to_mock = 'https://testme.org/json'

Entry.single_register(
Entry.GET,
url_to_mock,
body=json.dumps(response),
headers={'content-type': 'application/json'}
)

with Mocketizer():
mocked_response = requests.get(url_to_mock).json()

assert response == mocked_response

Let's fire our example test::

$ py.test example.py

HTTPretty compatibility layer
=============================
Mocket HTTP mock can work as *HTTPretty* replacement for many different use cases. Two main features are missing:

- URL entries containing regular expressions;
- response body from functions.
Two features which are against the Zen of Python, at least imho (mindflayer), but of course I am open to call it into question.

Example:

.. code-block:: python

import json

import aiohttp
import asyncio
import async_timeout
from unittest import TestCase

from mocket.plugins.httpretty import HTTPretty, httprettified


class AioHttpEntryTestCase(TestCase):
@httprettified
def test_https_session(self):
url = 'https://httpbin.org/ip'
HTTPretty.register_uri(
HTTPretty.GET,
url,
body=json.dumps(dict(origin='127.0.0.1')),
)

async def main(l):
async with aiohttp.ClientSession(loop=l) as session:
with async_timeout.timeout(3):
async with session.get(url) as get_response:
assert get_response.status == 200
assert await get_response.text() == '{"origin": "127.0.0.1"}'

loop = asyncio.get_event_loop()
loop.set_debug(True)
loop.run_until_complete(main(loop))

What about the other socket animals?
===================================
Using *Mocket* with asyncio based clients::

$ pip install aiohttp

Example:

.. code-block:: python

class AioHttpEntryTestCase(TestCase):
@mocketize
def test_http_session(self):
url = 'http://httpbin.org/ip'
body = "asd" * 100
Entry.single_register(Entry.GET, url, body=body, status=404)
Entry.single_register(Entry.POST, url, body=body*2, status=201)

async def main(l):
async with aiohttp.ClientSession(loop=l) as session:
with async_timeout.timeout(3):
async with session.get(url) as get_response:
assert get_response.status == 404
assert await get_response.text() == body

with async_timeout.timeout(3):
async with session.post(url, data=body * 6) as post_response:
assert post_response.status == 201
assert await post_response.text() == body * 2

loop = asyncio.get_event_loop()
loop.run_until_complete(main(loop))

Works well with others
=======================
Using *Mocket* as pook_ engine::

$ pip install mocket[pook]

.. _pook: https://pypi.python.org/pypi/pook

Example:

.. code-block:: python

import pook
from mocket.plugins.pook_mock_engine import MocketEngine

pook.set_mock_engine(MocketEngine)

pook.on()

url = 'http://twitter.com/api/1/foobar'
status = 404
response_json = {'error': 'foo'}

mock = pook.get(
url,
headers={'content-type': 'application/json'},
reply=status,
response_json=response_json,
)
mock.persist()

requests.get(url)
assert mock.calls == 1

resp = requests.get(url)
assert resp.status_code == status
assert resp.json() == response_json
assert mock.calls == 2

First appearance
================
EuroPython 2013, Florence

- Video: https://www.youtube.com/watch?v=-LvXbl5d02U
- Slides: https://prezi.com/tmuiaugamsti/mocket/
- Slides as PDF: https://ep2013.europython.eu/media/conference/slides/mocket-a-socket-mock-framework.pdf

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