Live and Let Die
Live and Let Die simplifies launching and terminating of web development servers from BDD or functional tests. I have created it for functional testing of the Authomatic package.
The package Currently supports Google App engine, Django, Flask and wsgiref.simple_server. Support for other frameworks will hopefully be added in future.
Usage
You first need to make instance of one of the framework classes.
Django
import liveandletdie
# Django
app = liveandletdie.Django('path/to/django/project/',
host='0.0.0.0',
port=5555)Google App Engine
import liveandletdie
app = liveandletdie.GAE('path/to/dev_appserver.py',
'path/to/gae/app/dir', # containing app.yaml file
host='0.0.0.0',
port=5555)Flask
By Flask you must wrap the WSGI application in
liveandletdie.Flask.wrap(app).
If you set the ssl keyword argument to True, the app will be run with
ssl_context="adhoc" and the schema of the self.check_url
will be "https".
Note
If you are struggling with installation of
pyOpenSSL on OSX due to
'ffi.h' file not found error during installation of the
cryptography
dependency, try the solution from this
Stackoverflow question:
$ brew install pkg-config libffi
$ export PKG_CONFIG_PATH=/usr/local/Cellar/libffi/3.0.13/lib/pkgconfig/
$ pip install pyopenssl# flask/app/main.py
from flask import Flask
DEBUG = True
SECRET_KEY = 'development key'
USERNAME = 'admin'
PASSWORD = 'default'
app = Flask(__name__)
app.config.from_object(__name__)
@app.route('/')
def home():
return 'Hello World!'
if __name__ == '__main__':
# This does nothing unless you run this module with --liveandletdie flag.
import liveandletdie
liveandletdie.Flask.wrap(app)
app.run()import liveandletdie
app = liveandletdie.Flask('path/to/flask/app/main.py',
host='0.0.0.0',
port=5555)Pyramid (wsgiref.simple_server)
By wsgiref.simple_server you must wrap the WSGI application in
liveandletdie.WsgirefSimpleServer.wrap(app).
If you set the ssl keyword argument to True, the app will be run with
a self-signed certificate, and the schema of the self.check_url
will be "https".
# pyramid/app/main.py
from wsgiref.simple_server import make_server
from pyramid.config import Configurator
from pyramid.response import Response
def home(request):
return Response('Hello World!')
if __name__ == '__main__':
config = Configurator()
config.add_route('home', '/')
config.add_view(home, route_name='home')
app = config.make_wsgi_app()
# This does nothing unless you run this module with --liveandletdie flag.
import liveandletdie
liveandletdie.WsgirefSimpleServer.wrap(app)
server = make_server('127.0.0.1', 8080, app)
server.serve_forever()import liveandletdie
app = liveandletdie.Flask('path/to/pyramid/app/main.py',
host='0.0.0.0',
port=5555)Using the App instance
The interface is the same for all of the supported frameworks.
# Start the app.
# If kill_port is True,
# it will kill any process listening on port 5555
process = app.live(kill_port=True)
# You can check whether it is running
is_running = app.check()
# Stop it
app.die()Simple UnitTest example: https://github.com/peterhudec/liveandletdie/blob/master/test_examples/unittest_example/tests.py
Simple PyTest example: https://github.com/peterhudec/liveandletdie/blob/master/test_examples/pytest_example/tests.py
Simple Lettuce example: https://github.com/peterhudec/liveandletdie/blob/master/test_examples/lettuce_example/tests.py
Debugging
If an app refuses to start on the app.live() call, it throws a
LiveAndLetDieError with a message:
Flask server https://127.0.0.1:5555 didn't start in specified timeout 10.0 seconds! command: python sample_apps/flask/main.py --liveandletdie 127.0.0.1:5555
To find out more about why the app didn't start run the command provided in the error message manually:
$ python sample_apps/flask/main.py --liveandletdie 127.0.0.1:5555Developers
Clone:
$ git clone https://github.com/peterhudec/liveandletdie.git
Bootstrap the development environment.
This will create the ./venv virtual environment in the project root.
$ sh bootstrap.sh
Run tests:
$ sh run-all.sh
Or bootstrap and run tests in one step:
$ sh bootstrap-and-test.sh
Enjoy!
