Hi,
During development, web frameworks often spawn a subprocess to serve
requests so that they can reload the code if it changes. You might be
measuring only the first process, and not the spawned process that is
actually doing the work.
--Ned.
On 1/22/22 10:42 AM, Skip Montanaro wrote:
I have a simple little Flask app and created a suitably simple test
script, aimed at making sure I covered much of the executable code. It
fires up the app with coverage enabled and hits it with a bunch of
requests, then exits. When testing, I have coverage enabled:
CMD="$(which flask) run -h localhost -p $PORT"
if [ "x$DOCOVER" = "xtrue" ] ; then
coverage run -a $CMD
else
$CMD
fi
Coverage seems to do the right thing, creating a .coverage file on
exit, and when I run the annotate, report, or html commands it does
the right thing. Still, it never actually marks any statements within
functions as having been executed. Here's coverage from a manual run
where I poked the server with three debug endpoints:
> if FLASK_DEBUG:
> @app.route("/env")
> def printenv():
! return jsonify(dict(os.environ))
> @app.route('/api/help')
> def app_help():
> """Print available functions."""
! func_list = {}
! for rule in app.url_map.iter_rules():
! if rule.endpoint != 'static':
! func_list[rule.rule] =
str(app.view_functions[rule.endpoint])
! return jsonify(func_list)
> @app.get('/shutdown')
> def shutdown():
! func = request.environ.get('werkzeug.server.shutdown')
! if func is None:
! raise RuntimeError('Not running with the Werkzeug Server')
! func()
! return 'Server shutting down...\n'
Clearly, coverage noticed the action which happened during import, but
despite the fact that I really did request /env, /api/help, and
/shutdown, it never thought any of them were called.
Any idea what I'm missing?
Thx,
Skip Montanaro
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