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python: make sure spot.automata() terminates the command

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Fixes #341.

* python/spot/__init__.py (automata): Rewrite and simplify using
the subprocess context manager.
* tests/python/341.py: New file.
* tests/Makefile.am: Add it.
* NEWS: Mention the issue.
This commit is contained in:
Alexandre Duret-Lutz 2018-04-03 15:12:58 +02:00
parent 6afc2d45e0
commit cbfbf53617
4 changed files with 62 additions and 19 deletions
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3
tests/Makefile.am
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@ -351,10 +351,10 @@ TESTS_ipython = \
# do not consider part of the documentation: those have to start
# with a _.
TESTS_python = \
python/341.py \
python/_altscc.ipynb \
python/_autparserr.ipynb \
python/_aux.ipynb \
python/_word.ipynb \
python/accparse2.py \
python/alarm.py \
python/alternating.py \
@ -362,6 +362,7 @@ TESTS_python = \
python/bddnqueen.py \
python/bugdet.py \
python/declenv.py \
python/_word.ipynb \
python/decompose_scc.py \
python/dualize.py \
python/except.py \

35
tests/python/341.py Normal file
View file

@ -0,0 +1,35 @@
# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2017 Laboratoire de Recherche et Développement de l'Epita
# (LRDE).
#
# This file is part of Spot, a model checking library.
#
# Spot is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Spot is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import spot
from subprocess import _active
def two_intersecting_automata():
"""return two random automata with a non-empty intersection"""
g = spot.automata('randaut -A4 -Q5 -n-1 2 |')
for a, b in zip(g, g):
if a.intersects(b):
return a, b
for i in range(5):
two_intersecting_automata()
n = len(_active)
print(n, "active processes")
assert(n == 0);