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#! /usr/bin/env python
"""Test script for popen2.py
Christian Tismer
"""
import os
# popen2 contains its own testing routine
# which is especially useful to see if open files
# like stdin can be read successfully by a forked
# subprocess.
def main():
print "Test popen2 module:"
try:
from os import popen
except ImportError:
# if we don't have os.popen, check that
# we have os.fork. if not, skip the test
# (by raising an ImportError)
from os import fork
import popen2
popen2._test()
def _test():
# same test as popen2._test(), but using the os.popen*() API
print "Testing os module:"
import popen2
cmd = "cat"
teststr = "abc\n"
resultstr = teststr
if os.name == "nt":
cmd = "more"
resultstr = "\n" + resultstr
print "testing popen2..."
w, r = os.popen2(cmd)
w.write(teststr)
w.close()
assert r.read() == resultstr
print "testing popen3..."
try:
w, r, e = os.popen3([cmd])
except:
w, r, e = os.popen3(cmd)
w.write(teststr)
w.close()
assert r.read() == resultstr
assert e.read() == ""
for inst in popen2._active[:]:
inst.wait()
assert not popen2._active
print "All OK"
main()
_test()
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