[Python-checkins] CVS: python/dist/src/Lib/test test_popen.py,NONE,1.1

[Mark Hammond]

Update of /cvsroot/python/python/dist/src/Lib/test
In directory usw-pr-cvs1:/tmp/cvs-serv27599/Lib/test

Added Files:
	test_popen.py 
Log Message:
Fix bugs:
 457466: popenx() argument mangling hangs python
 226766: popen('python -c"...."') tends to hang

Fixes argument quoting in w9xpopen.exe for Windows 9x.  w9xpopen.exe
also never attempts to display a MessageBox when not executed
interactively.

Added test_popen() test.  This test currently just executes 
"python -c ..." as a child process, and checks that the expected
arguments were all recieved correctly by the child process.  This
test succeeds for me on Win9x, win2k and Linux, and I hope it does
for other popen supported platforms too :)


--- NEW FILE: test_popen.py ---
#! /usr/bin/env python
"""Basic tests for os.popen()

  Particularly useful for platforms that fake popen.
"""

import os
import sys
from test_support import TestSkipped
from os import popen

# Test that command-lines get down as we expect.
# To do this we execute:
#    python -c "import sys;print sys.argv" {rest_of_commandline}
# This results in Python being spawned and printing the sys.argv list.
# We can then eval() the result of this, and see what each argv was.
def _do_test_commandline(cmdline, expected):
    cmd = 'python -c "import sys;print sys.argv" %s' % (cmdline,)
    data = popen(cmd).read()
    got = eval(data)[1:] # strip off argv[0]
    if got != expected:
        print "Error in popen commandline handling."
        print " executed '%s', expected '%r', but got '%r'" \
                                                    % (cmdline, expected, got)

def _test_commandline():
    _do_test_commandline("foo bar", ["foo", "bar"])
    _do_test_commandline('foo "spam and eggs" "silly walk"', ["foo", "spam and eggs", "silly walk"])
    _do_test_commandline('foo "a \\"quoted\\" arg" bar', ["foo", 'a "quoted" arg', "bar"])
    print "popen seemed to process the command-line correctly"

def main():
    print "Test popen:"
    _test_commandline()

main()