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//usr/lib/python2.4/test/test_popen.py
#! /usr/bin/env python2.4 """Basic tests for os.popen() Particularly useful for platforms that fake popen. """ import os import sys from test.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. python = sys.executable if ' ' in python: python = '"' + python + '"' # quote embedded space for cmdline def _do_test_commandline(cmdline, expected): cmd = '%s -c "import sys;print sys.argv" %s' % (python, 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()