[Python-checkins]
python/dist/src/Lib/test test_subprocess.py, NONE, 1.1
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effbot at users.sourceforge.net
Tue Oct 12 17:26:30 CEST 2004
Update of /cvsroot/python/python/dist/src/Lib/test
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv24287/Lib/test
Added Files:
test_subprocess.py
Log Message:
Added Peter Astrand's subprocess module.
--- NEW FILE: test_subprocess.py ---
import unittest
from test import test_support
import subprocess
import sys
import signal
import os
import tempfile
import time
mswindows = (sys.platform == "win32")
#
# Depends on the following external programs: Python
#
if mswindows:
SETBINARY = 'import msvcrt; msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY);'
else:
SETBINARY = ''
class ProcessTestCase(unittest.TestCase):
def mkstemp(self):
"""wrapper for mkstemp, calling mktemp if mkstemp is not available"""
if hasattr(tempfile, "mkstemp"):
return tempfile.mkstemp()
else:
fname = tempfile.mktemp()
return os.open(fname, os.O_RDWR|os.O_CREAT), fname
#
# Generic tests
#
def test_call_seq(self):
"""call() function with sequence argument"""
rc = subprocess.call([sys.executable, "-c", "import sys; sys.exit(47)"])
self.assertEqual(rc, 47)
def test_call_kwargs(self):
"""call() function with keyword args"""
newenv = os.environ.copy()
newenv["FRUIT"] = "banana"
rc = subprocess.call([sys.executable, "-c",
'import sys, os;' \
'sys.exit(os.getenv("FRUIT")=="banana")'],
env=newenv)
self.assertEqual(rc, 1)
def test_stdin_none(self):
""".stdin is None when not redirected"""
p = subprocess.Popen([sys.executable, "-c", 'print "banana"'],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
p.wait()
self.assertEqual(p.stdin, None)
def test_stdout_none(self):
""".stdout is None when not redirected"""
p = subprocess.Popen([sys.executable, "-c", 'print "banana"'],
stdin=subprocess.PIPE, stderr=subprocess.PIPE)
p.wait()
self.assertEqual(p.stdout, None)
def test_stderr_none(self):
""".stderr is None when not redirected"""
p = subprocess.Popen([sys.executable, "-c", 'print "banana"'],
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
p.wait()
self.assertEqual(p.stderr, None)
def test_executable(self):
"""executable"""
p = subprocess.Popen(["somethingyoudonthave", "-c", "import sys; sys.exit(47)"],
executable=sys.executable)
p.wait()
self.assertEqual(p.returncode, 47)
def test_stdin_pipe(self):
"""stdin redirection"""
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.exit(sys.stdin.read() == "pear")'],
stdin=subprocess.PIPE)
p.stdin.write("pear")
p.stdin.close()
p.wait()
self.assertEqual(p.returncode, 1)
def test_stdin_filedes(self):
"""stdin is set to open file descriptor"""
tf = tempfile.TemporaryFile()
d = tf.fileno()
os.write(d, "pear")
os.lseek(d, 0, 0)
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.exit(sys.stdin.read() == "pear")'],
stdin=d)
p.wait()
self.assertEqual(p.returncode, 1)
def test_stdin_fileobj(self):
"""stdin is set to open file object"""
tf = tempfile.TemporaryFile()
tf.write("pear")
tf.seek(0)
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.exit(sys.stdin.read() == "pear")'],
stdin=tf)
p.wait()
self.assertEqual(p.returncode, 1)
def test_stdout_pipe(self):
"""stdout redirection"""
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.stdout.write("orange")'],
stdout=subprocess.PIPE)
self.assertEqual(p.stdout.read(), "orange")
def test_stdout_filedes(self):
"""stdout is set to open file descriptor"""
tf = tempfile.TemporaryFile()
d = tf.fileno()
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.stdout.write("orange")'],
stdout=d)
p.wait()
os.lseek(d, 0, 0)
self.assertEqual(os.read(d, 1024), "orange")
def test_stdout_fileobj(self):
"""stdout is set to open file object"""
tf = tempfile.TemporaryFile()
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.stdout.write("orange")'],
stdout=tf)
p.wait()
tf.seek(0)
self.assertEqual(tf.read(), "orange")
def test_stderr_pipe(self):
"""stderr redirection"""
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.stderr.write("strawberry")'],
stderr=subprocess.PIPE)
self.assertEqual(p.stderr.read(), "strawberry")
def test_stderr_filedes(self):
"""stderr is set to open file descriptor"""
tf = tempfile.TemporaryFile()
d = tf.fileno()
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.stderr.write("strawberry")'],
stderr=d)
p.wait()
os.lseek(d, 0, 0)
self.assertEqual(os.read(d, 1024), "strawberry")
def test_stderr_fileobj(self):
"""stderr is set to open file object"""
tf = tempfile.TemporaryFile()
p = subprocess.Popen([sys.executable, "-c",
'import sys; sys.stderr.write("strawberry")'],
stderr=tf)
p.wait()
tf.seek(0)
self.assertEqual(tf.read(), "strawberry")
def test_stdout_stderr_pipe(self):
"""capture stdout and stderr to the same pipe"""
p = subprocess.Popen([sys.executable, "-c",
'import sys;' \
'sys.stdout.write("apple");' \
'sys.stdout.flush();' \
'sys.stderr.write("orange")'],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
self.assertEqual(p.stdout.read(), "appleorange")
def test_stdout_stderr_file(self):
"""capture stdout and stderr to the same open file"""
tf = tempfile.TemporaryFile()
p = subprocess.Popen([sys.executable, "-c",
'import sys;' \
'sys.stdout.write("apple");' \
'sys.stdout.flush();' \
'sys.stderr.write("orange")'],
stdout=tf,
stderr=tf)
p.wait()
tf.seek(0)
self.assertEqual(tf.read(), "appleorange")
def test_cwd(self):
"""cwd"""
tmpdir = os.getenv("TEMP", "/tmp")
tmpdir = os.path.realpath(tmpdir)
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' \
'sys.stdout.write(os.getcwd())'],
stdout=subprocess.PIPE,
cwd=tmpdir)
self.assertEqual(p.stdout.read(), tmpdir)
def test_env(self):
"""env"""
newenv = os.environ.copy()
newenv["FRUIT"] = "orange"
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' \
'sys.stdout.write(os.getenv("FRUIT"))'],
stdout=subprocess.PIPE,
env=newenv)
self.assertEqual(p.stdout.read(), "orange")
def test_communicate(self):
"""communicate()"""
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' \
'sys.stderr.write("pineapple");' \
'sys.stdout.write(sys.stdin.read())'],
stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(stdout, stderr) = p.communicate("banana")
self.assertEqual(stdout, "banana")
self.assertEqual(stderr, "pineapple")
def test_communicate_returns(self):
"""communicate() should return None if no redirection is active"""
p = subprocess.Popen([sys.executable, "-c", "import sys; sys.exit(47)"])
(stdout, stderr) = p.communicate()
self.assertEqual(stdout, None)
self.assertEqual(stderr, None)
def test_communicate_pipe_buf(self):
"""communicate() with writes larger than pipe_buf"""
# This test will probably deadlock rather than fail, if
# communicate() does not work properly.
x, y = os.pipe()
if mswindows:
pipe_buf = 512
else:
pipe_buf = os.fpathconf(x, "PC_PIPE_BUF")
os.close(x)
os.close(y)
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;'
'sys.stdout.write(sys.stdin.read(47));' \
'sys.stderr.write("xyz"*%d);' \
'sys.stdout.write(sys.stdin.read())' % pipe_buf],
stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
string_to_write = "abc"*pipe_buf
(stdout, stderr) = p.communicate(string_to_write)
self.assertEqual(stdout, string_to_write)
def test_writes_before_communicate(self):
"""stdin.write before communicate()"""
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' \
'sys.stdout.write(sys.stdin.read())'],
stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
p.stdin.write("banana")
(stdout, stderr) = p.communicate("split")
self.assertEqual(stdout, "bananasplit")
self.assertEqual(stderr, "")
def test_universal_newlines(self):
"""universal newlines"""
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' + SETBINARY + \
'sys.stdout.write("line1\\n");' \
'sys.stdout.flush();' \
'sys.stdout.write("line2\\r");' \
'sys.stdout.flush();' \
'sys.stdout.write("line3\\r\\n");' \
'sys.stdout.flush();' \
'sys.stdout.write("line4\\r");' \
'sys.stdout.flush();' \
'sys.stdout.write("\\nline5");'
'sys.stdout.flush();' \
'sys.stdout.write("\\nline6");'],
stdout=subprocess.PIPE,
universal_newlines=1)
stdout = p.stdout.read()
if hasattr(open, 'newlines'):
# Interpreter with universal newline support
self.assertEqual(stdout, "line1\nline2\nline3\nline4\nline5\nline6")
else:
# Interpreter without universal newline support
self.assertEqual(stdout, "line1\nline2\rline3\r\nline4\r\nline5\nline6")
def test_universal_newlines_communicate(self):
"""universal newlines through communicate()"""
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' + SETBINARY + \
'sys.stdout.write("line1\\n");' \
'sys.stdout.flush();' \
'sys.stdout.write("line2\\r");' \
'sys.stdout.flush();' \
'sys.stdout.write("line3\\r\\n");' \
'sys.stdout.flush();' \
'sys.stdout.write("line4\\r");' \
'sys.stdout.flush();' \
'sys.stdout.write("\\nline5");'
'sys.stdout.flush();' \
'sys.stdout.write("\\nline6");'],
stdout=subprocess.PIPE, stderr=subprocess.PIPE,
universal_newlines=1)
(stdout, stderr) = p.communicate()
if hasattr(open, 'newlines'):
# Interpreter with universal newline support
self.assertEqual(stdout, "line1\nline2\nline3\nline4\nline5\nline6")
else:
# Interpreter without universal newline support
self.assertEqual(stdout, "line1\nline2\rline3\r\nline4\r\nline5\nline6")
def test_no_leaking(self):
"""Make sure we leak no resources"""
for i in range(1026):
p = subprocess.Popen([sys.executable, "-c", "import sys;sys.stdout.write(sys.stdin.read())"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
data = p.communicate("lime")[0]
self.assertEqual(data, "lime")
def test_list2cmdline(self):
"""list2cmdline"""
self.assertEqual(subprocess.list2cmdline(['a b c', 'd', 'e']),
'"a b c" d e')
self.assertEqual(subprocess.list2cmdline(['ab"c', '\\', 'd']),
'ab\\"c \\ d')
self.assertEqual(subprocess.list2cmdline(['a\\\\\\b', 'de fg', 'h']),
'a\\\\\\b "de fg" h')
self.assertEqual(subprocess.list2cmdline(['a\\"b', 'c', 'd']),
'a\\\\\\"b c d')
self.assertEqual(subprocess.list2cmdline(['a\\\\b c', 'd', 'e']),
'"a\\\\b c" d e')
self.assertEqual(subprocess.list2cmdline(['a\\\\b\\ c', 'd', 'e']),
'"a\\\\b\\ c" d e')
def test_poll(self):
"""poll"""
p = subprocess.Popen([sys.executable,
"-c", "import time; time.sleep(4)"])
while p.poll() == None:
sys.stdout.write(".")
sys.stdout.flush()
time.sleep(0.5)
# Subsequent invocations should just return the returncode
self.assertEqual(p.poll(), 0)
def test_wait(self):
"""wait"""
p = subprocess.Popen([sys.executable,
"-c", "import time; time.sleep(2)"])
self.assertEqual(p.wait(), 0)
# Subsequent invocations should just return the returncode
self.assertEqual(p.wait(), 0)
#
# POSIX tests
#
if not mswindows:
def test_exceptions(self):
"""catched & re-raised exceptions"""
try:
p = subprocess.Popen([sys.executable, "-c", ""],
cwd="/this/path/does/not/exist")
except OSError, e:
# The attribute child_traceback should contain "os.chdir"
# somewhere.
self.assertNotEqual(e.child_traceback.find("os.chdir"), -1)
else:
self.fail("Expected OSError")
def test_run_abort(self):
"""returncode handles signal termination"""
p = subprocess.Popen([sys.executable, "-c", "import os; os.abort()"])
p.wait()
self.assertEqual(-p.returncode, signal.SIGABRT)
def test_preexec(self):
"""preexec function"""
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' \
'sys.stdout.write(os.getenv("FRUIT"))'],
stdout=subprocess.PIPE,
preexec_fn=lambda: os.putenv("FRUIT", "apple"))
self.assertEqual(p.stdout.read(), "apple")
def test_close_fds(self):
"""close_fds"""
# Make sure we have some fds open
os.pipe()
p = subprocess.Popen([sys.executable, "-c",
'import sys,os;' \
'sys.stdout.write(str(os.dup(0)))'],
stdout=subprocess.PIPE, close_fds=1)
# When all fds are closed, the next free fd should be 3.
self.assertEqual(p.stdout.read(), "3")
def test_args_string(self):
"""args is a string"""
f, fname = self.mkstemp()
os.write(f, "#!/bin/sh\n")
os.write(f, "exec %s -c 'import sys; sys.exit(47)'\n" % sys.executable)
os.close(f)
os.chmod(fname, 0700)
p = subprocess.Popen(fname)
p.wait()
self.assertEqual(p.returncode, 47)
os.remove(fname)
def test_invalid_args(self):
"""invalid arguments should raise ValueError"""
self.assertRaises(ValueError, subprocess.call,
[sys.executable, "-c", "import sys; sys.exit(47)"],
startupinfo=47)
self.assertRaises(ValueError, subprocess.call,
[sys.executable, "-c", "import sys; sys.exit(47)"],
creationflags=47)
def test_shell_sequence(self):
"""Run command through the shell (sequence)"""
newenv = os.environ.copy()
newenv["FRUIT"] = "apple"
p = subprocess.Popen(["echo $FRUIT"], shell=1,
stdout=subprocess.PIPE,
env=newenv)
self.assertEqual(p.stdout.read().strip(), "apple")
def test_shell_string(self):
"""Run command through the shell (string)"""
newenv = os.environ.copy()
newenv["FRUIT"] = "apple"
p = subprocess.Popen("echo $FRUIT", shell=1,
stdout=subprocess.PIPE,
env=newenv)
self.assertEqual(p.stdout.read().strip(), "apple")
def test_call_string(self):
"""call() function with string argument on UNIX"""
f, fname = self.mkstemp()
os.write(f, "#!/bin/sh\n")
os.write(f, "exec %s -c 'import sys; sys.exit(47)'\n" % sys.executable)
os.close(f)
os.chmod(fname, 0700)
rc = subprocess.call(fname)
self.assertEqual(rc, 47)
#
# Windows tests
#
if mswindows:
def test_startupinfo(self):
"""startupinfo argument"""
# We uses hardcoded constants, because we do not want to
# depend on win32all.
STARTF_USESHOWWINDOW = 1
SW_MAXIMIZE = 3
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags = STARTF_USESHOWWINDOW
startupinfo.wShowWindow = SW_MAXIMIZE
# Since Python is a console process, it won't be affected
# by wShowWindow, but the argument should be silently
# ignored
subprocess.call([sys.executable, "-c", "import sys; sys.exit(0)"],
startupinfo=startupinfo)
def test_creationflags(self):
"""creationflags argument"""
CREATE_NEW_CONSOLE = 16
subprocess.call(sys.executable + ' -c "import time; time.sleep(2)"',
creationflags=CREATE_NEW_CONSOLE)
def test_invalid_args(self):
"""invalid arguments should raise ValueError"""
self.assertRaises(ValueError, subprocess.call,
[sys.executable, "-c", "import sys; sys.exit(47)"],
preexec_fn=lambda: 1)
self.assertRaises(ValueError, subprocess.call,
[sys.executable, "-c", "import sys; sys.exit(47)"],
close_fds=True)
def test_shell_sequence(self):
"""Run command through the shell (sequence)"""
newenv = os.environ.copy()
newenv["FRUIT"] = "physalis"
p = subprocess.Popen(["set"], shell=1,
stdout=subprocess.PIPE,
env=newenv)
self.assertNotEqual(p.stdout.read().find("physalis"), -1)
def test_shell_string(self):
"""Run command through the shell (string)"""
newenv = os.environ.copy()
newenv["FRUIT"] = "physalis"
p = subprocess.Popen("set", shell=1,
stdout=subprocess.PIPE,
env=newenv)
self.assertNotEqual(p.stdout.read().find("physalis"), -1)
def test_call_string(self):
"""call() function with string argument on Windows"""
rc = subprocess.call(sys.executable + ' -c "import sys; sys.exit(47)"')
self.assertEqual(rc, 47)
def test_main():
test_support.run_unittest(ProcessTestCase)
if __name__ == "__main__":
test_main()
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