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"""
Tests for platutils.py
"""
# -----------------------------------------------------------------------------
# Copyright (C) 2008-2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
# -----------------------------------------------------------------------------
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
import sys
import signal
import os
import time
from _thread import interrupt_main # Py 3
import threading
import pytest
from IPython.utils.process import (
find_cmd,
FindCmdError,
arg_split,
system,
getoutput,
getoutputerror,
get_output_error_code,
)
from IPython.utils.capture import capture_output
from IPython.testing import decorators as dec
from IPython.testing import tools as tt
python = os.path.basename(sys.executable)
# -----------------------------------------------------------------------------
# Tests
# -----------------------------------------------------------------------------
@dec.skip_win32
def test_find_cmd_ls():
"""Make sure we can find the full path to ls."""
path = find_cmd("ls")
assert path.endswith("ls")
@dec.skip_if_not_win32
def test_find_cmd_pythonw():
"""Try to find pythonw on Windows."""
path = find_cmd("pythonw")
assert path.lower().endswith("pythonw.exe"), path
def test_find_cmd_fail():
"""Make sure that FindCmdError is raised if we can't find the cmd."""
pytest.raises(FindCmdError, find_cmd, "asdfasdf")
@dec.skip_win32
@pytest.mark.parametrize(
"argstr, argv",
[
("hi", ["hi"]),
("hello there", ["hello", "there"]),
# \u01ce == \N{LATIN SMALL LETTER A WITH CARON}
# Do not use \N because the tests crash with syntax error in
# some cases, for example windows python2.6.
("h\u01cello", ["h\u01cello"]),
('something "with quotes"', ["something", '"with quotes"']),
],
)
def test_arg_split(argstr, argv):
"""Ensure that argument lines are correctly split like in a shell."""
assert arg_split(argstr) == argv
@dec.skip_if_not_win32
@pytest.mark.parametrize(
"argstr,argv",
[
("hi", ["hi"]),
("hello there", ["hello", "there"]),
("h\u01cello", ["h\u01cello"]),
('something "with quotes"', ["something", "with quotes"]),
],
)
def test_arg_split_win32(argstr, argv):
"""Ensure that argument lines are correctly split like in a shell."""
assert arg_split(argstr) == argv
class SubProcessTestCase(tt.TempFileMixin):
def setUp(self):
"""Make a valid python temp file."""
lines = [
"import sys",
"print('on stdout', end='', file=sys.stdout)",
"print('on stderr', end='', file=sys.stderr)",
"sys.stdout.flush()",
"sys.stderr.flush()",
]
self.mktmp("\n".join(lines))
def test_system(self):
status = system(f'{python} "{self.fname}"')
self.assertEqual(status, 0)
def test_system_quotes(self):
status = system('%s -c "import sys"' % python)
self.assertEqual(status, 0)
def assert_interrupts(self, command):
"""
Interrupt a subprocess after a second.
"""
if threading.main_thread() != threading.current_thread():
raise pytest.skip("Can't run this test if not in main thread.")
# Some tests can overwrite SIGINT handler (by using pdb for example),
# which then breaks this test, so just make sure it's operating
# normally.
signal.signal(signal.SIGINT, signal.default_int_handler)
def interrupt():
# Wait for subprocess to start:
time.sleep(0.5)
interrupt_main()
threading.Thread(target=interrupt).start()
start = time.time()
try:
result = command()
except KeyboardInterrupt:
# Success!
pass
end = time.time()
self.assertTrue(
end - start < 2, "Process didn't die quickly: %s" % (end - start)
)
return result
def test_system_interrupt(self):
"""
When interrupted in the way ipykernel interrupts IPython, the
subprocess is interrupted.
"""
def command():
return system('%s -c "import time; time.sleep(5)"' % python)
status = self.assert_interrupts(command)
self.assertNotEqual(
status, 0, f"The process wasn't interrupted. Status: {status}"
)
def test_getoutput(self):
out = getoutput(f'{python} "{self.fname}"')
# we can't rely on the order the line buffered streams are flushed
try:
self.assertEqual(out, "on stderron stdout")
except AssertionError:
self.assertEqual(out, "on stdouton stderr")
def test_getoutput_quoted(self):
out = getoutput('%s -c "print (1)"' % python)
self.assertEqual(out.strip(), "1")
# Invalid quoting on windows
@dec.skip_win32
def test_getoutput_quoted2(self):
out = getoutput("%s -c 'print (1)'" % python)
self.assertEqual(out.strip(), "1")
out = getoutput("%s -c 'print (\"1\")'" % python)
self.assertEqual(out.strip(), "1")
def test_getoutput_error(self):
out, err = getoutputerror(f'{python} "{self.fname}"')
self.assertEqual(out, "on stdout")
self.assertEqual(err, "on stderr")
def test_get_output_error_code(self):
quiet_exit = '%s -c "import sys; sys.exit(1)"' % python
out, err, code = get_output_error_code(quiet_exit)
self.assertEqual(out, "")
self.assertEqual(err, "")
self.assertEqual(code, 1)
out, err, code = get_output_error_code(f'{python} "{self.fname}"')
self.assertEqual(out, "on stdout")
self.assertEqual(err, "on stderr")
self.assertEqual(code, 0)