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# encoding: utf-8
"""
Test process execution and IO redirection.
"""
__docformat__ = "restructuredtext en"
#-----------------------------------------------------------------------------
# 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.
#-----------------------------------------------------------------------------
from cStringIO import StringIO
from time import sleep
import sys
from IPython.frontend.process import PipedProcess
from IPython.testing import decorators as dec
def test_capture_out():
""" A simple test to see if we can execute a process and get the output.
"""
s = StringIO()
p = PipedProcess('echo 1', out_callback=s.write, )
p.start()
p.join()
result = s.getvalue().rstrip()
assert result == '1'
def test_io():
""" Checks that we can send characters on stdin to the process.
"""
s = StringIO()
p = PipedProcess(sys.executable + ' -c "a = raw_input(); print a"',
out_callback=s.write, )
p.start()
test_string = '12345\n'
while not hasattr(p, 'process'):
sleep(0.1)
p.process.stdin.write(test_string)
p.join()
result = s.getvalue()
assert result == test_string
@dec.skip_win32
def test_kill():
""" Check that we can kill a process, and its subprocess.
"""
s = StringIO()
p = PipedProcess(sys.executable + ' -c "a = raw_input();"',
out_callback=s.write, )
p.start()
while not hasattr(p, 'process'):
sleep(0.1)
p.process.kill()
assert p.process.poll() is not None
if __name__ == '__main__':
test_capture_out()
test_io()
test_kill()
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