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# encoding: utf-8
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"""
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Test process execution and IO redirection.
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"""
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__docformat__ = "restructuredtext en"
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is
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# in the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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from cStringIO import StringIO
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from time import sleep
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import sys
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from IPython.frontend.process import PipedProcess
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from IPython.testing import decorators as dec
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def test_capture_out():
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""" A simple test to see if we can execute a process and get the output.
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"""
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s = StringIO()
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p = PipedProcess('echo 1', out_callback=s.write, )
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p.start()
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p.join()
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result = s.getvalue().rstrip()
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assert result == '1'
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def test_io():
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""" Checks that we can send characters on stdin to the process.
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"""
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s = StringIO()
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p = PipedProcess(sys.executable + ' -c "a = raw_input(); print a"',
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out_callback=s.write, )
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p.start()
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test_string = '12345\n'
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while not hasattr(p, 'process'):
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sleep(0.1)
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p.process.stdin.write(test_string)
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p.join()
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result = s.getvalue()
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assert result == test_string
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@dec.skip_win32
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def test_kill():
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""" Check that we can kill a process, and its subprocess.
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"""
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s = StringIO()
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p = PipedProcess(sys.executable + ' -c "a = raw_input();"',
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out_callback=s.write, )
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p.start()
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while not hasattr(p, 'process'):
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sleep(0.1)
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p.process.kill()
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assert p.process.poll() is not None
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if __name__ == '__main__':
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test_capture_out()
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test_io()
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test_kill()
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