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98 lines
3.1 KiB
Python
98 lines
3.1 KiB
Python
#! /usr/bin/env python
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"""Test script for popen2.py"""
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import warnings
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warnings.filterwarnings("ignore", ".*popen2 module is deprecated.*",
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DeprecationWarning)
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warnings.filterwarnings("ignore", "os\.popen. is deprecated.*",
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DeprecationWarning)
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import os
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import sys
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import unittest
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import popen2
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from test.test_support import TestSkipped, run_unittest, reap_children
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if sys.platform[:4] == 'beos' or sys.platform[:6] == 'atheos':
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# Locks get messed up or something. Generally we're supposed
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# to avoid mixing "posix" fork & exec with native threads, and
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# they may be right about that after all.
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raise TestSkipped("popen2() doesn't work on " + sys.platform)
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# if we don't have os.popen, check that
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# we have os.fork. if not, skip the test
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# (by raising an ImportError)
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try:
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from os import popen
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del popen
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except ImportError:
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from os import fork
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del fork
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class Popen2Test(unittest.TestCase):
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cmd = "cat"
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if os.name == "nt":
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cmd = "more"
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teststr = "ab cd\n"
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# "more" doesn't act the same way across Windows flavors,
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# sometimes adding an extra newline at the start or the
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# end. So we strip whitespace off both ends for comparison.
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expected = teststr.strip()
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def setUp(self):
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popen2._cleanup()
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# When the test runs, there shouldn't be any open pipes
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self.assertFalse(popen2._active, "Active pipes when test starts" +
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repr([c.cmd for c in popen2._active]))
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def tearDown(self):
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for inst in popen2._active:
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inst.wait()
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popen2._cleanup()
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self.assertFalse(popen2._active, "_active not empty")
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reap_children()
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def validate_output(self, teststr, expected_out, r, w, e=None):
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w.write(teststr)
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w.close()
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got = r.read()
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self.assertEquals(expected_out, got.strip(), "wrote %r read %r" %
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(teststr, got))
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if e is not None:
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got = e.read()
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self.assertFalse(got, "unexpected %r on stderr" % got)
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def test_popen2(self):
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r, w = popen2.popen2(self.cmd)
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self.validate_output(self.teststr, self.expected, r, w)
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def test_popen3(self):
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if os.name == 'posix':
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r, w, e = popen2.popen3([self.cmd])
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self.validate_output(self.teststr, self.expected, r, w, e)
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r, w, e = popen2.popen3(self.cmd)
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self.validate_output(self.teststr, self.expected, r, w, e)
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def test_os_popen2(self):
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# same test as test_popen2(), but using the os.popen*() API
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w, r = os.popen2(self.cmd)
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self.validate_output(self.teststr, self.expected, r, w)
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def test_os_popen3(self):
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# same test as test_popen3(), but using the os.popen*() API
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if os.name == 'posix':
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w, r, e = os.popen3([self.cmd])
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self.validate_output(self.teststr, self.expected, r, w, e)
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w, r, e = os.popen3(self.cmd)
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self.validate_output(self.teststr, self.expected, r, w, e)
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def test_main():
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run_unittest(Popen2Test)
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if __name__ == "__main__":
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test_main()
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