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# Copyright 1998-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
from portage import os
from portage.tests import TestCase
from portage.util._pty import _create_pty_or_pipe
from _emerge.PollScheduler import PollScheduler
from _emerge.PipeReader import PipeReader
from _emerge.SpawnProcess import SpawnProcess
class PipeReaderTestCase(TestCase):
def _testPipeReader(self, test_string, use_pty):
"""
Use a poll loop to read data from a pipe and assert that
the data written to the pipe is identical to the data
read from the pipe.
"""
scheduler = PollScheduler().sched_iface
if use_pty:
got_pty, master_fd, slave_fd = _create_pty_or_pipe()
else:
got_pty = False
master_fd, slave_fd = os.pipe()
master_file = os.fdopen(master_fd, 'rb', 0)
slave_file = os.fdopen(slave_fd, 'wb', 0)
producer = SpawnProcess(
args=["bash", "-c", "echo -n '%s'" % test_string],
env=os.environ, fd_pipes={1:slave_fd},
scheduler=scheduler)
producer.start()
slave_file.close()
consumer = PipeReader(
input_files={"producer" : master_file},
scheduler=scheduler)
consumer.start()
# This will ensure that both tasks have exited, which
# is necessary to avoid "ResourceWarning: unclosed file"
# warnings since Python 3.2 (and also ensures that we
# don't leave any zombie child processes).
scheduler.schedule()
self.assertEqual(producer.returncode, os.EX_OK)
self.assertEqual(consumer.returncode, os.EX_OK)
output = consumer.getvalue().decode('ascii', 'replace')
return (output, got_pty)
def testPipeReader(self):
for use_pty in (False, True):
for x in (1, 2, 5, 6, 7, 8, 2**5, 2**10, 2**12, 2**13, 2**14):
test_string = x * "a"
output, got_pty = self._testPipeReader(test_string, use_pty)
self.assertEqual(test_string, output,
"x = %s, use_pty = %s, got_pty = %s" % (x, use_pty, got_pty))
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