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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):
_use_array = False
_use_pty = False
_echo_cmd = "echo -n '%s'"
def _testPipeReader(self, test_string):
"""
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.
"""
if self._use_pty:
got_pty, master_fd, slave_fd = _create_pty_or_pipe()
if not got_pty:
os.close(slave_fd)
os.close(master_fd)
skip_reason = "pty not acquired"
self.portage_skip = skip_reason
self.fail(skip_reason)
return
else:
master_fd, slave_fd = os.pipe()
# WARNING: It is very important to use unbuffered mode here,
# in order to avoid issue 5380 with python3.
master_file = os.fdopen(master_fd, 'rb', 0)
slave_file = os.fdopen(slave_fd, 'wb', 0)
scheduler = PollScheduler().sched_iface
producer = SpawnProcess(
args=["bash", "-c", self._echo_cmd % 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, _use_array=self._use_array)
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)
return consumer.getvalue().decode('ascii', 'replace')
def testPipeReader(self):
for x in (1, 2, 5, 6, 7, 8, 2**5, 2**10, 2**12, 2**13, 2**14):
test_string = x * "a"
output = self._testPipeReader(test_string)
self.assertEqual(test_string, output,
"x = %s, len(output) = %s" % (x, len(output)))
class PipeReaderPtyTestCase(PipeReaderTestCase):
_use_pty = True
class PipeReaderArrayTestCase(PipeReaderTestCase):
_use_array = True
# sleep allows reliable triggering of the failure mode on fast computers
_echo_cmd = "sleep 0.1 ; echo -n '%s'"
def __init__(self, *args, **kwargs):
super(PipeReaderArrayTestCase, self).__init__(*args, **kwargs)
# http://bugs.python.org/issue5380
# https://bugs.pypy.org/issue956
self.todo = True
class PipeReaderPtyArrayTestCase(PipeReaderArrayTestCase):
_use_pty = True
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