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# Copyright 1998-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
import sys
from portage import os
from portage.tests import TestCase
from _emerge.TaskScheduler import TaskScheduler
from _emerge.PipeReader import PipeReader
from _emerge.SpawnProcess import SpawnProcess
class PipeReaderTestCase(TestCase):
def _create_pipe(self):
return os.pipe()
def _assertEqual(self, test_string, consumer_value):
self.assertEqual(test_string, consumer_value)
def testPipeReader(self):
"""
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.
"""
test_string = 2 * "blah blah blah\n"
master_fd, slave_fd = self._create_pipe()
master_file = os.fdopen(master_fd, 'rb')
task_scheduler = TaskScheduler(max_jobs=2)
scheduler = task_scheduler.sched_iface
class Producer(SpawnProcess):
def _spawn(self, args, **kwargs):
rval = SpawnProcess._spawn(self, args, **kwargs)
os.close(kwargs['fd_pipes'][1])
return rval
producer = Producer(
args=["bash", "-c", "echo -n '%s'" % test_string],
fd_pipes={1:slave_fd}, scheduler=scheduler)
consumer = PipeReader(
input_files={"producer" : master_file},
scheduler=scheduler)
task_scheduler.add(producer)
task_scheduler.add(consumer)
task_scheduler.run()
if sys.hexversion >= 0x3000000:
test_string = test_string.encode()
self._assertEqual(test_string, consumer.getvalue())
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