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# Copyright 2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
import subprocess
import tempfile
from portage import os
from portage.tests import TestCase
from portage.util._async.PipeLogger import PipeLogger
from portage.util._async.PopenProcess import PopenProcess
from portage.util._eventloop.global_event_loop import global_event_loop
from _emerge.PipeReader import PipeReader
class PopenPipeTestCase(TestCase):
"""
Test PopenProcess, which can be useful for Jython support, since it
uses the subprocess.Popen instead of os.fork().
"""
_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.
"""
producer = PopenProcess(proc=subprocess.Popen(
["bash", "-c", self._echo_cmd % test_string],
stdout=subprocess.PIPE, stderr=subprocess.STDOUT),
pipe_reader=PipeReader(), scheduler=global_event_loop())
consumer = producer.pipe_reader
consumer.input_files = {"producer" : producer.proc.stdout}
producer.start()
producer.wait()
self.assertEqual(producer.returncode, os.EX_OK)
self.assertEqual(consumer.returncode, os.EX_OK)
return consumer.getvalue().decode('ascii', 'replace')
def _testPipeLogger(self, test_string):
producer = PopenProcess(proc=subprocess.Popen(
["bash", "-c", self._echo_cmd % test_string],
stdout=subprocess.PIPE, stderr=subprocess.STDOUT),
scheduler=global_event_loop())
fd, log_file_path = tempfile.mkstemp()
try:
consumer = PipeLogger(background=True,
input_fd=os.dup(producer.proc.stdout.fileno()),
log_file_path=log_file_path)
# Close the stdout pipe, since we duplicated it, and it
# must be closed in order to avoid a ResourceWarning.
producer.proc.stdout.close()
producer.pipe_reader = consumer
producer.start()
producer.wait()
self.assertEqual(producer.returncode, os.EX_OK)
self.assertEqual(consumer.returncode, os.EX_OK)
with open(log_file_path, 'rb') as f:
content = f.read()
finally:
os.close(fd)
os.unlink(log_file_path)
return content.decode('ascii', 'replace')
def testPopenPipe(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)))
output = self._testPipeLogger(test_string)
self.assertEqual(test_string, output,
"x = %s, len(output) = %s" % (x, len(output)))
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