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# Copyright 2012-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
import subprocess
from portage import os
from portage.tests import TestCase
from portage.util._async.PopenProcess import PopenProcess
from portage.util._eventloop.global_event_loop import global_event_loop
from portage.util._async.PipeReaderBlockingIO import PipeReaderBlockingIO
class PopenPipeBlockingIOTestCase(TestCase):
"""
Test PopenProcess, which is historically useful for Jython support:
* use subprocess.Popen since Jython does not support os.fork()
* use blocking IO with threads, since Jython does not support
fcntl non-blocking IO)
Portage does not currently support Jython, but re-introducing support
in The Future (TM) may be possible.
"""
_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=PipeReaderBlockingIO(),
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 testPopenPipeBlockingIO(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, f"x = {x}, len(output) = {len(output)}"
)
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