Add PipeReaderBlockingIO, Jython experimentation.

1 files changed, 62 insertions, 0 deletions

diff --git a/pym/portage/tests/process/test_PopenProcessBlockingIO.py b/pym/portage/tests/process/test_PopenProcessBlockingIO.py
new file mode 100644
index 000000000..9cdad326d
--- /dev/null
+++ b/pym/portage/tests/process/test_PopenProcessBlockingIO.py
@@ -0,0 +1,62 @@
+# Copyright 2012 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+import subprocess
+
+try:
+	import threading
+except ImportError:
+	threading = None
+
+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 can be 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)
+	"""
+
+	_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):
+
+		if threading is None:
+			skip_reason = "threading disabled"
+			self.portage_skip = "threading disabled"
+			self.assertFalse(True, skip_reason)
+			return
+
+		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)))