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import subprocess
import mitogen.parent
from mitogen.core import b
import testlib
class CommandLineTest(testlib.RouterMixin, testlib.TestCase):
# Ensure this version of Python produces a command line that is sufficient
# to bootstrap this version of Python.
#
# TODO:
# * 2.7 starting 2.4
# * 2.7 starting 3.x
# * 3.x starting 2.7
def test_valid_syntax(self):
options = mitogen.parent.Options(max_message_size=123)
conn = mitogen.parent.Connection(options, self.router)
conn.context = mitogen.core.Context(None, 123)
args = conn.get_boot_command()
# Executing the boot command will print "EC0" and expect to read from
# stdin, which will fail because it's pointing at /dev/null, causing
# the forked child to crash with an EOFError and disconnect its write
# pipe. The forked and freshly execed parent will get a 0-byte read
# from the pipe, which is a valid script, and therefore exit indicating
# success.
fp = open("/dev/null", "r")
try:
proc = subprocess.Popen(args,
stdin=fp,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
)
stdout, stderr = proc.communicate()
self.assertEqual(0, proc.returncode)
self.assertEqual(stdout,
mitogen.parent.BootstrapProtocol.EC0_MARKER+b('\n'))
self.assertIn(b("Error -5 while decompressing data"), stderr)
finally:
fp.close()
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