def test_failing_deferToProcess(self):
"""
Test failing subprocesses and the way they terminate and preserve
failing information.
"""
s = sio()
a = FakeAMP(s)
STRING = b"ciao"
BOOT = """\
import sys
def main(arg):
raise Exception(arg)
main(sys.argv[1])
"""
starter = main.ProcessStarter(bootstrap=BOOT, args=(STRING,), packages=("twisted", "ampoule"))
ready, finished = starter.startPythonProcess(main.AMPConnector(a), "I'll be ignored")
self.assertFailure(finished, error.ProcessTerminated)
finished.addErrback(lambda reason: self.assertEquals(reason.getMessage(), STRING))
return finished
def test_env_setting(self):
"""
Test that and environment variable passed to the process starter
is correctly passed to the child process.
"""
s = sio()
a = FakeAMP(s)
STRING = b"ciao"
BOOT = """\
import sys, io, os
def main():
with io.open(4, 'w' + ('b' if bytes is str else '')) as f:
f.write(os.environ['FOOBAR'])
main()
"""
starter = main.ProcessStarter(bootstrap=BOOT,
packages=("twisted", "ampoule"),
env={"FOOBAR": STRING})
amp, finished = starter.startPythonProcess(main.AMPConnector(a), "I'll be ignored")
return finished.addCallback(lambda _: self.assertEquals(s.getvalue(), STRING))
def test_startProcess(self):
"""
Test that startProcess actually starts a subprocess and that
it receives data back from the process through AMP.
"""
s = sio()
a = FakeAMP(s)
STRING = b"ciao"
BOOT = """\
import sys, os
def main(arg):
os.write(4, arg.encode("utf-8"))
main(sys.argv[1])
"""
starter = main.ProcessStarter(bootstrap=BOOT,
args=(STRING,),
packages=("twisted", "ampoule"))
amp, finished = starter.startPythonProcess(main.AMPConnector(a))
return finished.addCallback(lambda _: self.assertEquals(s.getvalue(), STRING))