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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.application.runner._exit}.
"""
from twisted.python.compat import NativeStringIO
from ...runner import _exit
from .._exit import exit, ExitStatus
import twisted.trial.unittest
class ExitTests(twisted.trial.unittest.TestCase):
"""
Tests for L{exit}.
"""
def setUp(self):
self.exit = DummyExit()
self.patch(_exit, "sysexit", self.exit)
def test_exitStatusInt(self):
"""
L{exit} given an L{int} status code will pass it to L{sys.exit}.
"""
status = 1234
exit(status)
self.assertEqual(self.exit.arg, status)
def test_exitStatusStringNotInt(self):
"""
L{exit} given a L{str} status code that isn't a string integer raises
L{ValueError}.
"""
self.assertRaises(ValueError, exit, "foo")
def test_exitStatusStringInt(self):
"""
L{exit} given a L{str} status code that is a string integer passes the
corresponding L{int} to L{sys.exit}.
"""
exit("1234")
self.assertEqual(self.exit.arg, 1234)
def test_exitConstant(self):
"""
L{exit} given a L{ValueConstant} status code passes the corresponding
value to L{sys.exit}.
"""
status = ExitStatus.EX_CONFIG
exit(status)
self.assertEqual(self.exit.arg, status.value)
def test_exitMessageZero(self):
"""
L{exit} given a status code of zero (C{0}) writes the given message to
standard output.
"""
out = NativeStringIO()
self.patch(_exit, "stdout", out)
message = "Hello, world."
exit(0, message)
self.assertEqual(out.getvalue(), message + "\n")
def test_exitMessageNonZero(self):
"""
L{exit} given a non-zero status code writes the given message to
standard error.
"""
out = NativeStringIO()
self.patch(_exit, "stderr", out)
message = "Hello, world."
exit(64, message)
self.assertEqual(out.getvalue(), message + "\n")
class DummyExit(object):
"""
Stub for L{sys.exit} that remembers whether it's been called and, if it
has, what argument it was given.
"""
def __init__(self):
self.exited = False
def __call__(self, arg=None):
assert not self.exited
self.arg = arg
self.exited = True