how to test whether program exits or not - testing

Question

I want to test the next class:
from random import randint
class End(object):
def __init__(self):
self.quips=['You dead', 'You broke everything you can','You turn you head off']
def play(self):
print self.quips[randint(0, len(self.quips)-1)]
exit(1)
I want to test it with nosetests so I could see that the class exits correctly with code 1. I tried differents variants but nosetest returns error like
File "C:\Python27\lib\site.py", line 372, in __call__
raise SystemExit(code)
SystemExit: 1
----------------------------------------------------------------------
Ran 1 test in 5.297s
FAILED (errors=1)
Ofcourse I can assume that it exits but I want for test to return OK status not error. Sorry if my question may be stupid. Im very new to python and I try to test something my very first time.

Answer 1

I would recommend using the assertRaises context manager. Here is an example test that ensures that the play() method exits:
import unittest
import end
class TestEnd(unittest.TestCase):
def testPlayExits(self):
"""Test that the play method exits."""
ender = end.End()
with self.assertRaises(SystemExit) as exitexception:
ender.play()
# Check for the requested exit code.
self.assertEqual(exitexception.code, 1)

Answer 2

As you can see in the traceback, sys.exit()* raises an exception called SystemExit when you call it. So, that's what you want to test for with nose's assert_raises(). If you are writing tests with unittest2.TestCase that's self.assertRaises.
*actually you used plain built-in exit() but you really should use sys.exit() in a program.