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It seems that python nosetest will quit when encountered "sys.exit()", and mocking of this built-in doesn't work. Thanks for suggestions.
412
Wrap your main code in a try / except block, catch SystemExit , and call os. _exit() there, and only there! This way you may call sys. exit normally anywhere in the code, let it bubble out to the top level, gracefully closing all files and running all cleanups, and then calling os.
exit() function allows the developer to exit from Python. The exit function takes an optional argument, typically an integer, that gives an exit status. Zero is considered a “successful termination”.
exit() stops execution without printing a backtrace, raising an Exception does... your question describes exactly what the default behavior is, so don't change anything. @Luper It is very easy to check that sys.
You can try catching the SystemExit exception. It is raised when someone calls sys.exit().
with self.assertRaises(SystemExit):
myFunctionThatSometimesCallsSysExit()
If you're using mock to patch sys.exit, you may be patching it incorrectly.
This small test works fine for me:
import sys
from mock import patch
def myfunction():
sys.exit(1)
def test_myfunction():
with patch('foo.sys.exit') as exit_mock:
myfunction()
assert exit_mock.called
invoked with:
nosetests foo.py
outputs:
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
OK
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