why expected method never call error?

[Sanjeev Kumar]

I have a dummy module in which A class is used to filter the list containing only string items and then a filter based on starting character is returned using filter list method.

import sys

import ast

from PyQt4 import QtCore,QtGui

class ItemNotString(Exception):

pass

class FilterList(object):

""" docstring for FilterList

"""

def __init__(self, filterby):

super(FilterList, self).__init__()

self._filter = filterby

def checkListItem(self, lst):

for index, item in enumerate(lst):

if type(item) == str:

continue

else:

raise ItemNotString("%i item '%s' is not of type string" % (index+1, item))

return self.filterList(lst)

def filterList(self, lst):

filteredList = []

for eachItem in lst:

if eachItem.startswith(self._filter):

filteredList.append(eachItem)

return filteredList

if __name__ == "__main__":

try:

filterby = sys.argv[2]

except IndexError:

filterby = 'H'

flObj = FilterList(filterby)

print flObj.checkListItem(ast.literal_eval(sys.argv[1]))

but the above module filterList.py tested method filterList() using mox gives error

import unittest

import filterList

import mox

class TestFilterList(unittest.TestCase):

""" docstring for TestFilterList

"""

def setUp(self):

self._filterby = 'B'

self.flObj = filterList.FilterList(self._filterby)

self.mox = mox.Mox()

def tearDown(self):

self.mox.UnsetStubs()

def test_checkListItem(self):

self.assertRaises(filterList.ItemNotString, self.flObj.checkListItem, ['hello', 'Boy', 1])

def test_checkListItem_True(self):

self.assertTrue(self.flObj.checkListItem(['Boy','Bar','Home']))

def test_filterList(self):

self.assertEquals(['Boy', 'Bar'], self.flObj.filterList(['Boy','Bar','Home']))

def test_usingMox(self):

self.mox.StubOutWithMock(self.flObj,'checkListItem')

mockLst = self.flObj.checkListItem().AndReturn(['Bar'])

self.mox.ReplayAll()

filteredList = self.flObj.filterList(mockLst)

self.assertEquals(['Bar'], filteredList)

self.mox.VerifyAll()

if __name__ == '__main__':

unittest.main()

And error I get is 

...F

======================================================================

FAIL: test_usingMox (__main__.TestFilterList)

----------------------------------------------------------------------

Traceback (most recent call last):

  File "test_filterList.py", line 33, in test_usingMox

    self.mox.VerifyAll()

  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mox.py", line 284, in VerifyAll

    mock_obj._Verify()

  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mox.py", line 504, in _Verify

    raise ExpectedMethodCallsError(self._expected_calls_queue)

ExpectedMethodCallsError: Verify: Expected methods never called:

  0.  Stub for <bound method FilterList.checkListItem of <filterList.FilterList object at 0x106fd4250>>.__call__() -> ['Bar']

----------------------------------------------------------------------

Ran 4 tests in 0.001s

FAILED (failures=1)

please help me out clear the concept of testing using mox.