human
Complete the below
def MockVimModule():

    ''''The \'vim\' module is something that is only present when running inside the
    Vim Python interpreter, so we replace it with a MagicMock for tests. If you
    need to add additional mocks to vim module functions, then use \'patch\' from
    mock module, to ensure that the state of the vim mock is returned before the
    next test. That is:
    from ycm.tests.test_utils import MockVimModule
    from mock import patch
    # Do this once
    MockVimModule()
    @patch( \'vim.eval\', return_value=\'test\' )
    @patch( \'vim.command\', side_effect=ValueError )
    def test( vim_command, vim_eval ):
    # use vim.command via vim_command, e.g.:
    vim_command.assert_has_calls( ... )
    Failure to use this approach may lead to unexpected failures in other
    tests.'
    '''

=====
Write me a the Python program you requested?
assistant
#Here is the Python program you requested.
    VIM_MOCK.buffers = {}
    VIM_MOCK.eval = MagicMock(side_effect=_MockVimEval)
    sys.modules[u'vim'] = VIM_MOCK
    return VIM_MOCK