'L{deprecate.warnAboutFunction} emits a warning that will be filtered if
L{warnings.filterwarning} is called with the module name of the
deprecated function.'

def test_filteredWarning(self):

    del warnings.filters[:]
    warnings.filterwarnings(action='ignore', module='twisted_private_helper')
    from twisted_private_helper import module
    module.callTestFunction()
    warningsShown = self.flushWarnings()
    self.assertEqual(len(warningsShown), 0)
