'Check the URL filenames
:return: A list mutants.'

def _generate_fname(self, fuzzable_request):

    url = fuzzable_request.get_url()
    fname_ext = url.get_file_name()
    splitted_fname_ext = fname_ext.split('.')
    if (not (len(splitted_fname_ext) == 2)):
        return []
    name = splitted_fname_ext[0]
    wordnet_result = self._search_wn(name)
    wordnet_result = [word for word in wordnet_result if ('    ' not in word)]
    fuzzer_config = {'fuzz_url_filenames': True}
    mutants = FileNameMutant.create_mutants(fuzzable_request, wordnet_result, [0], False, fuzzer_config)
    return mutants
