String Calculator Mock Logging Test Pass

stringcalculator.py

import logging
def add(str):
  if(len(str) == 0) : 
    logging.info(0)
    return 0
  else:
    numbers_str = []
    numbers_comma_split = str.split(',')
    sum_result = 0
    for i in range(len(numbers_comma_split)):
      sum_result = sum_result + numbers_comma_split[i]
    logging.info(sum_result)
    return sum_result