Download all the below files and keep it in the same directory

unittestfile.csv unittestresults.txt datediff_v12.py test_datediff_ver1.2.py test_date_prep.py

For creating test case data run the test_date_prep.py in the below format

python3 test_date_prep.py "01/01/2021" "03/01/2021"

Sample result below

01/12/2021 03/12/2021 Difference between dates in days: 2

from the above result minus 1 and copy both the dates and result in this format and update the unittestfile.csv 01/01/2021,03/01/2021,1

Once updated execute the unit test script

python3 test_datediff_ver1.2.py

     start         end  test_case_diff  difference              Test_result

0 01/01/2012 01/03/2012 58 58 Results are matching 1 25/02/2020 01/03/2020 4 4 Results are matching 2 25/02/2021 01/03/2021 3 3 Results are matching 3 25/02/2021 03/03/2021 5 5 Results are matching 4 25/02/2022 03/03/2022 5 5 Results are matching 5 01/01/2012 01/03/2013 424 424 Results are matching 6 01/01/2012 01/03/2014 789 789 Results are matching 7 01/01/2014 01/03/2012 -1 -1 Results are matching 8 01/01/1901 01/03/2014 41331 41331 Results are matching 9 01/01/2012 01/01/2012 0 0 Results are matching 10 01/01/2012 02/01/2012 0 0 Results are matching 11 01/01/1900 02/01/2012 0 40907 Result are not matching 12 01/01/1901 02/01/3000 0 401402 Result are not matching 13 25/02/1901 02/03/1901 4 4 Results are matching 14 01/12/2021 04/12/2999 357209 357209 Results are matching

For running the original script

python3 datediff_v12.py

Enter the start date in dd/mm/yyyy format: 01/12/2021 Enter the end date in dd/mm/yyyy format: 02/12/2021