Covid_19: Validate cummulative fields in CSVs

[metaodi]

Some fields like ncumul_tested are supposed to be cummulative. Add a simple validation to check if this number is either the same or greater than the previous number or empty.

[gaberoo]

Something like this?

https://github.com/gaberoo/covid_19/blob/validate_cumul/scripts/validate_csv.rb

The script checks all fields that start with ncumul for inconsistencies, i.e. the subsequent number is smaller than the previous one.

 ❯ ruby scripts/validate_csv.rb scripts/validate_csv_test.csv                                                                   
Error on line 1, canton BS, field ncumul_conf: 9 < 10

[metaodi]

Yes that looks good.

But unfortunately not all fields starting with ncumul are _actually_ cummulative (see README for details). Can you create a PR with the updated script?

I'm anyways working on a "validation" workflow, so I'll include that there.

[gaberoo]

Gotcha. I’ll look into this in a bit.

[metaodi]

So the cummulative fields are:

• ncumul_tested
• ncumul_conf
• ncumul_released
• ncumul_deceased