Track 15 · Lesson 4 of 11

Validation reports

Check every row of every file against business rules, collect all the problems with their location, and report them as CSV and Markdown.

You will be able to

• Write validation rules that return error messages instead of stopping at the first problem
• Locate each problem by file and line number
• Validate a whole folder of exports and collect every error
• Write an error report as CSV and summarise it as a Markdown table