// Hacker Noon · 26 January 2026

Data Pipeline Testing: The 3 Levels Most Teams Miss

Most data teams test code but not data. That’s why dashboards don’t represent actual state, models degrade unnoticed, and incidents show up as “weird numbers” instead of errors. This article breaks down **three levels of data testing** — schema, business logic, and contracts — and shows how to integ...

Hacker Noon

@hacker-noon · Ivan Timonov

hackernoon.com

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