Black box testing hundreds of data connectors

Airbyte is an open-source platform designed to simplify data integration by enabling the creation and maintenance of thousands of data connectors. To ensure the quality and correctness of these connectors, Airbyte developed Connector Acceptance Tests (CATs), which are black box test suites that validate a connector's behavior against best practices. CATs provide developers with prebuilt test cases for every connector, regardless of the data silo it connects to or its implementation language. While CATs have limitations and cannot replace unit tests and integration tests, they offer significant advantages in terms of quality assurance, developer experience, and high leverage development.