Nutter: Databricks Notebook Testing Library

Nutter is a Python library developed by Microsoft for robust unit and integration testing of Databricks notebooks. It streamlines the testing workflow for data and machine learning engineers by providing a framework to define test fixtures within notebooks. Nutter comprises two main components: the Nutter Runner (server-side, installed on Databricks clusters) and the Nutter CLI (client-side for local or CI/CD execution). It integrates easily with CI/CD pipelines like Azure DevOps, facilitating automated testing and quality assurance for Databricks-based data pipelines. The current version is 0.1.35, with a regular release cadence addressing enhancements and bug fixes.