Eugene Yan's article discusses the challenges of applying traditional unit testing practices to machine learning code. Unlike standard software where logic is handcrafted, ML models learn logic from data, making direct testing of this learned logic complex. Yan suggests that while mocking dependencies is common in software, ML unit tests may require interacting with the actual model, especially for verifying training progress or inference correctness. He proposes using small, self-contained data samples and testing with random or empty weights to overcome issues with large model sizes and slow inference times. AI
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RANK_REASON This is an opinion piece by a named author discussing best practices in ML development.