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Explore techniques for crafting clear and manageable automated tests that ensure long-term value in Rails applications. Understand how to avoid complexity in test code, simplify failure diagnosis, and support ongoing development by writing tests that promote modular designs and minimize maintenance costs.

As the Rails community has matured, Rails developers have become much more likely to work with codebases and test suites that contain many years worth of work. As a result, there has been a lot of discussion about design strategies to manage complexity over time.

There hasn’t been nearly as much discussion about what practices make tests and test suites maintain value over time. As applications grow, suite runs become longer, and complexity increases, ...