🌀 Note: These are my rough notes. This is just here for reference readers before I switch to the new outline / structure of the book.
💡 Pure functions are easily tested; inputs and outputs. For core code that relies on infrastructure or state, however, a more rigorous approach is required. In this chapter, we learn about test doubles: objects that stand in…
This book’s mission is to teach developers the essential skills and practices to write testable, flexible, and maintainable code.
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