TDD - It's About More Than Just the Tests
summary
Claim: test driven development is a design technique that produces simpler, more maintainable code rather than being just about tests. Demonstration uses C# and NUnit in VS Code with live coding of the Roman numeral kata, following red–green–refactor and small recursive steps. Resulting implementation uses a mappings list plus recursion and LINQ, collapses to three lines of core logic, handles subtractive cases and all values up to 3999 with passing tests.
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