What does "TDD" mean in programming?
TDD is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
Test-Driven Development. A practice where you write a failing test before writing the implementation code, then write just enough code to make the test pass, then refactor. The cycle is Red (test fails) → Green (test passes) → Refactor. TDD produces well-tested code and forces you to think about the interface before the implementation.
Example
"I practiced TDD on the new auth module: I wrote all the tests first, then implemented the logic until they passed."
Can you put this sentence in the right order?
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