TDD
Definition
Test-Driven Development (TDD) is a software development process that relies on the repetition of a very short development cycle: first the developer writes an (initially failing) automated test case that defines a desired improvement or new function, then produces the minimum amount of code to pass that test, and finally refactors the new code to acceptable standards.
Why It Matters
TDD encourages simple design and inspires confidence. By writing the test first, developers are forced to think about the requirements and design of a feature before writing the code. This often leads to better-designed and more testable code.
Contextual Example
The TDD mantra is "Red, Green, Refactor." 1. Red: Write a test and watch it fail. 2. Green: Write the simplest possible code to make the test pass. 3. Refactor: Clean up the code while keeping the test green.
Common Misunderstandings
- TDD is not about testing; it is a design methodology that uses tests to drive the development process.
- It can feel slow at first, but many practitioners find it leads to higher quality code and faster development in the long run.