The document discusses test-driven development (TDD) and its importance in reducing bugs. It emphasizes the need to write tests first, ensure functionality with simplicity, and refactor code, specifically in relation to barcode handling. Challenges such as varying barcode lengths and potential changes are also mentioned.

1. ARE YOU NOT USING TDD ?!
while ( TDD === false ) {
bugs ++;
}

4. T.D.D ?

5. TEST
DRIVEN
DEVELOPMENT

8. TEST FIRST

9. MAKE IT PASS AS SIMPLE AS POSSIBLE

10. REFACTOR

11. The web service offered by the government
returns the value of the barcode with 44
characters.
A barcode with 48 characters
Our goal
What we have

18. BRING IT ON !
What if we change the code bar to a
new one ?
What if we provide a code bar with
less than 44 characters ?