Semaine 3 : Untestable code

Question 1

Why should I write tests?

Answer 1

• Manual testing is too expensive
• It is too easy to make mistakes
• How can I make sure my new code doesn’t break the existing one?
• It’s the right thing to do

Question 2

What is a test?

Answer 2

In other words, a test is just a piece of code that invokes a method and tests its output.

Question 3

Qu’est-ce que le SRP?

Answer 3

Le single responsibility principle est qu’une classe doit avoir une seule responsabilité. S’il y’en a plus qu’une, il faut refactor.

Question 4

Quel est le principe de reduce coupling?

Answer 4

• Group dependencies
• Define better interfaces
• Rely on mock objects