Monday Workshop

DWYL TDD Tutorial

Starter Questions:

• Easy questions first: What is the Red-Green-Refactor cycle?
• What is ping pong pair programming?

Vending Machine Change Calculator

• 2 hour Workshop
• Cohort pairs off and builds the vending machine

Emphasis is on Red-Green-Refactor cycle and ping pong pair programming work flow.

Workshop Goals:

• Get comfortable with Red-Green-Refactor TDD cycle
• Practise ping ponging when writing tests
• If all the alliteration wasn't enough of a hint: Have fun!

Things to Remember:

• What's a sensible first test for a function?
• Is this the simplest possible test you can think of?
• What test are you going to add next?
• As you work through the problem are all your tests still passing? If not, why not?
• As you work through the problem are you working from the outside in, or are you trying to solve the problem in a linear sequence from top to bottom? (Hint: try working from the outside in, always thinking about the inputs and outputs of the code block you are working on.)