TDD workshop - giugno 2025

Slides

https://docs.google.com/presentation/d/1ewWFtGaiH3-9mx44YfGG7cbvaaGaknel/edit?usp=sharing&ouid=109663187221444318309&rtpof=true&sd=true

Final Code

The final code is in the branch workshop-end: https://github.com/firenzedev/tdd-workshop/tree/workshop-end

Rules:

1. Add a small test.
2. Run all the tests and fail.
3. Make a small change.
4. Run tests and succeed.
5. Refactor to remove duplication.

Introduction

We want to create a multi-currency report, like this:

Supplier	Quantity	Price	Total
CodeCorp	1000	25 USD	25000 USD
BugBusters	400	150 CHF	60000 CHF
Total			65000 USD

We also need to specify exchange rates:

From	To	Rate
CHF	USD	1.5

Thinking about what we want to achieve, I wrote some tasks to guide us during development:

• generate report
• 1000 x 25USD + 400 x 150CHF = 65000USD when the rate is 2:1
• $5 + 10 CHF = $10 if rate is 2:1
• $5 * 2 = $10
• [ ]