Testing & Quality
Learn Automated Testing
Automated tests are programs that check your program. They describe expected behaviour once, then verify it every time the code changes.
Why teams use it
- They let you change code without manually re-checking everything.
- A failing test points at the problem far faster than a bug report does.
- They document what the system is supposed to do.
Where you will meet it
Refactoring a pricing calculation is only comfortable when a test suite can confirm the results did not change.
What to learn, and in what order
Work through these roughly in order. Jumping to the advanced list before the basics are solid is the most common way people get stuck.
Beginner
- Why testing matters
- Your first unit test
- Arrange, act, assert
- Running tests locally
Intermediate
- Test doubles and mocking
- Integration tests
- Testing an API end to end
- Organising a test suite
Advanced
- Coverage and what it does not tell you
- Test data strategies
- Testing in the pipeline
- Flaky test diagnosis
Have a project worth talking through?
Tell us what you're building or what's slowing your current system down. We'll give you a direct read on scope and approach.