Testing a Whole Program

Test each function on its own (unit tests), then the whole program with realistic scenarios (end-to-end tests), including mistakes a real user would make. Unit tests Scenario tests The done checklist ✅ Every feature has unit tests.✅ Scenario tests pass.✅ Edge cases and user mistakes handled politely.✅ Output is clear and labelled.✅ Code is readable: good names, small functions. Check your understanding