KwickClips Course Topics · 43 sec · free
Does running without errors prove a program is correct?
Short answer. No.
What does a mismatch between expected and actual mean?
A bug.
What is test data?
| Values chosen to test |
| Write the expected result |
| Compare with actual result |
Remember
| Expected vs actual |
| Mismatch means a bug |
Your program runs. Does that prove it is correct? No. Use test data. Choose values on purpose. Write the expected result first. Then compare it with the actual result. Remember. Compare expected and actual. A mismatch means a bug.
This clip is from the full lesson: Test data: normal, abnormal, extreme, boundary — 5 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Cambridge IGCSE Grade 10 Computer Science (0478)
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