AI and Unit Tests: Write Tests That Catch Future You

End-of-lesson check

15 questions · take it digitally for instant feedback at tendril.neural-forge.io/learn/quiz/end-builders-ai-coding-AI-and-unit-tests-teen

1. What is the main purpose of a unit test?

   1. To check that a single function behaves correctly
   2. To automatically write documentation for you
   3. To make your code run faster
   4. To replace your main code entirely

2. What does it mean to 'mock' an external API in a test?

   1. To delete the API from your project
   2. To test the actual live API directly
   3. To make the API run faster
   4. To create a fake version of the API that returns predetermined responses

3. Why do developers describe tests as 'notes to future you'?

   1. Tests replace the need for comments in code
   2. Tests are only useful while you're actively coding
   3. Tests are written in a notebook
   4. Tests remind you later how your code was supposed to work

4. What is Vitest?

   1. A type of artificial intelligence model
   2. A programming language
   3. A code editor
   4. A testing framework for writing and running unit tests

5. What happens when a unit test fails?

   1. The test was written incorrectly and should be deleted
   2. Nothing happens, failed tests are ignored
   3. The test has found a bug in your code
   4. Your computer shuts down

6. What is a key advantage of having AI write your unit tests?

   1. AI tests are required by law
   2. AI cannot write unit tests
   3. AI always writes perfect tests that never fail
   4. AI can write tests much faster than humans can

7. What does 'test coverage' refer to?

   1. How many users run your tests
   2. How much of your code is actually tested by your test suite
   3. How long your tests take to run
   4. How many programmers wrote the tests

8. You ask AI to write 5 tests for your function and 2 of them fail. What has happened?

   1. The AI made a mistake and the tests are useless
   2. You have discovered bugs or unexpected behavior in your function
   3. You need to delete your function and start over
   4. The tests are too difficult to run

9. Why is it better to mock an external API during testing rather than call the real API?

   1. Mocking avoids slow network calls and keeps tests reliable and fast
   2. Mocked APIs always return correct data
   3. Real APIs cannot be tested
   4. Mocking makes your code longer

10. What does it mean to 'level up' in the context of this lesson?

    1. You have reached the highest rank in a video game
    2. You have completed all your homework
    3. You have gained a new skill (writing tests with AI) that makes you a better developer
    4. You have mastered everything about coding

11. If you return to a project months later and forget how a function works, what can help you understand it?

    1. Reading the unit tests that describe expected behavior
    2. Deleting the function and starting fresh
    3. Nothing, you have to rewrite the function
    4. Asking your teacher

12. What does high code coverage tell you about your tests?

    1. Your tests run very quickly
    2. Your tests exercise most or all of your code's lines
    3. Your code has no bugs
    4. Your tests are written by AI

13. Why should tests check how a function handles special characters?

    1. Special characters are required by all programs
    2. Special characters can cause security problems or crashes if not handled properly
    3. Tests cannot check special characters
    4. Special characters make tests more fun

14. Jest is another popular testing framework similar to Vitest. What do both frameworks provide?

    1. A way to create user interfaces
    2. A way to write and run automated unit tests
    3. A way to host websites
    4. A programming language for beginners

15. When AI explains a failing test in plain English, who benefits most from this feature?

    1. Anyone who needs help understanding why their code didn't work
    2. Only beginners
    3. No one benefits from this
    4. Only expert programmers