Codex For Test Generation: From Coverage Gaps To Passing Suites

End-of-lesson check

15 questions · take it digitally for instant feedback at tendril.neural-forge.io/learn/quiz/end-codex-test-generation-creators

1. What is the core idea behind "Codex For Test Generation: From Coverage Gaps To Passing Suites"?

   1. Codex can generate tests well when you give it the contract. It generates flaky theater when you ask for 'tests' with no spec.
   2. Promote your team's top three to a shared prompt library
   3. Product judgement — should we build this at all?
   4. Failure recovery — when a test fails, the agent reads the output and retries

2. Which term best describes a foundational idea in "Codex For Test Generation: From Coverage Gaps To Passing Suites"?

   1. characterization tests
   2. test contract
   3. mutation testing
   4. test theater

3. A learner studying Codex For Test Generation: From Coverage Gaps To Passing Suites would need to understand which concept?

   1. test contract
   2. mutation testing
   3. characterization tests
   4. test theater

4. Which of these is directly relevant to Codex For Test Generation: From Coverage Gaps To Passing Suites?

   1. test contract
   2. characterization tests
   3. test theater
   4. mutation testing

5. Which of the following is a key point about Codex For Test Generation: From Coverage Gaps To Passing Suites?

   1. Spec-first: you write the contract in prose, Codex writes the tests
   2. Coverage-driven: Codex sees a coverage report and fills the gaps
   3. Characterization: Codex reads existing behavior and writes tests that lock it in
   4. Promote your team's top three to a shared prompt library

6. What is one important takeaway from studying Codex For Test Generation: From Coverage Gaps To Passing Suites?

   1. Tests with no assertions or trivial assertions
   2. Tests that mock everything and verify the mocks were called
   3. Tests that pass when you delete the body of the function under test
   4. Tests that test implementation details you might want to change

7. Which of these does NOT belong in a discussion of Codex For Test Generation: From Coverage Gaps To Passing Suites?

   1. Tests with no assertions or trivial assertions
   2. Promote your team's top three to a shared prompt library
   3. Tests that mock everything and verify the mocks were called
   4. Tests that pass when you delete the body of the function under test

8. Which of these correctly reflects a principle in Codex For Test Generation: From Coverage Gaps To Passing Suites?

   1. Write the contract in 5 to 10 sentences
   2. Ask Codex for tests in spec-first mode
   3. Manually break the function in three ways. How many tests catch each break? That is your real covera…
   4. Pick a function with weak coverage

9. Which of these does NOT belong in a discussion of Codex For Test Generation: From Coverage Gaps To Passing Suites?

   1. Write the contract in 5 to 10 sentences
   2. Promote your team's top three to a shared prompt library
   3. Pick a function with weak coverage
   4. Ask Codex for tests in spec-first mode

10. What is the key insight about "Characterization for refactor safety" in the context of Codex For Test Generation: From Coverage Gaps To Passing Suites?

    1. Promote your team's top three to a shared prompt library
    2. Before refactoring legacy code, ask Codex for characterization tests. Pin in what the code currently does — bugs and all.
    3. Product judgement — should we build this at all?
    4. Failure recovery — when a test fails, the agent reads the output and retries

11. What is the key insight about "Run mutation testing on generated tests" in the context of Codex For Test Generation: From Coverage Gaps To Passing Suites?

    1. Promote your team's top three to a shared prompt library
    2. Product judgement — should we build this at all?
    3. If a mutation tool can break the function and your generated tests still pass, the tests do not test the function.
    4. Failure recovery — when a test fails, the agent reads the output and retries

12. Which statement accurately describes an aspect of Codex For Test Generation: From Coverage Gaps To Passing Suites?

    1. Promote your team's top three to a shared prompt library
    2. Product judgement — should we build this at all?
    3. Failure recovery — when a test fails, the agent reads the output and retries
    4. When you ask Codex to 'write tests for this file', it has to invent a specification first.

13. What does working with Codex For Test Generation: From Coverage Gaps To Passing Suites typically involve?

    1. The big idea: tests test contracts, not code. Tell Codex the contract and the tests get sharp. Skip the contract and you get theater.
    2. Promote your team's top three to a shared prompt library
    3. Product judgement — should we build this at all?
    4. Failure recovery — when a test fails, the agent reads the output and retries

14. Which best describes the scope of "Codex For Test Generation: From Coverage Gaps To Passing Suites"?

    1. It is unrelated to tools workflows
    2. It focuses on Codex can generate tests well when you give it the contract. It generates flaky theater when you ask
    3. It applies only to the opposite beginner tier
    4. It was deprecated in 2024 and no longer relevant

15. Which section heading best belongs in a lesson about Codex For Test Generation: From Coverage Gaps To Passing Suites?

    1. Promote your team's top three to a shared prompt library
    2. Product judgement — should we build this at all?
    3. The three test-generation modes
    4. Failure recovery — when a test fails, the agent reads the output and retries