Paths/Codex Engineer/Testing with Codex / Writing Tests
Review the Generated Test
A generated test proves nothing if it cannot fail. Write the review that makes sure it would.
Validator
⏱ 0:00
IDLE — checks run live as you type commands; submit when done
01Requirements
live checks- File ~/codex/tests/review.md exists○
- The document states how to prove the test can fail○
- The document states which assertions to reject○
02Walkthrough
1 of 4 revealed- 01
Create the tests directory
The review checklist is written once and used every time.
mkdir -p ~/codex/tests - 3 locked · each failed submit reveals one
03Stuck?
0 of 3 revealedTake a hint without losing the lab — each one points at the thing to look at, not at the answer.
04AI Tutor
guides, never solvesTell me what you're stuck on — I'll nudge, not solve. Which requirement are you looking at?
04Notebook
saved locally in this browserlearner@lab — ubuntu:24.04
Session is disposable
↑/↓ recalls commands · Ctrl+Enter submits · type help for the command list