Telling Claude or ChatGPT to write tests before the function forces you to lock in what 'done' looks like.
7 min · Reviewed 2026
The big idea
Test-driven development means writing the test first, watching it fail, then writing code until it passes. Asking an AI to draft the tests from your description is fast and exposes vague specs immediately — you'll see when the AI invents details you never said.
Some examples
You ask Claude 'write 5 tests for a function that converts USD to EUR' and notice it assumed a fixed rate — so you specify a rates argument.
You tell ChatGPT to write Jest tests for a login form and it asks 'what happens with empty input?' — a case you forgot.
You have Cursor generate Pytest cases for a parser and it covers an edge case (empty string) you'd have shipped broken.
You ask Copilot for tests of a sort function and it includes negative numbers and duplicates.
Try it!
Pick a small function you want to write. Describe it in one paragraph to an AI and ask for 5 tests before any code. Notice which tests surprise you.
End-of-lesson check
15 questions · take it digitally for instant feedback at tendril.neural-forge.io/learn/quiz/end-builders-aicoding-ai-writes-test-first-r8a8-teen
What is the core idea behind "Asking AI to Write the Tests First"?
Telling Claude or ChatGPT to write tests before the function forces you to lock in what 'done' looks like.
You ask Cursor 'rename the local variable user to currentUser in this file only'…
Run the tests to confirm coverage
env variable
Which term best describes a foundational idea in "Asking AI to Write the Tests First"?
test-first
TDD
specs
AI tests
A learner studying Asking AI to Write the Tests First would need to understand which concept?
TDD
specs
test-first
AI tests
Which of these is directly relevant to Asking AI to Write the Tests First?
TDD
test-first
AI tests
specs
Which of the following is a key point about Asking AI to Write the Tests First?
You ask Claude 'write 5 tests for a function that converts USD to EUR' and notice it assumed a fixed…
You tell ChatGPT to write Jest tests for a login form and it asks 'what happens with empty input?' —…
You have Cursor generate Pytest cases for a parser and it covers an edge case (empty string) you'd h…
You ask Copilot for tests of a sort function and it includes negative numbers and duplicates.
Which of these does NOT belong in a discussion of Asking AI to Write the Tests First?
You tell ChatGPT to write Jest tests for a login form and it asks 'what happens with empty input?' —…
You ask Claude 'write 5 tests for a function that converts USD to EUR' and notice it assumed a fixed…
You have Cursor generate Pytest cases for a parser and it covers an edge case (empty string) you'd h…
You ask Cursor 'rename the local variable user to currentUser in this file only'…
What is the key insight about "The rule" in the context of Asking AI to Write the Tests First?
You ask Cursor 'rename the local variable user to currentUser in this file only'…
Run the tests to confirm coverage
Read the AI's tests carefully — every assumption it made is a spec gap you need to close.
env variable
What is the recommended tip about "Review before you run" in the context of Asking AI to Write the Tests First?
You ask Cursor 'rename the local variable user to currentUser in this file only'…
Run the tests to confirm coverage
env variable
AI code is a first draft. Read through it, understand each line, and test on sample inputs before merging into real proj…
Which statement accurately describes an aspect of Asking AI to Write the Tests First?
Test-driven development means writing the test first, watching it fail, then writing code until it passes.
You ask Cursor 'rename the local variable user to currentUser in this file only'…
Run the tests to confirm coverage
env variable
What does working with Asking AI to Write the Tests First typically involve?
You ask Cursor 'rename the local variable user to currentUser in this file only'…
Pick a small function you want to write. Describe it in one paragraph to an AI and ask for 5 tests before any code.
Run the tests to confirm coverage
env variable
Which best describes the scope of "Asking AI to Write the Tests First"?
It is unrelated to ai-coding workflows
It applies only to the opposite beginner tier
It focuses on Telling Claude or ChatGPT to write tests before the function forces you to lock in what 'done' looks
It was deprecated in 2024 and no longer relevant
Which section heading best belongs in a lesson about Asking AI to Write the Tests First?
You ask Cursor 'rename the local variable user to currentUser in this file only'…
Run the tests to confirm coverage
env variable
Some examples
Which section heading best belongs in a lesson about Asking AI to Write the Tests First?
Try it!
You ask Cursor 'rename the local variable user to currentUser in this file only'…
Run the tests to confirm coverage
env variable
Which of the following is a concept covered in Asking AI to Write the Tests First?
test-first
TDD
specs
AI tests
Which of the following is a concept covered in Asking AI to Write the Tests First?