Write Unit Tests for Any Function
Generate comprehensive unit tests for any function or class, covering happy paths, edge cases, and error conditions.
The Prompt
Write comprehensive unit tests for the following code. Use [JEST/PYTEST/VITEST — specify your framework]. Cover: 1. Happy path — normal expected usage 2. Edge cases — empty inputs, zero values, max values, special characters 3. Error conditions — what should throw or return an error 4. Boundary values — just inside and outside valid ranges Organize tests with descriptive `describe` and `it/test` blocks. Add comments explaining why each test case matters. Code to test: ``` [PASTE YOUR CODE HERE] ```
Example Output
Generated 14 test cases covering null inputs, empty arrays, negative numbers, floating-point edge cases, and async rejection scenarios. Each test has a clear description and an assertion for the exact expected behavior.
FAQ
Which AI model is best for Write Unit Tests for Any Function?
GPT-4o or Claude Sonnet 4 — either works well. GPT-4o is slightly faster for Jest; Claude is better for documenting intent.
How do I use the Write Unit Tests for Any Function prompt?
Copy the prompt, replace the [BRACKETED] placeholders with your specific information, and paste into your preferred AI assistant (ChatGPT, Claude, Gemini, etc.). Generated 14 test cases covering null inputs, empty arrays, negative numbers, floating-point edge cases, and async rejection scenarios. Each test has a clear description and an assertion for the exact expected behavior.
Model Recommendation
GPT-4o or Claude Sonnet 4 — either works well. GPT-4o is slightly faster for Jest; Claude is better for documenting intent.