stevenmburns/add-tests

Add Tests for Existing Code

Given a file or module, analyze its behavior and write tests that cover its main cases.

Usage

/add-tests <file-path>

Steps

1. Read the target file to understand what it does — its public interface, logic branches, edge cases, and error conditions
2. Find the test runner by checking package.json scripts or pyproject.toml — determine where test files live and what naming convention is used (e.g. *.test.ts, test_*.py)
3. Check for existing tests — search for any existing test file for this module; if one exists, read it and identify what is already covered before writing anything new
4. Write tests in the appropriate test file (create it if it doesn't exist, following project conventions):
   • Cover the primary happy path(s)
   • Cover meaningful edge cases and error conditions visible from the code
   • Do not write trivial tests (e.g. "it exists") or tests for implementation details
   • Keep tests focused and independent
5. Run the tests to confirm they all pass — if any fail, fix them before proceeding
6. Report what was covered and what was intentionally left out (and why)