---
name: addtests
description: Add tests that cover core concepts and prevent regressions without overfitting or crystallizing the code base. Use when the user asks for tests, more coverage, or a regression test for a bug fix, or invokes `/z:addtests`.
---

# Add tests

Add tests for whatever code the user named when invoking this skill.

We want to make sure our tests are reasonable and don't overfit the solution, we do not
want to crystalize the code base. They should test core concepts and fundamental
capabilities or prevent bugs from recurring, but do not need to test every single line
or edge case.

If you are fixing a bug, after writing the tests, run the tests (using the appropriate
test command for this repository, such as `task test`, `npm test`, `pytest`, etc.) and
it should pass. Then revert the source code changes from this branch to ensure that the
tests FAIL when the fix is not in place, then put the exact same source code changes
back in place, re-run the tests and ensure that they all pass again. Iterate until all
of the tests pass.

Use parameterized tests instead of for loops when testing different scenarios.