add-unit-tests

To add unit tests for mission-critical code, you target critical paths, invariants, and failure modes with focused tests. This ensures stateful machines, error mapping, and security-sensitive branches are robust and reliable.

You write a unit test for a specific function by creating a colocated, deterministic test file and running it with the Bun test runner. Execute the test suite using the `bun test` command to validate your module's behavior.

Deterministic and colocated unit tests follow structured principles to ensure consistent results and maintainability. They focus on targeted testing for edge cases and error handling without duplicating existing test efforts.

Yes, this unit testing approach complements existing test practices without duplicating effort. It integrates seamlessly by focusing specifically on mission-critical functions, edge cases, and error mapping.

The best way to ensure stateful machines and security-sensitive branches are covered is by applying targeted unit tests to critical paths. This structured approach validates invariants and failure modes for mission-critical applications.