shell unit testing

Shell scripts are brittle; this guide shows how to harden and test them by pairing classic tools (ShellCheck, Bats) with AI. You’ll set safe defaults, lint in pre-commit, add Bats tests, use AI to generate adversarial inputs and review code, do property-style fuzzing, wire it into CI, and mind secrets—delivering safer, maintainable Bash with reproducible edge‑case coverage.