test-driven-hook-debugging

name	test-driven-hook-debugging
description	Debugging and fixing shell hooks by writing isolated test suites first, then using test failures to pinpoint logic bugs
version	1.0.0
source	auto-extracted
extracted	"2026-04-10T00:00:00.000Z"
metadata	{"tags":["testing","shell-scripting","debugging","hooks","TDD"]}

Test-Driven Hook Debugging

When a shell hook has subtle logic bugs (e.g., git operations failing silently in non-repo contexts), write a focused test suite in Python using subprocess to call the hook in controlled scenarios. Run tests to see the failure mode, then trace the gap between test expectations and hook behavior. Use guard clauses (e.g., git rev-parse --git-dir before git log) to handle edge cases. Re-run tests atomically after each fix to confirm the change. This approach isolates the bug and prevents regressions better than manual testing.