Fix Test

Systematically debug and fix failing test(s) in tests/unit/bashdep_test.sh.

Workflow

1. Identify Failures

make test 2>&1
# Or, narrower:
lib/bashunit tests --filter <test_name>

Parse: which test functions fail, what assertions, what the actual vs expected was.

2. Categorize Each Failure

• Test bug - wrong expected value, missing set_up reset, leaky state
• Implementation bug - bashdep doesn't match expected behavior
• Snapshot drift - output legitimately changed; snapshot needs updating
• Environment issue - missing $TEST_DIR, hardcoded path that doesn't exist, missing fixture
• Bash 3.2 compat regression - code uses a Bash 4+ feature
• Mode-flag leak - BASHDEP_* global from a prior test wasn't reset

3. Fix

• Test bug: correct the assertion, fixture, or set_up
• Implementation bug: minimal fix in bashdep, follow TDD (regression test must already exist or be added now)
• Snapshot drift: confirm the new output is correct, then lib/bashunit --update-snapshots tests/. Review the diff before committing
• Environment: fix the fixture path; never hardcode /tmp/... outside snapshot tests
• Bash 3.2 compat: swap to a 3.2-safe construct (see .claude/rules/bash-style.md)
• Mode-flag leak: add the reset to set_up, or scope the change to the single test

4. Verify

lib/bashunit tests --filter <test_name>   # Specific test
make test                                  # Full suite
make sa && make lint                       # Static checks

5. Prevent Regression

• Document the root cause in the commit message body when non-obvious
• Add an edge-case test if the failure exposed a missing case
• If the bug crossed mode-flag boundaries, add tests for each mode (dry-run, silent, verbose, force)

Debugging Tips

• Use --filter "test_name" to run a single test in isolation
• Add printf 'DEBUG: %s\n' "$var" >&2 temporarily - strip before commit
• If a test passes alone but fails in the suite, suspect a leaked BASHDEP_* global; reset in set_up
• For snapshot mismatches, diff the snapshot file vs current stdout before regenerating