* ci: run the Python test suite - CONTRIBUTING.md asks for tests CI never executes
CONTRIBUTING.md tells contributors to put Python tool tests in tests/
and run the relevant suites, and tests/ now holds real ones
(test_salary_lookup.py, test_convert_salary_excel.py from #75) - but no
CI job executes them. A suite that never runs in CI can't gate a PR and
silently rots. New python-tests job: unittest discover over tests/,
stdlib only, no new dependencies. Future test files run without any
workflow change.
Also lands tests/test_security_guards.py, which missed #84's merge
window (pushed to the branch as #84 was being merged; the merge took
2a6cb8c, the tests were 260c37a). 13 unittest cases in the existing
tests/ style: each copies the guard script into a synthetic repo tree
and runs it as a subprocess - the same way CI invokes it - asserting
real exit codes and messages. Every forbidden state fails (Bash(*) and
Bash(curl:*) additions, each personal-data gitignore rule removed one
at a time, each forbidden lifecycle script, trustedDependencies,
invalid settings JSON, zero manifests); every non-event passes (dropped
shipped permission, extra ignore rules, benign scripts, hostile
manifest inside node_modules); and the real repo passes its own guards.
22 tests total, all passing locally via the exact command the job runs.
* test: use benign lifecycle-script values in fixtures - AV heuristics flag attack-shaped strings
Review found the curl-pipe-to-sh fixture value matches a real Defender
signature (Trojan:Script/Stealer.HAX!MTB): Windows quarantines the temp
package.json mid-test, making the suite flaky for any Windows
contributor who runs it - while proving nothing extra, since the guard
flags the script KEY and never inspects the value.
Fixture values are now 'echo test' (also in the node_modules-ignored
test, same class of string), with a comment on the key-only test
explaining why the value must stay benign so a future 'make the fixture
realistic' cleanup doesn't reintroduce the quarantine flake. Coverage
is unchanged: same keys, same assertions, 13 tests passing.
