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Krzysztof kuhy Rudnicki
d42d8ff20d
Gives linux_configuration/scripts/lib a real test suite, which takes all nine of its libraries off meta/shell-coverage-allowlist.txt at once — coverage is per-directory, so this is the highest-ratio first batch. 139 assertions across four suites, all offline: the mtk toolkit is driven through its existing MTK_ROOT_FIXTURE seam, and adb is shimmed onto a narrowed PATH. Nothing reads the wall clock, this host's udev rules, or a real device, because the suite runs in shell-tests.yml and again on every pre-push via ci-mirror — a host-dependent assertion would be a flake that blocks unrelated pushes. The gate only checks that tests/run_all.sh EXISTS, so an empty one would mark all nine libraries covered while testing nothing. Each of the four load-bearing rules was therefore mutation-tested and the suite required to go red: classify_device's && -> ||, discover_partitions' init_boot/boot ordering, mtk_select_device's refusal to guess between two phones, and is_hour_in_range's 10#$ octal guard. That last one initially SURVIVED. Dropping 10#$ makes bash abort with "value too great for base", a non-zero exit indistinguishable from an honest out-of-range result, so the status-only assertion passed either way. It now asserts stderr is empty. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
21 lines
3.0 KiB
JSON
21 lines
3.0 KiB
JSON
{
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"title": "Shrink the shell-coverage allowlist: a real test suite for linux_configuration/scripts/lib",
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"objective": "Start chipping at the 115-entry shell-coverage allowlist with the smallest concentrated batch, so the ratchet narrows rather than merely holding. One tests/run_all.sh covers all nine libraries in that directory at once, which is what makes this the highest-ratio first batch. The nine entries come off the allowlist as a result — the deliverable is the allowlist shrinking, not the suite existing.",
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"acceptance_criteria": [
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"run_all.sh runs every test_*.sh in the directory and exits 0, with all four suites reporting zero failures.",
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"The suite is proven NON-VACUOUS by mutation: the coverage gate only checks that tests/run_all.sh exists, so an empty file would mark all nine libraries covered while testing nothing. Each of the four load-bearing rules must be mutated and the suite must go red for each.",
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"meta/shell-coverage-allowlist.txt drops from 115 entries to 106, with zero entries remaining for linux_configuration/scripts/lib/ — the measured delta, not a rounded one.",
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"No assertion depends on wall-clock time, this host's udev rules, or a real device: the suite runs in shell-tests.yml and again on every pre-push via ci-mirror, so a host-dependent assertion becomes a push-blocking flake.",
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"Sourcing a library must not write outside the test tmpdir — android.sh calls ensure_dir on a $HOME path at source time.",
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"shellcheck and shfmt pass with no suppression added."
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],
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"out_of_scope": [
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"Wiring shell-coverage-ratchet into .pre-commit-config.yaml. That edit is denied as a sensitive file and belongs to the user; NEXT_SESSION_PROMPT.md carries the block.",
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"The effecting half of these libraries: require_hosts_readable (exec sudo), check_adb_device/check_adb_root (die -> exit), collapse_mounts (umount -l), install_missing_pacman_packages, require_imagemagick, notify. Phase 1 measured this pattern already — decision logic reaches ~90%, effecting code reaches 0%.",
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"mtk_udev_catchall_files, which globs /etc/udev/rules.d with no seam and would read this host's real rules.",
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"The other 106 allowlist entries; the next concentrated batches are single_use/features/lib (45) and single_use/fixes/lib (22).",
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"A percentage coverage bar. The bar remains presence, as settled in Phase 3."
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],
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"verifier": "bash linux_configuration/scripts/lib/tests/run_all.sh (exit 0; 139 assertions across 4 suites). Four mutations applied to throwaway copies, each required to turn the suite red: classify_device's `&&` -> `||` (would classify a stranger's MediaTek phone as the target device), discover_partitions' `init_boot boot` -> `boot init_boot` (would dump the wrong partition on Android 13+ hardware), mtk_select_device's `-gt 1` -> `-gt 99` (would silently pick one of two attached phones), and is_hour_in_range's `10#$` removal (the 08/09 octal trap). Allowlist delta measured with `grep -vc '^#\\|^$' meta/shell-coverage-allowlist.txt` before and after --seed."
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}
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