testsAndMisc/linux_configuration/scripts/periodic_background/lib/tests/services_assert.sh
Krzysztof kuhy Rudnicki 0a69d18390 check_and_enable_services: 100% coverage via a redirectable path prefix
Follow-up to 9085a4e5, which recorded services_units.sh at 84.51% because
its remaining branches sit behind [[ -f /etc/systemd/system/*.service ]] --
absolute root-owned paths that exist on this machine, so the else-branch
never runs and no PATH shim can redirect it.

All 87 such paths across the seven check libs now go through $SYSROOT, read
from SERVICES_ROOT. The prefix is deliberately NOT defaulted. Three commands
in hosts_fix_resolved run outside `run` and so are not stopped by --dry-run
(chattr -i on resolved.conf.d, find -delete over its *.conf, and an append to
resolved.conf); with an empty default, a test that forgot to set SERVICES_ROOT
would really delete this machine's resolved.conf drop-ins. Unset is therefore
a hard error and only an explicitly empty value means the real filesystem.

The harness now owns PATH outright: $FAKE_BIN for shims and staged fake apps,
$REAL_BIN for a curated set of symlinks to genuine coreutils. The machine's
/usr/bin is deliberately absent -- a really-installed discord and chromium
otherwise make the "no target apps present" branches untestable, which is
exactly what happened until these tests caught it.

Coverage, measured against run_all.sh because two test files jointly cover
services_common.sh after the 250-cap split: common 55/55, report 27/27,
units 72/72 (was 84.51%), wrappers 100/100, apps 66/66, browser 79/79 --
seven libs at 100%. services_hosts.sh reads 86.05% and services_hosts_fix.sh
97.30%, and those 14 lines are a kcov attribution artifact rather than a gap.
Falsified rather than assumed: the suite prints "51 passed, 0 failed" when run
under kcov, so no group is skipped, and every supposedly-uncovered line is an
issues+=("...") whose string can only reach stdout through the print loop
below it -- with a passing assertion matching that exact string.

Two falsification checks, both re-run after the rewrite: `--status --dry-run`
as root stays byte-identical to rev 6691cb26 modulo the Date: line, and the
sha256sums of /etc/hosts, /etc/nsswitch.conf and /etc/systemd/resolved.conf
plus the contents of resolved.conf.d are unchanged across a full suite run.
The second one is what makes a missed prefix site detectable instead of a
matter of inspection: the repair paths really do write.

220 assertions across 8 test files. Also fixes a bug in the harness's own
lsattr shim, where printf with a leading-dash format string parsed the dashes
as options and silently produced nothing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01F3PzGc75gBcdxP3PkHXGcV
2026-08-21 14:08:11 +02:00

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#!/usr/bin/env bash
# lib/tests/services_assert.sh — the assertion vocabulary shared by every
# check_and_enable_services test.
#
# Sourced by services_harness.sh, not directly by the tests. Split out of the
# harness purely to keep both files under the repo-wide 250-line cap, which
# applies to test files too.
#
# _t_called / _t_not_called read $DEV/calls, the log every PATH shim appends
# to, so they are only meaningful after the harness has defined $DEV.
PASS=0
FAIL=0
_t_pass() {
PASS=$((PASS + 1))
printf ' OK: %s\n' "$1"
}
_t_fail() {
FAIL=$((FAIL + 1))
printf ' FAIL: %s\n' "$1"
}
_t_eq() {
local want="$1"
local got="$2"
local what="$3"
if [[ "$got" == "$want" ]]; then
_t_pass "$what"
else
_t_fail "$what (want '${want}', got '${got}')"
fi
}
# Assert $DEV/calls contains a line matching a regex.
_t_called() {
local pattern="$1"
local what="$2"
if grep -qE "$pattern" "${DEV}/calls" 2>/dev/null; then
_t_pass "$what"
else
_t_fail "$what (no call matching /${pattern}/)"
fi
}
_t_not_called() {
local pattern="$1"
local what="$2"
if grep -qE "$pattern" "${DEV}/calls" 2>/dev/null; then
_t_fail "$what (unexpected call matching /${pattern}/)"
else
_t_pass "$what"
fi
}
_t_summary() {
printf '\n%s: %d passed, %d failed\n' "$(basename "$0")" "$PASS" "$FAIL"
[[ $FAIL -eq 0 ]]
}
TEST_TMPDIR="$(mktemp -d)"
trap 'rm -rf "${TEST_TMPDIR}"' EXIT
readonly DEV="${TEST_TMPDIR}/device"
readonly FAKE_BIN="${TEST_TMPDIR}/fake_bin"
mkdir -p "${DEV}" "${FAKE_BIN}"