test(runner): the cleaner's list file stays inside the test

tests/test_runner_cleanup.sh

@@ -3,7 +3,8 @@
 # Docker and without root: docker and stat are stand-ins on PATH that answer
 # from tables, and act-runner's private /tmp is a directory under a temp root.
 # stat is stood in because a ctime cannot be set back, and the cleaner goes by
-# ctime; find and rm are real, under the temp root only.
+# ctime; find and rm are real, under the temp root only. The cleaner's own
+# list file (mktemp) goes to a directory of the test too, not to /tmp.
 # Aufruf: bash tests/test_runner_cleanup.sh
 set -u
 
@@ -20,7 +21,7 @@ nok() { FAIL=$((FAIL + 1)); echo "NOT OK - $1"; }
 die() { echo "setup failed: $1" >&2; exit 1; }
 T="$(mktemp -d)" || die mktemp
 trap 'rm -rf "$T"' EXIT
-mkdir -p "$T/conf" "$T/bin" || die mkdir
+mkdir -p "$T/conf" "$T/bin" "$T/own" || die mkdir
 
 # patchmgr's file, as runner-install.sh lays it down.
 cat >"$T/conf/patchmgr.conf" <<'CONF_EOF' || die conf
@@ -81,7 +82,7 @@ fresh_tmp() {
 	rm -f "$T/rm-fails"
 }
 
-cleanup() { PATH="$T/bin:$PATH" CONF_DIR="$T/conf" TMP_ROOT="$T/root" bash "$CLEANUP"; }
+cleanup() { PATH="$T/bin:$PATH" CONF_DIR="$T/conf" TMP_ROOT="$T/root" TMPDIR="$T/own" bash "$CLEANUP"; }
 removed_any() { grep -q '^rm' "$T/calls"; }
 untouched() { [ -d "$R/counter-check-old" ] && [ -d "$R/go-build-old" ] && [ -d "$R/patchmgrx-old" ] && [ -d "$R/patchmgr-counter-check-old" ]; }
 
@@ -195,6 +196,9 @@ done
 fresh_tmp
 if MAX_AGE_HOURS=4 cleanup >/dev/null 2>&1; then ok "MAX_AGE_HOURS=4 is accepted"; else nok "MAX_AGE_HOURS=4 was refused"; fi
 
+# ── The cleaner's list files stay in the test and are removed ────────────────
+if [ -z "$(ls -A "$T/own")" ]; then ok "no list file is left behind"; else nok "list files left behind: $(ls -A "$T/own")"; fi
+
 echo
 echo "pass: $PASS, fail: $FAIL"
 [ "$FAIL" -eq 0 ]