test: add test for "systemd-run -v"

test/units/TEST-07-PID1.startv.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# shellcheck disable=SC2016
+set -eux
+set -o pipefail
+
+# shellcheck source=test/units/util.sh
+. "$(dirname "$0")"/util.sh
+
+systemd-run -v --wait echo wampfl | grep wampfl
+
+systemd-run -v -p Type=notify bash -c 'echo brumfl ; systemd-notify --ready ; echo krass' |  grep brumfl
+
+mkdir -p /run/systemd/journald.conf.d/
+
+# Let's disable storage of debug messages, since we want to flood the journal
+# daemon with messages that it will have to process, but we do not actually
+# want to push out our own messages from storage while doing so
+cat >> /run/systemd/journald.conf.d/50-disable-debug.conf <<EOF
+[Journal]
+MaxLevelStore=info
+EOF
+
+systemctl restart systemd-journald
+
+# Now flood the journal via syslog and the stream transport to ensure this finishes correctly even if busy
+( xxd /dev/urandom | logger -p debug ) &
+( xxd /dev/urandom | systemd-cat -p debug ) &
+
+# Verify that this works even if the journal is super busy
+systemd-run -v -p Type=notify bash -c 'echo schmurz ; systemd-notify --ready ; echo kropf' |  grep schmurz
+
+kill %1
+kill %2
+
+rm /run/systemd/journald.conf.d/50-disable-debug.conf
+rmdir --ignore-fail-on-non-empty /run/systemd/journald.conf.d
+
+systemctl restart systemd-journald